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EP2091662A1 - Asperseur escamotable à longue portée - Google Patents

Asperseur escamotable à longue portée

Info

Publication number
EP2091662A1
EP2091662A1 EP07858926A EP07858926A EP2091662A1 EP 2091662 A1 EP2091662 A1 EP 2091662A1 EP 07858926 A EP07858926 A EP 07858926A EP 07858926 A EP07858926 A EP 07858926A EP 2091662 A1 EP2091662 A1 EP 2091662A1
Authority
EP
European Patent Office
Prior art keywords
sprinkler
housing
operative position
water
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07858926A
Other languages
German (de)
English (en)
Inventor
Arno Drechsel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2091662A1 publication Critical patent/EP2091662A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/14—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with oscillating elements; with intermittent operation
    • B05B3/16—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with oscillating elements; with intermittent operation driven or controlled by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/70—Arrangements for moving spray heads automatically to or from the working position
    • B05B15/72—Arrangements for moving spray heads automatically to or from the working position using hydraulic or pneumatic means
    • B05B15/74—Arrangements for moving spray heads automatically to or from the working position using hydraulic or pneumatic means driven by the discharged fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
    • B05B3/06—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet by jet reaction
    • B05B3/063—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet by jet reaction using a member, e.g. a deflector, for creating the tangential component of the jet

Definitions

  • This invention finds application in the art of irrigation devices, and particularly relates to a long-range pop-up sprinkler.
  • Pop-up sprinklers are known to be used for irrigating fields, gardens or the like.
  • Such known pop-up sprinklers generally include a hollow housing designed for underground installation and sprinkler means susceptible to move from a non- operative position within the housing to a raised operative position.
  • the sprinkler means generally include a vertical sprinkling arm having one or more end nozzles, which is adapted to form an "umbrella" jet.
  • prior art pop-up sprinklers are not able to evenly irrigate the surfaces to be irrigated, and often create puddles near the spray nozzles, thereby causing soil erosion and poor sprinkling at the areas farthest therefrom.
  • the object of this invention is to overcome the above drawbacks, by providing a pop-up sprinkler that is highly efficient and relatively cost-effective.
  • a particular object is to provide a pop-up sprinkler having such a long range as to meet the requirements of modern sport facilities.
  • a further object is to provide a small size pop-up sprinkler.
  • Another object of the invention is to provide a pop-up sprinkler that can irrigate very large surfaces.
  • a pop-up sprinkler device as defined in claim 1, comprising a housing designed for underground installation, a sprinkler designed to be inserted in said housing, fitting means for connecting said sprinkler to an external pressurized fluid supply line, actuator means associated to said sprinkler to drive it from an inoperative position of lower stop end within said housing to an operative position of upper stop end projecting from said housing and vice versa, wherein said sprinkler comprises an elongate tubular body and an end nozzle which define a jet-generating water gun, said water gun being designed to project out of said housing with said sprinkler in said upper limit stop operative position.
  • the pop-up sprinkler device of the invention has a much longer range than prior art devices.
  • the water gun acts as a sort of "launching pad” for water that will flow therethrough to the nozzle, which will increase its velocity and hence its range.
  • the use of a water gun allows irrigation of a very large area, whereas prior art pop-up sprinklers could only irrigate a relatively small area. Consequently, over a given area to be irrigated, a smaller number of sprinklers may be installed, and underground water supply piping can be further simplified, which affords savings in terms of installation and maintenance times and costs.
  • the sprinkler device of the invention can be installed relatively far from the surface to be irrigated, which is a critical feature on surfaces designed to be continuously and heavily trampled, such as sport fields or the like.
  • the sprinkler device of the invention can be installed outside the playing rectangular field, wherefore the integrity of the latter can be preserved, with no excavation or mud-slide occurring therein.
  • actuator means in the sprinkler device of the invention which are designed to drive it from a lower inoperative position within the housing to an upper operative position outside the housing, the device can be protected from any accidental failure and vandalism, and is of no danger to the users of the field in which it is installed.
  • the tubular body may advantageously define a longitudinal axis that is substantially inclined and not perpendicular to the plane defined by the peripheral top edge of said housing with said sprinkler in the upper operative position.
  • axis inclined to a plane and derivatives thereof shall be intended to indicate an axis that forms an angle other than zero with the relevant plane, i.e. an axis that does not belong to the plane.
  • the sprinkler device of the invention will have a very long range.
  • the actuator means may be of the rotary type, and are designed to pivotally drive the sprinkler about a first axis of rotation between the lower inoperative position and the upper operative position.
  • the sprinkler device of the invention will have a minimized bulk and involve minimized costs for the excavation required for burial of the housing for the water gun.
  • the sprinkler device of the invention may include pivotal connection means for connecting the fitting means to the water gun so that the latter is able to swing about an axis.
  • the sprinkler device of the invention can irrigate a rather large area, and also allows further reduction of the required sprinklers as compared with prior art, considering an equal area to be irrigated.
  • the actuator means can be connected to a first working fluid supply line
  • the sprinkler can be connected to a second pressurized water line and a circuit may be provided for controlling the inflow of the working fluid to the actuator means and of the pressurized water to the sprinkler.
  • such circuit may be configured to ensure sequential succession of inflow of the working fluid to the supply means and inflow of water to the sprinkler.
  • the sprinkler will only initiate irrigation of the surrounding area after reaching its operative position.
  • control circuit may be configured to ensure instantaneous inflow of water to the sprinkler.
  • control circuit may be configured to allow instantaneous stop of the inflow of pressurized water to the sprinkler as soon as the sprinkler reaches a substantially central swinging position, so that the stop of the inflow of working fluid to the actuator means is substantially simultaneous to the stop of the inflow of pressurized water to the sprinkler.
  • the sprinkler device may comprise jet breaker means which are susceptible of periodically interfere with the water gun jet to discontinue its flow and capture part of its energy to rotate and further improve its distribution.
  • the sprinkler device of the invention will afford even irrigation of the area to be irrigated, and prevent the formation of water puddles, typically occurring in prior art sprinklers.
  • FIG. 1 is an axonometric view of the sprinkler device of the invention in the inoperative position, with the working device is indicated by dashed lines;
  • FIG. 2 is an axonometric view of the sprinkler device of the invention in an intermediate position between the inoperative position and the operative position, in which part of the housing walls are outlined by dashed lines;
  • FIG. 3 is an axonometric view of the sprinkler device of the invention in the operative position, with part of the housing walls being indicated by dashed lines;
  • FIG. 4 is a side view of the sprinkler device of FIG. 1, with part of the walls of the housing 2 omitted;
  • FlG. 5 is a side view of the sprinkler device of FIG. 3, with part of the walls of the housing 2 omitted;
  • FIG. 6 is an axonometric view of the sprinkler device of the invention.
  • FIG. 7 is a further axonometric view of the sprinkler device of the invention.
  • FIG. 8 is a top view of the sprinkler device of the invention.
  • FIG. 9 is a front view of the sprinkler device of the invention.
  • FIG. 10 is an axonometric view of the actuator cylinder for driving the sprinkler device of the invention, with the liner omitted;
  • FIG. 11 is a sectional view of the cylinder of FIG. 8, as taken along a plane Xl-Xl.
  • FIG. 12 is a schematic view of a first embodiment of the control circuit of the inventive sprinkler device.
  • FIG. 13 is a schematic view of the circuit of FIG. 12 in an initial step, i.e. with the sprinkler device of the invention in a inoperative position (corresponding to Figure 1) ;
  • FIG. 14 is a schematic view of the circuit of FIG. 12 in a first operating phase, i.e. with the sprinkler device of the invention in an intermediate position between the inoperative position and the operative position (corresponding to Figure 2);
  • FIG. 15 is a schematic view of the circuit of FIG. 12 in a second operating phase, i.e. with the sprinkler device of the invention in the operating position (corresponding to Figure 3);
  • FIG. 16 is a schematic view of the circuit of FIG. 12 in a third operating phase, i.e. with the sprinkler device of the invention in an intermediate position between the operative position and the inoperative position.
  • FIG. 17 is an axonometric view of a second embodiment of the sprinkler device of the invention.
  • FIG. 18 is a further axonometric view of the second embodiment of the sprinkler device as shown in FIG. 17;
  • FIG. 19 is a schematic view of a second embodiment of the control circuit of the inventive sprinkler device;
  • FIG. 20 is a schematic view of the circuit of FIG. 19 in an initial phase, i.e. with the sprinkler device of the invention in a inoperative position (corresponding to Figure 1) ;
  • FIG. 21 is a schematic view of the circuit of FIG. 19 in a first operating phase, i.e. with the sprinkler device of the invention in an intermediate position between the inoperative position and the operative position (corresponding to Figure 2);
  • FIG. 22 is a schematic view of the circuit of FIG. 19 in a second operating phase, i.e. with the sprinkler device of the invention in the operative position (corresponding to Figure 3);
  • FIG. 23 is a schematic view of the circuit of FIG. 19 in a third operating phase, i.e. with the sprinkler device of the invention in an intermediate position between the operative position and the inoperative position.
  • the pop-up sprinkler device of the invention essentially comprises a housing defined by a box-like body 2 and a sprinkler 3 inserted therein, which is able to move from a lower inoperative position within the housing 2, as shown in Figure 1 , to an upper operative position outside it, as shown in Figure 3.
  • the box-like body 2 will be buried in a trench dug in the ground.
  • the sprinkler 3 comprises a water gun 4 of the type having an elongate tubular body 5 with a pressurized water inlet portion 6 and an outlet portion 7 having a jet- forming nozzle 6.
  • the tubular body 5 defines a longitudinal axis X which is inclined to the plane ⁇ defined by the peripheral top edge B, as particularly shown in Figure 3, thereby forming an angle ⁇ other than zero.
  • the sprinkler 3 is designed to be connected to a pressurized water supply line L using suitable fitting means, generally designated by numeral 9.
  • Rotary actuator means are further provided, generally designated by numeral 10, for pivotally driving the sprinkler about the axis Z from the lower inoperative position to the upper operative position and vice versa. It shall be understood that the sprinkler can move to the operative position from the inoperative position by a motion other than the rotary motion, such as a translational or rotary and translational motion, without departure from the scope as defined in the annexed claims.
  • the box-like body 2 has a cover 2' pivotally mounted thereto for rotating about a second axis of rotation Z' parallel to the axis Z.
  • the cover By rotating about the axis Z', the cover will move from a closed position, as shown in Figure 1, to an open position, as shown in Figure 3, along with the pivotal motion of the sprinkler 3 from the inoperative position to the operative position.
  • the closed cover 2' When the sprinkler device 1 is in the inoperative position, the closed cover 2' will make the surface in which the body 2 is buried usable and walkable, while further protecting the sprinkler 3 from vandalism.
  • the sprinkler 3 has a lever 3' with an elongate end portion 3" rigidly connected thereto and an opposite end 3"' with a wheel W designed to run along a track T.
  • the rotational actuator means 10 will include an actuator cylinder 11, whose operation will be described hereinafter, which is mounted to a wall plate 12 attached to opposite walls 13, 13' of the box- like body 2.
  • the fitting means 9 include a first pipe 14 connected to a rigid elbow 15, which is in turn connected to the water gun 4.
  • the elbow 15 has a first end 16 connected to the end portion 17 of the pipe 14 by the rotating joint 18, which is supported by the bracket 19 rigidly attached to the wall plate 12.
  • the elbow 15 has a second end 20 attached to a flange 21 that is coupled to a counterflange 21' in turn connected to the water gun 4.
  • the pipe 14 further has a valve 57 that controls water inflow to the sprinkler 3. This will provide fluid connection between the pipe 14 and the water gun 4.
  • the elbow 15 is rigidly connected to the head 24 of the shaft 25 of the actuator cylinder 11, to rigidly follow its rotation about the axis Z.
  • the rigid connection between the elbow 15 and the actuator cylinder 11 may be provided by the lever 3', to minimize the stress on the elbow 15.
  • the lever 3' may have a square receptacle 22 at the end 3", for receiving the square head 24 of the shaft 25.
  • the elbow may have a hollow receptacle 22' for receiving the lever 3'.
  • the actuator cylinder will drive into rotation both the lever 3', which will lift the cover 2', and the elbow 15, which will lift the water gun 4, while causing the latter to move from the inoperative position to the operative position and vice versa. Thanks to this configuration, most of the rotational stress will be carried by the lever 3', and the stress on the elbow 15 will be minimized.
  • the actuator cylinder 11 has a liner 11' that defines an inner chamber 26, in which a piston 27 slides along the axis Z while being rotationally locked.
  • the piston 27 has a bottom wall 28 and a substantially cylindrical side wall with two helically extending grooves 30, 30' defining cam means.
  • the shaft 25 has the head-defining end portion 24 rigidly connected to the portion 3" of the lever 3', which is in turn rigidly connected to the elbow 15.
  • the shaft 25 has the other end 31 rigidly connected to a crosspiece 32 that acts as a cam follower with both ends 33, 33' equipped with bearings 34, 34' to slide in the helically extending grooves 30, 30'.
  • the end wall 35 of the actuator cylinder 11 will have a faucet 36 allowing a working fluid to flow into the chamber 26 and exert pressure upon the free surface 37 of the bottom wall 28 of the piston 27, thereby causing its translation along the axis Z in the direction of arrow F-
  • Such translation will cause the shaft 25 to rotate about the axis Z, i.e. in the direction of arrow F 2 , with the elbow 15 and the water gun 4 attached thereto also rotating with it.
  • a rotating joint 38 is provided between the elbow 15 and the water gun 4, which is designed to swing about the axis Y, as taught by EP-B1 -0544688 by the Applicant hereof.
  • swinging axis Y is shown in the Figures with a substantially vertical orientation, it can have any inclination, as long as it is not parallel to the plane ⁇ defined by the peripheral top edge B of the housing 2, without departure from the scope as defined by the annexed claims.
  • water gun 4 may also be stationary and not designed to swing about the axis Y, without departure from the inventive scope as defined in the annexed claims.
  • the swing angle ⁇ of the water gun 4 will be thus adjustable using special means, still as taught by the above mentioned patent.
  • the rotating joint 38 may be configured as taught by EP-B1-1152835 by the Applicant hereof.
  • a pair of lugs 39, 39' will be provided, which are defined by elongate protrusions of two open rings 40, 40' fitting around a nipple 41 for connecting the joint 38 and the flange 21 , as particularly shown in Figure 9.
  • the nipple 41 may define the substantially vertical axis Y.
  • the water gun 4 will have a bracket 42 rigidly connected thereto, having an elongate protrusion 43 of such a length as to alternately impact the lugs 39, 39' during rotation of the gun 4.
  • the rotation angle ⁇ of the water gun 4 can be adjusted by suitable operation of the rings 40, 40'.
  • the gun has jet-breaker means, generally designated by numeral 44, that can be configured as taught by EP-B1 -0758926 by the Applicant hereof.
  • the jet-breaker means 44 include a rocker 45, coupled to the tubular body 5, which has a deflector 46 that periodically interferes with the jet generated by the nozzle 8 to discontinue its flow.
  • a motion reversal mechanism may be further provided, configured as taught by the above mentioned EP-B1 -0758926.
  • the jet will at least partly release its energy to the rocker 45, while inducing forces having both axial and radial components for causing the rocker 45 to transversely swing about the axis X.
  • the rocking motion thereof about the axis X will drive the tubular body 5 into rotation about the axis Y, until the protrusion 43 of the bracket 42 impacts the lug 39, which will stop its rotation in the desired angular position.
  • the motion reversal mechanism will be operated to move the rocker 45 back to its starting position, with the deflector 46 tending to cause an oppositely directed swinging motion thereof and a homologous rotation of the tubular body 5, which will rotate until the protrusion 43 of the bracket 42 impacts the lug 39'.
  • the sprinkler device of the invention includes a circuit, generally designated by numeral 50, for controlling the inflow of the working fluid to the actuator means 10 and the inflow of the pressurized water to the sprinkler 3. While the actuator means 10 and the sprinkler, as shown in the annexed drawings, are connected to a common source of pressurized water, each of them shall be understood as being able to be individually connected to its own fluid source, and to have a different fluid circulating therein, without departure from the scope as defined by
  • the control circuit 50 may generally include sensor means 51 , 51' for detecting the position of the sprinkler 3 both as it rotates about the axis Z and as it rocks about the axis Y, and valve means 51" connected to the sensor means.
  • the valve means 51" may include a first servovalve 53 having an output connected to the input of the actuator means 10 for controlling the rotation of the sprinkler 3 between the inoperative position and the operative position, and a second servovalve 56 having an output connected to a valve 57 for supplying fluid to the sprinkler 3 to control fluid flow into the tubular body 5.
  • Figures 12 to 16 show a first embodiment of the control circuit 50, which is of the hydraulic type.
  • the circuit 50 has a pressurized water supply line L having a first branch 52 connected to a servovalve 53 that controls water inflow to the actuator cylinder 3 through the faucet 36.
  • a free reflux adjustment valve 54 is further provided on the branch 52.
  • the circuit 50 also has a second branch 55 incorporating the second servovalve 56 connected to a valve 57 for controlling water inflow to the sprinkler 3.
  • the second servovalve 56 is connected, through the branch 38, to a first hydraulic limit switch 59 associated to the actuator 11, as shown in Figures 4 and 5.
  • the hydraulic limit switch 59 has an output connected to the input of the second servovalve 56.
  • branch 60 connects the switch 59 to the first servovalve 53.
  • the first servovalve 53 has an output that can be selectively connected either to the input of the actuator cylinder 11 or to a drain, whereas the second servovalve
  • the control circuit 50 further comprises a solenoid valve 61 operated by the solenoid 61'.
  • the solenoid valve 61 has an input connected to the pressurized water supply line L and an output that can be selectively connected to the input of the first servovalve 53 or to the input of the first hydraulic limit switch 59.
  • solenoid valve 61 is connected through the branch 62 to a second hydraulic limit switch 63 associated to the water gun 4.
  • a timer 64 is also associated to the solenoid.
  • the second hydraulic limit switch 63 has an input connected to the output of the solenoid valve 61 and an output that can be selectively connected to a drain or sluice.
  • the control circuit 50 further comprises a timer 64 that can be connected to the solenoid 61' of the solenoid valve 61.
  • circuit 50 The operation of the circuit 50 is shown in Figures 13 to 16, in which thicker lines indicate water pressure.
  • Figure 13 shows the circuit 50 in the inoperative position.
  • both the servovalves 53 and 56 and the solenoid valve 61 are under pressure.
  • Figure 14 shows a first operating step of the circuit 50, which takes place while the cover 2' opens and the water gun 4 pivots from the inoperative position to the operative position.
  • the timer 64 gives a first signal to the solenoid 61 which starts the circuit sequence.
  • the solenoid 61' opens the solenoid valve 61 , thereby allowing water to flow therethrough. Therefore, water opens the servovalve 53 of the actuator 11 , for water and pressure to flow therethrough. Therefore, the cover 2' opens and the water gun 4 reaches the operative position.
  • the actuator 11 receives water and pressure, while the valve 57 is still under pressure (closed).
  • the switch 59 is under pressure.
  • the first sensor means 51 include the switch 59 and a driving screw 65 thereof, associated with the lever 3'. As it rotates about the axis Z, the driving screw 65 of the switch 59 passes from the position as shown in Figure 4 to the position as shown in Figure 5, for switch operation.
  • FIG. 15 shows an operating step of the circuit 50, which takes place while the sprinkler device of the invention is in the operative position. Once the sprinkler has reached its upper limit stop operative position, with the switch 59 being thence operated, water flows into the latter and operates the servovalve 56 for the valve 57, thereby relieving it. Now, water is free to flow and the sprinkler 3 is thereby operated, and starts to rock about the axis Y by an angle ⁇ .
  • the second sensor means 51' include the switch 63 and a driving cam 66 thereof, rigidly associated with the sprinkler 3. It shall be noted that, during this step, the interaction of the cam 66 with the switch 63 has no consequence.
  • Figure 16 shows a third and last operating step of the circuit 50, which takes place while the sprinkler 3 moves from the operative position to the inoperative position, i.e. while the cover 2' closes.
  • a second signal of the timer 64 gives a pulse to the solenoid 61', which drives the solenoid valve 61 back to the start position.
  • the water gun 4 with the solenoid valve 61 in this condition will continue to rock and irrigate the surrounding area until the cam 66 interacts with the switch 63.
  • the valve 57 will instantaneously close, and the supply to the water gun 4 will stop.
  • the latter will be locked in a substantially central rocking position, corresponding to a position substantially aligned with the median plane ⁇ ' defined by the body 2, which does not interfere with the closing path of the cover 2'.
  • the hydraulic circuit 50 is brought back to the start position, with the servovalve 56 under pressure and the actuator being relieved, so that the sprinkler 3 can rotate about the axis Z to the inoperative position, with the cover 2' being driven therealong.
  • Figures 17 to 23 show a second embodiment of the invention, in which the inflow of the working fluid to the actuator means 10 and of pressurized water to the sprinkler 3 are controlled by an electrohydraulic circuit 50.
  • the sensor means 51 will include a first electric proximity sensor 70 associated with the actuator means 10 to detect the position of the sprinkler 3 as it rotates about the axis Z, whereas the second sensor means 51' will include a second electric proximity sensor 70' associated with the sprinkler 3 to detect the angular position ⁇ of the latter as it rocks.
  • the valve means 51" include a first solenoid valve 71 associated with the actuator means 10 and a second solenoid valve 72 associated with the valve 57 for supplying fluid to the sprinkler 3. Both solenoid valves 71 , 72 have an input connected to the pressurized water supply line L and respective outputs designed for selective connection with the actuator means 10 or with the supply valve 57 or with a drain.
  • the first and second electric proximity sensors 70, 70' and the first and second solenoid valves 71 , 72 are connected to a central microprocessor unit 77 with a timer 64.
  • the solenoid valves 71 , 72 are energized by respective solenoids 74, 75 that can be selectively actuated by the microprocessor unit 77.
  • the microprocessor unit 77 is programmed to process the electric signals from the sensors 70, 70' and sequentially control actuation of the solenoid valves 71 , 72.
  • Figure 19 shows the electrohydraulic diagram of the second embodiment of the control circuit 50.
  • Figures 19 to 23 represent hydraulic connections on the right and electric connections on the left, for mutual interfacing in a per se known manner. It can be noted that the two valves 71 and 72 are under pressure.
  • Figure 20 shows a first operating step of this second embodiment of the circuit, which takes place while the sprinkler 3 is in the intermediate position as shown in Figure 2.
  • the timer 64 provides a first signal to the unit 77, which closes the switch 73 and supplies a pulse to the first solenoid 74 while energizing the proximity sensor 70.
  • the solenoid 74 opens in turn the servovalve 71 , thereby allowing water to flow into the actuator cylinder 11 and to pivot the sprinkler 3 about the axis Z to its upper limit operative position.
  • Figure 21 shows a later step of the operating cycle of the circuit 50.
  • the proximity sensor 70 previously energized, detects the upper operative position of the sprinkler 3, it closes, thereby energizing the second solenoid 75. Once the latter is energized, it opens the second servovalve 72, thereby allowing the valve 57 to open and the sprinkler 3 to start irrigating, while swinging about the axis Y.
  • Figure 22 shows another operating step of the circuit 50.
  • the unit 77 will open the switch 73, thereby energizing the second proximity switch 70'.
  • the sprinkler will continue to swing until the lug 76 impacts the proximity sensor 70', which will indicate the right position for closing the valve 72.
  • the valve 57 will instantaneously close, and the supply to the water gun 4 will stop.
  • the latter will be locked in a substantially central rocking position, corresponding to a position substantially aligned with the median plane ⁇ defined by the body 2, which does not interfere with the closing path of the cover 2'.
  • the hydraulic circuit 50 is brought back to the start position, with the servovalve 72 under pressure and the actuator 11 being relieved, so that the sprinkler 3 can rotate about the axis Z to the inoperative position, with the cover 2' being driven therealong.
  • control circuit 50 may be of any type whatever without departure from the inventive scope as defined by the contents of the annexed claims.
  • the sprinkler device of the invention fulfills the intended objects and particularly meets the requirement of providing a pop-up sprinkler having a long range.
  • a pop-up sprinkler has been further provided that has a very small size and can irrigate very large surfaces.
  • the sprinkler device of this invention is susceptible to a number of changes and variants, within the inventive concept disclosed in the appended claims. All the details thereof may be replaced by other technically equivalent parts, and the materials may vary depending on different needs, without departure from the scope of the invention.

Landscapes

  • Nozzles (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Abstract

L'invention concerne un dispositif asperseur escamotable doté d'un compartiment (2) conçu pour une installation en sous-sol, un asperseur (3) conçu pour être inséré dans le compartiment, des moyens de fixation (9) pour une connexion hydraulique à l'asperseur (3) vers des moyens (3) externes d'approvisionnement en liquide sous pression susceptibles de le déplacer d'une position finale basse non opérationnelle à l'intérieur du compartiment (2) vers une position finale haute opérationnelle à l'extérieur du compartiment (2). L'asperseur (3) comprend un pistolet à eau (4) de type à corps tubulaire allongé (5) et une buse d'extrémité à jet (8).
EP07858926A 2006-12-01 2007-11-30 Asperseur escamotable à longue portée Withdrawn EP2091662A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000346A ITVI20060346A1 (it) 2006-12-01 2006-12-01 Irrigatore a scomparsa a lunga gittata
PCT/IB2007/003720 WO2008068583A1 (fr) 2006-12-01 2007-11-30 Asperseur escamotable à longue portée

Publications (1)

Publication Number Publication Date
EP2091662A1 true EP2091662A1 (fr) 2009-08-26

Family

ID=39232863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07858926A Withdrawn EP2091662A1 (fr) 2006-12-01 2007-11-30 Asperseur escamotable à longue portée

Country Status (3)

Country Link
EP (1) EP2091662A1 (fr)
IT (1) ITVI20060346A1 (fr)
WO (1) WO2008068583A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101972721B (zh) * 2010-11-16 2012-08-29 武汉大学 可控喷洒装置
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ITVI20060346A1 (it) 2008-06-02

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