Rotary nozzle device

Abstract

To provide a rotary nozzle device capable of sufficiently extending a jet reaching distance which enables an effective washing force to be maintained.SOLUTION: A rotor 3 is rotatably fitted around a rotor shaft 2. A straight nozzle tip 7, 8 is provided on the outer peripheral surface of the rotor 3. The jetting direction of the straight nozzle tip 7, 8 is inclined in a peripheral direction. Washing water is jetted while rotating the rotor 3 through reaction to the jet. A commutator 9 for aligning the direction of water flowing is provided on the upstream side of the straight nozzle tip 7, 8 to commutate the washing water. A commutation pipe 10 for making uniform a flow velocity of the washing water is provided on the upstream side of the commutator 9. Water flowing into the straight nozzle tip 7, 8 is commutated, and a jet reaching distance which enables an effective washing force to be maintained is sufficiently extended.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a rotary nozzle device in which the spray direction of the spray nozzle is inclined circumferentially with respect to a direction parallel to the central axis of the rotor, and sprays water while rotating the rotor in reaction to the spray. [Background technology]

[0002] Generally, nozzle devices used for various cleaning processes remove dirt by spraying a high-pressure jet stream from a spray nozzle. One such nozzle device is a rotary nozzle device in which the spray nozzle is attached to a rotor at an angle circumferentially relative to a direction parallel to the central axis, and the rotor is rotated by the reaction force of the spray while spraying cleaning water.

[0003] In such a rotary nozzle device, a straight nozzle tip that sprays water straight at high speed is used for the spray nozzle, thereby increasing the reach of the jet that can maintain effective cleaning power, thereby increasing the distance between the surface to be cleaned and the spray nozzle as much as possible and preventing the high-speed rotating spray nozzle from coming into contact with the surface to be cleaned.

[0004] However, in a rotary nozzle device, the water to be sprayed is supplied to the spray nozzle through a flow path that is, for example, bent inside the rotor or has a suddenly changing cross-sectional area, which can easily cause turbulence in the water flow within the flow path, reducing the straightness of the jet. In this case, even if a straight-moving nozzle tip is used for the spray nozzle, the reach of the jet that can maintain effective cleaning power can only be extended to, for example, about 300 to 400 mm, and since the rotary nozzle device must be brought close to the surface to be cleaned to some extent, there remains the risk of the spray nozzle coming into contact with the surface to be cleaned.

[0005] In response to this, Patent Document 1 discloses a rotary nozzle device that prevents a decrease in cleaning effectiveness by providing a flow straightening piece on a straight nozzle tip to straighten the turbulent fluid (see, for example, FIG. 5).

[0006] The rotary nozzle device shown in Figure 5 has a rotor 102 rotatably supported by a main body 101 to which a straight nozzle tip 103 is screwed at an angle, and a flow straightening piece 104 is provided on the straight nozzle tip 103. A central through-hole 105 of the main body 101 communicates with the straight nozzle tip 103 via a through-hole 106 drilled in the radial direction of the rotor 102, and by supplying high-pressure cleaning water to the central through-hole 105, the rotor 102 is rotated by the spray pressure of the straight nozzle tip 103. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 5-329404 (paragraphs 0014, 0017, Figure 4) Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the rotary nozzle device of Patent Document 1, after the cleaning water passes through the central through-hole of the main body and the through-hole of the rotor, it changes direction significantly before flowing into the straight-moving nozzle tip, so the flow path bends in two places.

[0009] At the bend in the flow path, the flow velocity is faster on the outside of the bend and slower on the inside of the bend, and this difference in flow velocity causes strong turbulence in the flow of cleaning water.This strongly turbulent flow of cleaning water flows into the straight-moving nozzle tip, shortening the reach of the jet that can maintain effective cleaning power.

[0010] In Patent Document 1, a straight nozzle tip is provided with a flow straightening piece to smooth out turbulence in the flow, but the flow straightening piece simply aligns the flow direction in the flow path by setting the plate surface parallel to the flow path direction, and it cannot fully eliminate the difference in flow speed of the wash water within the flow path. Therefore, even if a straight nozzle tip is simply provided with a flow straightening piece, it is not possible to straighten the wash water to an extent that the reach of the jet can be sufficiently extended to maintain effective detergency.

[0011] SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary nozzle device capable of sufficiently extending the reach of a jet of water while maintaining effective cleaning power. [Means for solving the problem]

[0012] In order to achieve the above object, the rotary nozzle device of the present invention comprises a rotor shaft, a rotor rotatably fitted on the rotor shaft, a water supply passage formed in the rotor shaft, a water conduit that guides water supplied to the central hole of the rotor via the water supply passage to an outlet on the outer periphery of the rotor, and an injection nozzle that sprays the water guided to the outlet by the water conduit, the injection direction of the injection nozzle being inclined circumferentially with respect to a direction parallel to the central axis of the rotor, and the water is sprayed while rotating the rotor in reaction to the injection, a commutator is provided upstream of the injection nozzle to rectify the water flowing into the injection nozzle, and a rectifying pipe is interposed between the outlet and the commutator to equalize the flow rate of the water.

[0013] According to the above configuration, a rectifying pipe that equalizes the flow rate is interposed between the outlet on the outer circumferential surface of the rotor and the commutator upstream of the spray nozzle, so even if a difference in flow rate occurs in the cross section of the flow path near a bent portion in the flow path leading to the spray nozzle, for example, the difference in flow rate can be suppressed as the water passes through the rectifying pipe. As a result, the flow rate of the water can be equalized within the cross section of the flow path before it reaches the commutator, and the commutator aligns the direction of the water flow to rectify the water flowing into the spray nozzle, sufficiently extending the reach of the jet that can maintain effective detergency.

[0014] The flow straightening pipe may also be curved so that the jet direction of the jet nozzle is inclined radially with respect to a direction parallel to the central axis of the rotor.

[0015] With this configuration, by making the straightening pipe curved, the spray direction of the injection nozzle is tilted radially of the rotor, and the curved shape of the straightening pipe can be adjusted appropriately to set the spray direction of the rotary nozzle device to a desired spread. As a result, the circumferential inclination of the spray direction of the injection nozzle can be adjusted to adjust the rotational speed of the rotor due to the reaction of the injection, while the curved shape of the straightening pipe can be adjusted to adjust the spread of the spray direction, making it possible to adjust both the rotational speed and the spread of the spray direction in a single rotary nozzle device. [Effects of the Invention]

[0016] As described above, according to the present invention, a commutator is provided upstream of the jet nozzle of a rotary nozzle device, and a rectifying pipe is interposed between the outlet on the outer circumferential surface of the rotor and the commutator to equalize the flow rate of the water flowing into the commutator. As a result, even if a difference in flow rate occurs due to, for example, a bent portion of the flow path leading to the jet nozzle, the difference in flow rate can be suppressed as the water passes through the rectifying pipe, and the commutator can align the direction of the water flow, rectifying the water flowing into the jet nozzle.

[0017] As a result, the reach distance of the jet that can maintain effective cleaning power can be extended to, for example, about 1000 mm, and the distance between the cleaning surface and the spray nozzle can be made sufficiently large to prevent the high-speed rotating spray nozzle from coming into contact with the cleaning surface. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view of a rotary nozzle device according to the present invention; [Figure 2] Side view of the rotary nozzle device [Figure 3] Vertical cross-sectional view of a rotary nozzle device [Figure 4] Perspective view of the flow rectifier [Figure 5] Vertical cross-sectional view of a conventional rotary nozzle device DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a rotary nozzle device according to the present invention will be described with reference to the drawings.

[0020] As shown in Figures 1 to 3, the rotary nozzle device 1 sprays high-pressure cleaning water from a nozzle while rotating to remove dirt from automobiles and the like. It comprises a rotor shaft 2, a rotor 3 rotatably fitted around the rotor shaft 2, a water supply passage 4 formed in the rotor shaft 2, a water conduit 6 that guides the cleaning water supplied to a central hole 5 of the rotor 3 via the water supply passage 4 to an outlet 6a on the outer circumferential surface of the rotor 3, and a pair of straight-advancing nozzle tips 7 and 8 that act as spray nozzles that spray the cleaning water guided to the outlet 6a by the water conduit 6, with the spray direction of the straight-advancing nozzle tips 7 and 8 inclined circumferentially with respect to a direction parallel to the central axis of the rotor 3, so that the high-pressure cleaning water is sprayed while rotating the rotor 3 in reaction to the spray. Furthermore, a commutator 9 is provided upstream of the straight-line nozzle tips 7, 8 to rectify the flow of cleaning water flowing into the straight-line nozzle tips 7, 8, and a rectifier pipe 10 is interposed between the outlet 9a and the commutator 9 to make the flow rate of the cleaning water uniform. The rectifier pipe 10 is curved so that the spray direction of the straight-line nozzle tips 7, 8 is inclined radially relative to a direction parallel to the central axis of the rotor 3.

[0021] The rotor shaft 2 has a cylindrical shape with a large-diameter base end 2a that can be connected to, for example, a high-pressure hose, and a water supply passage 4 is formed in the area extending from the base end to the outer peripheral surface near the center in the longitudinal direction. The water supply passage 4 extends from a water supply port 11 on the base end surface of the rotor shaft 2 along the central axis to near the axial center, and then branches out in four directions while extending radially to reach the outer peripheral surface of the rotor shaft 2 near the axial center.

[0022] The rotor 3 is cylindrical with a central hole 5 and is rotatably fitted onto the rotor shaft 2. The rotor 3 is held in place by a nut 12 bolted to the tip of the rotor shaft 2 and a slide plate 13 arranged on the stepped surface on the front side of the base end 2a of the rotor shaft 2, allowing slight movement in the front-rear direction.

[0023] The nut 12 has a larger diameter than the central hole 5 of the rotor 3 and is sized to fit into a recess 14 formed on the periphery of the tip opening of the central hole 5, thereby preventing the rotor 3 from slipping off the rotor shaft 2.

[0024] The water conduits 6 are formed so as to extend from two points in the central hole 5 of the rotor 3 to the outer circumferential surface of the rotor 3, and a connector 15 is threadedly attached to the outlet 6a of each water conduit 6, connecting the straight nozzle tips 7, 8 via a flow straightening pipe 10. The connector 15 is L-shaped with an arc-shaped curved flow path inside, and changes the flow path direction from the radial direction to a direction inclined circumferentially relative to a direction parallel to the central axis line at a right angle.

[0025] The cleaning water supplied to the central hole 5 of the rotor 3 from the four discharge ports 16 of the water supply channel 4 is led to the outlets 6a of each water conduit 6, and its flow direction is changed at the connecting part 15 to a direction inclined circumferentially relative to a direction parallel to the central axis line, and then changed to a direction inclined radially by the curved straightening pipe 10, and is sprayed from the straight nozzle tips 7 and 8.

[0026] The straight-advancing nozzle tips 7, 8 are designed to adjust the angle of connection 15, which has outlet 6a as its rotation center, to adjust the angle of inclination of the spray direction in the circumferential direction relative to a direction parallel to the central axis of rotor 3, thereby adjusting the rotational speed of rotor 3 caused by the reaction of the spray. In this case, by setting the inclination angles of the straight-advancing nozzle tips 7, 8 to different angles, for example, the straight-advancing nozzle tip 7, which is inclined greatly, can be used for driving, and the straight-advancing nozzle tip 8, which is inclined slightly, can be used for braking, and this combination can ensure stable rotation of rotor 3.

[0027] The commutator 9 has a structure in which a pair of hexagonal cylindrical bodies 9a, 9b are screwed together to form a single unit, and a rectifying piece 17 is fitted inside the cylindrical body 9a at the base end. The base end of the cylindrical body 9a at the base end is fitted onto the rectifying pipe 10, and the straight nozzle tips 7, 8 are connected to the tip end of the cylindrical body 9b at the tip end.

[0028] 4, the flow straightening pieces 17 are configured in a cross shape with plates parallel to the flow path direction, dividing the inside of the commutator 9 into four sections and aligning the flow of cleaning water passing through the inside with the flow path direction. For example, the base 17a of the flow straightening pieces 17 protrudes in the radial direction and is sandwiched between the cylindrical body 9b on the tip side and the flow straightening pipe 10.

[0029] The straightening pipe 10 is interposed between the outlet 9a and the commutator 9 to equalize the flow rate of the cleaning water before it reaches the commutator 9, and by appropriately selecting its curved shape, the angle of inclination of the spray direction of the straight nozzle tips 7, 8 in the radial direction relative to the direction parallel to the central axis of the rotor 3 can be adjusted to set the spray of the rotary nozzle device 1 to the desired spread.

[0030] With the above configuration, the flush water that flows from the water supply channel 4 into the water conduit 6 changes direction at a right angle at the junction 15, causing the flow rate of the flush water to become uneven and turbulent, but by providing a commutator 9 and a flow rectifier pipe 10 upstream of the straight-advancing nozzle tips 7, 8, the flow rate is made uniform by the flow rectifier pipe 10, and the flow direction is then aligned by the commutator 9, thereby rectifying the turbulent flow. As a result, flush water that has been sufficiently rectified can be sprayed from the straight-advancing nozzle tips 7, 8, and the reach of the jet that can maintain effective detergency can be extended to, for example, about 1000 mm, and the rotating nozzle device 1 can be placed far enough away from the surface to be washed to prevent the fast-rotating straight-advancing nozzle tips 7, 8 from coming into contact with the surface to be washed.

[0031] Furthermore, since the flow straightening pipe 10 is curved and the spray direction of the straight nozzle tips 7, 8 is tilted radially of the rotor 3, the curved shape of the flow straightening pipe 10 can be appropriately adjusted to set the desired spread of the spray direction of the rotary nozzle device 1. This makes it possible to adjust the circumferential tilt of the spray direction of the straight nozzle tips 7, 8 to adjust the rotational speed of the rotor 3 due to the reaction of the spray, while also adjusting the curved shape of the flow straightening pipe 10 to adjust the spread of the spray direction, making it possible to adjust both the rotational speed and the spread of the spray direction with a single rotary nozzle device 1.

[0032] The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, the rotary nozzle device 1 may be any device that includes a commutator 9 and a flow straightening pipe 10 provided upstream of the straight nozzle tips 7, 8, and the flow straightening pipe 10 does not necessarily have to be curved. [Explanation of symbols]

[0033] 1 Rotating nozzle device 2 rotor shaft 2a Proximal end 3 rotors 4 Water supply channel 5 center hole 6 Waterway 6a Outlet 7, 8 Straight nozzle tip 9 commutator 9a, 9b cylinder 10. Rectifier pipe 11 Water inlet 12 nuts 13 Slide 14 Recess 15 Connection 16 Outlet 17 Rectifier piece 17a base

Claims

1. A rotary nozzle device comprising: a rotor shaft; a rotor rotatably fitted on the rotor shaft; a water supply passage formed in the rotor shaft; a water conduit that guides water supplied to a central hole of the rotor through the water supply passage to an outlet on the outer circumferential surface of the rotor; and a spray nozzle that sprays the water guided to the outlet by the water conduit, wherein the spray direction of the spray nozzle is inclined circumferentially with respect to a direction parallel to the central axis of the rotor, and the rotor is rotated by the reaction of the spray while spraying water, A rotary nozzle device characterized in that a commutator that rectifies the flow of water flowing into the spray nozzle is provided upstream of the spray nozzle, and a rectifying pipe that equalizes the flow rate of the water flow is interposed between the outlet and the commutator.

2. 2. The rotary nozzle device according to claim 1, wherein the flow straightening pipe has a curved shape that tilts the jet direction of the jet nozzle radially relative to a direction parallel to the central axis of the rotor.

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