Snow melting nozzle

Abstract

This aims to stabilize the force of the snow-melting water ejected from the sprinkling grooves arranged on the circumference of the sprinkling element of the snow-melting nozzle. [Solution] The snow melting nozzle 1 comprises a nozzle upper part 2 into which a main sprinkler member 6 having numerous sprinkler channels 5 is fitted, a nozzle lower part 3 connected to a water conduit 11 through which snow melting water flows from underground, and a nozzle intermediate part 4 having a cavity 12 in which a cylindrical valve cylinder 14 stands upright. A female screw hole 13 is provided in the center of the bottom surface 12b connected to the smooth circumferential surface 12a of the cavity 12, and a male screw 13 on the lower end of the valve cylinder 14 is screwed into this female screw hole 13. Multiple outflow holes 16 are drilled in the valve cylinder 14 so as to be perpendicular to the axis of the through hole 15 of the valve cylinder 14 into which a rotary valve 17 for adjusting the discharge amount of snow melting water is fitted.

Description

Technical Field

[0001] The present invention relates to a snow melting nozzle buried in a road surface or a parking lot for melting snow accumulated on the road surface by spraying water.

Background Art

[0002] Conventionally, as a device buried in a road surface for the purpose of snow melting on roads, parking lots, etc., a water spray nozzle has a flow passage through which groundwater is supplied to the lower part, a valve mechanism is provided inside, a water spray passage that communicates with a cavity formed inside the nozzle body and opens on the upper surface of the nozzle body is drilled, and a structure has been proposed in which water is sprayed in four directions from the water spray passage to melt the snow on the road. (Patent Document 1)

[0003] Regarding such a snow melting nozzle, the water spray holes opening on the upper surface of the nozzle body determine the spray angle and spray direction of the water sprayed from the nozzle body depending on the angle of the water spray passage drilled in the nozzle body of the snow melting nozzle. In particular, if the hole of the valve for flow rate adjustment opens only on one side, the distance to the water spray passage arranged on the circumference of the water spray member becomes uneven, resulting in a difference when spraying, and in the shape where a partition wall is provided in the cavity, flowing water tends to remain in the cavity, the snow melting water sprayed from the water guide pipe to the water spray passage is blocked, the spray output of the snow melting water decreases, snow melting over a wide range cannot be ensured, and the stability of the momentum of the snow melting water spray cannot be achieved, causing problems.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0005] This invention was made in consideration of the above points, and aims to provide a snow-melting nozzle that can stabilize the force of snow-melting water ejection without reducing the flow velocity from the valve hole for adjusting the flow rate of the snow-melting nozzle to the watering groove arranged on the circumference of the watering member. [Means for solving the problem]

[0006] In order to solve the aforementioned problems and achieve the objective, this invention is configured as follows.

[0007] The invention described in claim 1 is a snow melting nozzle comprising a nozzle upper part into which a main sprinkler member having a number of sprinkler channels is fitted, a nozzle lower part connected to a water conduit through which snow melting water from underground flows, and a nozzle intermediate part having a cavity for which a cylindrical valve cylinder is erected, This snow melting nozzle is characterized by having a female screw hole in the center of the bottom surface which is connected to the smooth circumferential surface of the cavity, a male screw having been attached to the lower end of the valve cylinder being screwed into this female screw hole, and having a plurality of outflow holes opening in the valve cylinder that communicate perpendicular to the axis of the through hole of the valve cylinder into which a rotary valve for adjusting the discharge amount of snow melting water is fitted.

[0008] The invention described in claim 2 is a snow-melting nozzle according to claim 1, characterized in that a sub-spraying member that presses the main spraying member from above is divided from the upper end of the valve cylinder, a large-diameter fitting hole and a small-diameter fitting hole are drilled vertically in the center of the sub-spraying member, the large-diameter fitting hole is rotatably fitted to a flange protruding from the upper end of the valve cylinder, and the small-diameter fitting hole is rotatably fitted to the outer circumference of the valve cylinder below the flange.

[0009] The invention described in claim 3 is a snow-melting nozzle according to claim 2, characterized in that an inner projection is provided on the inner circumferential surface of the small-diameter fitting hole, a gap is provided between the inner circumferential surface of the small-diameter fitting hole and the outer circumferential surface of the valve cylinder, and an outer projection is provided on the outer circumferential surface of the valve cylinder located at the lower end of the auxiliary watering member, the height of the outer projection is set to be less than or equal to the diameter of the small-diameter fitting hole, the inner projection of the small-diameter fitting hole overcomes the outer projection of the valve cylinder to insert the auxiliary watering member into the tip of the valve cylinder, and the vertical movement of the auxiliary watering member is restricted by the flange and the outer projection. [Effects of the Invention]

[0010] With the above configuration, this invention has the following effects.

[0011] The invention described in claim 1 provides a snow-melting nozzle comprising a nozzle upper part into which a main sprinkler member having a plurality of sprinkler channels is fitted, a nozzle lower part connected to a water conduit through which snow-melting water flows from underground, and a nozzle middle part having a cavity for which a cylindrical valve cylinder stands upright, wherein a female screw hole is provided in the center of the bottom surface connected to the smooth circumferential surface of the cavity, a male screw having a screw at the lower end of the valve cylinder is screwed into this female screw hole, and a plurality of outflow holes are opened in the valve cylinder that communicate perpendicular to the axis of the through hole of the valve cylinder into which a rotary valve for adjusting the discharge amount of snow-melting water is fitted, so that the distance to the plurality of sprinkler channels arranged on the circumference of the main sprinkler member is substantially equal due to the plurality of outflow holes, there is no difference when snow-melting water is ejected from each of the sprinkler channels, and the ejection force of the snow-melting water can be stabilized. Moreover, since there are no partition walls within the cavity, the snow-melting water flowing out from the outlet holes is blocked and does not remain within the cavity, the spraying force of the snow-melting water ejected from the sprinkler channel does not decrease, snow-melting over a wide area can be ensured, and the flow rate of the snow-melting water flowing out through the multiple outlet holes is increased, allowing it to rise vigorously along the circumferential surface of the cavity.

[0012] In the invention described in claim 2, the auxiliary watering member that presses the main watering member from above and the upper end of the valve cylinder are separated, and a large-diameter fitting hole and a small-diameter fitting hole are drilled vertically in the center of the auxiliary watering member, and the large-diameter fitting hole is rotatably fitted to a flange protruding from the upper end of the valve cylinder, and the small-diameter fitting hole is rotatably fitted to the outer circumference of the valve cylinder below the flange. As a result, when the wheels turn due to the steering of the vehicle, only the auxiliary watering member that is stepped on by the wheels rotates, and the valve cylinder does not rotate, so that the screw at the lower end of the valve cylinder does not loosen, and if the valve cylinder does not rotate, the opening position of the outflow hole of the valve cylinder does not change, and it becomes unnecessary to adjust the snow melting nozzle that is placed on the road surface to set the optimal spraying state.

[0013] In the invention described in claim 3, an inner projection is provided on the inner circumferential surface of the small-diameter fitting hole, creating a gap between the inner circumferential surface of the small-diameter fitting hole and the outer circumferential surface of the valve cylinder, and an outer projection is provided on the outer circumferential surface of the valve cylinder located at the lower end of the auxiliary watering member, with the height of this outer projection being less than or equal to the diameter of the small-diameter fitting hole, the inner projection of the small-diameter fitting hole overcomes the outer projection of the valve cylinder, inserting the auxiliary watering member into the tip of the valve cylinder, and the vertical movement of the auxiliary watering member is restricted by the flange and the outer projection, so that there is no contact between the inner circumferential surfaces of the large-diameter fitting hole and the small-diameter fitting hole of the auxiliary watering member and the outer circumferential surface of the upper part of the valve cylinder due to the gap between the large-diameter fitting hole and the small-diameter fitting hole of the auxiliary watering member and the outer circumferential surface of the upper part of the valve cylinder, the valve cylinder does not rotate and the screw at the lower end of the valve cylinder does not loosen. Furthermore, when cleaning the sprinkler groove to remove debris such as pebbles, the auxiliary sprinkler member will not detach from the valve barrel and fall out, making it easy to repair clogging of the sprinkler member and clean the inside of the sprinkler nozzle. In addition, the auxiliary sprinkler member will not fall out when screwing the valve barrel, making it easier to attach the main sprinkler member, which has been removed to remove the cause of clogging in the sprinkler groove or to clean the inside of the sprinkler nozzle, to the sprinkler nozzle. Moreover, the small diameter fitting hole of the auxiliary sprinkler member can easily overcome the outer projection of the valve barrel and be inserted into the tip of the valve barrel. [Brief explanation of the drawing]

[0014] [Figure 1] Vertical cross-sectional view of the snow melting nozzle according to the first embodiment of the present invention. [Figure 2] Cross-sectional view taken along line A-A in FIG. 1. [Figure 3] Enlarged cross-sectional view of the upper part of the nozzle of the snow melting nozzle according to the present invention [Figure 4] Partial vertical cross-sectional view of the snow melting nozzle according to the second embodiment of the present invention. [Figure 5] Cross-sectional view taken along line B-B in FIG. 4.

Embodiments for Carrying Out the Invention

[0015] Hereinafter, embodiments of the snow melting nozzle according to the present invention will be described. The embodiments of the present invention show the most preferred forms of the invention, and the present invention is not limited thereto.

[0016] The first embodiment of the present invention will be described based on FIGS. 1, 2 and 3. FIG. 1 shows the entire snow melting nozzle 1.

[0017] This snow melting nozzle 1 is embedded in a concrete block, and is arranged such that the upper surface of the sprinkler nozzle 1 exposed on the road surface GL is substantially flush with the road surface GL.

[0018] The sprinkler nozzle 1 is made of cast iron or stainless steel, and includes a nozzle upper part 2, a nozzle lower part 3, and a nozzle intermediate part 4 interposed between the nozzle upper part 2 and the nozzle lower part 3.

[0019] A main sprinkler member 6 having a groove-shaped sprinkler passage 5 is fitted into the nozzle upper part 2, and a sub-sprinkler member 7 is placed so as to press the main sprinkler member 6 from above, and the groove-shaped sprinkler passage 5 is covered by the outer periphery of the sub-sprinkler member 7. Note that the sprinkler passage 5 may be formed with circular holes instead of the groove shape.

[0020] The outer periphery of the main water sprinkling member 6 and the upper part 2 of the nozzle are engaged by the concave and convex engaging means 10 to restrict the rotation of the main water sprinkling member 6. Moreover, by changing the positions of the concavities and convexities of the engaging means 10, the water sprinkling direction from the water sprinkling groove 5 is set.

[0021] A water conduit 11 through which the snow-melting water flows from underground is connected to the lower part 3 of the nozzle, and a seal ring (not shown) is attached to the outer periphery of the water conduit 11 to prevent the leakage of the snow-melting water.

[0022] The middle part 4 of the nozzle is formed of a bowl-shaped cavity 12. The bottom continuous with the peripheral surface 12a of the cavity 12 is cut to form a flat bottom surface 12b, and a female screw hole 13 is provided at the center of the flat bottom surface 12b.

[0023] The male screw 14a at the lower end of a cylindrical valve barrel 14 is screwed into the female screw hole 13, and the cylindrical valve barrel 14 stands upright in the cavity 12 of the middle part 4 of the nozzle. The valve barrel 14 is divided from the auxiliary water sprinkling member 7, and a large-diameter fitting hole 8 and a small-diameter fitting hole 9 are bored vertically in the center of the auxiliary water sprinkling member 7.

[0024] A flange 14b is provided at the upper end of the valve barrel 14, and the large-diameter fitting hole 8 of the auxiliary water sprinkling member 7 is fitted to the flange 14b. The small-diameter fitting hole 9 is fitted to the outer periphery of the valve barrel 14 below the flange 14b, making the auxiliary water sprinkling member 7 rotatable about the upper end of the valve barrel 14. Note that the reference numeral 14d is a plug that is removably fitted into the depression of the flange 14b.

[0025] An inner protrusion 9a is provided on the inner peripheral surface of the small-diameter fitting hole 9 below the large-diameter fitting hole 8. An outer protrusion 14b is provided on the outer peripheral surface of the valve barrel 14 located at the lower end of the auxiliary water sprinkling member 6 and below the flange 14a. The vertical movement of the auxiliary water sprinkling member 6 is restricted by the outer protrusion 14b and the flange 14a. Note that the height of the outer protrusion 14b is made equal to or less than the aperture diameter of the small-diameter fitting hole 9.

[0026] The inner projection 9a of the small-diameter fitting hole 9 of the auxiliary watering member 7 is forced to overcome the outer projection 14b of the valve cylinder 14 and is inserted into the upper end of the valve cylinder 14, thereby preventing the auxiliary watering member 7 from moving downward.

[0027] A gap 9b is provided between the outer circumferential surface of the valve cylinder 14 and the inner circumferential surface of the small-diameter fitting hole 9, there is no contact between the outer circumferential surface of the valve cylinder 14 and the inner circumferential surface of the small-diameter fitting hole 9, and even if the wheel is steered while the auxiliary watering member 7 is run over by the wheel, only the auxiliary watering member 7 rotates and the valve cylinder 14 does not rotate along with it, and the male screw 14a at the lower end of the valve cylinder 14 that screws into the female screw hole 13 does not easily loosen.

[0028] A through-hole 15 is drilled in the valve cylinder 14 through which snow-melting water from the water conduit 11 flows, and a rotary valve 17 is fitted into this through-hole 15 to adjust the flow rate of snow-melting water discharged into the cavity 12 of the nozzle intermediate section 4.

[0029] Outlet holes 16, which communicate perpendicularly to the axis of the through-hole 15, penetrate the valve cylinder 14 radially and open on both the left and right sides. Valve holes 17a of the rotary valve 17 face the outlet holes 16, and these valve holes 17a adjust the discharge amount of snow-melting water by partially opening each of the outlet holes 16.

[0030] Furthermore, by screwing the lower end of the valve cylinder 14 into the screw hole 13 so that each of the outlet holes 16 is positioned at the flat bottom surface 10b of the cavity 10, the snow-melting water discharged from the outlet holes 16 toward the flat bottom surface 10b swirls upward along the circumferential surface 12a of the cavity 10 and flows into the sprinkler channel 5.

[0031] A constriction 20 with a smaller diameter than the through-hole 15 is formed at the lower end of the through-hole 15 downstream of the outflow hole 16. This constriction 20 increases the flow velocity of the snowmelt water from the water conduit 11, causing the snowmelt water to be discharged from the outflow hole 16.

[0032] The upper end of the rotary valve 17 has a slotted groove 17b into which a tool such as a screwdriver is inserted. The plug 14c that fits into the flange is removed, and the slotted groove 17b is operated with the tool to rotate the rotary valve 17.

[0033] The tip of a regulating pin 18, which prevents the rotary valve 17 from coming loose, is inserted into the annular groove 17c of the rotary valve 15 within the valve cylinder 14. O-rings 19 are interposed above and below the annular groove 17c to prevent snowmelt water from leaking through the gap between the valve cylinder 14 and the rotary valve 17.

[0034] Furthermore, a second embodiment will be described with reference to Figures 4 and 5. In this embodiment, components identical to those in the first embodiment are denoted by the same reference numerals.

[0035] In this embodiment, the diameter of the outflow hole 16 is reduced, but the outflow hole 16 is opened in four directions at 90-degree intervals on the circumference of the valve cylinder 14, and the valve holes 17a of the rotary valve 17 that fits into the through hole 15 are also located in four directions facing the outflow hole 16.

[0036] When the outlet holes 16 are opened in four directions at 90-degree intervals around the circumference of the valve cylinder 14, the swirling flow of snow-melting water discharged in the direction of arrow α in Figure 5 tends to become stronger, increasing the force of the jets from the sprinkler channel 5.

[0037] In the first and second embodiments, when adjusting the discharge amount from the watering nozzle 1, the plug 14c is removed and the negative groove 17b at the upper end of the rotary valve 17 is rotated with a tool so that the valve holes 17a of the rotary valve 17 partially open each of the outflow holes 16.

[0038] The snow-melting water discharged from the outlet hole 16, which is partially opened by the rotary valve 17, toward the flat bottom surface 12b of the cavity 12, is tilted in the direction shown by arrow α in Figure 2 or Figure 5. This water then strikes the circumferential surface 12a of the cavity 12, rises while swirling along this circumferential surface 12a, and flows into the sprinkler channel 5.

[0039] The distance from the multiple outlet holes 16 to the sprinkler channels 5 arranged on the circumference of the main sprinkler member 6 is approximately equal, and there is no difference when the snowmelt water is ejected from each of the sprinkler channels 5. This ensures that the force of the snowmelt water ejected from each outlet hole 16 is stable.

[0040] In the above configuration, the snow melting nozzle 1 comprises the upper nozzle 2 into which the main watering member 6 having a number of watering channels 5 is fitted, the lower nozzle 3 connected to the watering pipe 11 through which snow melting water flows from underground, and the intermediate nozzle 4 having the cavity 12 upright for the cylindrical valve cylinder 14, wherein the female screw hole 13 is provided in the center of the bottom surface 12b connected to the smooth circumferential surface 12a of the cavity 12, and the lower end of the valve cylinder 14 is connected to this female screw hole 13. Multiple outlet holes 16 are opened in the valve cylinder 14, which is fitted with a rotary valve 17 that adjusts the discharge amount of snowmelt water by screwing in a male screw 14a to the valve cylinder 14, communicating perpendicular to the axis of the through hole 15 of the valve cylinder 14. As a result, the distance to the numerous sprinkler channels 5 arranged on the circumference of the main sprinkler member 6 is made approximately equal by the multiple outlet holes 16, so that there is no difference when snowmelt water is ejected from each of the sprinkler channels 5, and the ejection force of the snowmelt water can be stabilized. Moreover, since there is no partition wall in the cavity 12, the snowmelt water that flows out from the outlet holes 16 is blocked and does not remain in the cavity 12, the ejection force of the snowmelt water ejected from the sprinkler channels 5 does not decrease, snowmelt over a wide area can be ensured, and the flow velocity of the snowmelt water flowing out through the multiple outlet holes 16 does not decrease, allowing it to rise vigorously along the circumferential surface 12a of the cavity 12.

[0041] Furthermore, the auxiliary watering member 7 that presses the main watering member 6 from above is separated from the upper end of the valve cylinder 14, and a large-diameter fitting hole 8 and a small-diameter fitting hole 9 are drilled vertically in the center of the auxiliary watering member 7, and the large-diameter fitting hole 8 is rotatably fitted to the flange 14a that protrudes from the upper end of the valve cylinder 14, and the small-diameter fitting hole 9 is rotatably fitted to the outer circumference of the valve cylinder 14 below the flange 14a, so that even if the wheel is steered, only the auxiliary watering member 7 rotates on the auxiliary watering member 7 that is run over by the wheel, and the valve cylinder 14 does not rotate, and the male thread 14a of the valve cylinder 14 does not loosen from the female thread hole 13. Moreover, if the valve cylinder 14 does not rotate, the opening position of the outflow hole 16 of the valve cylinder 14 does not change, and the snow melting nozzle 1, which is placed on the road surface GL set to the optimal spraying state, can be maintained in its current state without adjustment.

[0042] Furthermore, an inner projection 9a is provided on the inner circumferential surface of the small-diameter fitting hole 9, creating a gap between the small-diameter fitting hole 9 and the outer circumferential surface of the valve cylinder 14, and an outer projection 14a is provided on the outer circumferential surface of the valve cylinder 14 located at the lower end of the auxiliary watering member 7, with the height of this outer projection 14a being less than or equal to the diameter of the small-diameter fitting hole 9, so that the inner projection 9a of the small-diameter fitting hole 9 overcomes the outer projection 14a of the valve cylinder 14, and the auxiliary watering member 7 is inserted into the tip of the valve cylinder 14, and the flange The vertical movement of the auxiliary watering member 7 is restricted by the 14a and the outer projection 14a, so that the gap between the outer circumference of the valve cylinder 14 and the inner circumference of the small-diameter fitting hole 9 prevents contact between the inner circumference of the large-diameter fitting hole 8 and the small-diameter fitting hole 9 of the auxiliary watering member 7 and the outer circumference of the upper part of the valve cylinder 14. This makes it easier for the auxiliary watering member 7 to rotate when the wheels are operated by steering the vehicle, and prevents the lower end of the valve cylinder 14, which is screwed into the screw hole 13 of the bottom surface 12b of the cavity 12, from loosening.

[0043] Furthermore, when cleaning the sprinkler channel 5 to remove debris such as pebbles, even if the lower end of the valve cylinder 14 is loosened and the valve cylinder 14 is lifted, the auxiliary sprinkler member 7 will not detach from the valve cylinder 14 and fall and get lost. This makes it easy to repair blockages in the sprinkler channel 5 and clean the inside of the snow-melting nozzle 1, and also makes it easier for the small-diameter fitting hole 9 of the auxiliary sprinkler member 7 to overcome the outer peripheral projection 14b of the valve cylinder 14 and be inserted into the tip of the valve cylinder 14. [Industrial applicability]

[0044] This invention provides a snow-melting nozzle that stabilizes the force of snow-melting water ejected from a plurality of sprinkling channels arranged on the circumference of the sprinkling member of the snow-melting nozzle. [Explanation of Symbols]

[0045] 1 Snow melting nozzle 2. Top of nozzle 3. Lower part of the nozzle 4. Nozzle middle section 5 Sprinkler channels 6. Main watering component 7. Auxiliary watering component 8 Large diameter fitting holes 9 Small diameter fitting holes 9a Medial protrusion 9b Gap 10 Engagement means 11 Water conduit 12 Cavity 12a Circumferential surface 12b Bottom 13 Female screw holes 14 Valve cylinder 14a Male screw 14b Flange 14c Lateral process 14d plug 15 Through holes 16 Outflow hole 17 Rotary valve 17a Valve hole 17b Negative groove 17c Ring groove 18 Regulator pins 19 O-rings 20 aperture GL road surface

Claims

1. A snow melting nozzle comprising an upper nozzle section into which an annular main sprinkler member having numerous sprinkler channels is fitted, a lower nozzle section connected to a water conduit through which snow melting water flows from underground, and an intermediate nozzle section having a cavity for which a cylindrical valve cylinder stands upright, A snow melting nozzle characterized by having a female screw hole in the center of the bottom surface which is connected to the smooth circumferential surface of the cavity, a male screw having been attached to the lower end of the valve cylinder being screwed into this female screw hole, and having a plurality of outlet holes opening in the valve cylinder that communicate perpendicular to the axis of the through hole of the valve cylinder into which a rotary valve for adjusting the discharge amount of snow melting water is fitted.

2. The snow melting nozzle according to claim 1, characterized in that a sub-spraying member that presses the main spraying member from above is separated from the upper end of the valve cylinder, a large-diameter fitting hole and a small-diameter fitting hole are drilled vertically in the center of the sub-spraying member, the large-diameter fitting hole is rotatably fitted to a flange protruding from the upper end of the valve cylinder, and the small-diameter fitting hole is rotatably fitted to the outer circumference of the valve cylinder below the flange.

3. The snow-melting nozzle according to claim 2, characterized in that an inner projection is provided on the inner circumferential surface of the small-diameter fitting hole, a gap is provided between the inner circumferential surface of the small-diameter fitting hole and the outer circumferential surface of the valve cylinder, and an outer projection is provided on the outer circumferential surface of the valve cylinder located at the lower end of the auxiliary water-spraying member, the height of the outer projection is set to be less than or equal to the diameter of the small-diameter fitting hole, the inner projection of the small-diameter fitting hole overcomes the outer projection of the valve cylinder to insert the auxiliary water-spraying member into the tip of the valve cylinder, and the vertical movement of the auxiliary water-spraying member is restricted by the flange and the outer projection.

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