Snow melting nozzle

Abstract

This aims to stabilize the force of the snow-melting water sprayed from the sprinkler grooves arranged on the circumference of the snow-melting nozzle's sprinkler member. [Solution] A snow melting nozzle (1) comprising an upper nozzle part (2) fitted with a main sprinkler member (6) having numerous sprinkler channels (5), a lower nozzle part (3) connected to a water conduit (11) through which snow melting water flows from underground, and a nozzle middle part (4) having a cavity (12) from which a cylindrical valve cylinder (14) stands; a female threaded hole (13) is provided in the center of a bottom surface (12b) connected to the smooth peripheral surface (12a) of the cavity (12), and a male screw (13) at the lower end of the valve cylinder (14) is threaded into this female threaded hole (13); and a plurality of outlet holes (16) are drilled in the valve cylinder (14) that communicate perpendicular to the axis of a through hole (15) of the valve cylinder (14) into which a rotary valve (17) is fitted to adjust the discharge amount of snow melting water.

Description

[Technical Field]

[0001] This invention relates to a snow melting nozzle that is buried in the road surface or parking lot to melt snow that has accumulated on the road surface by spraying water. [Background technology]

[0002] Conventionally, a proposed structure for a sprinkler nozzle buried in the road surface of a road or parking lot for the purpose of melting snow has been proposed, which has a flow passage at the bottom through which groundwater is supplied, an internal valve mechanism, a sprinkler channel drilled into the nozzle body that communicates with a hollow portion formed inside the nozzle body and opens onto the top surface of the nozzle body, and sprays water in all directions from the sprinkler channel to melt snow on the road (Patent Document 1).

[0003] In such snow melting nozzles, the spray angle and direction of the water sprayed from the nozzle body are determined by the angle of the spray channels drilled into the nozzle body of the snow melting nozzle.In particular, if the flow rate adjusting valve holes are open on only one side, the distance to the spray channels arranged on the circumference of the spray member will be uneven, resulting in differences in the amount of water sprayed.Furthermore, if a partition wall is installed within a cavity, flowing water is likely to remain within the cavity, blocking the snow melting water spraying from the sprinkler channels via the water conduit, reducing the spray force of the snow melting water.This makes it impossible to melt snow over a wide area and makes it impossible to stabilize the force of the snow melting water spray. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-247584 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] This invention was made in consideration of the above points, and its object is to provide a snow melting nozzle that can stabilize the force of the snow melting water spray without reducing the flow rate from the valve hole that adjusts the flow rate of the snow melting nozzle to the sprinkler grooves located on the circumference of the sprinkler member. [Means for solving the problem]

[0006] In order to solve the above problems and achieve the object, the present invention is configured as follows.

[0007] The invention described in claim 1 is a snow melting nozzle comprising an upper nozzle part to which a main sprinkler member having a number of sprinkler grooves is fitted, a lower nozzle part to which a water pipe through which snow melting water flows from underground is connected, and a nozzle middle part having a cavity with a cylindrical valve cylinder erected therein, A female screw hole is drilled in the center of the bottom surface that is connected to the smooth peripheral surface of the cavity, and a male screw provided at the lower end of the valve cylinder is screwed into this female screw hole, separating the auxiliary sprinkler member that covers the upper part of the sprinkler groove from the upper end of the valve cylinder, A large diameter fitting hole and a small diameter fitting hole are formed in the center of the auxiliary sprinkler member, a flange provided at the upper end of the valve cylinder is fitted into the large diameter fitting hole, an inner peripheral protrusion is provided on the inner wall surface of the small diameter fitting hole below the large diameter fitting hole, and the auxiliary sprinkler member is rotatably fitted to the upper end of the valve cylinder with a gap between the small diameter fitting hole and the outer periphery of the valve cylinder, This snow melting nozzle is characterized in that the valve cylinder has a plurality of outlet holes that communicate perpendicular to the axis of the through hole of the valve cylinder into which a rotary valve that adjusts the amount of snow melting water discharged is inserted.

[0008] The invention described in claim 2 is This is a snow-melting nozzle as described in claim 1, characterized in that an outer peripheral protrusion is provided on the outer periphery of the valve cylinder located at the lower end of the secondary sprinkler member, the height of this outer peripheral protrusion is less than the diameter of the small diameter fitting hole, and the flange and the outer peripheral protrusion regulate the up and down movement of the secondary sprinkler member. [Effects of the Invention]

[0010] With the above-described configuration, the present invention has the following effects.

[0011] In the invention described in claim 1, the snow melting nozzle is comprised of an upper nozzle part into which a main sprinkler member having a number of sprinkler grooves is fitted, a lower nozzle part which is connected to a water pipe through which snow melting water flows from underground, and a nozzle middle part which has a cavity with a cylindrical valve cylinder erected therein, A female screw hole is drilled in the center of the bottom surface that is connected to the smooth peripheral surface of the cavity, and a male screw provided at the lower end of the valve cylinder is screwed into this female screw hole, separating the auxiliary sprinkler member that covers the upper part of the sprinkler groove from the upper end of the valve cylinder, A large diameter fitting hole and a small diameter fitting hole are formed in the center of the auxiliary sprinkler member, a flange provided at the upper end of the valve cylinder is fitted into the large diameter fitting hole, an inner peripheral protrusion is provided on the inner wall surface of the small diameter fitting hole below the large diameter fitting hole, and the auxiliary sprinkler member is rotatably fitted to the upper end of the valve cylinder with a gap between the small diameter fitting hole and the outer periphery of the valve cylinder,A rotary valve that adjusts the amount of snow melting water discharged is fitted into the valve cylinder, and multiple outlet holes that communicate perpendicular to the axis of the through hole of the valve cylinder are opened in the valve cylinder.This makes the distances to the numerous sprinkler grooves arranged on the circumference of the main sprinkler member approximately equal due to the multiple outlet holes, so there is no difference in the amount of snow melting water sprayed from each sprinkler groove, and the spraying force of the snow melting water can be stabilized. Furthermore, since there is no partition wall 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 sprayed out from the sprinkler groove does not decrease, snow melting can be ensured over a wide area, the flow speed of the snow melting water flowing out from the multiple outlet holes does not decrease, and it can be raised vigorously along the circumferential surface of the cavity.In addition, by fitting the secondary sprinkler member to the upper end of the valve cylinder so that it can be rotated freely, when the wheels turn due to steering of the vehicle, only the secondary sprinkler member stepped on by the wheel rotates, and the valve cylinder does not rotate, and the screw at the lower end of the screw-engaged valve cylinder does not loosen.

[0012] Also, A large diameter fitting hole and a small diameter fitting hole are formed in the center of the auxiliary sprinkler member, a flange provided at the upper end of the valve cylinder is fitted into the large diameter fitting hole, an inner peripheral protrusion is provided on the inner wall surface of the small diameter fitting hole below the large diameter fitting hole, and a gap is formed between the small diameter fitting hole and the outer periphery of the valve cylinder. The auxiliary sprinkler member is rotatably fitted to the upper end of the valve cylinder. Therefore, when the wheels turn due to vehicle steering, the secondary sprinkler member rotates when stepped on by the wheels, without frictional contact with the outer periphery of the flange, allowing the valve cylinder to rotate smoothly and preventing the screw at the lower end of the valve cylinder from loosening.

[0013] The invention described in claim 2 In the above, an outer peripheral protrusion is provided on the outer periphery of the valve cylinder located at the lower end of the auxiliary water sprinkler member, and the height of this outer peripheral protrusion is The aforementionedSince the diameter of the small-diameter fitting hole is smaller than that of the small-diameter fitting hole, and the flange and the outer peripheral protrusion restrict the up and down movement of the secondary sprinkler member, even if the screwing is loosened and the valve cylinder is lifted during cleaning work to remove pebbles and other debris from the sprinkler grooves, the secondary sprinkler member will not come out of the valve cylinder and fall and be lost, making it easy to repair clogged sprinkler members and clean the inside of the sprinkler nozzle. Furthermore, since the secondary sprinkler member will not fall off when the valve cylinder is screwed together, it is easy to remove the cause of clogged sprinkler grooves and to attach the main sprinkler member that has been removed to the sprinkler nozzle body to the sprinkler nozzle, and the small-diameter fitting hole of the secondary sprinkler member can easily overcome the outer peripheral protrusion of the valve cylinder and be inserted into the tip of the valve cylinder. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a longitudinal cross-sectional view of a snow melting nozzle according to a first embodiment of the present invention. [Figure 2] Cross-sectional view taken along line AA in Figure 1. [Figure 3] An enlarged cross-sectional view of the upper part of the snow melting nozzle in this invention. [Figure 4] FIG. 4 is a partial vertical cross-sectional view of a snow melting nozzle according to a second embodiment of the present invention. [Figure 5] 5 is a cross-sectional view taken along line BB in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0015] The following describes embodiments of the snow melting nozzle of the present invention. The embodiments of the present invention show the most preferred modes of the invention, and the present invention is not limited to these.

[0016] A first embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG. 1 shows the entire snow melting nozzle 1. FIG.

[0017] This snow melting nozzle 1 is embedded in a concrete block and is arranged so that the upper surface of the sprinkler nozzle 1 exposed to 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 comprises an upper nozzle section 2, a lower nozzle section 3, and an intermediate nozzle section 4 interposed between the upper nozzle section 2 and the lower nozzle section 3.

[0019] A main sprinkler member 6 having groove-shaped sprinkler channels 5 is fitted into the nozzle upper portion 2, and a secondary sprinkler member 7 is placed on the main sprinkler member 6 so as to press from above, with the outer periphery of the secondary sprinkler member 7 covering the groove-shaped sprinkler channels 5. Note that the sprinkler channels 5 may not be groove-shaped, but may instead be formed by drilling circular holes.

[0020] The outer periphery of the main sprinkler member 6 and the upper nozzle part 2 are fitted with a concave-convex engaging means 10 to restrict the rotation of the main sprinkler member 6, and the direction of sprinkling water from the sprinkler groove 5 can be set by changing the position of the concave-convex of the engaging means 10.

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

[0022] The nozzle intermediate portion 4 comprises a bowl-shaped cavity 12, the bottom of which is continuous with the peripheral surface 12a of the cavity 12, being cut to form a flat bottom surface 12b, and a female screw hole 13 is provided in the center of the flat bottom surface 12b.

[0023] The male screw 14a at the lower end of the cylindrical valve cylinder 14 is screwed into the female screw hole 13, and the cylindrical valve cylinder 14 stands up in the cavity 12 of the nozzle middle part 4. The valve cylinder 14 is separated from the secondary sprinkler member 7, and a large diameter fitting hole 8 and a small diameter fitting hole 9 are drilled at the top and bottom of the center of the secondary sprinkler member 7.

[0024] A flange 14b is provided at the upper end of the valve cylinder 14, and the large diameter fitting hole 8 of the auxiliary sprinkler member 7 fits into this flange 14b, and the small diameter fitting hole 9 fits into the outer periphery of the valve cylinder 14 below the flange 14b, making the auxiliary sprinkler member 7 rotatable at the upper end of the valve cylinder 14. Note that reference numeral 14d denotes a plug that is detachably fitted into a recess in 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. In addition, an outer protrusion 14b is provided at the lower end of the auxiliary watering member 6 on the outer peripheral surface of the valve cylinder 14 below the flange 14a, and this outer protrusion 14b and the flange 14a regulate the up and down movement of the auxiliary watering member 6. The height of the outer protrusion 14b is set to be equal to or less than the diameter of the small diameter fitting hole 9.

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

[0027] There is a gap 9b between the outer surface of the valve cylinder 14 and the inner surface of the small diameter fitting hole 9, and there is no contact between the outer surface of the valve cylinder 14 and the inner surface of the small diameter fitting hole 9.When the secondary sprinkler member 7 is stepped on by the wheel and the wheel is steered, only the secondary sprinkler 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, which 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 the 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 the snow melting water discharged into the cavity 12 of the nozzle intermediate part 4.

[0029] Outlet holes 16, which are connected perpendicular to the axis of the through-holes 15, penetrate the valve cylinder 14 in the radial direction and open to both the left and right sides. The outlet holes 16 are opposed to valve holes 17a in the rotary valve 17, and these valve holes 17a allow each of the outlet holes 16 to be partially open, thereby adjusting the amount of snow-melting water discharged.

[0030] In addition, by screwing the lower end of the valve cylinder 14 into the screw hole 13 so that each of the outflow holes 16 is positioned on the flat bottom surface 10b of the cavity 10, the snow-melting water discharged from the outflow holes 16 is directed toward the flat bottom surface 10b, and then swirls and rises along the peripheral surface 12a of the cavity 10 and flows into the sprinkler channel 5.

[0031] A throttle 20 having 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, and this throttle portion 20 increases the flow rate of the snow melting water from the water conduit 11, causing the snow melting water to be discharged from the outflow hole 16.

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

[0033] The tip of a regulating pin 18 that prevents the rotary valve 17 from coming loose is inserted into an annular groove 17c of the rotary valve 15 in the valve cylinder 14, and O-rings 19 are placed above and below the annular groove 17c to prevent snow melting water from leaking from the gap between the valve cylinder 14 and the rotary valve 17.

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

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

[0036] If 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 ejected in the direction of arrow α in Figure 5 tends to become stronger, increasing the force of the water spraying from the sprinkler channel 5.

[0037] In the first and second embodiments, when adjusting the discharge volume from the sprinkler nozzle 1, the plug 14c is removed and the minus groove 17b at the upper end of the rotary valve 17 is rotated with a tool, so that each of the outlet holes 16 is partially opened by the valve holes 17a of the rotary valve 17.

[0038] The snow-melting water that is 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 will tilt in the direction shown by arrow α in Figure 2 or Figure 5, and will hit the peripheral surface 12a of the cavity 12, then rotate along this peripheral surface 12a and rise, before flowing into the sprinkler channel 5.

[0039] The distances from the multiple outlet holes 16 to the sprinkler channels 5 arranged on the circumference of the main sprinkler member 6 are approximately uniform, so there is no difference in the amount of snow sprayed from each sprinkler channel 5, and the snow-melting water discharged from each outlet hole 16 can stabilize the force of the snow-melting water spraying from the sprinkler channels 5.

[0040] In the above configuration, the snow melting nozzle 1 comprises the nozzle upper part 2 into which the main sprinkler member 6 having a large number of the sprinkler channels 5 is fitted, the nozzle lower part 3 which connects the water conduit 11 through which snow melting water flows from underground, and the nozzle middle part 4 which has the cavity 12 from which the cylindrical valve cylinder 14 stands, and the female screw hole 13 is provided in the center of the bottom surface 12b which is continuous with the smooth peripheral surface 12a of the cavity 12, and the lower end of the valve cylinder 14 is inserted into this female screw hole 13. The rotary valve 17, which adjusts the discharge rate of snow melting water, is fitted into the valve cylinder 14 through the outlet 15 of the valve cylinder 14, and the valve cylinder 14 is provided with a male thread 14a that is threaded thereon, and a plurality of outlet holes 16 that communicate perpendicular to the axis of the through hole 15 of the valve cylinder 14 are opened in the valve cylinder 14. Therefore, the distances to the many sprinkler channels 5 arranged on the circumference of the main sprinkler member 6 are approximately equalized by the plurality of outlet holes 16, and there is no difference in the amount of snow melting water that sprays from each of the sprinkler channels 5, thereby stabilizing the spraying power of the snow melting water. Furthermore, since there is no partition wall within the cavity 12, the snow melting water that flows out from the outlet holes 16 is blocked and does not remain within the cavity 12, so the spraying power of the snow melting water from the sprinkler channels 5 does not decrease, ensuring snow melting over a wide area, and the flow rate of the snow melting water flowing out from the plurality of outlet holes 16 does not decrease, allowing it to rise vigorously along the circumferential surface 12a of the cavity 12.

[0041] Furthermore, the auxiliary sprinkler member 7, which presses against the main sprinkler member 6 from above, and the upper end of the valve cylinder 14 are separated, and the large-diameter fitting hole 8 and the small-diameter fitting hole 9 are drilled vertically in the center of the auxiliary sprinkler member 7. The large-diameter fitting hole 8 is rotatably fitted into the flange 14a protruding from the upper end of the valve cylinder 14, and the small-diameter fitting hole 9 is rotatably fitted into the outer periphery of the valve cylinder 14 below the flange 14a. By doing so, even when the wheel is steered, with the auxiliary sprinkler member 7 stepped on by the wheel, only the auxiliary sprinkler member 7 rotates, and the valve cylinder 14 does not rotate, so the male thread 14a of the valve cylinder 14 does not loosen from the female thread hole 13. Furthermore, if the valve cylinder 14 does not rotate, the opening position of the outlet hole 16 of the valve cylinder 14 does not change, and the snow melting nozzle 1, which is set to the optimal spray state and is placed on the road surface GL, can be maintained as it is without adjustment.

[0042] Further, an inner protrusion 9a is provided on the inner peripheral surface of the small diameter fitting hole 9, and a gap is formed between the small diameter fitting hole 9 and the outer peripheral surface of the valve cylinder 14. The outer protrusion 14a is provided on the outer peripheral surface of the valve cylinder 14 located at the lower end of the auxiliary water sprinkler member 7, and the height of this outer protrusion 14a is set to be equal to or less than the hole diameter of the small diameter fitting hole 9. The inner protrusion 9a of the small diameter fitting hole 9 overcomes the outer protrusion 14a of the valve cylinder 14, and the auxiliary water sprinkler member 7 is inserted into the tip of the valve cylinder 14, and the flange The up and down movement of the auxiliary sprinkler member 7 is regulated by the outer rib 14a and the outer protrusion 14a, so that due to the gap between the outer periphery of the valve cylinder 14 and the inner periphery of the small diameter fitting hole 9, there is no contact between the inner periphery of the large diameter fitting hole 8 and the small diameter fitting hole 9 of the auxiliary sprinkler member 7 and the outer periphery of the upper part of the valve cylinder 14, making it easier for the auxiliary sprinkler member 7 to rotate when the wheels are operated by steering the vehicle, and the lower end of the valve cylinder 14, which screws into the screw hole 13 on the bottom surface 12b of the cavity 12, does not loosen.

[0043] Furthermore, when performing cleaning work to remove debris such as pebbles that have gotten into the sprinkler groove 5, even if the screw at the bottom end of the valve cylinder 14 is loosened and the valve cylinder 14 is lifted, the secondary sprinkler member 7 will not come out of the valve cylinder 14 and fall and be lost, making it easy to repair clogged sprinkler grooves 5 and clean the inside of the snow melting nozzle 1, and the small diameter fitting hole 9 of the secondary sprinkler member 7 can easily pass over the outer peripheral protrusion 14b of the valve cylinder 14 and be inserted into the tip of the valve cylinder 14. [Industrial Applicability]

[0044] The present invention provides a snow-melting nozzle that stabilizes the force of the spray of snow-melting water from a number of sprinkler channels arranged around the circumference of the sprinkler member of the snow-melting nozzle. [Explanation of symbols]

[0045] 1 Snow melting nozzle 2 Top of the nozzle 3 Bottom of nozzle 4. Nozzle middle section 5 Sprinkler Channel 6 Main sprinkler element 7. Secondary sprinkler element 8 Large diameter fitting hole 9 Small diameter fitting hole 9a Medial protrusion 9b Gap 10 Engagement means 11 Water pipe 12 Cavity 12a Circumferential surface 12b Bottom 13 Female screw hole 14 Valve cylinder 14a male thread 14b flange 14c Lateral process 14d plug 15 through holes 16 Outflow hole 17 Rotary valve 17a Valve hole 17b minus groove 17c Circular groove 18 Regulatory pin 19 O-ring 20 apertures GL road surface

Claims

1. A snow melting nozzle is comprised of an upper nozzle section into which a main sprinkler member having a number of sprinkler grooves is fitted, a lower nozzle section connected to a water pipe through which snow melting water flows from underground, and a nozzle middle section having a cavity with a cylindrical valve cylinder erected therein. A snow melting nozzle characterized in that a female threaded hole is drilled in the center of the bottom surface connected to the smooth peripheral surface of the cavity, a male thread at the lower end of the valve cylinder is screwed into this female threaded hole, a secondary sprinkler member covering the top of the sprinkler groove and the upper end of the valve cylinder are separated, a large diameter fitting hole and a small diameter fitting hole are formed in the center of the secondary sprinkler member, a flange at the upper end of the valve cylinder is fitted into the large diameter fitting hole, an inner peripheral protrusion is provided on the inner wall surface of the small diameter fitting hole below the large diameter fitting hole, the secondary sprinkler member is rotatably fitted to the upper end of the valve cylinder with a gap between the small diameter fitting hole and the outer periphery of the valve cylinder, and a plurality of outlet 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 that adjusts the amount of snow melting water discharged is fitted.

2. A snow-melting nozzle as described in Claim 1, characterized in that an outer peripheral protrusion is provided on the outer periphery of the valve cylinder located at the lower end of the secondary sprinkler member, the height of this outer peripheral protrusion is made less than the diameter of the small diameter fitting hole, and the flange and the outer peripheral protrusion regulate the up and down movement of the secondary sprinkler member.

Images