JPH0243497Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to a water sprinkling nozzle used for dissolving snow by sprinkling groundwater onto a road surface, and particularly relates to a water sprinkling nozzle with a small sprinkling angle.

[Prior Art] A water spray nozzle disclosed in Japanese Utility Model Application Laid-Open No. 15355/1983 is known as a conventional spray nozzle of this type. As shown in FIG. 3, this water spray nozzle has a water volume adjustment knob 4 screwed into the center of the nozzle head 1, which has a driver groove 2 on the upper surface and a male and female part 3 on the circumference. A concave groove 5 is provided on the upper surface to form a water spray nozzle hole 6 with a small elevation angle. 7 is a water storage pipe forming a cavity 8 communicating with the water nozzle hole 6; 9 is a water passage portion; 10
is a water pipe.

Therefore, in this known snow melting nozzle, the water pipe 10
When the water volume adjustment knob 4 is raised, the groundwater supplied from the
Water is sprinkled at a lower level. Also, Utsukai Showa 57-
Japanese Patent Publication No. 55555 discloses a water sprinkling nozzle having a water sprinkling nozzle hole formed in an inclined inner circumferential surface so that the diameter gradually decreases from the inner opening to the outer opening.

[Problems to be Solved by the Invention] Although the water spray nozzle of the former prior art makes it possible to lower the water spray height, it has a drawback in efficiently extending the water spray distance. This is because the cross section changes suddenly from the cavity to the water nozzle hole, resulting in a large water head loss and a decrease in the spray speed. This is because the watering distance becomes shorter and the watering range becomes narrower. For this reason, in the latter prior art water spray nozzle, the area of the flow path leading to the water spray nozzle hole is gradually narrowed, but the elevation angle of the water nozzle hole is large, so the water spray height is large during watering, and pedestrians There was a risk of water splashing onto people's clothing and car windows.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a water spray nozzle in which the elevation angle of the water spray nozzle hole is relatively small and the water head loss can be reduced.

[Means for Solving the Problems] The present invention includes a water spray nozzle body a having a water supply hole 19 in the lower part and a cavity 16a in the upper part communicating with the water supply hole 19, and a water spray nozzle main body a having a cavity 16a in the upper part that is connected to the water supply hole 19, and a water spray nozzle body a having a water supply hole 19 in the lower part and a cavity 16a communicating with the water supply hole 19 in the upper part. A lid body 1 whose head 17 is smaller in diameter than the horizontal upper surface 16c of the water spray nozzle main body a and protrudes upward from the upper surface 16c and is attached to the water spray nozzle main body a.
8, an annular groove 20 formed on the lower surface of this lid body 18 and tapered upwardly so as to be gradually narrower; and one end connected to the top of this groove 20 on the side surface of the head 17. A water nozzle hole 21 with the other end exposed, a truncated conical protrusion 18c connected to the inner wall 18a of the groove 20 and extending toward the bottom 16b of the cavity 16a, and the lid 18. It is provided with a water amount adjusting rod 23 that is inserted and provided to allow communication between the water supply hole 19 and the hollow portion 16a.

[Function] When water is sprayed from the water supply hole 19 through the cavity 16a, the groove 20, and the water nozzle hole 21, the cavity 16
Water head loss can be reduced because the water within a is sprayed while being rectified by the protrusion 18a and the groove 20.

[Example] Next, the structure and operation of this invention will be explained based on FIGS. 1 and 2.

Standpipes 12 are installed in places on the water pipes 11 buried in the road, and the water pipe 13 of the water spray nozzle body a is fitted onto the rise pipes 12 via packing 14, and a partition is installed above the water pipe 13. A water storage pipe 16 forming a cavity 16a whose upper surface is opened through a water storage pipe 15.
are arranged in series, and a head 17 is removably screwed onto the upper opening of this water storage pipe 16 to provide a lid 18. The head 17 of this lid 18 is connected to the horizontal upper surface 1 of the water storage pipe 16.
6c, and protrudes upward from the upper surface 16c. Further, an annular groove 20 is provided approximately at the center of the lower surface of the lid 18, and a protrusion 18c is provided approximately at the center of the groove 20 and extends toward the bottom 16b of the cavity 16a. An inner inner wall portion 18a and an outer outer wall portion 18 provided around the bottom
A groove 20 communicating with the water supply hole 19 of the water pipe 13 is formed so as to gradually become narrower upward, and the inner and outer walls 18a, 18b of this groove 20 are formed in a narrow upwardly tapered shape. The protrusion 1 is connected in the same tapered shape as the inner wall portion 18a.
8c is provided. That is, the protrusion 18c
is shaped like a truncated cone. A water spray nozzle hole 21 is provided at the head of the groove 20 with a small elevation angle b of about 5 to 15 degrees. In addition, this water nozzle hole 2
The outer end of the head 17 is formed on the side surface of the head 17. Further, a hole 22 is provided vertically in the center of the head 17, and a water amount adjusting rod 23 is rotatably fitted below the hole 22 from below the lid 18. The water amount adjusting rod 23 has an upper part shaped like a cylinder 24 and a lower part shaped like a truncated cone 25, and is rotatably provided in a watertight manner. Further, a vertical communication hole 26 communicating with the water supply hole 19 is formed at the lower end, and this vertical communication hole 2
6 has a horizontal communication hole 27 in the direction of the cavity 16a.
are set up consecutively. This horizontal communication hole 27 is
A communication hole 28 is formed at a suitable location in the inner wall portion 18a of the lid body 18 in order to communicate with the inner wall portion 18a of the lid body 18. 29 is a driver groove formed on the upper surface of the water volume adjustment rod 23,
The water amount adjusting rod 23 is rotated by a driver inserted through the hole 22.

In addition, 30 is a removable rubber cap that normally closes the hole 22, and 31 is a spacer that closes the inner wall 1.
It is fixed to the inside of 8a to prevent the water amount adjustment rod 23 from falling, and 32 is a rubber packing.

Then, remove the rubber cap 30, place a screwdriver against the driver groove 29, and turn the water volume adjustment rod 23 to open the horizontal communication hole 27 of the water volume adjustment rod 23.
When the groundwater is aligned with the communication hole 28 of the inner wall portion 8a, groundwater flows from the water pipe 11 to the water pipe 11 and the riser pipe 1.
2. Vertical communication hole 26, horizontal communication hole 27, communication hole 2
8, the groundwater in the cavity 16a flows along the inner and outer walls 18a and 18b, which gradually become narrower, and is sprayed slightly upward from the water spray nozzle hole 21 in the horizontal direction. At this time, the water reaches the groove 20 while being rectified from the bottom 16b side of the tapered inner wall 18a of the protrusion 18c, and is further rectified by the tapered inner and outer walls 18a and 18b of the groove 20 from the water nozzle hole 21 to the outside. water is sprinkled on the area.

As described above, in the embodiment, the head 1
7 protrudes upward from the horizontal upper surface 16c of the water spray nozzle main body a, and the outer end of the water spray nozzle hole 21 with a small elevation angle b is connected to the side surface of the head 17.
By lowering the water spray height, it is possible to prevent water from splashing on the clothes of the runner.

Furthermore, the water spray nozzle has a small elevation angle b of the water spray nozzle hole 21, and in the above embodiment, the communication holes 27, 28
Water flowing into the cavity 16a from the tapered inner and outer walls 18 formed in the protrusion 18c and the groove 20
Since the water flows to the water spray nozzle hole 21 while being rectified by the water a and 18b, there is no sudden change in the flow path on the way, and the water head loss can be reduced. Moreover, by forming the outer end of the water spray nozzle hole 21 on the side surface of the head 17, the elevation angle b can be made closer to the horizontal, so that the elevation angle b can be made smaller.

[Effects of the invention] The present invention has a water spray nozzle main body a having a water supply hole 19 in the lower part and a cavity 16a in the upper part communicating with the water supply hole 19, and a head 17 that closes the upper part of the cavity 16a. A lid body 1 that is smaller in diameter than the horizontal upper surface 16c of the water spray nozzle main body a, projects upward from the upper surface 16c, and is attached to the water spray nozzle main body a.
8, an annular groove 20 formed on the lower surface of the lid body 18 and tapered upward so as to gradually narrow upward, and one end connected to the top of the groove 20 on the side surface of the head 17. A water nozzle hole 21 with the other end exposed, a truncated conical protrusion 18c connected to the inner wall 18a of the groove 20 and extending toward the bottom 16b of the cavity 16a, and the lid 18. It is equipped with a water amount adjustment rod 23 that is inserted and provided to allow communication between the water supply hole 19 and the hollow portion 16a, and the elevation angle b of the water nozzle hole 21 can be made small;
Moreover, since water can be sprayed from the water spray nozzle hole 21 while being rectified from the bottom of the cavity, water head loss can be reduced, and the water spray length can be increased despite the low water spray height.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the nozzle body of this invention, FIG. 2 is an exploded perspective view of the same, and FIG. 3 is a sectional view of a conventional nozzle body. 16a...Cavity part, 16b...Bottom part, 16c...
...Top surface, 18...Lid body, 18a...Inner wall part, 18
b...Outer wall portion, 18c...Protrusion, 19...Water supply hole, 20...Groove portion, 21...Water nozzle hole, a...
...Water nozzle body.

Claims (1)

[Scope of utility model registration request] A water spray nozzle main body a has a water supply hole 19 in its lower part and a cavity 16a in its upper part that communicates with the water supply hole 19, and a head 17 that closes the upper part of the cavity 16a.
is a lid body 18 that is smaller in diameter than the horizontal upper surface 16c of the water spray nozzle body a, projects upward from the upper surface 16c, and is attached to the water spray nozzle body a; An annular groove 20 is formed in a tapered shape so as to become narrower, and one end is connected to the top of this groove 20 to form the head 17.
a water nozzle hole 21 with the other end exposed on the side surface of the
A truncated conical protrusion 18c is connected to the inner wall 18a of the groove 20 and extends toward the bottom 16b of the cavity 16a, and the water supply hole 19 and the cavity 16a are inserted into the lid 18. A water sprinkling nozzle characterized by comprising a water amount adjusting rod 23 provided so as to be able to communicate with each other.