JPH0131328Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a snow melting nozzle for sprinkling groundwater, river water, etc. onto roads and the like.

[Conventional technology and problems]

As a conventional snow melting nozzle of this type, the snow melting nozzle disclosed in Japanese Utility Model Application Publication No. 55-68556 filed by the same applicant is well known. As shown in FIG. 5, this snow melting nozzle is provided with a water supply hole 22 at the lower center of a nozzle body 21, and a cavity 23 is connected above the water supply hole 22, and the cavity 23 is connected to the outside for water spraying. A nozzle hole 27 is provided diagonally on the top plate part 24, and the water supply hole 2 is also provided on the lower surface of the top plate part 24.
A guide groove 25 having a rectangular cross section centered at 2 is formed. In the conventional snow melting nozzle,
The water flowing in from the water supply hole 22 flows through the corner 2 of the guide groove 25.
After colliding with water spray nozzle 5a, water flows into the water spray nozzle hole 27 and is drained, so there is a problem that the water head loss is large. In other words, when water collides with the corner 25a, eddies occur,
This eddy causes the head loss to increase. Also, excess water in the guide groove 25 is drained into the cavity 23.
and then circulated again to the water nozzle hole 2.
It is discharged from 7. Even in such circulating water, there is a problem that the water head loss becomes large due to the corner portion 25a.

Japanese Utility Model Application Publications No. 136626/1982 and No. 42841/1988 are known as solutions for solving these problems. In the former nozzle, the guide groove at the upper part of the cavity has a convex arcuate inner surface, and the direction of the flow path is directed outward. Products with such an inner surface are effective when the nozzle hole is on the side, but if the nozzle hole is on the top surface and is almost flush with the road surface, the direction of the flow path will not face the nozzle hole. , vortices, etc. are likely to occur. Furthermore, in the latter publication, the inner surface of the guide groove is tapered. However, in such a device, there is a problem that the normal line of the inner lower end of the guide groove is inclined, that is, it is not parallel to the flow path, and as a result, collisions and the like occur and the head loss increases.

[Means for solving problems]

In the present invention, a water supply hole is provided at the lower center of the nozzle body, a cavity is connected above the water supply hole, and a separate nozzle head that covers the nozzle body has an upper cavity that communicates with the cavity. In a snow melting nozzle in which a water spray nozzle hole communicating with the upper cavity and the outside is provided obliquely in the top plate part, a guide groove is formed on the lower surface of the top plate part in the same center as the water supply hole and has an arcuate inner side. The lower part of the water nozzle hole communicates with the upper part of the guide groove, and the inner side of the guide groove is formed into a concave arc shape with an arc angle of approximately 90 degrees, and the tangential direction of the lower part of this arc part is connected to the water supply hole. the outer side of the bottom of the cavity is raised in an arc shape,
A cylindrical fitting part is formed at the upper periphery of the nozzle body, a cylindrical fitting part is formed at the lower periphery of the nozzle head, and the fitting part and the fitting part are pressed together through packing. They are fitted.

[Effect]

Water sent from the water supply hole reaches the upper part along the guide groove from the lower part of the guide groove, and is guided from this upper part to the lower part of the water spray nozzle hole so that water can be sprayed outside. Additionally, water within the cavity can be convected by the guide grooves and the ridges.

〔Example〕

1 to 3 show an embodiment of the present invention, in which a water storage part 3 is connected to the upper part of a water passage part 1 via a partition wall 2, and an upper opening of a cavity 4 provided in the water storage part 3 is shown. A nozzle main body 6 with a fitting receiving part 5 provided on the periphery, a water volume adjustment knob 7 screwed into the center, a water sprinkling nozzle hole 8 provided around the periphery, and an upper hollow part 9 communicating with the water sprinkling nozzle hole 8.
It consists of a nozzle head 11 with a fitting part 10 provided on the lower periphery of the nozzle body 6 or the nozzle head 11, and a cut groove 12 is formed in the fitting receiving part 5 of the nozzle body 6 or the nozzle head 11, and in the fitting part 10 circumferential wall,
A ring-shaped packing 13 with a large diameter is attached to this cut groove 12.
Insert the nozzle head 1 so that a part of it protrudes.
1 is formed so that it can be press-fitted into the nozzle body 6 while pressing the ring-shaped packing 13, the nozzle body 6 and the nozzle head 11 are made thin 14, the diameter a of the cavities 4 and 9 is increased, and water is sprayed. This makes it possible to shorten the length b of the nozzle hole 8.

In the figure, reference numeral 15 denotes riser pipes provided at various places in the water pipe 16, and the water passage portion 1 of the nozzle is externally mounted on the riser pipe 15. Reference numeral 17 indicates a water supply hole that communicates the riser pipe 15 with the cavity 4, and 18 indicates a divided cylinder section provided upright at the upper mouth of the water supply hole 17, into which the lower end of the water volume adjustment knob 7 is inserted.

Further, a guide groove 19 coaxial with the water supply hole 17 is formed on the lower surface of the top plate portion 6a of the nozzle head 11. The guide groove 19 has a concave arc shape with an arc angle of approximately 90 degrees on the inside. Then, the tangential direction Y at the lower part 19a of this arcuate guide groove 19 is directed toward the water supply hole 17. Further, the outer side of the bottom 4a of the cavity 4 is formed into an arcuate raised portion 4b. Further, the upper portion 19b of the guide groove 19 communicates with the water spray nozzle hole 8.

FIG. 3 shows a ring-shaped packing 13 attached to the cylindrical fitting receiving part 5 of the nozzle body 6.
2 shows a state in which the cylindrical fitting portion 10 of the nozzle head 11 is press-fitted.

Therefore, vertical water sent into the cavity 4 from the water supply hole 17 flows along the guide groove 19 to the lower part 1.
The water is led from 9a to the upper part 19b, and then drained to the outside through the water spray nozzle hole 8. Further, the water remaining in the guide groove 19 descends, circulates along the raised portion 4b, and is led to the guide groove 19 again.

As described above, the water sent from the water supply hole 17 is guided to the water spray nozzle hole 8 along the guide groove 19, and the water head loss can be reduced. That is, the upward water that has flowed into the cavity 4 first reaches the water supply hole 1 in the tangential direction Y.
Since it has seven directions, it is guided without colliding with the guide groove 19. And the arc angle of the water is approximately
The water changes direction almost horizontally according to the 90-degree guide groove 19, and is sprayed to the outside from the water spray nozzle hole 8. At this time, since the guide groove 19 is concave, the water is always guided inward and can be accurately led to the water spray nozzle hole 8 formed on the top surface, thereby reducing the water head loss. Further, the circulated water can be circulated along the guide groove 19 from the raised portion 4b.

Furthermore, in the conventional example shown in FIG. 5, in which the nozzle body is connected with a screw 26, a screw hole 26a is required and the wall thickness is considerable, resulting in an increase in size and cost, and the water storage cavity 23 is also small. Since the water sprinkling nozzle hole 27 also becomes long, the water storage performance is very poor, but in the embodiment described above, it is made more compact, the cost is reduced, and the water sprinkling performance is also very excellent.

In other words, since the fitting structure is such that the nozzle head 11 can be press-fitted into the nozzle body 6 with one touch without using the screws 26, the wall 14 can be formed thin, and the water storage cavities 4 and 9 are large and the nozzle hole 8 is shortened. In this way, the flying distance is long and the watering area is wide.

Since the cavities 4 and 9 can be formed large in this way, the amount of water sprayed from all the water nozzle holes 8 can be stored at all times even if the number of water nozzle holes 8 is 5 or more, so the amount of water sprayed, the flying distance, and the watering range are wide. Become something.

Furthermore, since the water spray nozzle hole 8 can be formed short, the spraying distance is longer and the spraying area is wider.

Furthermore, after adjusting the water amount adjustment knob 7, the water flowing into the cavities 4, 9 is sufficiently stored in the wide cavities 4, 9, and is spouted at an accelerated rate from the short water sprinkling nozzle hole 8 by high pressure. The water spray quickly spreads outward and melts the snow effectively.

Further, since the nozzle head 11 and the nozzle body 6 are formed into a pressure-fitting structure using the ring-shaped packing 13, the nozzle head 11 can be separated by simply pulling it up strongly, and can be press-fitted by pushing it hard, making one-touch operation possible. Therefore, even if the fitting portion becomes rusted after being installed for a long period of time, the nozzle head 11 can be separated, making repairs and internal cleaning easier.

In addition, since the elastic force of the ring-shaped packing 13 made of rubber, resin, etc. provides a firm pressure fit, there is no risk of the nozzle head 11 coming off due to water pressure, and the watertightness is good.

Incidentally, the present invention is not limited to the above-mentioned embodiment, and as shown in FIG. There are various modifications such as the convex fitting part 5 may be fitted.

[Effect of idea]

In the present invention, a water supply hole is provided at the lower center of the nozzle body, a cavity is connected above the water supply hole, and a separate nozzle head that covers the nozzle body has an upper cavity that communicates with the cavity. In a snow melting nozzle in which a water spray nozzle hole communicating with the upper cavity and the outside is provided obliquely in the top plate part, a guide groove is formed on the lower surface of the top plate part in the same center as the water supply hole and has an arcuate inner side. The lower part of the water nozzle hole communicates with the upper part of the guide groove, and the inner side of the guide groove is formed into a concave arc shape with an arc angle of approximately 90 degrees, and the tangential direction of the lower part of this arc part is connected to the water supply hole. the outer side of the bottom of the cavity is raised in an arc shape,
A cylindrical fitting part is formed at the upper periphery of the nozzle body, a cylindrical fitting part is formed at the lower periphery of the nozzle head, and the fitting part and the fitting part are pressed together through packing. Since the guide groove is formed in an arc shape, the water sent from the water supply hole is guided without sudden changes, and the guide groove has a concave shape with an arc angle of approximately 90 degrees. Since it is formed in an arc shape, the water is guided from the vertical direction to the horizontal direction with less water head loss. In addition, since the tangent line at the bottom of the guide groove is formed toward the water supply hole, the water sent from the water supply hole is guided to the guide groove without changing the direction of water flow, and the upper part of the guide groove is sprayed with water. Since the nozzle holes are arranged in series, the water guided into the guide groove can flow out to the water spray nozzle hole without sudden changes in flow.
Furthermore, by bulging the outside of the bottom of the cavity in an arcuate shape, the water flowing within the cavity and the upper cavity can be brought into a convection state, thereby reducing the water head loss. Moreover, in the present invention, a cylindrical fitting part is formed on the periphery of the upper mouth of the nozzle body, and a cylindrical fitting part is formed on the periphery of the lower mouth of the nozzle head, which is separate from the nozzle body. By press-fitting the fitting part through packing, screws, screw holes, etc. can be wiped out and the occupied volume of the hollow part and the upper hollow part can be increased, and the water nozzle hole can be shortened. Therefore, the water head loss in the water spray nozzle hole can also be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is an exploded perspective view, Fig. 2 is a sectional view of the same as above, Fig. 3 A and B are working state diagrams, Fig. 4 is a sectional view of another embodiment, and Fig. FIG. 5 is a sectional view of a conventional device. 4... Cavity part, 4a... Bottom part, 4b... Protruding part, 5... Fitting receiving part, 6... Nozzle body, 6a
... Top plate part, 9 ... Upper cavity part, 10 ... Fitting part, 11 ... Nozzle head, 17 ... Water supply hole, 19 ...
...Guide groove, 19a...lower part, 19b...upper part, Y
...Tangential line.

Claims (1)

[Scope of utility model registration request] A water supply hole is provided at the lower center of the nozzle body, a cavity is provided above the water supply hole, and a separate nozzle head that covers the nozzle body is provided with an upper cavity that communicates with the cavity. In a snow melting nozzle in which a water sprinkling nozzle hole communicating with the upper cavity and the outside is provided obliquely in the top plate part, a guide groove is formed in the lower surface of the top plate part in the same center as the water supply hole and has an arcuate inner side. The lower part of the water spray nozzle hole communicates with the upper part of the guide groove, and the inner side of the guide groove is formed into a concave arc shape with an arc angle of approximately 90 degrees, and the tangential direction of the lower part of this arc part is formed toward the water supply hole. the outside of the bottom of the cavity is raised in an arc shape, a cylindrical fitting receiving part is formed at the upper periphery of the nozzle body, and a cylindrical fitting part is formed at the lower periphery of the nozzle head; A snow melting nozzle characterized in that the fitting receiving part and the fitting part are pressure fitted through packing.