JPH0711797Y2 - Watering nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention mainly relates to a sprinkler nozzle that is buried on a road surface for snow removal and the like.

(Prior Art) Conventionally, there are various types of water spray nozzles of this type, as shown in Japanese Utility Model Publication No. 52-7847, Japanese Utility Model Publication No. 63-8434, and the like.

These basic configurations are: a nozzle body made of casting, which has a water supply pipe connection port in the lower part and is buried in a road surface, a water pressure adjusting valve with a pressure adjusting screw mounted inside the nozzle body, and an upper part of the nozzle body. And a sprinkling cap with a sprinkling hole for spouting the water suppressed through the water pressure adjusting valve to the outside.

(Problems to be solved by the invention) By the way, in the above-mentioned conventional water spray nozzle, the lower end of the valve chamber of the water pressure adjusting valve in the nozzle body is connected to the lower water supply pipe connection port side by a relatively large round hole. Since it does not function as a sand stop, foreign matter such as sand that is mixed with water from the lower water supply pipe connection port side flows into the valve chamber of the water pressure control valve almost as it is. For this reason, foreign matter such as sand easily accumulates in the valve chamber of the water pressure adjusting valve, the water discharge port, the nozzle body, and the water spray hole of the water spray cap, causing clogging, and the water spray function is lost in a relatively short period of time. It was difficult to carry out maintenance such as maintenance and inspection.

The present invention has been made in view of the above circumstances, has an excellent sand stop function, and can significantly reduce the inflow of foreign matter such as sand sent in mixed with water into the water pressure adjustment valve, and at the same time, foreign matter once enters the water pressure adjustment valve. Even if it does not remain, it is possible to prevent clogging of the water pressure control valve chamber, the water control discharge port, the nozzle body, and the water spray hole of the water spray cap. It is an object of the present invention to provide a sprinkling nozzle that makes it easier.

[Constitution of device]

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention has a nozzle main body having a water supply pipe connection port at the bottom and arranged on a road surface, and a hydraulic pressure installed inside the nozzle main body. In a sprinkling nozzle including a regulating valve and a sprinkling cap provided at the upper part of the nozzle main body for sprinkling the water suppressed through the water pressure regulating valve to the outside, a narrow slit is formed below the water pressure regulating valve. It is characterized in that it has a sand stop hole that has a shape and expands upward in a tapered cross-section.

(Operation) In the sprinkling nozzle having the above structure, even if foreign matter such as sand is mixed with water from the lower water supply pipe connection port side of the nozzle body and is sent,
In place of the conventional large-diameter round hole at the bottom of the water pressure adjustment valve, a narrow slit-shaped sand stop hole is provided, so foreign matter such as sand is stopped there and the inflow into the water pressure adjustment valve is drastically reduced. Come to do. Even if a foreign matter enters the water pressure adjusting valve, the foreign matter that can pass through the narrow sand stop hole has a small particle size and does not clog in the middle of the water pressure adjusting valve. In addition to being ejected from the sprinkling hole of the sprinkling cap, the sand stop hole expands upward in a tapered cross-section, so foreign matter in the valve chamber is blown up and blown out without settling around the bottom. Moreover, when the water supply is stopped, the foreign matter naturally drops from the sand stop hole with a tapered cross section and falls toward the lower water supply pipe. As a result, no foreign matter remains, clogging can be prevented, the water sprinkling function can be maintained for a long time, and maintenance such as maintenance and inspection becomes easy.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an assembled state, FIG. 2 is a plan view of the same, FIG. 3 is a perspective view of a water pressure adjusting valve, and FIG. 4 is an exploded perspective view of the whole. In the figure, 1 is a nozzle body that is embedded in a concrete paved road surface, etc. so that the upper end surface is flush.
D) consists of. The nozzle body 1 has a cylindrical water supply pipe connection port 1a at the lower part, and is connected to a water supply pipe 2 which is erected from the ground through an O-ring 3. Further, a female screw 1b is formed on the upper half of the inner peripheral surface of the water supply pipe connection port 1a of the nozzle body 1, and a large diameter water suppression chamber spread around the upper side of the female screw 1b.
1c is formed, and further, a cap mounting chamber 1e having a large diameter is formed on the upper side thereof via the reduced diameter portion 1d.

In the figure, 4 is a water pressure adjusting valve mounted in the central part of the nozzle body 1, and this water pressure adjusting valve 4 is a valve box 5, a slide sleeve 6 and an internal thread sleeve 7 mounted therein, and is screwed into these. It is composed of a pressure suppression adjusting screw 8.

The valve box 5 is of a substantially cylindrical shape having a valve chamber 5a inside, and a male screw 5b is formed on the outer peripheral surface of the lower portion of the valve box 5, and by screwing this into an internal screw 1b of the nozzle body 1, the nozzle body It is mounted in 1 through an O-ring 9. The female screw 1b of the nozzle body 1 is a square groove screw, and the male screw 5b of the valve box 5 is a round thread screw and chamfered 5c to prevent foreign matter such as sand from being caught.

In the lower portion of the valve chamber 5a of the valve box 5, there is formed a sand stop hole 5d which has a slit shape having a width of about 1.5 mm and a length of about 8 mm and which expands upward in a tapered sectional shape. Further, in the peripheral wall portion of the valve box 5 at an intermediate height, the water suppression chamber of the nozzle body 1 is provided.
A plurality of water control discharge ports 5e opening in a trumpet shape toward 1c are formed at equal intervals in the circumferential direction. Furthermore, this valve box 5
A hexagon wrench hole 5f that also serves as a rubber plug hole is formed at the upper end of
In addition, a cap pressing collar 5g is formed on the outer periphery of the cap pressing protrusion.

The slide sleeve 6 is press-fitted into the upper half portion of the valve chamber 5a of the valve box 5 from above through the hexagonal wrench hole 5f, and the female thread sleeve 7 is coated with adhesive on the upper side and press-fitted and adhesively fitted. ing.

The slide sleeve 6 is a kind of valve seat and has a rectangular cylindrical shape, and a plurality of water control holes 6a that are in communication with the water control discharge ports 5e of the valve box 5 are formed in the peripheral wall portion.

Further, the female screw sleeve 7 on the upper side of which is adhesively fixed has a cylindrical shape, and a female screw 7a is formed on the inner peripheral surface thereof.

The pressure regulating screw 8 which is a kind of flow rate regulating valve body is screwed into the female screw sleeve 7. A male screw 8a is formed only on the upper half of the pressure regulation adjusting screw 8 and can be easily screwed into the female screw sleeve 7 by a flat-blade screwdriver.
By adjusting the screw-in depth, the rod-shaped lower half portion 8b having no thread is slidably fitted into the slide sleeve 6 and the water control hole is formed.
This is a configuration in which the opening amount of 6a is variable.

The male screw 8a of the pressure regulating screw 8 and the female screw 7a of the female screw sleeve 7 are designed to prevent foreign matter such as sand from being caught, and the rod-shaped lower half portion 8b of the pressure regulating screw 8 and the inner surface of the female screw sleeve 7 are prevented. An O-ring 10 is interposed between and to seal.

Further, the slide sleeve 6 of the water pressure adjusting valve 4 is made of a resin such as polyethylene, and is resistant to rust and acid, and can cope with salt-containing water in a region near the coast, and can be used for many years. The valve box 5 is made of cast steel (SCS),
The female thread sleeve 7 is a brass processed product (BsBM), and the pressure control screw 8 is stainless steel (SUS), so that the biting between these parts is prevented by the difference in the potential difference between different metals. This is the nozzle body 1 made of cast product (FCD).
The same is true for.

In the figure, 11 is a water spray cap fitted in the cap mounting chamber 1e above the nozzle body 1, which is a cast product with a special mixture of cast steel (SC
S) has a high hardness and is excellent in wear resistance and corrosion resistance, and an engaging stepped portion 11a is formed in the central hole, which is a cap pressing collar 5g of the valve casing 5 of the water pressure adjusting valve 4. It is pressed down by and prevented from coming off. On the upper surface of the sprinkling cap 11, there are formed a plurality of (for example, four as shown in the drawing) recessed portions 11b each having a substantially inverted triangular cross section and a diameter of slightly less than 1 cm at equal intervals in the circumferential direction. Water spouting holes 11c are formed obliquely upward and outward one by one with their upper ends opened at the lower portions of the outward slopes in the respective recesses 11b. Each of the water spray holes 11c is a small diameter hole having a diameter of about 3 mm. Further, under each of these water spray holes 11c, a water flow groove 11d having a substantially triangular cross section is formed in an annular shape, so that the length of each water spray hole 11c is configured as short as possible so that clogging is unlikely to occur. Has been

O-rings 12 and 13 are interposed and sealed between the outer peripheral surface of the water spray cap 11 and the nozzle body 1, and between the inner peripheral surface of the water spray cap 11 and the valve casing 5 of the water pressure adjusting valve 4. There is.

In the assembled state, a rubber plug (not shown) is press-fitted into the hexagon wrench hole 5f that also serves as a rubber plug hole at the upper end of the valve box 5 of the water pressure adjusting valve 4 to keep the closed state.

Thus, in the water sprinkling nozzle having the above-described configuration, when water is sprinkled from the lower water supply pipe 2 that is raised from the underground pipe to sprinkle water on the road surface during snowfall, the water is connected to the lower water supply pipe of the nozzle body 1. From the opening 1a to the valve chamber 5a through the slit-shaped sand stop hole 5d in the lower portion of the valve box 5 of the water pressure adjusting valve 4, and from there, a plurality of control openings whose opening amounts are adjusted by the pressure adjusting screws 8 in the slide sleeve 6 are provided. Through the water hole 6a, enter the water suppression chamber 1c wider than the water discharge outlet 5e opening like a trumpet, and from there, through the water flow groove 11d of the water spray cap 11 via the reduced diameter portion 1d, each water spray hole 11c. It will be jetted more obliquely upward and sprinkled on the road surface.

Even when foreign matter such as sand mixed in with water is sent from the lower water supply pipe connection port 1a during such water sprinkling, the sand stop hole 5d in the lower portion of the valve box 5 of the water pressure adjusting valve 4 has a large diameter in the conventional circle. Since the holes are replaced by narrow slits, foreign matters such as sand are stopped there, and the inflow of the water pressure adjusting valve 4 into the valve chamber 5a is drastically reduced.

Further, even if foreign matter enters the inside of the valve chamber 5a through the sand stop hole 5d, the foreign matter that can pass through the narrow sand stop hole 5d has a small particle size and is not clogged on the way. Water control hole 6a and water control discharge port 5e of valve 4 and water spray hole of water spray cap 11
It will pass smoothly through 11a and be ejected to the outside.

In addition, since the sand stop hole 5d expands upward in a tapered shape in cross section, the foreign matter in the valve chamber 5a is blown up and ejected to the outside without settling around the bottom portion, and when the water supply is stopped. The foreign matter in the valve chamber 5a naturally falls and falls toward the lower water supply pipe. As a result, foreign matter does not remain, clogging can be prevented, the water sprinkling function can be maintained for a long time, and maintenance such as maintenance inspection becomes easy.

In addition, since each water discharge outlet 5e of the water pressure adjusting valve 4 opens in a trumpet shape toward the wide water suppression chamber 1c, foreign matter in the water suppression chamber 1c is also settled on the bottom. Instead, it is blown up and jetted out from the water spray holes 11c of the water spray cap 11, and the clogging of the water pressure adjusting valve 4 due to the reverse flow of mud or the like is eliminated. Further, since the length of each water spray hole 11c is short, it is more difficult for foreign matter to be clogged. Each watering hole 11c on the plate
Since the upper end of the tire is opened in the recessed position in the recess 11b, there is no inconvenience that the water spray hole 11c is deformed and closed by a tire chain or other external force.

In addition, turn the water pressure adjusting valve 4 with a hexagon wrench to rotate the nozzle body 1
It can be easily disassembled by removing it from the inside, and maintenance such as maintenance and inspection can be done easily, and the sprinkling cap 11 and the sprinkling hole 11c can be changed even after construction.

[Effect of device]

Since the present invention is configured as described above, it has an excellent sand blocking function,
It is possible to drastically reduce the inflow of foreign matter such as sand sent in mixed with water into the water pressure control valve, and even if foreign matter once enters the water pressure control valve, it is possible to prevent residual deposit, and the valve of the water pressure control valve can be prevented. It is possible to prevent clogging of the inside of the room, the water discharge outlet, the nozzle body, and the sprinkling hole of the sprinkling cap, and the sprinkling function can be maintained for a long period of time, resulting in an excellent effect of facilitating maintenance such as maintenance and inspection.

[Brief description of drawings]

FIG. 1 is a sectional view, FIG. 2 is a plan view, FIG. 3 is a perspective view of only a water pressure adjusting valve, and FIG. 4 is an exploded perspective view of the whole. . 1 …… Nozzle body, 1b …… Water supply pipe connection port, 4 …… Water pressure adjusting valve, 5d …… Sand stop hole, 11 …… Sprinkling cap, 11c ……
Sprinkling holes.

Claims (1)

[Scope of utility model registration request] 1. A nozzle main body having a water supply pipe connection port at a lower part and buried in a road surface, a water pressure adjusting valve mounted inside the nozzle main body, and a water pressure adjusting valve provided at an upper part of the nozzle main body. A sprinkling nozzle having a sprinkling cap with a sprinkling hole for sprinkling the suppressed water to the outside, in which a sand stop hole having a narrow slit shape at the bottom of the water pressure adjusting valve and expanding upward in a tapered cross section The watering nozzle is characterized by being provided with.