JP5037897B2 - nozzle - Google Patents

Description

  The present invention relates to a nozzle, and in particular, is suitably used as a spray nozzle for mitigating the heat island phenomenon.

Fluid injection nozzles are used in various industrial fields, and recently, they are used for mitigating the heat island phenomenon that lowers the local temperature in a local area.
For example, in Japanese Patent Laid-Open No. 6-159877 (Patent Document 1), a nozzle that performs mist-like water spraying is disposed on an access part such as a promenade or an overpass that leads to a customer collection facility. The nozzle disclosed in this Patent Document 1 is composed of a water jet nozzle, and it is described that water supplied from a pump is sprayed in the form of a mist with water particles of 50 μm or less in the space of the promenade.

Japanese Patent Laid-Open No. 6-159877

The nozzle disclosed in Patent Document 1 is merely disclosed as a nozzle that sprays water with particles of 50 μm or less, and there is no disclosure of a specific structure of the nozzle.
As described above, in order to spray with particles of 50 μm or less, it is necessary to use a nozzle having a high injection pressure, and it is often made of a metal processed product. In that case, it is often made of stainless steel having excellent rust resistance. However, when the nozzle is formed of stainless steel, the processing cost is high and the nozzle per one becomes very expensive. In addition, corrosion is likely to occur in iron-based metals, and the generated rust is likely to cause foreign matters to be mixed into the water.
When such a nozzle made of metal and having a high unit price per unit is used as a countermeasure for heat island, it is necessary to dispose a large amount of nozzles in a required area, so that the total cost becomes very high and practical. It becomes a big neck.
From a cost standpoint, nozzles made of resin molded products are inexpensive, but if the injection pressure is high, the nozzles of resin molded products have problems with pressure resistance due to insufficient strength and wear resistance. There is also a problem that is inferior.

  The present invention has been made in view of the above-described problems, and even if the injection pressure is high, the main body is molded with a resin molded product, and as a result, an inexpensive nozzle that can dramatically reduce the manufacturing cost compared to the prior art. It is an issue to provide.

In order to solve the above problems, the present invention provides:
And the resin molding body is one fluid nozzle with a ceramic made of a nozzle tip attached to the body,
The main body closes one end of a cylindrical peripheral wall with an injection side wall, and provides an injection port at the center of the injection side wall, while the other end is an opening connected to a water supply pipe, and the same extends from the opening to the injection side wall. The hollow part of the inner diameter is used as the water inflow path of the required pressure,
The nozzle tip is mold-fixed to the inner wall surface surrounding the injection hole of the injection side wall during the injection molding of the main body, the nozzle tip is disk-shaped, and a plurality of circular swirling grooves are provided at an angle interval on the inner surface on the inflow side, An injection hole communicating with the inner end of the swivel groove is provided, and the injection hole includes a tapered hole portion whose diameter is reduced, and a small diameter hole portion that is continuous with the tapered hole portion and communicates with the injection hole of the main body. wherein the injection port main body is flowed while swirling the water, the particle size from該噴port provides a nozzle that has a configuration for generating a spray of the swirling flow of 10 to 100 [mu] m.

As described above, the nozzle of the present invention is a ceramic nozzle that has wear resistance, rust prevention, high pressure resistance, and light weight at the nozzle portion that receives the injection pressure in contact with a high flow rate fluid. The chip is arranged. The other portions are not directly subjected to the jet pressure and are in contact with a low-flow-rate fluid, and a resin having a lower wear resistance than ceramic is sufficient. Therefore, a resin excellent in moldability is used.
Thereby, compared with the nozzle which consists of metal workpieces, such as stainless steel, manufacturing cost can be reduced significantly and a nozzle can be provided cheaply. Therefore, it becomes a suitable thing as a spray generation nozzle for temperature fall for the heat island countermeasure which needs to arrange | position a nozzle in large quantities.

The nozzle tip has a flat plate shape and is molded and fixed to the inner surface of the injection side wall of the main body.
Thus, when the nozzle tip is molded and fixed to the main body, the structure of the main body does not need to be a structure that allows the nozzle chip to be assembled, the nozzle chip assembling process is not required, and the nozzle chip is attached to the main body. Can be securely fixed without gaps.

The Nozuruchi' flop, the swirling flow generating means is provided, that has a configuration for generating a spray of the swirling flow from the injection hole of the nozzle tip.

As the swirl flow generation means, and only set the turning groove on the inner surface of the nozzle tip.
Thus, when the fluid flowing into the nozzle hole of the main body from the injection hole of the nozzle tip is a swirling flow, the particle diameter to be sprayed can be reduced, and fog can be generated in a wide range.

As described above, the injection hole Roh Zuruchippu is to a tapered hole whose diameter decreases from the inlet side, a small diameter hole which communicates with the injection port of the main body in succession in the tapered hole portion, the tapered the fluid flows while swirling through turning groove communicating with the hole, that has a configuration for generating a spray of the swirling flow from the injection port of the injection hole and the body of the nozzle tip.

As described above, the main body has a cylindrical shape having an injection side wall at one end, a ceramic nozzle tip is fixed to the inner surface of the injection side wall, and the hollow portion is hollow. An adapter may be inserted into the hollow portion from the opening at the other end and fixed in the hollow portion, and the liquid channel may be formed by the adapter .
If it is set as this structure, when it fills in a main body using what provided the fluid flow path of arbitrary shapes as an adapter, it can be set as the nozzle which has arbitrary performance.

When the adapter is loaded into the cylinder portion of the main body, the adapter may be constituted by a single unit or a unit.
In the case of a unit, it consists of a cylindrical strainer boulder, a cylindrical strainer screen that is externally fitted to the strainer holder, and a closer that is fitted and fixed to the distal end surface of the strainer holder. It is preferable to configure.

  As described above, a strainer is provided inside the nozzle, and when foreign matter in the fluid is removed by the strainer screen before flowing into the nozzle hole and the nozzle hole of the main body, the nozzle is made into a fine hole in order to increase the injection pressure. It is possible to reliably prevent the injection hole of the chip and the injection hole of the main body from being clogged with foreign substances.

  More specifically, an opening in the axial direction is provided on the front side of the peripheral wall of the cylindrical strainer holder with an interval in the circumferential direction, the strainer screen is externally fitted on the outer periphery of the front peripheral wall, and the strainer In the hollow part of the holder, a flow path opening / closing valve is accommodated at one end of the spring, and the flow path opening / closing valve is opened and moved forward from the opening by the fluid pressure flowing in from the fluid inlet of the rear end opening of the hollow part. The fluid flowing into the hollow portion of the strainer holder is caused to flow out through the opening and the strainer screen to a fluid flow path between the strainer holder and the peripheral wall of the main body, and the fluid flow path communicates with the outer end of the swirling groove. It is preferable to let it be.

  As described above, when the flow path opening / closing valve that opens and closes by the inflow pressure is arranged using the hollow portion of the strainer holder, the high-performance nozzle including the strainer and the flow path opening / closing valve without increasing the size of the nozzle, can do.

  The nozzle of this invention is used suitably as a spray nozzle for temperature fall for a heat island countermeasure. In that case, the fluid to be sprayed is made of water, the particle diameter of the water to be sprayed is 10 to 100 μm, and a large number of fluids are arranged at a pitch of 100 to 1000 mm in the required region.

  As described above, the nozzle of the present invention has pressure resistance and rust prevention on the inner wall surface surrounding the nozzle hole where pressure resistance is required, and uses a ceramic nozzle tip for light weight, and the main body is a resin molded product. Thus, the manufacturing cost of the nozzle can be greatly reduced, and the unit price of the nozzle can be reduced. Therefore, it becomes a suitable thing as a spray generation nozzle for temperature fall for the heat island countermeasure which needs to arrange | position a nozzle in large quantities.

Hereinafter, embodiments of the nozzle of the present invention will be described in detail with reference to the drawings.
1 and 3 show a nozzle 1 according to the first embodiment. The nozzle 1 is a single-fluid nozzle that sprays water, and is used as a spray nozzle for heat island countermeasures.

  The nozzle 1 includes a cylindrical main body 2 made of injection-molded resin, and a ceramic nozzle chip 3 fixed to the inner surface of the injection side wall 2a of the main body 2. In this embodiment, the main body 2 is formed of a polyamide-based resin. is doing.

  The main body 2 of the resin molded product has one end of a cylindrical peripheral wall 2a closed with an injection side wall 2b, and an injection port 2c is provided at the center thereof, while the other end of the peripheral wall 2a is an opening 2d, and the opening 2d is a pipe 20 for supplying water. , And flows into the hollow portion 2e of the main body 2. The main body 2 has a total length of about 20 mm and a maximum diameter of about 15 mm, and is a small and lightweight nozzle.

The nozzle tip 3 has a substantially disk shape, is molded when the main body 2 is molded, and is fixed to the inner surface of the injection side wall 2a of the main body 2. The nozzle tip 3 communicates with the nozzle hole 2c at the center of the injection side wall 2b of the main body 2. The injection hole 3a is provided in the center, and water is sprayed as a swirling flow from the injection hole 3a through the injection port 2c.

  The injection hole 3a includes a tapered hole portion 3a-1 that is reduced in diameter from the inflow side, and a small diameter hole portion 3a-2 that is continuous with the tapered hole portion 3a-1 and communicates with the injection port 2c. As shown in FIG. 2, the inner surface of the nozzle tip 3 is provided with swiveling grooves 3b that are curved in an arc shape at intervals of 90 degrees, and the inner peripheral ends of these swiveling grooves 3b are the peripheral edges of the tapered hole portion 3a-1. The water flows in while turning water through the turning groove 3b.

  The pipe 20 connected to the nozzle 1 is connected to a water supply source via a high-pressure pump (not shown), and water having a water pressure of 0.1 to 10 MPa is supplied to the nozzle 1 to spray with a particle diameter of 10 to 100 μm. It is configured to generate.

  In the nozzle 1, the water flowing into the main body 2 from the pipe 20 passes through the swivel groove 3 b of the nozzle tip 3 on the jet side and flows into the tapered hole portion 3 a-1 of the jet hole 3 a as a swirl flow. In the tapered hole portion 3a-1, the water droplets are made finer because they collide with the inner peripheral surface of the hole portion while turning, and the water droplets are refined to the small diameter hole portion 3a-2 on the ejection side from the tapered hole portion 3a-1. It flows in and is further sprayed in the form of a mist in the form of fine water droplets of 10 to 100 μm from the nozzle 2 c of the communicating main body 2.

Further, the nozzle of the present invention is not a conventional metal processed product, but only the nozzle tip 3 is made of ceramic, and the main body 2 is an injection molded product, so that the manufacturing cost is lower than that of the same kind of nozzle made of metal processed product. It can be greatly reduced. Also, the weight can be greatly reduced.
Therefore, as shown in FIG. 3, the nozzles 1 can be attached to the holder 30 at a pitch of 100 to 1000 mm so as to be suitable for practical use as a heat island countermeasure nozzle.

4 and 5 show a second reference embodiment.
In the reference second embodiment, an adapter composed of a whirling flow generating waller 50 shown in FIG. 5 is loaded in the hollow portion 2 e of the main body 2. The waller 50 is provided with oblique holes 50a at intervals in the circumferential direction, and a swirl flow is generated by passing through the oblique holes 50a.
Further, the inner peripheral surface of the main body 2 continuing from the installation position of the warler 50 to the tapered injection hole 3a of the nozzle tip 3 is a conical surface, and the nozzle tip 3 is a one-step tapered injection hole 3a, No swiveling groove is provided on the inner peripheral surface.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

As described above, the whirlers 50 are provided in the hollow portion 2e of the main body 2 to generate a swirling flow, and the swirling state is caused to flow into the injection hole 3a of the nozzle tip 3 so that the nozzle hole of the main body 2 is the same as in the first embodiment. The water droplets are sprayed as mist from 2c.
Instead of loading the waller 50, a turning groove may be formed on the inner peripheral surface of the main body 2.

FIG. 6 shows a third embodiment.
In the third embodiment, the adapter unit 4 is loaded in the hollow portion 2e of the main body 2 of the first embodiment shown in FIG.

  The adapter unit 4 is loaded into a cylindrical strainer boulder 5, a cylindrical strainer screen 6 fitted on the strainer holder 5, a closer 7 fitted and fixed to the tip end surface of the strainer holder 5, and a hollow portion of the strainer holder 5. And a flow path opening / closing valve 9 configured to be connected to one end of the spring 8.

  The strainer holder 5 is provided with an opening 5a in the axial direction with a space in the circumferential direction on the front side of the peripheral wall, and a cylindrical strainer screen 6 is fitted on the outer periphery of the front peripheral wall provided with the opening 5a. Further, a water inflow port 5e communicating with the hollow portion 5d is provided in the rear end wall 5c.

A fluid flow path 13 is provided between the strainer screen 6 and the inner peripheral surface of the peripheral wall 2a of the main body, and the fluid flow path 21 is continued to the outer peripheral portion of the joint portion between the nozzle tip 3 and the closer 7 on the ejection side. Yes.
A rear-side small-diameter portion 7 a of the closer 7 is fitted into the front end side of the strainer screen 6, and its end surface is in contact with the front end surface of the strainer holder 5. The front end surface of the front small diameter portion 7a is joined to the inner surface of the nozzle tip 3, and the swirling groove 3b shown in FIG. 2 is positioned therebetween, and the outer peripheral end of the swirling groove communicates with the fluid passage 13 on the outer peripheral side. The inner peripheral end communicates with the injection hole 3 a of the nozzle tip 3.

A flow path opening / closing valve 9 is connected to the rear end of the spring 8 inserted into the hollow portion 5 d of the strainer holder 5, and the flow path opening / closing valve 9 is attached to the valve seat 5 f provided on the inner surface of the peripheral wall of the strainer holder 5 with the spring 8. The flow path is closed by attaching and contacting. When water flows into the hollow portion 5d from the water inlet 5e, the flow path opening / closing valve 9 flows forward through the push-open valve seat 5f against the spring 8, and passes through the opening 5a in the peripheral wall and the strainer screen 6 on the outer periphery thereof to It is configured to flow out to the fluid flow path 13.
Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

  In the nozzle 1, water flows from the pipe 20 into the hollow portion 5d of the strainer holder 5, and the flow path opening / closing valve 9 moves forward against the spring 8 by the flowing water pressure, thereby opening the valve seat 5f. Water flows into the fluid passage 13 through the opening 5 a of the strainer holder 5 and the strainer screen 6. It flows into the outer peripheral portion 13a of the joint between the nozzle tip 3 and the closer 7 through the fluid passage 13, and further flows into the tapered hole portion 3a-1 of the injection hole 3a of the nozzle tip 3 through the turning groove 3b. It flows into the small-diameter hole portion 3a-2 on the injection side from the tapered hole portion 3a-1, and is further sprayed in the form of a mist from the injection port 2c of the main body 2 communicated.

  In the present embodiment, when a minute foreign matter is mixed in the water, the strainer screen 6 blocks the flow of the foreign matter, so that the occurrence of clogging can be prevented.

The nozzle of the present invention is not limited to the above-described embodiment, and if the control and control valve provided on the piping side controls the supply and stop of water to the nozzle, the spring and the flow path opening / closing valve need not be provided. .
Moreover, in the said embodiment, although the adapter unit which assembled the strainer holder, the strainer screen, the closer, etc. is used, you may load the adapter which provided the fluid flow path which consists of one member in the hollow part of a main body .

It is sectional drawing of the nozzle of 1st Embodiment of this invention. It is drawing which shows the inner surface of a nozzle tip. It is drawing which shows the usage example of the nozzle of this invention. It is sectional drawing of the nozzle of the reference 2nd Embodiment of this invention. It is a side view which shows a waller. It is sectional drawing of the nozzle of 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Nozzle 2 Main body of resin molded product 2a Peripheral wall 2b Injection side wall 2c Injection hole 2e Hollow part 3 Ceramic nozzle tip 3a Injection hole 3b Turning groove 4 Adapter unit 5 Strainer holder 6 Strainer screen 7 Closer 8 Spring 9 Flow opening / closing valve

Claims (3)

And the resin molding body is one fluid nozzle with a ceramic made of a nozzle tip attached to the body,
The main body closes one end of a cylindrical peripheral wall with an injection side wall, and provides an injection port at the center of the injection side wall, while the other end is an opening connected to a water supply pipe, and the same extends from the opening to the injection side wall. The hollow part of the inner diameter is used as the water inflow path of the required pressure,
The nozzle tip is mold-fixed to the inner wall surface surrounding the injection hole of the injection side wall during the injection molding of the main body, the nozzle tip is disk-shaped, and a plurality of circular swirling grooves are provided at an angle interval on the inner surface on the inflow side, An injection hole communicating with the inner end of the swivel groove is provided, and the injection hole includes a tapered hole portion whose diameter is reduced, and a small diameter hole portion that is continuous with the tapered hole portion and communicates with the injection hole of the main body. nozzle wherein the nozzle hole of the main body is flowed while swirling the water, the particle size from該噴port that has a configuration for generating a spray of the swirling flow of 10 to 100 [mu] m. An adapter is loaded in the main body so as to face the inner surface of the nozzle tip. The adapter is a unit, a cylindrical strainer holder, a cylindrical strainer screen fitted on the strainer holder, and the strainer holder. 2. The nozzle according to claim 1 , comprising a closer fitted and fixed to a distal end surface, the closer constituting a distal end portion of the adapter, and the closer facing the inner surface of the nozzle tip . The nozzle according to claim 1 , wherein the nozzle is used as a spray nozzle for cooling a temperature for heat island countermeasures and is arranged at a pitch of 100 to 1000 mm in a required region .

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