JPH10272386A - Spray nozzle and spray system for road surface freeze-preventing solution using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray system for a road surface freeze preventing solution for managing the road surfaces in a planned and labor-saving manner in winter and also provide spray nozzles used suitably for the system. SOLUTION: Spray nozzles 1 are embedded at the given intervals toward a road in the direction laterally crossing the road, and branch pipes 3 branched from a water pipe 2 are connected with respective spray nozzles 1. The water pipe 2 is connected with a tank storing a freeze preventing solution. Respective spray nozzles 1 are set on the positions lower than a road surface T1, and a space 10 for storing the freeze preventing solution is kept securely between the road surface T1 and a spray nozzle upper face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying nozzle for a spraying system and a spraying system using the spraying nozzle for spraying water, hot water, chemicals and the like in order to prevent freezing of a road surface and to melt snow in a heavy snowfall area. About.

[0002]

2. Description of the Related Art Conventionally, a so-called road heating system has been known as a system for preventing a road surface from freezing or melting snow. The system embeds a heater such as a hot water circulation pipe, a hot air heat pipe, and a heating wire at predetermined intervals in asphalt pavement, and also provides facilities such as a boiler serving as a heat source, city gas supply, waste heat recovery, and power supply. It is possible to automatically operate the heater by controlling the heater to the optimum temperature by calculating the operating conditions, the optimum temperature of the heat source, and the like by determining the outside air temperature, the amount of snowfall, and the like by the sensor. Also,
As another system for preventing the road surface from freezing or melting snow, for example, there is a device for spraying a road surface antifreezing agent and a snow melting agent as disclosed in Japanese Patent Application Laid-Open No. 8-81929.

[0003]

However, in the above-described road heating system, a predetermined effect cannot be obtained if the distance between the embedded heaters is too large, so that a large number of heaters are required. Kerosene,
Since the consumption of gas, electricity and the like also reaches a considerable amount, there is a problem that initial costs and running costs increase. If you consider only the initial cost reduction,
Artificial means such as mechanical snow removal and sanding are also conceivable, but in this case, new problems arise such as an increase in labor costs and difficulty in working at night / early morning.

On the other hand, the conventional apparatus for spraying a deicing agent and a snow melting agent on a road surface has the following problems related to the spray nozzle. After operation, spraying of the antifreeze solution from the spray nozzle buried on the road surface is performed by setting the spray pressure of all the spray nozzles to the same by the spray amount adjustment valve. Had to be replaced with a new nozzle. However, in general, the road surface is provided with a slope to cope with the height of the terrain, the curved portion of the road, the drainage on the road surface, and the like. That is, in order to make the spray amount on the road surface uniform, it is necessary to adjust the spray amount from the spray nozzle on the high side of the road surface and to reduce the spray amount on the low side of the road surface. Therefore, in order to uniformly spray the antifreeze solution on the road surface, it is desired that the optimum discharge amount is set for each spray nozzle embedded in advance, and the discharge amount can be quickly and easily adjusted for each spray nozzle. I was If the height of the road surface changes due to maintenance and repair of the pavement after operation, it is necessary to embed the spray nozzle again to adjust the buried height of the spray nozzle upper surface to the road surface, and to correct the installation height It took a lot of trouble. Although one nozzle hole is provided for each spray nozzle, when the spray amount of the antifreeze solution is increased, the antifreeze solution is ejected radially on the road surface to the driver of the passing vehicle. He was giving psychological anxiety. During the suspension period in summer, rainwater and sewage infiltrate from the spray nozzles exposed on the road surface, and the spray nozzles and the pipe body are clogged with mud, etc.In order to resume operation at the beginning of early winter, A great deal of labor is required for cleaning the spray nozzles and the like, and labor saving in maintenance has been required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a system for preventing road surface freezing which can be performed in a planned and labor-saving manner on the road surface in winter, and a system for preventing the road from freezing. An object of the present invention is to provide a spray nozzle which is suitably used.

[0006]

In order to achieve the above-mentioned object, a spray nozzle according to the present invention has a single or a plurality of nozzle holes which open in a specific direction.
A connection port connected to the water supply pipe, a water chamber that connects the connection port to the nozzle hole, and a flow rate adjustment mechanism built in the water chamber, and a regulator of the flow rate adjustment mechanism is provided on the upper side of the nozzle body. It is characterized by being provided in an exposed manner.

[0007] The spray nozzle is installed buried in a desired location such as a road surface or a road shoulder, and receives a single or a plurality of antifreeze solutions supplied from a water supply pipe connected to a connection port through a connection port and a flow rate control mechanism. And spraying from the nozzle hole toward the road surface to prevent the road surface from freezing and melt the snow.
According to the spray nozzle of the first aspect, the installation arrangement and the number of the plurality of spray nozzles at the installation location of the spray nozzle, the water pressure by the water supply pipe and the discharge amount from the nozzle hole by the flow rate adjusting mechanism, the nozzle hole By appropriately setting the number of the nozzles, the direction of the nozzle holes, and the like, the amount of the antifreezing agent and the like to be sprayed on the road surface of the spray nozzle can be uniformly sprayed and efficiently sprayed. Therefore, it is not necessary to bury a large number of heaters on the road or install large-scale heat source equipment as in the conventional road heating system, and to supply the antifreeze solution to the required number of spray nozzles installed at the required locations. Therefore, initial costs and running costs can be reduced.

Further, in comparison with the spray nozzle in the conventional apparatus for spraying an antifreezing agent and an aqueous solution of a snow melting agent on a road surface, in the present invention, the spray nozzle is buried by exposing the upper surface of the nozzle body to the road surface side and the flow rate adjusting mechanism is adjusted. Since the child is exposed on the road surface side, even after the operation, the discharge amount of the antifreeze solution is quickly and easily adjusted by adjusting the flow rate adjusting mechanism from the road surface for each spray nozzle. be able to.
Therefore, since the spray discharge amount of the antifreeze solution can be quickly adjusted for each spray nozzle, the optimum amount of the antifreeze solution is adjusted on the road surface according to various conditions such as road surface gradient, road surface freezing, degree of snow coverage, road surface temperature and the like. It is possible to spray uniformly, and furthermore, it is possible to suppress excessive spraying of the antifreezing solution, so that it is possible to reduce the influence on the environment and save running costs. Furthermore, by providing a flow rate adjusting mechanism in the water chamber, the jetting power from the orifice is attenuated to stabilize the supply of the antifreezing solution to the nozzle holes, and the number of nozzle holes per spray nozzle is increased. In addition, the amount of discharge per hole can be reduced, and the spraying is realized by a method of oozing in a fan shape without jumping to the road surface. Further, even if a part of the nozzle hole is clogged, the spray can be sprayed from the remaining nozzle holes, so that more stable spraying is possible. Also, during the suspension period in summer, rainwater and sewage infiltrate from the spray nozzle exposed on the road surface to prevent clogging of the spray nozzle and pipe body, etc. Can also be blocked. Since the spray nozzle can be disassembled, even after the road surface is buried,
From the upper part of the nozzle, cleaning of clogging of the nozzle hole and cleaning or replacement of a filter for preventing clogging of the nozzle hole provided in front of the orifice valve can be performed.

Further, the spray nozzle of the present invention is characterized in that a base body connected to a water supply pipe, one or a plurality of intermediate bodies detachably connected to the upper surface side of the base body, Formed from an upper body connected to the base body through or without a body, the base body is provided with a connection water passage communicating with the water supply pipe, and the intermediate body is provided with an intermediate water passage communicating with the connection water passage A single or a plurality of nozzle holes that are opened in a specific direction in the upper body, a water chamber that communicates with the connection water channel through or not through the intermediate water channel, and the water chamber. And a flow rate adjusting mechanism built in.

[0010] With such a configuration, the spray nozzle is constituted such that one or a plurality of intermediates are interposed between the base body and the upper body, and after the spray nozzle is buried in the road, asphalt pavement or the like is cut. When the road surface level decreases, the height dimension of the spray nozzle is reduced by removing a suitable number of intermediates or all intermediates, thereby adjusting the height of the nozzle upper surface with respect to the road surface, and the spray nozzle It is possible to eliminate the risk of being projected upward and being damaged.

According to a third aspect of the present invention, there is provided a spraying system for a road surface deicing solution, wherein the spraying nozzle according to the first or second aspect is buried at predetermined intervals in a direction crossing the road. A spray pipe is connected to a branch pipe branched from a water pipe, the water pipe is connected to a tank storing an antifreezing solution, and each of the spray nozzles is installed at a position lower than a road surface to spray the road surface. A space for reserved water is secured between the nozzle and the upper surface of the nozzle.

According to the spraying system, the start and stop of the supply of the antifreeze solution are controlled under optimum conditions based on data such as the outside air temperature and the amount of snowfall from a sensor installed at a predetermined location, and automatic operation is performed. It is also possible to do
In this case, the running cost can be further reduced.

In such a spraying system,
It is also possible to install the spray nozzle at the same level as the road surface (installation so that the nozzle upper surface is at the same level as the road surface), but with such a configuration, the nozzle upper surface is directly exposed from the road surface and Since the outlet of one or a plurality of opened nozzle holes comes into direct contact with air, if the temperature drops in a water stopped state, there is a possibility that the residual water in the nozzle holes freezes and cannot be sprayed. Therefore, in the present invention, since the spray nozzle is installed at a position lower than the road surface and a space for storing water is secured between the road surface and the upper surface of the spray nozzle, the antifreezing solution is stored in the space in the water stopped state. However, since this forms a water film and covers the nozzle hole, freezing of the nozzle hole can be prevented.

In the present invention, since the space is secured above the nozzle hole, the antifreeze solution discharged from the nozzle hole is accumulated in the space, and then the opening (the road surface is opened) forming the space. Is supplied so as to overflow from the rim of the nozzle embedding opening) toward the road surface. Therefore, it is slightly influenced by the direction of forming the nozzle holes, the number of nozzles installed, the installation interval, the road surface gradient, etc., but almost uniformly in the width direction and the length direction of the road surface (in other words, toward the entire road surface area). The antifreeze solution can be sprayed efficiently and radially onto the road surface without giving the driver of the passing vehicle a feeling of psychological anxiety.

Further, in the present invention, since the above space is ensured, even if the asphalt pavement or the like is cut and the road surface level is lowered, there is little possibility that the spraying nozzle projects on the road surface and is damaged. The effect is, when the spray nozzle according to claim 2 is used, the action of the spray nozzle, ie,
By reducing the height dimension of the nozzle main body, a synergistic effect with the operation of adjusting the height of the nozzle upper surface with respect to the road surface can provide a more remarkable effect.

In the spray nozzle according to the first aspect of the present invention, the configuration according to the second aspect may be adopted, and in such a case, the synergistic effects obtained by the first and second aspects may be adopted. Thereby, a very favorable effect can be obtained.

In the present invention, the antifreeze solution is
It includes all useful for preventing road surface freezing and snow melting, such as water, hot water, and chemicals. To achieve the desired effect, well-known chemicals such as an antifreezing agent, an aqueous solution of a snow melting agent, and an antifreezing solution are the most common. It is preferably used.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. FIG. 1 schematically shows a road surface deicing solution spraying system A according to the present invention. The system A includes a plurality (three in this example) of spray nozzles 1 at predetermined intervals in a direction crossing a road T. And a branch pipe 3 branched from a water pipe 2 is connected to each spray nozzle 1, and the water pipe 2 is connected to a tank 4 storing an antifreezing solution.

Although the detailed structure of the spray nozzle 1 will be described later,
In this example, the base body 1a, the intermediate body 1b, and the upper body 1c are formed in a substantially cylindrical shape composed of three members, and a plurality of nozzle holes 5 are formed in the upper surface portion thereof, while the connection port 6 provided in the bottom surface portion is provided.
Is connected to the branch pipe 3.

The water pipe 2 is buried linearly in a direction crossing the road T. Further, the periphery of the water pipe 2 is protected by a concrete block 7 buried above the water pipe 2. However, the present invention is not limited to the concrete block, and it goes without saying that a concrete structure may be installed by casting in place. The water pipe 2
A branch pipe 3 that rises up corresponding to the installation location of each spray nozzle 1 is provided, and the upper end of the branch pipe 3 is connected to the connection port 6 on the bottom part of the spray nozzle 1 in a fitting manner.

A plurality (three in this example) of concrete blocks 7 are buried in a straight line in a direction crossing the road T, accommodate the water pipe 2 and the branch pipe 3 therein, and also have a block upper surface 7a. The spray nozzle 2 is connected to the upper end of the protruding branch pipe 3. The concrete block 7 is buried so that its upper surface 7a is located lower than the road surface T1 of the road T, and the spray nozzle 1 disposed protruding on the upper surface 7a also has its upper surface 1 'located lower than the road surface T1. To be installed.

The asphalt pavement 8 is formed on the concrete block 7 so as to be at the same level as the road surface T1, and the spray nozzle 1 is embedded in the pavement 8. The pavement 8 has an opening 9 in which the spray nozzle 1 is installed in a fitting manner, and a space 10 for storing water is secured between the road surface T1 and the spray nozzle upper surface 1 '. The opening 9 is formed such that the spray nozzle 1 is buried as described above, and the rim 9a facing the road surface T1 is tapered as shown in FIG. 2, so that the space 10 expands in a mortar shape. To

The base end side of the water pipe 2 is provided with a tank 4 installed in an exposed or buried state at the side of the road T or at a predetermined location.
Connected to. The tank 4 stores an aqueous solution of a chemical such as a well-known anti-freezing agent, snow melting agent, anti-freezing agent and the like.

Although not shown, a forced water supply means such as a pump is provided between the tank 4 and the water supply pipe 2, and the forced water supply means includes a temperature sensor, a snow cover, and a snowfall sent from a sensor provided at an appropriate position. The operation is automatically controlled by a control unit composed of a computer based on data such as the presence or absence of data.

In this embodiment, the water pipe 2 and the spray nozzles 1 are provided near the top of the slope of the road T so that the sprayed antifreeze solution (chemical solution) naturally flows down the slope. And it is formed so that it can be spread on the road surface by the traffic of the vehicle.

Hereinafter, the spraying nozzle 1 will be described with reference to FIGS. The spray nozzle 1 includes a base body 1a connected to the branch pipe 3 and one or more (one in this example) intermediate bodies 1b detachably connected to the upper surface side of the base body 1a.
And an upper body 1c connected to the base body 1a with or without the intermediate body 1b.

The base 1a is formed in a circular plate of a predetermined thickness from a predetermined metal material, a hard plastic, or the like, and is fitted to the inner bottom portion of the opening 9 so as to be fitted. At the center of the base body 1a, the connection port 6 is formed in a concave shape on the bottom side, and is fixed to the upper end of the branch pipe 3 connected to the connection port 6 by means such as welding. Further, a water passage 11 communicating with the connection port 6 is provided in a central portion of the base body 1a so as to penetrate the base body 1a in a thickness direction of the base body 1a. Is formed.

The base body 1a is provided with a screw hole 13 opening on the upper surface side of the base body 1a so as to surround the water passage 11.
A screw shaft 14a of a set screw 14 to be described later is screwed and inserted at four locations selected at every other location and at equal intervals among the screw holes 13.

The intermediate 1b is made of the same material as the base 1a, is formed into a circular plate having a predetermined thickness and the same planar shape as the base 1a, and is installed on the upper surface side of the base 1a. become. An intermediate water passage 15 communicating with the connection water passage 12 is provided at a central portion of the intermediate body 1b so as to penetrate in a thickness direction of the intermediate body 1b. The intermediate 1b includes the intermediate 1
b through the screw hole 16 in the thickness direction;
8 are formed at equal intervals and alternately at eight locations corresponding to the locations where the screw holes 13 are formed. Each screw hole 16 has a screw shaft 1 of a set screw 18 described later.
8a is screwed and inserted.

Each through hole 17 has a counterbore 17 at the upper end.
a, and a set screw 14 having the screw shaft 14a on the lower half side is inserted from above, and the screw shaft 14a
And is screwed into the screw hole 13 so that the intermediate body 1b is detachably connected to the base body 1a. Enlarged head 14b of set screw 14 is intermediate 1b
Project to the upper surface side of the.

The upper body 1c comprises a receiving frame 20 and a nozzle 30 formed of the same material as the intermediate 1b. Receiving frame 20
Is provided with a rising portion 22 along the outer edge of a circular plate portion 21 having the same planar shape as the intermediate body 1b and having a predetermined thickness, and accommodating a nozzle 30 inside the rising portion 22. And the intermediate body 1b.

On the back side of the circular plate portion 21,
7 are provided at four locations corresponding to
Then, the enlarged head 14b of the set screw 14 protruding from the upper surface side of the intermediate body 1b is fitted so as to be able to be fitted and removed. In the circular plate portion 21, through holes 24 are provided at four positions corresponding to the screw holes 16 so as to penetrate the circular plate portion 21. The set screw 18 having the screw shaft 18a on the lower half side is inserted into the through hole 24 from above.

At the center of the circular plate portion 21, the intermediate waterway 1
5 is provided so as to penetrate the circular plate portion 21. A latching step 26 is formed in the through hole 25, and an orifice 41 of a flow rate adjusting mechanism 40 described later is installed in the latching step 26.

The nozzle 30 is formed in a shape that can be loosely fitted in the space surrounded by the above-described rising portion 22.
Recesses 32 and 33 are formed in the center portion on the upper surface side and the bottom surface side, respectively, except for the partition wall 31.

The recess 32 on the bottom side is provided so as to face the through hole 25, and the recess 32 and the through hole 25 communicate the nozzle hole 5 with or without the intermediate passage. A water chamber 34 is formed. The water chamber 34 has a built-in flow control mechanism 40.

The nozzle hole 5 is formed so as to be inclined from the concave portion 32 toward the nozzle upper surface 1 ', and opens to the nozzle upper surface 1'. Further, in this example, a plurality (three) of the nozzle holes 5 are provided, and the nozzle holes 5 are provided on both the left and right sides of the center nozzle hole 5 extending in parallel with the slope gradient direction of the road T with respect to the center nozzle hole 5. The three nozzle holes 5 are arranged substantially radially by being disposed so as to extend outward. By forming in this manner, the antifreeze solution discharged from one spray nozzle 1 is sprayed in a wide-angle shape in the direction of the slope of the road T, so that the antifreeze solution can be efficiently supplied. Extremely useful.

The nozzle 30 is provided with four through holes 35 at four locations corresponding to the through holes 24 so as to penetrate the nozzle 30. The through hole 35 has a counterbore 35a at the upper end, an enlarged head 18b at the upper end, and a set screw 18 having the screw shaft 18a in the lower half. By screwing the shaft 18a into the screw hole 16, the upper body 1c is detachably connected to the intermediate body 1b.

The flow rate adjusting mechanism 40 is provided with
The orifice 41 includes an orifice 41 immovably installed in the orifice 6, a ball 43 slidably loaded in a water passage hole 42 of the orifice 41, and a flow rate adjusting bolt 44 for regulating a sliding stroke of the ball 43. The bolt 44 is screwably inserted into a screw hole provided in the partition wall 31 and inserted into the lower half water passage hole 42.
4a is accommodated in the concave portion 33 and is exposed on the spray nozzle upper surface 1 '.

In the drawing, reference numeral 50 denotes a packing provided at a necessary position for maintaining watertightness.

The spraying system A of the present embodiment configured as described above supplies water from the tank 4 to the water pipe 2 based on data such as the outside air temperature and the amount of snowfall from sensors installed at predetermined locations. (Water supply) Start, water stop, water supply amount, etc. are controlled to be performed under optimum conditions. And is discharged from each nozzle hole 5.

The antifreeze solution discharged from each nozzle hole 5 is collected in the storage space 10 and then the rim 9a of the opening 9 is formed.
Is supplied so that it overflows toward the road surface T1,
The antifreeze solution can be supplied almost uniformly and efficiently over the entire road surface. Further, in this example, a plurality of nozzle holes 5 are provided in one spray nozzle 1 and the direction of each nozzle hole 5 is changed, so that the antifreeze solution can be sprayed over a wider range, and the antifreeze solution can be more widely used. Can be sprayed efficiently.

When the supply of the antifreeze solution is stopped (water stoppage state), the antifreeze solution is stored in the reservoir space 10 and forms a water film to cover the nozzle hole 5. Can be prevented, and the next spraying can be smoothly restarted.

Further, since the bolt head 44a, which is an adjuster of the flow rate adjusting mechanism 40, is exposed on the road surface T1, the operation of adjusting the flow rate (release amount) of the antifreezing agent or the like is performed even during operation. Since it can be easily performed from above, it is possible to easily spray an appropriate amount of the antifreezing solution according to various conditions such as the degree of road surface freezing, the degree of snow accumulation and its thickness, the temperature, and the amount of snowfall.

Further, since the spray nozzle 1 is installed at a lower level than the road surface T1, even if the road surface level is lowered due to cutting of asphalt pavement or the like, the spray nozzle 1 may be projected on the road surface and damaged. Less is.

Further, by removing an appropriate number or all of the intermediates 1b, the height of the spray nozzle 1 can be reduced, so that the road surface T1 after the spray nozzle 1 is buried can be reduced to a road surface level by cutting the road surface due to pavement repair. When a situation such as drop occurs occurs, part or all of the intermediate 1b can be removed and the height of the nozzle upper surface 1 'with respect to the road surface T1 can be adjusted so as to be lowered. It is possible to avoid a situation where the projection is damaged.

To explain the operation in this case, first, the set screw 18 is loosened to remove the upper body 1c, then the set screw 14 is loosened to remove the intermediate body 1b, and then the upper body 1c is placed on the base body 1a. The upper body 1c is directly fixed to the base body 1a by directly installing and further screwing the lower end screw shaft 18a of the set screw 18 inserted into the through holes 35 and 24 into the screw hole 13. Incidentally, the reference numeral 51 in FIG.
Shows a set screw which is separately easily inserted into the screw hole 13 into which is not inserted, and its enlarged head portion 51a projects to the upper surface side of the base body 1a, and is fitted in the concave portion 23 so as to be freely detachable.

In this state, the water chamber 34 communicates directly with the connection water channel 12 without passing through the intermediate water channel 15, and the antifreeze solution supplied to the spray nozzle 1 via the branch pipe 3 passes through the connection water channel 12,
After passing through the flow rate adjusting mechanism 40, it is discharged from each nozzle hole 5 as described above.

Also in this case, the efficient provision of the antifreezing solution due to the presence of the space 10, the effect of preventing the freezing of the nozzle hole 5, and the easy operation of adjusting the flow rate can be achieved.
It goes without saying that the same effect as above can be obtained when the road surface level is lowered.

In the above embodiment, an example in which the number of the intermediates 1b is one has been described. However, the present invention is not limited to this, and two or more intermediates 1b are connected on the base 1a to form the plurality of intermediates 1b. The upper body 1c may be connected to the upper part, and an appropriate number of the intermediate bodies 1b may be removed in accordance with the pavement cutting and removal of the pavement accompanying the renovation of the pavement road surface. In this case, in the initial stage of the installation, a set screw that can connect two or more intermediate bodies 1b and the upper body 1c is used, and a plurality of setscrews that can connect the predetermined number of intermediate bodies 1b and the upper body 1c that are gradually removed are used. Prepare in advance. The number of intermediates 1b to be used depends on the thickness of the asphalt pavement 8, the installation depth of the water pipe 2, the branch pipe 3 and the like.
The required number may be set in consideration of the start-up dimension of the road, the prediction of rutting of the road surface T1 after operation, and the like.

The base body 1a, the intermediate body 1b, and the upper body 1
The means for interconnecting c is not limited to the screwing means described above. For example, an engaging means or the like provided with a convex part on one side and a concave part on the other side with which the convex part is removably engaged. It is also possible to adopt.

[0051]

As described above, according to the spray nozzle and the road surface deicing solution spraying system using the same according to the present invention, a conventional road heating system and a road surface deicing agent and a snow melting agent spraying device are used. The following remarkable effects are achieved in comparison with the above.

According to the spray nozzle of the first aspect, the controller of the flow rate adjusting mechanism is exposed on the road surface side as compared with the conventional spray nozzle of the apparatus for spraying the anti-freezing agent and the snow melting agent on the road surface. Adjustment of flow rate (release amount) of deicing agent etc. can be easily performed from the road surface even in the middle, so appropriate amount according to various conditions such as freezing of the road surface, degree of snow accumulation, its thickness, temperature, snowfall amount etc. Can be sprayed, thereby enabling high-efficiency and low-cost winter road surface management.

According to the spray nozzle of the first aspect,
By providing a plurality of nozzle holes in one spray nozzle and adjusting the direction of each nozzle hole, the antifreeze solution can be sprayed over a wider range, and the antifreeze solution can be sprayed more efficiently.

According to the spray nozzle of the second aspect, the height of the nozzle body can be reduced by removing an appropriate number of intermediates or all intermediates, so that the road surface after the nozzle is buried is accompanied by pavement repair. When a situation where the road surface level is lowered due to road surface cutting or the like occurs, part or all of the intermediate body can be removed and the height of the nozzle upper surface with respect to the road surface can be adjusted so that the nozzle body is placed on the road surface It is possible to avoid a situation where the projection is damaged.

According to the road surface deicing solution spraying system of the third aspect, a space for storing the deicing solution is secured between the road surface and the upper surface of the spray nozzle, so that the following advantages are obtained.・ Anti-freeze solution released from each nozzle hole is supplied to the road surface after it accumulates in the reservoir space and then overflows from the rim of the opening to the road surface, so that the efficiency is almost even across the entire road surface It can supply antifreeze solution well.・ When the supply of the antifreeze solution is stopped (water stoppage state), the antifreeze solution is stored in the reservoir space, which forms a water film and covers the nozzle hole, so that the nozzle hole can be prevented from freezing. , The next spraying can be smoothly resumed.・ Even if rutting occurs on the asphalt pavement after service and the road surface level is lowered, the height of the spray nozzle can be lowered by removing the intermediate, so that the spray nozzle protrudes on the road surface and is damaged. Is less likely to occur.

Further, the spray nozzle of the present invention and the system for spraying a road surface freezing prevention solution using the same can reduce initial cost and running cost as compared with a conventional road heating system, and are economically excellent in road surface freezing prevention. A system can be provided. Furthermore, compared to the conventional road surface deicing agent and snow melting agent spraying device, the amount of sprayed antifreeze solution can be easily adjusted from the road surface, so the optimum spraying amount management corresponding to changes in service conditions, etc. Since the excessive spraying of the prevention solution can be suppressed, there are many effects such as a reduction in the influence on the environment and an effective and lower-cost road surface management in winter.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of an embodiment of the present invention, in which main parts are enlarged and represented.

FIG. 2 is an enlarged sectional view taken along the line (I)-(I) of FIG.

FIG. 3 is a sectional view taken along the line (II)-(II) in FIG. 2;

FIG. 4 is a sectional view taken along the line (III)-(III) in FIG. 2;

FIG. 5 is a sectional view taken along the line (IV)-(IV) in FIG. 2;

FIG. 6 is a longitudinal sectional front view showing a state in which the height of a spray nozzle is adjusted.

[Explanation of symbols]

 A: Road surface freezing prevention solution spraying system 1: Spray nozzle 1 ': Nozzle upper surface 1a: Base body 1b: Intermediate body 1c: Upper body 2: Water pipe 3: Branch pipe 4: Tank 5: Nozzle hole 6: Connection port 9 : Opening 10: Space 12: Connecting channel 15: Intermediate channel 34: Water chamber 40: Flow control mechanism 44 a: Bolt head (controller) T: Road T1: Road surface

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yutaka Wada 3-1-1 Kyobashi, Chuo-ku, Tokyo Taisei Rotech Co., Ltd. (72) Inventor Haruo Kawai 3-700 Miyaharacho, Omiya City, Saitama Prefecture Inside the Omiya factory

Claims (3)

[Claims] Claims: 1. A single or a plurality of nozzle holes opening in a specific direction, a connection port connected to a water supply pipe, a water chamber communicating the connection port with the nozzle hole, and a built-in water chamber. A spray nozzle comprising: a flow rate adjusting mechanism; and an adjuster of the flow rate adjusting mechanism provided on the upper surface side of the nozzle body in an exposed manner. 2. A base body connected to a water supply pipe, and one or more intermediate bodies detachably connected to an upper surface side of the base body,
An upper body connected to the base body with or without the intermediate body, wherein the base body is provided with a connection water passage communicating with the water supply pipe, and the intermediate body is provided with an intermediate water passage communicating with the connection water passage. Provided in the upper body, a single or a plurality of nozzle holes that open in a specific direction, a water chamber that communicates with the connection water channel with or without the intermediate water channel through the intermediate water channel, Spray nozzle with a flow control mechanism built into the chamber. 3. A spray nozzle according to claim 1 or 2 is buried at predetermined intervals in a direction crossing a road, and a branch pipe branched from a water pipe is connected to each spray nozzle. Wherein the water pipe is a road surface anti-freeze solution spraying system connected to a tank storing the anti-freeze solution, wherein each of the spray nozzles is installed at a position lower than the road surface and between the road surface and the spray nozzle upper surface. A system for spraying a road surface freezing prevention solution, wherein a space for reserved water is secured in the area.