JP6284235B2 - Spray nozzle device - Google Patents

Description

  The present invention relates to a spraying method for spraying and covering a slope (slope) with a spray material (for example, mortar) or a vegetation base material to stabilize the slope.

Conventionally, a spraying method for spraying a spray material (for example, mortar) or a vegetation base material onto a slope to cover the slope and thereby stabilizing the inclined surface has been widely performed.
Here, when mortar is used as the spraying material (mortar spraying method), if the spraying surface is dry and water absorption is high, water is sprayed in advance and the spraying surface is moistened properly. It is necessary to prevent moisture from the mortar prepared and blended from being absorbed by the dry slope.
When the mortar sprayed on the dry spray surface is deprived of moisture (on the dry spray surface), the moisture contained in the sprayed mortar is insufficient, and as a result, the coating with the sprayed mortar This is because the quality of the layer deteriorates and cracks occur in the mortar coating layer.

As a method of performing flooding in advance (on a dry spray surface), there is a method of spraying water by discharging water from a spray nozzle of mortar prior to spraying mortar. Further, there is a method in which water is sprayed by an operator different from the operator who sprays the mortar immediately before the mortar spraying or in parallel with the mortar spraying.
However, in the method of flooding prior to spraying the mortar, the flooded slope is dried immediately, so the effect of the flooding is demonstrated as time elapses between the flooding and the mortar spraying. It will not be done.
On the other hand, in the method of flooding by a worker other than the worker who sprays the mortar, since the number of workers required for the spraying operation increases by one, the construction cost increases accordingly. Exists.

Moreover, in the mortar spraying method, when the sprayed mortar bounces off the spray surface (when rebounding), the thickness of the coating layer (spray layer) by the spray material becomes a predetermined dimension (thickness dimension). There is a problem that must not be. Moreover, in the place (place where the spray material bounced) where the rebound spray material (mortar) adhered, the spray surface becomes non-uniform | heterogenous by the said rebound spray material, and the quality will fall.
Therefore, in the mortar spraying method, it is necessary to reduce the rebound of the sprayed mortar. As a method to reduce the rebound of mortar, a rebound reducing material (for example, a thickener) is mixed during mortar production to increase the viscosity of the spray material (mortar), or to the spray material in the spray nozzle. There is a method of adding a rebound reducing material (for example, a quick setting material).
However, when a thickener is mixed at the time of mortar production, the viscosity of the material increases, so that the pumpability is lowered and the construction efficiency is lowered. On the other hand, in the method in which the quick setting material is added in the spray nozzle, the quick setting material may react with the mortar in the nozzle and solidify, thereby blocking the nozzle.

In the case of using a vegetation base material as a spraying material (vegetation base material spraying method), it is known that rebound can be reduced by adding water at the time of the material. However, when the amount of water added is increased and the viscosity of the vegetation base material is increased, there is a risk that the pumping system (hose or the like) may be blocked.
Therefore, in the vegetation base material spraying method, the amount of water that can be added for rebound reduction is limited, and water cannot be contained in the vegetation base material to the extent that rebound is sufficiently reduced. And if the rebound of the sprayed vegetation base material is not reduced, the rebound vegetation base material becomes dust, which causes a problem of reducing the working environment.

Moreover, in the spraying method of the vegetation base material, there are problems of early germination and growth. In the vegetation base material spraying method, it is preferable that the seeds of the plants sprayed on the spray surface mixed with the vegetation base material germinate and grow at an early stage, and whether the spray surface suitably greens. It has a great influence on whether or not.
In order to germinate the mixed seeds at an early stage, a seed dormancy breaking process (for example, a process of immersing seeds in hydrogen peroxide solution to accelerate germination) or a seed water supply process is performed. And when dormancy breaking processing and water supply processing are performed, germination of seeds is accelerated. However, the growth of the plant after being sprayed on the slope (spraying face) depends on the state of the vegetation base material, and under the condition of easy drying like the slope, there is a risk that it will die even if it germinates. There is.
There is a method of mixing a water retention material such as a water-absorbing polymer into the vegetation base material in order to prevent the germinated plants from dying, but the construction cost increases due to the high material cost. A method of adding water to the vegetation base material in advance is also conceivable, but as the amount of water added is increased as described above, the viscosity of the vegetation base material increases, and there is a possibility that the pumping system (hose, etc.) may be blocked. It is difficult to contain a sufficient amount of water for plant growth.

Furthermore, in the vegetation base material spraying method, there is a problem with the use of a bonding agent (erosion inhibitor).
There are mainly two types of bonding agents used for vegetation base materials: liquid type and powder type. Here, the liquid-type bonding agent has a high viscosity, and there is a possibility that the hose in the pressure feeding path is blocked. Further, the liquid type bonding agent has a problem that it is not uniformly stirred with other raw materials of the vegetation base material. Therefore, many powder type bonding agents are used as bonding agents for vegetation base materials.
However, the powder-type bonding agent reacts with water and exerts its effect. However, as described above, if the water content of the vegetation base material is increased, water and solids may separate and block the pumping path (hose etc.). There is. For this reason, the amount of water added in the vegetation base material is limited, so that the powder-type bonding agent cannot sufficiently react with the water in the vegetation base material. As a result, in the powder type bonding agent, it often takes time until the effect is exhibited, and the vegetation base material is often eroded by rain.

As other conventional techniques, techniques in which various additives are added, mixed, and ejected from a nozzle have been proposed (for example, see Patent Documents 1 to 4).
However, these conventional techniques (Patent Documents 1 to 4) all add and mix various additives on the upstream side of the nozzle, so that the material is separated inside the nozzle and the flow path in the nozzle is blocked. There is a risk that. Therefore, it is impossible to eliminate the above-described problem.

Japanese Patent No. 3456418 Japanese Patent No. 4937541 Japanese Patent No. 3447239 JP 2000-120268 A

  The present invention can solve the above-mentioned problems of the prior art, performs appropriate and sufficient water supply to the spraying surface, reduces the rebound of the spraying material, and does not cause the blockage of the pumping path, and spraying It aims at providing the spray nozzle apparatus which can maintain the quality of a surface.

The spray nozzle device (1) of the present invention includes a spray nozzle (2) for spraying a spray material (M: mortar, vegetation base material, etc.), and a peripheral portion of the spray nozzle (2) ( An annular member (3) disposed radially outward), a plurality of liquid injection nozzles (4: nozzles disposed on the annular member 3) disposed on the annular member (3), and an annular shape A liquid (L: water, rebound reducing material) supply system (6) communicating with the plurality of liquid injection nozzles (4) via the member (3);
The liquid for injection nozzle (4: annular nozzle disposed member 3) injects the liquid into atomized (spray) a function and a function of changing the injection (spray) direction, spraying material ( M) is a vegetation base material, the liquid (L) ejected from the plurality of liquid ejection nozzles (4) is water, and partial ejection (spraying) of the plurality of liquid ejection nozzles (4) The direction is toward the radially inner side of the annular member (3) (the side of the spray material M sprayed from the spray nozzle 2), and the other sprays (sprays) of the plurality of liquid spray nozzles (4) It is comprised so that the direction may face toward the slope (S) side (area | region R side of the slope S which should spray the blowing material M).

In the spraying method of the present invention, spraying material (for example, mortar, vegetation base material, etc.) is sprayed from the spray nozzle (2), and is disposed in the periphery (radially outward) of the spray nozzle (2). has been an annular member (3) injection nozzle for multiple liquid provided (4: annular member arranged nozzles) from the liquid (L: water, rebound reducing material) was injected in atomized (spray The vegetation base material (spraying material M) is ejected from the spray nozzle (2), water (liquid L) is sprayed (sprayed) from the plurality of liquid spray nozzles (4), and the plurality of liquids The water (liquid L) sprayed (sprayed) from a part of the spray nozzle (4) is directed radially inward of the annular member (3) (on the side of the spray material M sprayed from the spray nozzle 2). Sprayed (sprayed) and sprayed from the other of the plurality of liquid spray nozzles (4) The water to be fogged is configured to be sprayed (sprayed) toward the slope (S) side (the region R side of the slope S where the spray material M is to be sprayed).

According to the present invention having the above-described configuration, a spray material (M: for example, mortar) is discharged (injected), and at the same time, a liquid spray nozzle (4: annular shape) disposed around the spray nozzle (2). Water (Liquid L) is sprayed from the nozzle disposed on the member 3, and the range is −30 ° starting from the nozzle in the lower region (for example, the horizontal center line of the annular member 3 shown in FIG. 5) By limiting to the liquid injection nozzle 4) arranged in a range of ˜−150 °, water is sprayed only in the region (R) to be sprayed immediately before spraying, and water is directly applied to the mortar immediately after spraying. There is no end to it. And since a spray material (M) is sprayed so that the location where water was discharged (sprayed) is followed, a required amount of water can be sprayed to the area | region (R) just before spraying.
Therefore, even if the slope (S) that is the spray surface is dry, the moisture in the spray material (M) is not absorbed by the slope (S), and the quality of the sprayed mortar is reduced. Without generating cracks in the sprayed mortar coating layer.
As a result, in the slope (S) where flooding is required, it becomes possible for a single operator to spray and flood the water at the same time, without impairing construction efficiency and economy, and mortar is sprayed. The desired quality of the mortar coating layer can be maintained.

According to the present invention, the spray material (M: for example, mortar) is discharged (injected), and at the same time, the liquid spray nozzle (4: disposed in the annular member 3) disposed around the spray nozzle (2). Water or rebound reducing material (liquid L) can be discharged (sprayed) from the nozzle.
That is, since the water or the rebound reducing material is ejected (sprayed) in a mist form from the liquid spray nozzle (4: nozzle disposed on the annular member 3), the spray sprayed from the spray nozzle (2). When the adhesive material (M) passes through the (sprayed) water or the mist of the rebound reducing material, the water or the rebound reducing material can be surely combined on the surface of the spray material (M).
When the water (liquid L) is collected, the particle surface of the spray material (M) is wetted, and the spray material (M) is likely to adhere to the slope (S), thereby reducing rebound. Alternatively, the rebound is suppressed by the thickening material or the quick setting material (liquid L) attached to the particle surface of the spray material (M).
As a result of suppressing rebound, the situation where the thickness of the spray layer does not reach the predetermined thickness is prevented, and the quality of the place where the rebound spray material (M) falls (the place where the spray material M bounces). Is prevented from falling.

In the present invention, by directing the spray angle of the liquid spray nozzle (4) slightly inward of the annular member (3) (the spray material M sprayed from the spray nozzle 2), the spray nozzle The spray material (M) sprayed from (2) surely passes through the mist of the sprayed water or the rebound reducing material (liquid L) to reduce rebound on the surface of the spray material (M). The materials can be put together.
When the present invention is applied to the vegetation base material spraying method, the direction (spraying direction) of some of the plurality of liquid spray nozzles (4) is set to the radially inner side (spraying) of the annular member (3). The direction of the other nozzles (spraying direction) is the slope (S) side (the region R side of the slope S where the spray material M is to be sprayed). By doing so, suppression of rebound of the spray material and dust countermeasure can be achieved at the same time.

As described above, according to the present invention, in the mortar spraying method, there is no need to mix and add the rebound reducing material (liquid L) inside the spray nozzle, and therefore there is a risk of blocking the flow path in the nozzle. Sex is lost. Therefore, it is possible to use a rebound reducing material without degrading the workability.
Further, in the vegetation base material spraying method, the liquid spray nozzles arranged around the spray nozzle (2) (4: disposed outside the spray nozzle (2) by the nozzle disposed in the annular member 3). Since the water (liquid L) is added by the nozzle), there is no need to consider adding water to the spray material (M) before the jetting from the spray nozzle (2). That is, since water is added and the vegetation base material adheres to the slope, there is no need to consider adding water. Therefore, a vegetation base material having a water content suitable for pumping can be pumped as it is.
As a result, workability is improved because the spray material (M) may be pumped with a water content that does not clog without considering the amount of water to be added.
In addition, as described above, the rebound can be greatly reduced and the generation of dust can be reduced, so that the working environment at the construction site of the spraying method is greatly improved.

As described above, according to the present invention, since the water (liquid L) is sprayed from the annular member (3) attached to the peripheral portion of the spray nozzle (2), in the sprayed vegetation base material By increasing the water content of the seeds, germination of seeds in the vegetation base material can be promoted.
That is, by spraying water from the liquid injection nozzle (4) at the same time as spraying (material discharge), the water content of the vegetation base material is limited (the water content increases, thereby increasing the viscosity of the vegetation base material). In order to eliminate the possibility of blockage of the pumping path, the water content should be less than the predetermined amount), and even if there is no influence on the workability of the spraying method, it was sprayed on the slope (S). The moisture content of the vegetation base material can be greatly increased. As a result, early germination and growth of the mixed seed can be expected.
In addition, germination can be promoted in combination with seed dormancy breaking treatment and seed water absorption treatment.

Furthermore, according to this invention, the powder contained in the spraying material (M) by spraying water (liquid L) from the annular member (3) attached to the peripheral part of the spraying nozzle (2). Sufficient water can be added to the spray material (M) for the body type bonding agent to exert its effect.
As described above, according to the present invention, even if there is a restriction on the water content of the vegetation base material, the vegetation base material sprayed on the slope (S) without affecting the workability of the spraying method. Since the water content ratio of the powder can be greatly increased, the reaction of the powder-type bonding agent proceeds and the effect of preventing erosion is exhibited at an early stage.

It is explanatory drawing which shows the outline | summary of embodiment of this invention. It is a side view of the spray nozzle apparatus which concerns on embodiment of this invention. It is a front view of the spray nozzle apparatus shown in FIG. It is explanatory drawing which shows the principal part of the spray nozzle apparatus which concerns on embodiment. It is a front view explaining the effect of the spray nozzle apparatus which concerns on embodiment. It is a side view explaining an effect with FIG. It is a side view explaining the effect different from FIG. 5, FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
In FIG. 1, in the spray nozzle device shown as a whole by the reference numeral 1, the spray material M is sprayed from the spray nozzle for spray material from the portion indicated by the reference numeral 2, and at the same time the peripheral part (spray of spray material M The liquid L is ejected from a location indicated by reference numeral 4 in a radially outward region of the location 2. Here, the liquid L is water, a rebound reducing material, or the like, and is a liquid that is preferably added to the spray material M.
The liquid (L: water, rebound reducing material, etc.) ejected from the peripheral part 4 of the spray nozzle is not sprayed as a strong jet, for example, a jet jet, but is sprayed in the form of a mist. Therefore, the spray material M (mortar and vegetation base material) is not divided or damaged by the liquid L (water, rebound reducing material, etc.) sprayed from the peripheral portion 4.

In order to realize the state shown in FIG. 1, the illustrated embodiment has a structure as shown in FIGS.
The part shown by the code | symbol 2 in FIG. 1 is a spray nozzle for injecting the spray material M (For example, mortar, a vegetation base material, etc.) in FIG. 2, FIG. In FIG. 1, a portion denoted by reference numeral 4 is a plurality of liquid injection nozzles (nozzles disposed on the annular member 3) disposed on the annular member 3 in FIGS. 2 and 3.
A metal annular member 3 is provided on the periphery (radially outward) of the spray nozzle 2, and the liquid injection nozzle 4 is attached to the annular member 3.

In FIG. 3, six attachment points of the liquid injection nozzle 4 are formed on the annular member 3, and three attachment nozzles 4 for liquid and three plugs 5 are provided at the six attachment points. It is attached.
Here, the plug 5 is a plug member provided to block a portion where the liquid injection nozzle 4 is not attached, and water, a rebound reducing material, etc. leak from the portion where the liquid injection nozzle 4 is not attached. Is prevented.

A liquid supply system 6 is connected to the annular member 3 via a pipe connector 7, and a liquid L (see FIG. 1: water, rebound) is supplied to the liquid injection nozzle 4 via the liquid supply system 6 and the annular member 3. Reducing material). The annular member 3 is provided with a supply pipe (not shown) that communicates the liquid supply pipe 6 with the plurality of liquid injection nozzles 4.
Although not shown, the spray nozzle 2 communicates with a spray material supply source (not shown), and the spray material M is supplied. The liquid supply pipe 6 communicates with a liquid supply source (not shown) that is not shown, and is supplied with water, a rebound reducing material, and the like.

As clearly shown in FIG. 3, the liquid injection nozzle 4 has a central angle at the center point of the annular member 3 and the spray nozzle 2 on the annular member 3 on the outer side in the radial direction of the spray nozzle 2. Are arranged at six positions so that the angle becomes every 60 ° (at equal intervals). In other words, the annular member 3 is formed with six attachment points of the liquid injection nozzles 4, and when spraying, the liquid injection is applied only to the portions where spraying of water, a rebound reducing material or the like is necessary. The nozzle 4 is attached, and other portions are closed with plugs 5. A supply system (not shown) from the liquid supply pipe 6 communicates with a place where the liquid injection nozzle 4 or the plug 5 is attached (attachment place of the liquid injection nozzle 4).
In the example of FIG. 3, the liquid injection nozzle 4 is attached to three places every other place among the six attachment places, and the other three places are closed with plugs 5. The illustrated embodiment is not limited thereto, and there is a case where the liquid injection nozzle 4 is attached only to the lower half of the annular member 3 in FIG. 3 and the upper half of the annular member 3 is closed by the plug 5. Alternatively, there is a case where the liquid injection nozzles 4 are attached to all attachment locations.

Although not clearly shown, the liquid injection nozzle 4 is attached to the annular member 3 by a ball joint mechanism (not shown). Therefore, the spray direction of the liquid L can be set freely. The direction of spraying from the liquid injection nozzle 4 will be described later with reference to FIG.
In FIG. 2, the pipe connector 7 to which the liquid supply pipe 6 is connected is bent at a right angle, but the liquid sprayed from the liquid injection nozzle 4 (L: water, rebound reducing material, etc.) is relatively Since the discharge pressure is low, loss (fluid resistance) due to bending at the pipe connector 7 can be ignored.

The specific structure of the nozzle device 1 will be further described with reference to FIG.
In FIG. 4, an annular bracket 10 is attached to the annular member 3, and the annular member 3 is attached to the spray nozzle 2 via the bracket 10. An end face 10 e of the annular bracket 10 is fixed to the annular member 3 by welding w, and the annular bracket 10 is fixed to the spray nozzle 2 by a fastening member 11.
In the example of FIG. 4, the annular member 3 is provided with the liquid injection nozzle 4 and an attachment portion closed with a plug 5.
In FIG. 4, the liquid supply pipe 6 includes a liquid hose 8 and an open / close valve 9 interposed in the liquid hose 8.

Although not shown, the liquid injection nozzle 4 has a ball joint mechanism and has a function of freely changing the direction in which the liquid L is sprayed (spray direction).
For example, the direction of spraying (spraying) the liquid L can be set independently for each liquid spray nozzle 4 within a range of 45 ° to 60 ° (symbol θ) with respect to the central axis LC of the liquid spray nozzle 4. It is.

Next, with reference to FIGS. 5-7, the effect of the nozzle apparatus 1 shown in FIGS. 1-4 is demonstrated.
First, with reference to FIG. 5 and FIG. 6, the case where the nozzle device 1 shown in FIGS. 1 to 4 is applied to the flooding in the case where the spraying surface in the mortar spraying work is dry and the water absorption is high will be described. To do. In this case, the liquid L sprayed from the liquid injection nozzle 4 is water.
As shown in FIG. 5, when the illustrated embodiment is applied to flooding when the spray surface is dry and water absorption is high, the liquid injection nozzle 4 has six attachment points on the annular member 3. Among them, the lower half (the region below the horizontal line H in FIG. 5) is attached only to three places, and the other three attachment points (the attachment points in the region above the horizontal line H in FIG. 5) are plugs 5. It is blocked by.

In FIG. 5, three liquid injection nozzles 4 pass through the center of the liquid injection nozzle 4 and a straight line (indicated by a one-dot chain line in FIG. 5) extending in the radial direction of the annular member 3 forms a horizontal line H. The angle is arranged in the range of −30 ° to −150 °. Here, “-” means that the three liquid injection nozzles 4 are positioned below the horizontal line H.
In other words, the three liquid injection nozzles 4 shown in FIG. 5 are arranged in a range of −30 ° to −150 ° with the horizontal center line H as a starting point.

5 and 6, each of the three liquid injection nozzles 4 attached to the lower half of the annular member 3 (the region below the horizontal line H in FIG. 5) is The direction in which L (FIG. 6) is sprayed is a direction radially outward of the annular member 3, and a region R (FIG. 6) in which water L is sprayed on the spray surface S (FIG. 6) It is set so as to be lower (lower left direction in FIG. 6) than the region MS where the mortar M is sprayed on the attaching surface S.
The water L spray directions in the three liquid injection nozzles 4 are different from each other.

In FIG. 6, the mortar M is sprayed from the spray nozzle 2 of the spray nozzle apparatus 1 with respect to the slope S (spray surface) used as the object of mortar spraying. In FIG. 6, the area | region where the mortar M is sprayed is shown with the code | symbol MS.
Simultaneously with the spraying of the mortar M, water L is respectively discharged from the liquid spray nozzles 4 (three liquid spray nozzles 4 in the region below the horizontal line H in FIG. 5) arranged around the spray nozzle 2. The water is sprayed toward a region R slightly below the slope S (lower left direction in FIG. 6).
Here, in the mortar spraying work, the mortar M is sprayed in the direction of arrow A in FIG. Therefore, as shown in FIG. 6, when the mortar M is sprayed and the water L is sprayed simultaneously, the mortar M is sprayed onto the region R immediately after the water L is sprayed prior to the region R. become.

Therefore, as shown in FIG. 6, when the mortar M is sprayed and the water L is sprayed, immediately after the water L is sprayed, the water L is chased and the mortar is sprayed on the region R sprayed with the water L. Since M is sprayed, it is possible to perform water dripping to the extent that the slope S does not absorb moisture from the mortar M, that is, the necessary amount of water pouring in the region immediately before the mortar M is sprayed.
Therefore, even if the slope S, which is the spray surface, is dry, moisture in the spray material M is not absorbed by the slope S, and a sufficient moisturizing state can be realized, such as sprayed mortar, etc. It is possible to suppress the occurrence of cracks in the coating layer of the sprayed mortar due to the deterioration of the quality.
Further, water L is not sprayed on the mortar M immediately after spraying (the mortar covering the region MS), and the water is sprayed on the mortar M immediately after spraying, so that Mortar does not flow out and the quality of the part does not deteriorate.

Furthermore, since the mortar M is sprayed and the water L is sprayed by the single nozzle device 1, the mortar M and the water L are reliably sprayed by a single operator on the slope S requiring drowning. Can be done.
As a result, it is not necessary to perform the work by two workers, the worker who sprays the mortar M and the worker who floods, and it is possible to prevent the construction efficiency and the economy from being lowered.

FIG. 7 mainly describes the case where the illustrated embodiment is used to solve the problem of reducing the rebound of the spray material.
In the spraying work shown in FIG. 7, mortar, vegetation base material and the like are sprayed toward the slope S from the spray nozzle 2 of the spray nozzle device 1. At the same time, from the liquid injection nozzles 4 (in the case of FIG. 7, six liquid injection nozzles 4 attached at six locations on the annular member 3) in the radially outward region of the spray nozzle 2. The liquid L is sprayed with a rebound reducing material.
As described above, the rebound reducing material is, for example, a thickener or a quick setting material for mortar, and is, for example, water for a vegetation base material.

In FIG. 7, the spraying direction from the liquid injection nozzle 4 is appropriate to the inside in the radial direction of the annular member 3 (the side of the spray material M sprayed from the spray nozzle 2) by a ball joint mechanism (not shown). It is set in the direction to go at an angle. This is to ensure that the rebound reducing material L sprayed (sprayed) in a mist and the sprayed spray material M are mixed with each other.
In FIG. 7, the rebound reducing material L may be sprayed from all of the six liquid injection nozzles 4, or only five or less liquid injection nozzles 4 may be used depending on the situation of the construction site. good.

In FIG. 7, when the spray material M (for example, mortar, vegetation base material) sprayed toward the slope S from the spray nozzle 2 passes through the mist of the sprayed rebound reducing material L. The surface (of the spray material M) collects the fine particles of the rebound reducing material L, or the surface of the spray material M or a part thereof is covered with the fine particles of the rebound reducing material L.
When the fine particles of the rebound reducing material L are collected on the surface of the spray material M (the surface of the spray material M or a part thereof is covered with the fine particles of the rebound reducing material L), When colliding with the surface S, the spray material M and the rebound reducing material L are mixed, and the rebound is reduced. For example, if the spray material M is a mortar and the rebound reducing material L is a thickening material or a quick setting material, the mortar M easily adheres to the slope S, so that rebound is reduced (suppressed).
As a result of suppressing the rebound, a situation where the thickness of the spray layer does not reach a predetermined thickness due to the rebound of the spray material M is prevented, and the place where the rebound spray material M adheres (the spray material M splashes). The situation where the quality of the place is reduced is also prevented.

In FIG. 7, when the spray material M is a vegetation base material, if water is added as the rebound reducing material L, the surface of the vegetation base material passes when the vegetation base material passes through the area sprayed with water in a mist form. The fine particles of the rebound reducing material L are gathered together (the surface of the spray material M or a part thereof is covered with the fine particles of the rebound reducing material L).
By attaching the fine particles of the rebound reducing material L to the surface of the vegetation base material, the vegetation base material is hydrated when sprayed on the slope S, and the rebound is the same as when water is added to the vegetation base material. Preventive effect occurs.

In FIG. 7, the rebound reducing material L is sprayed in the direction of the spray material M from all the liquid injection nozzles 4, but a part of the liquid injection nozzle 4 (for example, above the horizontal line H in FIG. 5). The direction of the three liquid spray nozzles 4 in the region is radially inward (the side of the spray material M sprayed from the spray nozzle 2), but other liquid spray nozzles 4 (for example, FIG. 5). The spray direction from the three liquid spray nozzles 4 in the region below the horizontal line H is the slope S side (sprayed water L sprayed from the spray nozzle 2) on the radially outer side of the annular member 3. Direction in which the spraying material M is not mixed).
For example, in the case where the spray material M is a vegetation base material, if water sprayed from a part of the liquid injection nozzle 4 is directly sprayed on the slope S, it is effective for dust countermeasures. Therefore, rebound suppression of the sprayed vegetation base material and dust countermeasure can be achieved at the same time.

As shown in FIG. 7, if the spraying is performed with the nozzle device 1, it is not necessary to mix and add the rebound reducing material L inside the spraying nozzle 2, so that the pumpability is reduced due to an increase in the viscosity of the spraying material M. In addition, blockage of the flow path in the spray nozzle 2 due to consolidation of the spray material M is prevented.
Moreover, since the fine particles of the rebound reducing material L are collected on the surface of the spray material M (the surface of the spray material M or a part thereof is covered with the fine particles of the rebound reducing material L), the rebound is reliably reduced. Is done.
As a result, improvement in workability and suppression of rebound are achieved at the same time.

In FIG. 7, when water is sprayed from the liquid spray nozzle 4, it is not necessary to add excessive water to the spray material M at a stage before the spray material M is sprayed from the spray nozzle 2. As a result, when the blowing material M being pumped is a vegetation base material, the viscosity of the vegetation base material does not increase, and the hose or the like is not blocked. As a result, the spray material M (mortar, vegetation base material) adjusted to an appropriate water content for pumping can be pumped with the appropriate water content, and workability is improved.
In addition, as described above, the rebound can be greatly reduced and the generation of dust can be reduced, so that the working environment at the construction site of the spraying method is greatly improved.

In FIG. 7, as described above, when water is sprayed from the plurality of liquid injection nozzles 4 arranged in the periphery of the spray nozzle 2 and the spray material M is sprayed on the slope S, The water content can be increased.
Therefore, if the spray material M is a vegetation base material, the water content in the vegetation base material when sprayed on the slope S is increased by spraying water from the liquid injection nozzle 4 to increase the water content in the vegetation base material. Germination of seeds in wood can be promoted.
In that case, it is not necessary to increase the water content before the vegetation base material is supplied to the spray nozzle 2 as described above, and it is possible to prevent the viscosity of the vegetation base material from increasing in the pumping path. The blockage of the pressure feeding path is prevented.
Here, germination is further promoted by combining with seed dormancy breaking treatment or seed water absorption treatment.

Furthermore, if the spray material M is a vegetation base material, in FIG. 7, water is sprayed from the plurality of liquid spray nozzles 4 arranged in the peripheral portion of the spray nozzle 2, and the vegetation base material is applied to the slope S. The water content when sprayed can be increased.
Therefore, if a powder type bonding agent is included in the vegetation base material, water sufficient for the powder type bonding material to exert an effect is applied to the vegetation base material sprayed on the slope S. include. Therefore, the reaction of the powder-type bonding agent proceeds, and the effect of preventing erosion is exhibited at an early stage, and erosion of the vegetation base material due to rain is prevented.

It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.
For example, in the illustrated embodiment, the annular member 3 has six attachment points for the liquid injection nozzle 4, but may be five or less or seven or more. There is no particular limitation on the number of attachment points of the liquid injection nozzle 4 in the annular member 3. Similarly, the number of liquid jet nozzles 4 in FIG. 7 is not particularly limited.
Further, in FIG. 6, three liquid jet nozzles 4 are attached to the annular member 3 and the water L is sprayed. However, even in the case shown in FIG. 6, the number of liquid jet nozzles 4 is not limited to three. Absent.

DESCRIPTION OF SYMBOLS 1 ... Spray nozzle apparatus 2 ... Spray nozzle 3 ... Ring member 4 ... Liquid injection nozzle 5 ... Plug 6 ... Liquid supply system 7 ... Piping connector 8・ ・ Liquid hose 9 ... Open / close valve 10 ... Bracket 11 ... Fastening member M ... Spraying material (mortar, vegetation base material, etc.)
L ... Liquid (water, rebound reducing material, etc.)
S ... Slope (spraying surface)
R: Area where spray material should be sprayed

Claims (2)

A spray nozzle for spraying the spray material, an annular member disposed in the periphery of the spray nozzle, a plurality of liquid spray nozzles disposed on the annular member, and a plurality via the annular member A liquid supply system communicating with the liquid injection nozzle of
The liquid spray nozzle has a function of spraying liquid in a mist form and a function of changing the spray direction, the spray material is a vegetation base material, and the liquid sprayed from the plurality of liquid spray nozzles is water. The injection direction of a part of the plurality of liquid injection nozzles is directed radially inward of the annular member, and the other injection directions of the plurality of liquid injection nozzles are directed to the slope side. A spray nozzle device characterized by. The spraying material is sprayed from the spraying nozzle, and the liquid is sprayed in a mist form from a plurality of liquid spraying nozzles provided on the annular member disposed around the spraying nozzle. The base material is sprayed, water is sprayed from the plurality of liquid spray nozzles, and water sprayed from a part of the plurality of liquid spray nozzles is sprayed radially inward of the annular member, Water sprayed from the other of the liquid spray nozzles is sprayed toward the slope side .

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