JP7152905B2 - Apparatus and method - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention is a technique applied to, for example, a spraying method.

A covering material layer is provided on a bedrock, ground, or a structure (the member thereof) or the like. The purpose of providing the dressing layer is varied. For example, it is intended to improve strength, improve durability, improve fire resistance, improve fire resistance, improve sound absorption, and/or provide heat insulation. Examples of the covering material include fireproof covering materials such as rock wool and sprayed rock wool consisting of cement and water. For example, it is concrete or mortar. Then, the coating material is provided (covered) at a desired location (a desired location, for example, on a base surface) by a spraying method or the like.

A part of the material constituting the coating material is liquefied (fluidized) (or liquid is used), and the main component of the coating material discharged (or discharged) from the discharge port at the tip of the pressure feed path An additive material (the liquefied (fluidized) material (or liquid)) that constitutes the coating material (or filler) is added to the material (main material) alone (or mixture) in the vicinity of the discharge port. (mixed).

A part of the material constituting the coating material is liquefied (fluidized) (or liquid is used), and the main component of the coating material discharged (or discharged) from the discharge port at the tip of the pressure feed path An additive material (the liquefied (fluidized) material (or liquid)) that constitutes the coating material is added (mixed) to a single substance (or mixture) of the material (main material) in the vicinity of the ejection port.

When the additive is liquid or liquid (emulsion, slurry, or other liquid), a liquid additive injection port (including a spray nozzle (tip)) is provided on the outer periphery (or/and inside) of the discharge port of the main material. The liquid additive injection port (ejection hole ) to merge (mix) the liquid additives discharged in the form of a mist. As a result, for example, the base surface is sprayed (see Patent Literatures 1 and 2).

Japanese Utility Model Laid-Open No. 56-110858 Japanese Utility Model Publication No. 02-031170

A mixing ratio of the main material and the secondary material (liquid additive) constituting the coating material is usually determined. For example, the ratio of cement, rock wool, and water is specified for sprayed rock wool, which is a fireproof coating material (approved by the Minister of Land, Infrastructure, Transport and Tourism). If it deviates from the ratio approved by the Minister of Land, Infrastructure, Transport and Tourism, it will not be a fireproof coating material approved by the Minister of Land, Infrastructure, Transport and Tourism.

If the amount of coating material to be applied in one day changes, the spray amount per unit time may have to be changed. As a result, the spray amount of the liquid additive per unit time also naturally changes. When the amount of the liquid additive sprayed per unit time is reduced, the pressure at the liquid additive spray nozzle tip becomes too small, and the particles of the liquid additive sprayed (sprayed) become large, which may not be atomized. In such a case, the mixing characteristics of the main material and the liquid additive deteriorate. Conversely, when the amount of liquid additive sprayed per unit time increases, the pressure in the liquid additive pressure-feeding tube connected to the liquid additive spray nozzle tip becomes too high, causing the liquid additive pressure-feeding tube to become too large. There is a risk that it will come off the spray nozzle tip or that the liquid additive pumping tube will rupture.

The present invention is to solve the above problems. For example, it is to provide a technique that facilitates changing the amount of the liquid additive. For example, even if the amount of coating material sprayed per unit time is different, the liquid additive pumping tube (hose) does not easily come off from the liquid additive spray nozzle tip. Another object of the present invention is to provide a technique that facilitates keeping the amount of the liquid additive to be constant. Alternatively, even if the addition of the liquid additive is stopped during construction, the liquid pressure in the pumping path of the liquid additive does not easily damage the members in the path, the connection part of the path is difficult to come off, and the liquid additive does not leak. It is to provide technology that is unlikely to occur.

The present invention
n ( _n is an integer of 2 or more) liquid material spray nozzle tips A ₁ , . connecting _tubes B ₁ , .
One end of the connection tube B _k (k is 1 to m) is connected to the liquid material spray nozzle tip A _k (k is 1 to n), and the other end is connected to the connection tube,
Any one of the connection tubes B _k (k is 1 to m) ( _j is any one of 1 to m; one or more, or all of them) may Detachable from the liquid material spray nozzle tip and/or the connecting pipe,
The connection pipe and the liquid material opening/closing valve are detachably connected,
The liquid material opening/closing valve is connected to a liquid material pressure-feeding hose,
A device is proposed in which the _n liquid material spray nozzle chips A ₁ , .

The present invention
It comprises a liquid material spray nozzle tip arranged near the discharge port in the pumping path of the main material, a connecting tube, a connecting tube, and a liquid material on-off valve,
There are a plurality of said liquid material spray nozzle tips and said connection tubes,
The connection tube has one end connected to one end of the connection tube, the other end connected to the liquid material spray nozzle tip, and the at least one connection is a detachable connection.

The present invention is the above apparatus, wherein the at least one liquid material spray nozzle tip can be divided into a plurality of pieces, and the split pieces of the liquid material spray nozzle tip are connected facing each other from both sides of the mounting portion of the liquid material spray nozzle tip. A device is proposed in which a liquid material spray nozzle tip is constructed by:

The present invention proposes the above apparatus, wherein the connection mechanism between the connection pipe and the opening/closing valve for the liquid additive is a one-touch joint, and the connection pipe is detachably connected.

The present invention proposes a device as described above, wherein a connection mechanism between the connection tube and the connection tube and/or the liquid material spray nozzle tip is a one-touch joint, and the connection tube is detachably connected. .

The present invention
A method is proposed in which the liquid material is pumped through the path of the device and sprayed from the liquid material spray nozzle tip, and the sprayed material joins the main material discharged from the discharge port at the tip of the pressure-fed path.

According to the present invention, it is easy to reduce or increase the number of liquid material spray nozzle tips. Therefore, for example, even if three liquid material spray nozzle tips are provided, it is appropriate to use two liquid material spray nozzle tips for spraying the liquid material. The liquid pressure of the liquid material is too low when the total area of the ejection holes provided in the spray nozzle tip is 3 x S (mm ² ), and the total area of the ejection holes provided in the liquid material spray nozzle tip is 2 x S (mm 2 ). Such measures can be taken easily when the hydraulic pressure of the liquid material in ² ) is appropriate. Conversely, for example, when two liquid material spray nozzle tips are not appropriate, and three are appropriate, that is, two liquid material spray nozzle tips are provided in the liquid material spray nozzle tip. The liquid pressure of the liquid material is too high when the total area of the ejection holes is 2×S (mm ² ), and the liquid pressure of the liquid material is too high when the total area of the ejection holes provided in the liquid material spray nozzle tip is 3×S (mm ² ). Such a response can be easily taken when appropriate. In addition, it can be easily dealt with by changing to a liquid material spray nozzle tip having a jet hole having a different area from S (mm ² ).

Since the liquid pressure of the liquid material can be easily kept within an appropriate range, the liquid additive pumping tube may come off from the liquid additive spray nozzle tip or the liquid additive pumping tube may burst during operation. Accidents are unlikely.

Since the liquid pressure of the liquid material can be easily kept within an appropriate range, the liquid material can be easily atomized, and since the atomized liquid material can be added to the main material, the main material and the liquid material can be mixed. It is easy to make a homogeneous mixture of the main material and the liquid material.

Even if a part of the liquid material spraying nozzle tip fails, it is easy to replace only the liquid material spraying nozzle tip in which the problem has occurred, resulting in good work efficiency.

Schematic diagram of the device of the invention

A first invention is an apparatus. This device is used for merging multiple materials. A plurality of materials are, for example, a main material and a secondary material. The main material can be appropriately selected depending on the purpose. The secondary material can be appropriately selected depending on the purpose. The apparatus is, for example, an apparatus applied (employed) to a coating apparatus. For example, a liquid material (liquid additive material ) is the supply (spray) device.

The device comprises a plurality of liquid material spray nozzle tips, a plurality of connecting tubes, a connecting tube, and a liquid material on-off valve. For example, n (n is an integer equal to or greater than 2) liquid material spray nozzle tips A ₁ , . . . , A _n are provided. For example, m (m is an integer equal to or greater than 2. m and n may be the same or different.) connection tubes B ₁ , . . . , B _m are provided. Said n and said m are generally the same number. However, it is not easy to add an unpredictable number of liquid material spray nozzle tips. In contrast, the connecting tube can be easily stored on hand. In other words, the number of connection tubes pre-assembled in the device may be less than the number of liquid material spray nozzle tips, since there is no big problem in keeping the connection tubes at hand. One end of the connection tube is connected to one end of the connection tube, and the other end is connected to the liquid material spray nozzle tip. The at least one connection is a removable (eg, detachable) connection. For example, one end of the connection tube B _k (k is 1 to m) is connected to the liquid material spray nozzle tip A _k (k is 1 to n), and the other end is connected to the connection tube. Any one of the connection tubes B _k (k is 1 to m) ( _j is any one of 1 to m; one or more, or all of them) may It is detachable (for example, detachable) from the liquid material spray nozzle tip and/or the connecting pipe. For example, the connecting pipe and the liquid material opening/closing valve are detachably (for example, detachably) connected. The liquid material opening/closing valve is connected to, for example, a liquid material pressure-feeding hose. The liquid material opening/closing valve is detachably (for example, detachably) connected to, for example, a liquid material pressure-feeding hose. The liquid material spray nozzle tip is arranged, for example, in the vicinity (for example, the outer periphery) of the discharge port in the pressure-feeding path of the main material. Here, the vicinity of the ejection port means a distance within 20 cm from the ejection port.

The at least one liquid material spray nozzle tip can be divided into a plurality of pieces. A liquid material spray nozzle tip is constructed by connecting liquid material spray nozzle tip segment pieces facing each other from both sides of the mounting portion of the liquid material spray nozzle tip. All liquid material spray nozzle tips may be configured to be split into a plurality of pieces. However, it is unlikely that all liquid material spray nozzle tips will be removed. In this sense, one liquid material spray nozzle tip need not be replaceable (detachable), but it is preferable that all the liquid material spray nozzle tips are replaceable (detachable). If a predetermined number of liquid material spray nozzle chips are sufficiently installed (arranged), it is less likely that additional liquid material spray nozzle chips will be added later. If you do not want to use all the liquid material spray nozzle tips, connect tubes other than the desired number (the number that matches the number of liquid material spray nozzle tips you want to use) It can be removed from the tube, and the connection tube removed from the attachment portion or the connection tube of the connection tube can be closed with a plug. Therefore, the number of liquid material spray nozzle tips may be a preset number. Of course, it is preferable to be able to add more liquid material spray nozzle tips when necessary. From this point of view, it is preferable that the mounting portion (for example, the mounting ring) of the liquid material spray nozzle tip is provided in advance in a large amount. It is preferable that the liquid material spray nozzle tip is constructed by inserting the liquid material spray nozzle tip part (half) and the remaining part (half) oppositely from the front and rear of the mounting ring and integrating them. For example.

A connection mechanism between the connection pipe and the liquid additive opening/closing valve is preferably a one-touch joint. A detachable connection form is preferred.

A connection mechanism between the connection tube and the connection tube and/or the liquid material spray nozzle tip is preferably a one-touch joint. A form in which the connection tube is detachably connected is preferable.

The connecting pipe is, for example, a branch pipe.

A second invention is a method. The method includes spraying liquid material from a liquid material spray nozzle tip as it is pumped through a path of the apparatus. The method includes the step of joining the main material discharged from the discharge port at the tip of the pumping path through which the sprayed material was pumped.

A mixture of multiple materials (for example, a covering material) is composed of a main material and a secondary material. The covering material is formed by merging and mixing the main material and the secondary material. It is sufficient that what the main material and the secondary material are understood in the art. The secondary material is generally a liquid material. The liquid material includes not only liquid but also liquid material. For example, slurry-like ones are also included. Materials known in the art as so-called liquid additives may be mentioned. Combinations of the main material and the secondary material are exemplified below. The main material is mortar or concrete, and the secondary material is a liquid admixture (for example, liquid quick-setting agent, slurry-like quick-setting agent, resin emulsion, etc.). The main material is premixed mortar, and the secondary material is water, an aqueous solution, an emulsion, a mixed material made of slurry using water as a dispersion medium, or a mixture thereof. The main material is dry concrete, and the secondary material is water, an aqueous solution, an emulsion, an admixture made of slurry using water as a dispersion medium, or a mixture thereof. The main material is rock wool (including slag wool), glass wool, cellulose fiber, synthetic resin fiber, etc., and the secondary material is cement slurry. The main material is a fiber such as rock wool (including slag wool), and the secondary material is a resin emulsion or liquid polymer. The main material is a dry mixture of fibers such as rock wool (including slag wool) and a powdery binder such as cement, and the secondary material is water, an aqueous solution, an emulsion, or an admixture consisting of a slurry using water as a dispersion medium, or a mixture of these mixtures and the like.

The liquid material (for example, liquid additive) spray nozzle tip includes a spray nozzle tip main body having a liquid material flow path, an ejection hole, and a connection tube connecting portion. Any type may be used as long as it has a structure capable of atomizing the liquid material from the ejection holes. Materials include, for example, metals (such as stainless steel and brass), ceramics (such as alumina and silicon carbide), resins (such as synthetic rubbers such as nitrile rubber and ethylene propylene rubber, synthetic resins such as polypropylene and polyamide). etc.) can be anything. A composite material of the above materials may also be used. However, it is preferable that the material is not a liquid material (liquid additive material) that deteriorates immediately. If the ejection hole has an area smaller than the cross-sectional area of the liquid material flow path, that is, if it is an orifice, the liquid material can be easily atomized. Therefore, it is preferable to have the configuration as described above. The shape of the ejection hole is not particularly limited. Preferred examples include circular, elliptical, rectangular, square, rhombic, hexagonal, and slit-like shapes. The structure and material of the connection tube connection portion are not limited as long as the connection tube can be connected so as to communicate with the liquid material flow path in the chip. When the connection tube connecting portion is a one-touch joint, it is easy to attach and detach from the connection tube. Therefore, the above configuration is preferred.

Examples of the one-touch joint include "Micro coupler", "Small coupler", and "Cube coupler" (all trade names) manufactured by Nitto Kohki Co., Ltd., and "NS-AS type coupling" and "NC type coupling" manufactured by Nasco Fitting Co., Ltd. Couplings such as "Eggplant Cup Mini", "NCRS type Eggplant Cup S" (all trade names), "Light Coupling" (trade name) manufactured by Nihon Pisco Co., Ltd., and "Couple.A" (trade name) manufactured by Aoi Co., Ltd. (coupler, coupler), or "Touch Connector Five" (trade name) manufactured by Chiyoda Engineering Co., Ltd., "Z-JOINT" (trade name) manufactured by Aoi Corporation, "Tube Fitting", "Tube Fitting" manufactured by Pisco Japan. Fitting Mini" (both product names), SMC's one-touch fitting "KQ2" series, etc., which includes a one-touch fitting. Attach the plug (male) or socket (female) of the above to the spray nozzle tip body as a connection tube connection part directly or via other joints, etc., and attach a detachable socket or plug to the plug or socket of the coupling to the connection tube. Install.

The liquid material spray nozzle tip may be assembled from a plurality of members. The number of nozzle tips for spraying the liquid material is determined comprehensively based on factors such as the spray amount of the liquid material per unit time, the liquid pressure, the ease with which the main material and the liquid material mix, and the weight and bulk of the apparatus. and decide. A case of one is also conceivable, but preferably a plurality of them.

The liquid material spray nozzle tip is a liquid material sprayed from the liquid material spray nozzle tip into the flow of the main coating material discharged from the discharge port on the outer periphery of the discharge port in the pressure feeding path of the main material of the coating material. is preferably arranged toward the center side of the flow of the main material so that the flows of the main material merge. The liquid material spray nozzle tip may be arranged directly on the outer circumference of the outlet of the main material of the coating material, or may be arranged at a position separated from the outer circumference of the outlet by within 20 cm.

The shape and material of the liquid material opening/closing valve are not particularly limited as long as they can open and close the flow path of the liquid material. Preferred examples include butterfly valves, gate valves, globe valves, needle valves, ball valves, and the like. Ball valves are more preferred because they are readily available, relatively inexpensive, and easy to handle.

The connection pipe is a pipe that connects the connection tube and the liquid material opening/closing valve. Its material and shape are not particularly limited. However, if the portion to which the connection tube is connected is a one-touch joint, it is easy to attach and detach the connection tube. Therefore, the above configuration is preferable.

The connecting pipe is preferably a branch pipe. In the case of such a configuration, it is possible to easily cope with the case where the number of liquid material spray nozzle tips is plural. If the number of liquid material spray nozzle tips is smaller than the number of branches of the connection pipe (branch pipe), the surplus joint portions may be plugged. For example, if the connecting pipe is a branch pipe with one pump-side port (inlet) and four liquid material spray nozzle tip-side ports (outlets), and the number of liquid material spray nozzle tips If there are 3 outlets, plug one of the 4 outlets. Also, the surplus connection tube may be closed with a plug.

The material, cross-sectional shape, and size of the connecting tube are not particularly limited. Materials include, for example, metals (such as stainless steel and brass), ceramics (such as alumina and silicon carbide), resins (such as synthetic rubbers such as nitrile rubber and ethylene propylene rubber, synthetic resins such as polypropylene and polyamide). etc.) can be anything. A composite material of the above materials may also be used. However, it is preferable that the material is not a liquid material (liquid additive material) that deteriorates immediately. Also, flexible materials are preferred. For example, rubber and resin are preferred. When rubber or resin is used as the connecting tube, insert a metal tube having an inner diameter of about 1 to 5 cm into the connecting tube near the connecting tube connecting part of the connecting tube and the liquid material spray nozzle tip. , the connection tube is easy to attach and detach. Therefore, the embodiment as described above is preferred. The cross-sectional shape of the connecting tube is preferably circular because it has excellent pressure resistance.

Said device, for example a liquid material spraying device, can easily change the number of liquid material spraying nozzle tips and connecting tubes. Thereby, the pressure of the liquid material applied to the liquid material spraying device can be adjusted. Therefore, the liquid material pressure-feeding tube is less likely to come off from the liquid material spray nozzle tip. The liquid material pumping tube is less likely to burst. The sprayed liquid material is easily atomized. Atomized liquid material is easily added to the main material.

If the pressure of the liquid material applied to the liquid material spraying device is too small to atomize the liquid material, the number of liquid material spray nozzle tips and connecting tubes to be connected is reduced. That is, the liquid material spray nozzle tip is changed to one having a smaller ejection hole area. Alternatively, by replacing the connecting tube with one having a smaller cross-sectional area, the pressure of the liquid material that can atomize the liquid material is increased. When replacing the connecting tube with one having a smaller cross-sectional area, a joint for different diameters is connected to the connecting tube connecting portion of the connecting tube and the liquid material spray nozzle tip.

If the pressure of the liquid material applied to the liquid material spraying device is high and there is a risk that the liquid material pressure-feeding tube will come off from the liquid material spraying nozzle tip or the liquid material pressure-feeding tube will burst, the liquid material spraying nozzle tip and the connected connection Increase the number of tubes. Alternatively, the liquid material spray nozzle tip is changed to one having a larger ejection hole area. Alternatively, replace the connecting tube with one having a larger cross-sectional area. By doing so, the pressure of the liquid material can be lowered to the extent that there is no risk that the liquid material pressure-feeding tube will come off the liquid material spray nozzle tip or that the liquid material pressure-feeding tube will not rupture.

The method of forming a coating material layer using the technology of the present invention comprises pumping the main material of the coating material, discharging the main material from a discharge port at the tip of the pressure feeding path of the main material, and connecting the liquid material to the liquid material spraying device. The liquid material is pressure-fed to the material pressure-feeding hose, and the liquid material is atomized by spraying the liquid material from the liquid material spray nozzle tip of the liquid material spraying device. After adding, spray on the coating substrate.

The present invention will be specifically described below. The following examples are only examples of the invention. The present invention is not limited to the following examples. That is, the present invention includes modifications and application examples that do not significantly impair the features of the present invention.

FIG. 1 is a schematic diagram of an apparatus embodying the present invention.

In this example, three liquid material spray nozzle _{tips A 1} , . . . , An and connection tubes B ₁ , . Incidentally, it will be easily understood that the same applies when n and m are other integers.

In FIG. 1, A ₁ , A ₂ and A ₃ are liquid material spray nozzle tips. The chip consists of a half-to-half connection, as can be seen in FIG. The liquid material spray nozzle tips A ₁ , A ₂ , A ₃ are attached to rings C ₁ , C ₂ , C ₃ attached to the outer periphery of the tip of the cylindrical body 1 in the pumping path of the main material. Thread grooves are formed on the inner peripheral surfaces of the rings C ₁ , C ₂ and C ₃ . By screwing a thread groove formed on the outer peripheral surface of the tip half into this thread groove, the tip halves are connected and integrated. Liquid material spray nozzle tips A ₁ , A ₂ and A ₃ are thus configured. The ejection ports of the liquid material spray nozzle tips A ₁ , A ₂ , and A ₃ are fixed toward the central axis of the cylindrical body 1 .

B ₁ , B ₂ , B ₃ are connecting tubes. The connection tubes B ₁ , B ₂ , B ₃ are made of a flexible resin material (for example, polyurethane). By inserting the distal ends of the connection tubes _{B1 ,} B2, _B3 into the liquid material spray nozzle tips A1, _A2 , A3 _, the connection tubes _B1 , _{B2 , B3} and the liquid material spray nozzle tip A ₁ , A ₂ and A ₃ are connected. This connection is a one-touch joint mechanism. Therefore, connection/separation is easy. For example _, if the user does not want to use the liquid material spray nozzle tip A3 _, the connection tube _B3 can be pulled out from the liquid material spray nozzle tip A3. The inner diameters of the connection tubes B ₁ , B ₂ and B ₃ are, for example, 6 mm.

2 is a connecting pipe. The connecting pipe 2 is molded from hard resin. Branch pipe portions D ₁ , D ₂ , D ₃ and D ₄ are provided on the distal end side of the connection pipe 2 . This creates four channels. By inserting the rear end sides of the connection tubes _{B1 , B2} and _B3 into the branch pipe portions D1 _, D2 and _{D3 among} the branch pipe portions D1, D2 _{, D3} and _D4 , , the connecting tubes B ₁ , B ₂ , B ₃ and the connecting tube 2 are connected. This connection is a one-touch joint mechanism. Incidentally, this time, the branch pipe section _D4 is not used. Therefore, the branch pipe portion _D4 is closed with the plug 3. As shown in FIG. The rear end side of the connection pipe 2 forms one pipeline. A liquid material opening/closing valve 5 is connected to this one pipe line 4 . This connecting portion is also a one-touch joint mechanism.

The rear end side of the liquid material opening/closing valve 5 is connected to a pressure feed hose (not shown) for the liquid material via a coupling. That is, a coupling plug is connected to the rear end side of the liquid material opening/closing valve 5, and a coupling socket detachably attached to the plug is attached to the tip of the pressure-feeding hose for the liquid material. It is preferable that the rear end side of the liquid material opening/closing valve 5 and the pressure-feeding hose for the liquid material are detachably (for example, detachably) connected by a one-touch joint. One end side of the pressure-feeding hose is inserted (provided) in a storage container for the liquid material. A flow path (path) in the middle of the pressure-feeding hose is provided with a pressure-feeding pump for the liquid material, a leak device, and the like in order from the storage container side. The leak device has a leak discharge port, and when the pressure of the liquid material passing through the flow path (path) increases, the liquid material from the storage container flows into the storage container through the leak discharge port and the discharge hose. It is designed to flow back. The flow path (path) is provided with a pressure gauge or a flow meter, if necessary. Furthermore, a display section for displaying the flow rate of the flowmeter is provided.

One end of a main material pressure-feeding hose is connected to the cylindrical body ₁ to which the liquid material spray nozzle tips A1, _A2 , and A3 _are attached. The other end of the main material pressure-feeding hose is connected to a main material constant supply device. A blower is attached to the main material metering supply device.

In the apparatus configured as described above, the main material is jetted (discharged) from the tip opening (discharge port) of the cylindrical body 1 by the blower and the main material constant supply device. That is, the main material is supplied (spray: jet: discharge) from the discharge port at a rate of X ml/min via the main material constant supply device. On the other hand, the liquid material (for example, liquid additive) in the storage container is delivered at a rate of Y ml/min per liquid material spray nozzle tip by the operation of the liquid material pressure-feeding pump. In the above example, since there are three liquid material spray nozzle tips, the liquid material is supplied (spray: eject: discharge) at a rate of 3×Yml/min in total. As a result, the main material and the liquid material (liquid additive material) join together to form a mixture that forms a coating material, which is sprayed onto a predetermined location.

In the spraying operation, when the pressure of the liquid material (liquid additive) is too low to atomize, the connecting tubes B ₁ , B ₂ , B connected to the liquid material spray nozzle tips A ₁ , A ₂ , A ₃ Remove one of ₃ from the connecting pipe. Then plug the removed part. By doing so, the total area of the ejection holes provided in the liquid material spray nozzle tip with the same ejection amount becomes, for example, 2/3, so that the liquid material per one liquid material spray nozzle tip (liquid additive As the supply amount (spray amount: spray amount: discharge amount) of the liquid material (additive material) increases, the liquid pressure of the liquid material (liquid additive material) increases, and atomization becomes possible. By replacing the liquid material spray nozzle tip used to deliver the liquid material (liquid additive) to one with a smaller ejection hole area, the liquid pressure of the liquid material (liquid additive) is increased and the mist is generated. It may be possible to If the liquid pressure of the liquid material (liquid additive) is too high, the opposite is true, i.e., increase the number of liquid material spray nozzle tips used to deliver (spray: eject: discharge) the liquid material (liquid additive). Alternatively, the liquid material spray nozzle tip may be replaced with one having a larger ejection hole area.

Specific examples are further described below.

As the main material of the covering material, "Taiheiyo Spray Coat" (trade name) manufactured by Taiheiyo Materials Co., Ltd. ("Spraying Rock Wool" certified by the Minister of Land, Infrastructure, Transport and Tourism as a nonflammable product, symbol: RW) was used. Water (symbol: W) was used as a secondary material (liquid material: liquid additive). A spray test was then performed.

Table 1 shows the conditions of the spraying test, the pressure (water pressure) in the pumping path of the liquid material (liquid additive: water), the state of the water sprayed from the liquid material spray nozzle tip, and the stability of the device. .

The condition of the water sprayed from the liquid material spray nozzle tip and the evaluation of the stability of the device are as follows.
<Situation of injected water>
◯: The jetted water was sufficiently fine and atomized.
x: The sprayed water had large grains and was not atomized.
<Device stability>
○: Water pressure exceeding the pressure resistance (1 MPa) of the liquid material pumping hose, quick joint and connecting pipe (branch pipe) is not applied and is stable. The pumping hose, one-touch joint, connecting pipe (branch pipe) and branch pipe did not burst.
×: Water pressure exceeding the pressure resistance (1 MPa) of the liquid material pumping hose, one-touch joint, and connecting pipe (branch pipe) is applied, and the liquid material pumping hose comes off from the one-touch joint and branch pipe, or the liquid additive material pumping hose, one-touch joint. Also, there is a risk of an accident in which the branch pipe ruptures.

The following can be understood from Table-1.

No. In example 1 (three spray nozzle tips), the water pressure in the pumping path of the liquid material was low (0.05 MPa), and the sprayed water was not atomized and could not be added evenly to the main material. On the other hand, even with the same ejection amount, No. In example 2 (with one spray nozzle tip), the water pressure in the pumping path of the liquid material was high (0.4 MPa), and the sprayed water was atomized and evenly added to the main material. No. In example 3 (with two spray nozzle tips), the water pressure in the pumping path of the liquid material was high (0.2 MPa), and the sprayed water was atomized and evenly added to the main material.

No. 2, in which the ejection amounts of the main material and the liquid material (water) were increased, and the construction area per unit time (construction thickness: 30 mm) was 26.4 m ² /hour. In the example of 4 (one spray nozzle tip), the water pressure in the liquid material pumping path is high (1.8 MPa), exceeding the pressure resistance performance (1 MPa) of the liquid material pumping hose, quick joint and branch pipe, There is a risk that the liquid material pressure-feeding hose will come off from the one-touch joint and the branch pipe, or that the liquid additive material pressure-feeding hose, the one-touch joint and the branch pipe will burst. On the other hand, even with the same ejection amount, No. In example 5 (three spray nozzle tips), the water pressure in the liquid material pressure-feeding path is low (0.2 MPa), the liquid material pressure-feeding hose does not come off the one-touch joint and the branch pipe, and the liquid material pressure-feeding hose does not come off. , One-touch joints and branch pipes did not burst, and spraying was possible stably and safely.

That is, according to the present invention, the number of spray nozzle tips to be used can be adjusted to an appropriate number during work, and the work can be continued without any trouble.

A1, _{A2 ,} A3 Liquid material spray nozzle tip _B1 , B2, _B3 Connection tube C1, _{C2 ,} C3 Ring D1, _D2 , _{D3 , D4} Branch pipe part _{1 Cylindrical} body ₂ Connection pipe 3 Stopper 4 Pipe line 5 Liquid material opening/closing valve

Claims (5)

n (n is an integer of 2 or more) liquid material spray nozzle tips A ₁ , . comprising connecting tubes B ₁ , . . . , Bm, connecting tubes, and liquid material on-off valves,
One end of the connection tube Bk (k is 1 to m) is connected to the liquid material spray nozzle tip Ak (k is 1 to n), and the other end is connected to the connection tube,
Any one of the connection tubes Bk (k is from 1 to m) (j is any value from 1 to m; one or more, or all of them) may be the liquid material. It is detachable from the spray nozzle tip Aj (j is any of 1 to n) and / or the connection pipe,
The connection pipe and the liquid material opening/closing valve are detachably connected,
The liquid material opening/closing valve is connected to a liquid material pressure-feeding hose,
The n liquid material spray nozzle tips A ₁ , .
A connection mechanism between the detachably connected connection tube Bj (j is 1 to m) and the connection tube and/or the liquid material spray nozzle tip Aj (j is 1 to n) is a one-touch joint,
If you do not want to use any one of the liquid material spray nozzle tips A ₁ , . A device having a structure in which the liquid material spray nozzle tip is removed from the mounting portion and/or the connecting pipe, and the connecting tube removed from the mounting portion and/or the connecting tube of the connecting pipe is plugged with a plug. At least one of the liquid material spray nozzle tips A ₁ , . . . , An can be divided into a plurality of pieces,
2. The device according to claim 1, wherein said liquid material spray nozzle tip is constructed by connecting liquid material spray nozzle tip split pieces facing each other from both sides of said mounting portion of said splittable liquid material spray nozzle tip. A connection mechanism between the connecting pipe and the liquid additive opening/closing valve is a one-touch joint,
3. The device according to claim 1, wherein said connecting pipe is detachably connected to said liquid additive opening/closing valve. The apparatus according to any one of claims 1 to 3, wherein said connecting pipe is a branch pipe. The liquid material is sprayed from any one of the liquid material spray nozzle tips A ₁ , . A method for joining the main material discharged from the discharge port at the tip of the pressure-feeding route to which the material has been pressure-fed,
A method in which the number of liquid material spray nozzle tips used is controlled to provide an appropriate pressure in the liquid material pumping path.

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