Fiber spraying device and fiber spraying method

Abstract

To provide a technique by which in a fiber spraying device used for spraying method of fiber composition by dry construction method or semi-dry construction method, pulsation is less likely to occur in a fiber pumping path, and it is less likely to occur that even when stopping supply of fibers such as rock wools into the fiber pumping path, fine particles of the fibers staying in the fiber pumping path continue to eject from a fiber discharge port, and the fibers are clogged in the fiber pumping path.MEANS: A pressure in a fiber pumping path is measured by a pressure gauge fiber, pressure data Pm in the fiber pumping path at that time is transmitted to (K) calculator, and is compared to allowable pressure upper limit value data Pmax stored in a memory for an allowable pressure upper limit value and allowable pressure lower limit value data Pmin stored in a memory for an allowable pressure lower limit value. When the pressure data is out of an allowable pressure range, a transmission order is issued from a controller, and an overpressure transmission device or an underpressure transmission device, which has received the order, notifies circumferential people that the pressure data is out of the allowable pressure range.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fiber spraying device used for rock wool spraying work using the dry spraying method or semi-dry spraying method. [Background technology]

[0002] A fiber layer made of rock wool is widely used on the surface of a structure to provide fire resistance, fire prevention, sound absorption, and / or heat insulation. A spraying method using a coagulant whose main components are granular fiber (fiber masses with a diameter of several mm to several cm) and water is often used to form the fiber layer. Known methods for spraying rock wool include the wet method, the dry method, and the semi-dry method.

[0003] The wet method uses a coating material for spray application that is made by mixing the main material (granular rock wool fiber or cement) with secondary materials (surfactants and thickeners), adding water to it, and mixing the mixture in a mixer, which is then sprayed from a nozzle using compressed air.

[0004] In the dry method, a dry mixture (dry mixture, hereafter sometimes referred to as "rock wool-cement cotton blend" or "cotton blend") made by dry-mixing granular rock wool fibers with cement is fed into a deflocculating device called a rock wool sprayer (rock wool sprayer) or cotton deflocculating machine, where it is deflocculated by a built-in deflocculating section such as a rotating cutter or rotating rod, and then sent out in a fixed amount into a pressure-feeding path by a rotary feeder or the like built into the cotton deflocculating device. It is then pressurized through a hose by a blower and discharged from a spray nozzle. At the same time, pressurized water is sprayed from multiple water nozzles arranged around the periphery of the spray nozzle and / or from a single water nozzle arranged near the central axis of the spray nozzle, and the two are joined, mixed, and sprayed.

[0005] The semi-dry method is a method in which the rock wool granular fiber and cement are not mixed in advance. In the semi-dry method, the rock wool granular fiber is put into a cotton-opening device in the same manner as the mixed cotton in the dry method, and is finely granulated (finely granulated (fiber masses with a diameter of several mm to several cm)) by a built-in cotton-opening section such as a rotary cutter or a rotating rod, and is quantitatively sent into a pressure-feeding path by a rotary feeder or the like built into the cotton-opening device, and is pressure-fed through a hose by a blower (air blower) and supplied to a spray nozzle. The cement is mixed with water in a mixer to form a cement slurry, and then supplied to a liquid material (cement slurry) spray nozzle arranged on a granular fiber spray nozzle through a conveying pipe (cement slurry pressure-feeding hose) by a slurry pump. The cement slurry is sprayed from a liquid material (cement slurry) spray nozzle arranged on the periphery of the granular fiber spray nozzle, or from a liquid material (cement slurry) spray nozzle arranged near the central axis of the granular fiber spray nozzle, and merges and mixes with the rock wool to form a fiber layer made of rock wool and cement hydrate. The semi-dry method produces less suspended dust and can form a coating layer with a bulk density close to that of the dry method. For these reasons, the semi-dry method has become the mainstream of rock wool spraying methods (see, for example, Patent Document 1 (page 2, Figure 3), Patent Document 2 (Figure 4), and Non-Patent Document 1).

[0006] The dry and semi-dry construction methods can pump rock wool over longer distances than the wet construction method, so even on large construction sites or sites with multiple floors, there is no need to repeatedly move the equipment and materials used for mixing, such as mixers, to the area where the rock wool is sprayed, which saves time and effort. Also, the dry and semi-dry construction methods can reduce the bulk density of the coating layer (sprayed rock wool layer) formed by the rock wool spraying method compared to the wet construction method. For this reason, the dry and semi-dry construction methods are more commonly used than the wet construction method. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2002-348978 A [Patent Document 2] Japanese Patent Application Publication No. 07-166618 [Non-patent literature]

[0008] [Non-Patent Document 1] "Fireproofing coating work" [online], First Build Co., Ltd., [Retrieved March 5, 2021], Internet〈 URL: http: / / www.firstb.co.jp / fireproofing_01.html 〉 Summary of the Invention [Problem to be solved by the invention]

[0009] However, in the dry and semi-dry construction methods, depending on the construction conditions, pulsation may occur when the rock wool granular fibers or mixed cotton (hereinafter referred to as "rock wools" or "fibers" as appropriate) is pumped, and even if the supply of rock wool to the fiber pumping path is stopped, fine rock wool particles remaining in the fiber pumping path may continue to be sprayed out from the fiber discharge port, or the rock wool may become clogged in the fiber pumping path.

[0010] When pulsation occurs, the quality of the fiber composition formed becomes unstable. When fine particles of rock wool are discharged, dust flies around and the working environment deteriorates. If the fiber pumping path becomes clogged, construction will be immediately stopped. These occur unexpectedly, so the psychological burden on the construction worker during construction is great.

[0011] The present invention is intended to solve the above-mentioned problems, and aims to provide a technology in a fiber spraying device used in a dry or semi-dry method of spraying a fiber composition, which is less likely to cause pulsation in the fiber pumping path, is less likely to cause fine particles of fibers remaining in the fiber pumping path to continue to be sprayed out of the fiber discharge outlet even when the supply of fibers such as rock wool to the fiber pumping path is stopped, and is less likely to cause fibers to become clogged in the fiber pumping path.

[0012] The present invention is intended to solve the above-mentioned problems, and aims to provide a technology that can improve workability by suppressing pulsation in a fiber spraying device used in a dry or semi-dry method of spraying a fiber composition, suppressing the continued ejection of fine fibers remaining in the fiber pumping path from the fiber discharge outlet even when the supply of fibers such as rock wool to the fiber pumping path is stopped, and suppressing clogging of the fiber pumping path. [Means for solving the problem]

[0013] As a result of intensive research to solve the above problem, the present inventor measured the pressure in the fiber pumping path with a pressure gauge and obtained the pressure data P m to the arithmetic unit, and the allowable pressure upper limit data P stored in the allowable pressure upper limit memory is max and the allowable pressure lower limit data P stored in the allowable pressure lower limit memory min In comparison, we have found that the above problems can be solved by providing a transmission device that notifies people in the vicinity that the pressure is excessive or insufficient when the pressure is outside the allowable pressure range, and by controlling the supply of fibers from the fixed quantity supply device of the cotton-dissolving machine to the fiber pressure pipe by a suppression command or an increase command from the control device, and have completed the present invention. That is, the present invention is a fiber spraying device shown in (1) or (2) below, and a fiber spraying method shown in (4) and (5). (1) (A) a fiber spray nozzle having a fiber passage having a fiber nozzle at one end and a fiber pressure-feed hose connection port at the other end, one or more liquid additive nozzles, and one or more liquid additive hose connection ports; (B) a fiber pressure-feeding hose; (C) a fiber defatting machine having a fiber inlet, a fiber defatting device, a quantitative supply device, a motor, and a fiber pressure pipe; (D) a blower; (E) a liquid additive hose; (F) a liquid additive pump having an inlet and an outlet; The fiber pressure-feeding hose (B) is connected to the fiber pressure-feeding hose connection port of the fiber spray nozzle (A), and the liquid additive hose (E) is connected to the liquid additive hose connection port of the fiber spray nozzle (A), The fiber pressure-feeding hose (B) is connected to one end of a fiber pressure-feeding pipe of the fiber opener (C), and the blower (D) is connected to the other end of the fiber pressure-feeding pipe, forming a fiber pressure-feeding path from the fiber pressure-feeding pipe of the fiber opener (C) to a fiber injection port of the fiber spray nozzle (A); A fiber spraying device in which the liquid additive hose (E) is connected to the discharge port of the liquid additive pump (F), and a liquid additive supply source (G) is connected to the inlet of the liquid additive pump (F), Furthermore, (H) a pressure gauge capable of transmitting pressure data; (I) a memory for an allowable pressure upper limit value; (J) A memory for a lower limit value of the allowable pressure; (K) a computing device; (L) a control device; (M) an overpressure transmission device; (N) Pressure shortage transmission device Equipped with The pressure gauge (H) is disposed in the fiber pumping path, and pressure data P in the fiber pumping path measured by the pressure gauge (H) m to the arithmetic unit (K); The allowable pressure upper limit data P stored in the allowable pressure upper limit memory (I) max to the calculation device (K), and when the following formula (1) is satisfied, a transmission command is sent to the overpressure transmission device (M), and when the overpressure transmission device (M) receives the transmission command, it notifies surrounding people that the pressure is overpressure, The allowable pressure lower limit data P stored in the allowable pressure lower limit memory (J) min to the arithmetic unit (K), and when the following formula (2) is satisfied, a transmission command is sent to the pressure deficiency transmission unit (N), and when the pressure deficiency transmission unit (N) receives the transmission command, the pressure deficiency transmission unit (N) notifies surrounding people that the pressure is insufficient, The supply of fiber from the quantitative supply device of the fiber defibrator (C) to the fiber pressure pipe is increased by an increase command from the control device (L), A fiber spraying device characterized in that the supply of fibers from the constant-volume supply device of the fiber defibrator (C) to the fiber pressure pipe is restricted by a restriction command from the control device (L). P m >P max (1) P m <P min (2) (2) further comprising (O) a memory for a target pressure upper limit value and / or (P) a memory for a target pressure lower limit value; Furthermore, (Q) Equipped with a pressure normal transmission device, The target pressure upper limit data P stored in the target pressure upper limit memory (O) Tmax and the target pressure lower limit data P stored in the target pressure lower limit memory (P) Tmin When the following formula (3) is obtained after transmitting the above to the arithmetic unit (K), The fiber spraying device of (1) above, characterized in that a normal state transmission command from the control device (L) is sent to the normal pressure transmission device (Q), and the normal pressure transmission device (Q) which receives the normal state transmission command is provided with a mechanism for notifying people in the vicinity that the pressure in the fiber pressure path is within a target range. P Tmin ≦P m ≦P Tmax (3) (3) A fiber spraying method using the fiber spraying device of (1) or (2) above, in which fibers are fed into the fiber inlet of the fiber defiberizer (C) and sprayed from the fiber spray nozzle (A), and a liquid additive is supplied from the liquid additive supply source (G) and sprayed from the fiber spray nozzle (A) to spray a mixture of the fibers and the liquid additive onto an object to be coated, A person who knows that the pressure in the fiber pressure-feeding path exceeds the allowable pressure upper limit value through the pressure excess transmission device (M) causes the control device (L) to issue a suppression command, and the supply of fiber from the quantitative supply device of the cotton defibrator (C) to the fiber pressure-feeding pipe is suppressed by the suppression command. A fiber spraying method characterized in that a person who, upon learning through the pressure deficiency transmission device (N) that the pressure in the fiber pressure path has fallen below the allowable pressure lower limit and is therefore underpressure, issues an increase command from the control device (L), which in turn increases the supply of fiber from the quantitative supply device of the cotton defiberizer (C) to the fiber pressure pipe. (4) The fiber spraying device is equipped with a pressure normal transmission device, The fiber spraying method (3) above, characterized in that when a person learns through the normal pressure transmission device (Q) that the pressure in the fiber pressure path is within the target pressure range from the target pressure lower limit value to the target pressure upper limit value, he or she causes the control device (L) to issue a holding command, and the amount of fiber supplied per unit time from the constant-volume supply device of the cotton deflocculator (C) to the fiber pressure pipe (hereinafter simply referred to as the "supply amount") is maintained constant by said holding command. Effect of the Invention

[0014] The present invention solves the above-mentioned problems, and provides a fiber spraying device for use in a dry or semi-dry method of spraying a fiber composition, which is less likely to cause pulsation within the fiber pumping path, is less likely to cause fine particles of fibers remaining in the fiber pumping path to continue to be sprayed out of the fiber discharge outlet even when the supply of fibers such as rock wool to the fiber pumping path is stopped, and is less likely to cause fibers to become clogged in the fiber pumping path.

[0015] In addition, according to the present invention, in a fiber spraying device used in a fiber composition spraying method using a dry method or a semi-dry method, pulsation in the fiber pressure-feeding path is suppressed, fine particles of fibers remaining in the fiber pressure-feeding path are prevented from continuing to be sprayed from the fiber discharge port even when the supply of fibers such as rock wool to the fiber pressure-feeding path is stopped, and clogging of the fiber pressure-feeding path is suppressed, thereby improving workability. By suppressing pulsation, the mixing ratio of fibers and liquid additive is stabilized, and the quality of the formed fiber composition is stabilized. By suppressing the spraying of fine particles, dust generation is suppressed and the working environment is improved. By suppressing clogging in the fiber pressure-feeding path, construction can be completed without interruption. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic diagram of a fiber spraying apparatus of the present invention. [Diagram 2] FIG. 2 is a diagram showing the relationship between the amount of fiber supplied into the fiber pressure-feeding path for each hose length, and the hose pressure and conveying speed. [Diagram 3] FIG. 3 is an image diagram of the pressure inside the fiber pumping path. [Figure 4] FIG. 4 is an image diagram of the pressure inside the fiber pumping path. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The fiber spraying device of the present invention comprises: (A) a fiber spray nozzle having a fiber passage having a fiber nozzle at one end and a fiber pressure-feed hose connection port at the other end, one or more liquid additive nozzles, and one or more liquid additive hose connection ports; (B) a fiber pressure-feeding hose; (C) a fiber defatting machine having a fiber inlet, a fiber defatting device, a quantitative supply device, a motor, and a fiber pressure pipe; (D) a blower; (E) a liquid additive hose; (F) a liquid additive pump having an inlet and an outlet; The fiber pressure-feeding hose (B) is connected to the fiber pressure-feeding hose connection port of the fiber spray nozzle (A), and the liquid additive hose (E) is connected to the liquid additive hose connection port of the fiber spray nozzle (A), The fiber pressure-feeding hose (B) is connected to one end of a fiber pressure-feeding pipe of the defibrator (C), and the blower (D) is connected to the other end of the defibrator (C), forming a fiber pressure-feeding path from the fiber pressure-feeding pipe of the defibrator (C) to a fiber injection port of the fiber spray nozzle (A); A fiber spraying device in which the liquid additive hose (E) is connected to the discharge port of the liquid additive pump (F), and a liquid additive supply source (G) is connected to the inlet of the liquid additive pump (F), Furthermore, (H) a pressure gauge capable of transmitting pressure data; (I) a memory for an allowable pressure upper limit value; (J) A memory for a lower limit value of the allowable pressure; (K) a computing device; (L) a control device; (M) an overpressure transmission device; (N) Pressure shortage transmission device Equipped with The pressure gauge (H) is disposed in the fiber pumping path, and pressure data P in the fiber pumping path measured by the pressure gauge (H) m to the arithmetic unit (K); The allowable pressure upper limit data P stored in the allowable pressure upper limit memory (I) max to the calculation device (K), and when the following formula (1) is satisfied, a transmission command is sent to the overpressure transmission device (M), and when the overpressure transmission device (M) receives the transmission command, it notifies surrounding people that the pressure is overpressure, The allowable pressure lower limit data P stored in the allowable pressure lower limit memory (J) min to the arithmetic unit (K), and when the following formula (2) is satisfied, a transmission command is sent to the pressure deficiency transmission unit (N), and when the pressure deficiency transmission unit (N) receives the transmission command, the pressure deficiency transmission unit (N) notifies surrounding people that the pressure is insufficient, The supply of fiber from the quantitative supply device of the fiber defibrator (C) to the fiber pressure pipe is increased by an increase command from the control device (L), The supply of fiber from the quantitative supply device of the fiber defibrator (C) to the fiber pressure pipe is restricted by a restriction command from the control device (L). It is characterized by: P m >P max ...(1) P m <P min ...(2)

[0018] The fibers in the present invention refer to granular or short fibers, or granular or short fibers mixed with a binder such as cement and dry mixed (wherein the bulk of the fibers is greater than the bulk of the binder). Here, the bulk of the binder refers to the value obtained by dividing the mass of the binder contained by the bulk density of the binder, and the bulk of the fibers (granular or short fibers) refers to the value obtained by dividing the mass of the fibers (granular or short fibers) contained by the bulk density of the fibers. When short fibers are used as the fibers in the present invention, it is preferable to use fibers having a fiber length of 60 mm or less, and more preferably to use fibers having a fiber length of 30 mm or less. If the fiber length is long, the cross-sectional areas of the fiber pressure-feeding hose (B), the fiber passage of the fiber spray nozzle (A), and the fiber pressure-feeding pipe of the cotton-dissolving machine (C), that is, the cross-sectional area of ​​the fiber pressure-feeding path, are required to be large, and the fiber pressure-feeding hose (B) and the fiber spray nozzle (A) become large and heavy, making it difficult to perform the spraying operation. The granular fibers are fiber agglomerates having a diameter of several mm to several cm, preferably a fiber agglomerate having a diameter of 5 mm to 5 cm. In the case of mineral fibers such as rock wool, the granular cotton is obtained by subjecting raw cotton, which is merely a collection of fiberized mineral fibers, to one or a combination of two or more processes such as crushing, deflocculation, cutting, classification (e.g., sieving), and granulation. The granular cotton of rock wool includes fine and fine granular cotton of rock wool, and commercially available granular cotton, fine and fine granular cotton of rock wool such as "S-Fiber Granular Cotton" (product name) manufactured by Japan Rock Wool Co., Ltd., "Lokceram Granular Cotton" (product name) manufactured by JFE Rock Fiber Co., Ltd., and "Pacific Mineral Fiber Granular Cotton" (product name) manufactured by Pacific Materials Co., Ltd. can be suitably used. When such granular rock wool is used, heat is not easily transmitted to the substrate covering the rock wool, and heat insulation, fire resistance or non-combustibility are obtained, and sound absorption is also obtained.

[0019] The fiber material in the present invention includes inorganic fibers, organic fibers, and mixtures of inorganic and organic fibers. Examples of inorganic fibers include metal fibers, carbon fibers, rock wool, glass wool, ceramic wool, etc., and examples of organic fibers include vegetable fibers such as cellulose fibers and jute fibers, animal fibers such as wool and feathers, and synthetic fibers such as polypropylene fibers and polyvinyl alcohol fibers. For example, cotton-like inorganic fibers selected from rock wool, glass wool, ceramic wool, etc. are preferred in terms of durability, sound absorption, or heat insulation, and are more preferred because rock wool or ceramic wool can maintain its shape without melting even when exposed to 800°C or higher and is excellent in terms of heat resistance or fire resistance. Here, rock wool is a material (mineral fiber) that is made by quenching a material mainly composed of rocks or blast furnace slag melted in a melting furnace and fiberizing it. For example, slag wool produced from a material mainly composed of blast furnace slag is also included.

[0020] Examples of the liquid additive in the present invention include water, an aqueous solution, an inorganic slurry, a resin emulsion, an inorganic-containing resin emulsion (a resin-containing inorganic slurry), and a mixture of two or more of these. More preferred examples include water, an aqueous solution, a hydraulic inorganic powder slurry such as cement or blast furnace slag powder, a slurry containing an inorganic powder such as cement or blast furnace slag powder containing Al2O3, CaO, and / or SiO2 in its composition, an alkali silicate, and water, a synthetic resin emulsion (polymer), and a cement-containing resin emulsion (a resin-containing cement slurry). Examples of the resin emulsion used in the liquid additive include emulsions of synthetic rubber (e.g., styrene-butadiene copolymer, chloroprene rubber, acrylonitrile-butadiene copolymer, methyl methacrylate-butadiene copolymer, etc.), emulsions of natural rubber, emulsions of synthetic resins (e.g., polyolefins (e.g., polyethylene and polypropylene), polychloroprene, polyacrylic esters, styrene-acrylic copolymers, all-acrylic copolymers, vinyl acetate resins (e.g., polyvinyl acetate, vinyl acetate-acrylic copolymers, vinyl acetate-acrylic ester copolymers, modified vinyl acetate, ethylene-vinyl acetate copolymers, ethylene-vinyl acetate-vinyl chloride copolymers, vinyl acetate-vinyl versatate copolymers, acrylic-vinyl acetate-Veova (t-vinyl decanoate) copolymers, etc.), unsaturated polyester resins, polyurethane resins, alkyd resins, epoxy resins, etc.), and emulsions of bituminous materials (e.g., asphalt, rubber asphalt, etc.). The liquid additive is expected to act as a flocculant that aggregates fibers together due to the viscosity of the liquid additive itself. Therefore, hydraulic inorganic powder slurries such as cement slurries, slurries containing inorganic powders such as cement or blast furnace slag powder that contain Al2O3, CaO, and / or SiO2 in their composition, alkali silicate, and water, synthetic resin emulsions (polymers), and cement-containing resin emulsions (resin-containing cement slurries) are particularly preferred because they bond fibers together more firmly by hardening and / or evaporation of the dispersion medium.

[0021] The fiber spray nozzle (A) in the present invention comprises a fiber passage having a fiber nozzle at one end and a fiber pressure-feed hose connection port at the other end, one or more liquid additive nozzles, and one or more liquid additive hose connection ports. The fiber passage in the fiber spray nozzle is preferably formed by a fiber conduit, the internal cavity of the fiber conduit being the fiber passage, one end of the opening of the fiber conduit being the fiber nozzle, and the other end of the opening being the fiber pressure-feed hose connection port. The material of the fiber conduit is not particularly limited, and examples of preferred materials include one or a combination of two or more selected from metals, resins such as rubber, ceramics, glass, stone, wood, and bamboo, but from the viewpoint of ease of molding and strength, one or a combination of two or more selected from metals, resins such as rubber, and ceramics is more preferred.

[0022] The fiber spray nozzle (A) used in the present invention is preferably provided with one or more liquid additive nozzles arranged on the wall forming the fiber passage, inside the fiber passage, and / or on the outer periphery of the fiber nozzle. When one liquid additive nozzle is arranged inside the fiber passage, it is preferable to arrange the aggregate nozzle on the central axis of the fiber passage, and when a liquid additive nozzle is arranged on the wall forming the fiber passage or on the outer periphery of the fiber nozzle, it is preferable to arrange the liquid additive nozzle so that the central axis of the fiber flow in the fiber passage or the fiber flow sprayed from the fiber nozzle intersects with the central axis of the liquid additive flow sprayed from the liquid additive nozzle.

[0023] The materials of the fiber pressure-feeding hose (B) and the liquid additive hose (E) used in the present invention are not particularly limited, and preferred examples include one or a combination of two or more selected from metals and resins such as rubber. From the viewpoint of ease of handling, resin hoses are more preferred, and since both hoses are subjected to internal pressure, it is preferred that they are pressure-resistant hoses made of resin.

[0024] The deflocculating machine (C) in the present invention is equipped with a fiber inlet, a deflocculating device, a constant-volume feeder, a motor, and a fiber pressure-feeding pipe. Two or more fiber inlets, deflocculating devices, constant-volume feeders, motors, and fiber pressure-feeding pipes may be provided. Fibers fed into the fiber inlet are deflocculated by the deflocculating device and then sent to the constant-volume feeder, and a fixed amount of fibers per unit time is supplied to the fiber pressure-feeding pipe. The deflocculating device has one or more protrusions (e.g., I-shaped, L-shaped, plate-shaped, needle-shaped, etc. protrusions), vanes, blades, or chains attached to or formed on a rotating shaft, and the rotating shaft is rotated by the drive of a motor provided in the deflocculating machine (C).

[0025] The fiber inlet of the cotton-loafing machine (C) in the present invention is not limited in shape or material as long as it has a structure that allows the fibers to be fed into the cotton-loafing machine (C), but a hopper-shaped or slope-shaped inlet is preferable because it allows the fibers to be fed continuously into the cotton-loafing machine (C).

[0026] The quantitative supply device of the cotton opener (C) in the present invention may be any device capable of supplying a quantitative amount of fiber, and a screw feeder, a belt feeder, and a rotary feeder are preferred as examples, but a rotary feeder is preferred for supplying a quantitative amount of fiber to the fiber pressure feed pipe of the cotton opener (C) because it is easy to supply the fiber to the fiber pressure feed pipe in a sealed state. The quantitative supply device of the cotton opener (C) has a structure in which screws, rollers, rotors, etc. are rotated by the drive of a motor provided in the cotton opener (C), and the rotation speed per unit time of the screws, rollers, rotors, etc. varies depending on the rotation speed per unit time of the motor.

[0027] The blower in the present invention is not particularly limited as long as it can apply pressure to the fiber pressure-feeding path to supply air, but a ring blower and / or a roots blower are preferred. The blower is connected to the fiber pressure-feeding pipe of the cotton opener (C). Note that the connection referred to in the present invention includes not only direct connection, but also indirect connection, except when the same effect as that of direct connection cannot be obtained. The blower in the present invention may be a part of the cotton opener (C).

[0028] The liquid additive pump (F) used in the present invention has an inlet and an outlet. The inlet of the liquid additive pump (F) is connected to the liquid additive supply source (G), and the outlet of the liquid additive pump (F) is connected to the liquid additive hose (E). The liquid additive pump (F) used in the present invention may be any pump that can pump the liquid additive. For example, a reciprocating pump (e.g., a diaphragm pump, a piston pump, a plunger pump, etc.), a rotary pump (e.g., a screw pump, a gear pump, etc.), a centrifugal pump (e.g., a turbine pump, a volute pump, etc.), a squeeze pump, etc. are included. As the liquid additive pump (F) used in the present invention, a reciprocating pump, a rotary pump, and a squeeze pump are preferred examples because they are easy to pump a fixed amount of liquid additive.

[0029] The liquid additive supply source (G) in the present invention is preferably exemplified by a liquid additive storage tank in which the liquid additive is stored and a liquid additive supply faucet. When the liquid additive is water, the liquid additive supply faucet is, for example, a water faucet. The inlet of the liquid additive pump (F) and the liquid additive supply source (G) are often connected via a hose (pipe).

[0030] The pressure meter (H) in the present invention measures the pressure data P m The pressure gauge is not particularly limited as long as it can transmit and transfer the pressure to the calculation device (K). The pressure gauge is disposed in the fiber pressure path, but it is preferable to dispose it in the fiber pressure pipe of the cotton opener (C) or in the fiber pressure path within 10 m of the fiber pressure pipe, since the effect of pressure loss can be almost ignored and the effect of a malfunction in the fiber pressure path is easily expressed as pressure fluctuation. The pressure gauge (H) may be disposed directly in the fiber pressure pipe of the cotton opener (C) or the fiber pressure hose (B), or may be disposed in a metal pipe such as a steel pipe and then connected to the fiber pressure pipe of the cotton opener (C) and the fiber pressure hose (B), or to two fiber pressure hoses (B) so as to sandwich the pressure gauge, thereby disposing it in the fiber pressure path.

[0031] The control device (L) in the present invention may be of any mechanism as long as it can control the supply of fibers from the quantitative supply device of the cotton opener (C) to the fiber pressure transport pipe. For example, preferred examples include a system that controls the voltage or frequency of the motor driving the quantitative supply device of the cotton opener (C), and a system that adjusts the gear ratio of a gear device (gear box) when the quantitative supply device of the cotton opener (C) is driven via the gear device.

[0032] In the present invention, the allowable pressure upper limit memory (I) stores the allowable pressure upper limit data P max The allowable pressure lower limit data P min The allowable pressure upper limit data P max and allowable pressure lower limit data P min may be determined from the construction conditions such as the hose length and handling conditions (layout conditions) of the fiber pressure-feeding hose (B), the wind speed of the blower when fiber is not supplied to the fiber pressure-feeding pipe, and the target fiber discharge amount per unit time (amount of fiber supplied to the fiber pressure-feeding pipe), or may be determined by testing the fiber before the actual construction by supplying fiber to the fiber pressure-feeding pipe and injecting (discharging) it from the fiber injection port of the fiber spray nozzle (A) to confirm that no pulsation or clogging occurs in the fiber pressure-feeding path and that no large fluctuations in the pressure occur in the fiber pressure-feeding path, and the pressure data P in the fiber pressure-feeding path measured by the pressure gauge (H) at that time. m Also, before the actual construction, the amount of fiber supplied to the fiber pumping pipe per unit time is changed, and the fiber is experimentally supplied to the fiber pumping pipe and sprayed (discharged) from the fiber spray nozzle (A) to confirm that no pulsation or clogging occurs in the fiber pumping path and that no large fluctuations in the pressure in the fiber pumping path occur, and the pressure data P in the fiber pumping path measured by the pressure gauge (H) at that time is m The maximum value of the allowable pressure upper limit data P max , pressure data in the fiber pumping path P m The minimum value of the allowable pressure lower limit data P min It is also possible to use the following.

[0033] In the present invention, the pressure data P in the fiber pumping path measured by the pressure gauge (H) m to the calculation device (K), and the allowable pressure upper limit data P stored in the allowable pressure upper limit memory (I) is max When the above formula (1) is satisfied after transmitting the above to the calculation device (K), a transmission command is sent to the overpressure transmission device (M), and when the transmission command is received, the overpressure transmission device (M) is provided with a mechanism for notifying people in the vicinity that the pressure is exceeded. P m >P max ...(1) The mechanism for notifying surrounding people of the overpressure that the overpressure transmission device (M) is provided with is a mechanism for notifying surrounding people visually, a mechanism for notifying surrounding people audibly, and / or a mechanism for notifying surrounding people tactilely. Preferred examples of the mechanism for notifying surrounding people visually include a display device such as a liquid crystal display, a rotating light such as a red light, and an indicator lamp. Preferred examples of the mechanism for notifying surrounding people audibly include an alarm device such as a buzzer or whistle, a bone conduction device such as a bone conduction earphone, a device that plays music or sound, and the like. Preferred examples of the mechanism for notifying surrounding people tactilely include a vibrator.

[0034] In the present invention, the pressure data P in the fiber pumping path measured by the pressure gauge (H) m is transmitted to the calculation device (K), and the allowable pressure lower limit data P stored in the allowable pressure lower limit memory (J) is min to the calculation device (K), and when the following formula (2) is satisfied, a transmission command is sent to the underpressure transmission device (N), and when the underpressure transmission device (N) receives the transmission command, it has a mechanism for notifying people nearby that there is an underpressure. The underpressure transmission device (N) is a device equipped with a transmission mechanism similar to that of the excess pressure transmission device (M), and the excess pressure transmission device (M) may also function as the underpressure transmission device (N). P m <P min ...(2)

[0035] The present invention further comprises a (O) target pressure upper limit memory and / or a (P) target pressure lower limit memory, and the target pressure upper limit data P stored in the (O) target pressure upper limit memory is Tmax and (P) target pressure lower limit data P stored in the memory for the target pressure lower limit Tmin It is preferable that when the following formula (3) is satisfied after transmitting the above to the (K) calculation device, a normal state transmission command from the control device (L) is sent to the normal pressure transmission device (Q), and the normal pressure transmission device (Q) that receives the normal state transmission command is provided with a mechanism for notifying people nearby that the pressure in the fiber pumping path is within a target range. The normal pressure transmission device (Q) is a device equipped with a transmission mechanism similar to the excess pressure transmission device (M) and the underpressure transmission device (N), and may also function as the excess pressure transmission device (M) and / or the underpressure transmission device (N). P Tmin ≦P m ≦P Tmax (3)

[0036] In the present invention, the target pressure upper limit memory (O) stores target pressure upper limit data P Tmax The target pressure lower limit data P Tmin The target pressure upper limit data P Tmax and target pressure lower limit data P Tmin is the allowable pressure upper limit data P max and allowable pressure lower limit data P min Similarly, the pressure may be calculated from the construction conditions such as the hose length and handling conditions (layout conditions) of the fiber pressure-feeding hose (B), the wind speed of the blower when the fiber is not supplied to the fiber pressure-feeding pipe, and the target fiber discharge amount per unit time (amount of fiber supplied to the fiber pressure-feeding pipe), or it may be calculated by supplying the fiber to the fiber pressure-feeding pipe as a test before the actual construction and spraying (discharging) it from the fiber spray nozzle (A) to confirm that no pulsation or clogging occurs in the fiber pressure-feeding path and that no large fluctuations in the pressure occur in the fiber pressure-feeding path, and the pressure data P in the fiber pressure-feeding path measured by the pressure gauge (H) at that time. mAlso, before the actual construction, the amount of fiber supplied to the fiber pumping pipe per unit time is changed, and the fiber is experimentally supplied to the fiber pumping pipe and sprayed (discharged) from the fiber spray nozzle (A) to confirm that no pulsation or clogging occurs in the fiber pumping path and that no large fluctuations in the pressure in the fiber pumping path occur, and the pressure data P in the fiber pumping path measured by the pressure gauge (H) at that time is m The maximum value of the target pressure upper limit data P Tmax , pressure data in the fiber pumping path P m The minimum value of the target pressure lower limit data P Tmin The target pressure upper limit data P Tmax is the target pressure lower limit data P Tmin are set within the range of the following formula (5). Preferably, the target pressure upper limit data P Tmax The target pressure lower limit data P Tmin are set within the range given by the following formula (7). Tmax and the target pressure lower limit data P Tmin In this case, the target pressure upper limit memory (O) may also serve as the target pressure lower limit memory (P). P min ≦P Tmax ≦P max ...(4) P min ≦P Tmin ≦P max ...(5) P min <P Tmax <P max ...(6) P min <P Tmin <P max ...(7)

[0037] Pressure data P in the fiber pumping path measured by a pressure gauge (H) m to the calculation device (K), and the allowable pressure upper limit data P stored in the allowable pressure upper limit memory (I) is maxto the calculation device (K), and when the above formula (1) is satisfied, a transmission command is sent to the excess pressure transmission device (M), and when the excess pressure transmission device (M) receives the transmission command, it notifies people nearby (for example, the person operating the fiber spraying device of the present invention and / or the person monitoring the fiber spraying device of the present invention) that the pressure is excessive, and the person who receives the notification recognizes that the pressure in the fiber pumping path exceeds the allowable pressure upper limit. The person who recognizes the excessive pressure directly, or the person operating the fiber spraying device of the present invention or the person monitoring the fiber spraying device of the present invention who has been informed of the excessive pressure by the person, issues a suppression command by operating the control device (L). This suppression command suppresses the supply of fiber from the quantitative supply device of the cotton opener (C) to the fiber pumping pipe. As a result, the pressure data P m becomes smaller. Then, the above formula (1) is no longer satisfied. When this happens, the transmission command is no longer sent, and the overpressure transmission device (M) no longer transmits the fact that the pressure is over. If the transmission mechanism of the overpressure transmission device (M) is a display device, the overpressure display disappears, if it is a rotating light or indicator lamp, it goes out, if it is an alarm device, the alarm goes off, and if it is a vibrator, the vibration stops.

[0038] Furthermore, when the supply of fiber from the quantitative supply device of the fiber defibrator (C) to the fiber pressure pipe is restricted, the pressure data P m The fiber spraying device of the present invention is equipped with a target pressure upper limit memory (O), a target pressure lower limit memory (P) and a pressure normal transmission device (Q), and the target pressure upper limit data P stored in the target pressure upper limit memory (O) is Tmax and the target pressure lower limit data P stored in the target pressure lower limit memory (P) Tminto the arithmetic device (K), and when the above formula (3) is satisfied, the normal pressure transmission device (Q) notifies people nearby (for example, the person operating the fiber spraying device of the present invention and / or the person monitoring the fiber spraying device of the present invention) that the pressure is within the target range, and the person who receives the notification recognizes that the pressure in the fiber pressure-feeding path is within the target range. The person who recognizes that the pressure is within the target range directly, or the person operating the fiber spraying device of the present invention or the person monitoring the fiber spraying device of the present invention who has been informed by the person that the pressure is within the target range, operates the control device (L) to issue a hold command. This hold command maintains the amount of fiber supplied per short period of time from the fixed-volume supply device of the cotton opener (C) to the fiber pressure-feeding pipe. As a result, the pressure data P in the fiber pressure-feeding path m becomes constant.

[0039] Pressure data P in the fiber pumping path measured by a pressure gauge (H) m is transmitted to the calculation device (K), and the allowable pressure lower limit data P stored in the allowable pressure lower limit memory (J) is min to the calculation device (K), and when the above formula (2) is satisfied, a transmission command is sent to the pressure deficiency transmission device (N), and when the transmission command is received, the pressure deficiency transmission device (N) notifies people nearby (for example, the person operating the fiber spraying device of the present invention and / or the person monitoring the fiber spraying device of the present invention) that the pressure is insufficient, and the person who receives the notification recognizes that the pressure in the fiber pumping path is below the allowable pressure lower limit, that is, that there is a pressure deficiency. The person who recognizes this pressure deficiency, either directly or by the person operating the fiber spraying device of the present invention or the person monitoring the fiber spraying device of the present invention who has been informed of the pressure deficiency by the person, issues an increase command by operating the control device (L). This increase command increases the supply of fiber from the quantitative supply device of the cotton opener (C) to the fiber pumping pipe. As a result, the pressure data P m becomes large. Then, the above formula (2) is no longer satisfied. Then, the transmission command is no longer sent, and the pressure shortage transmission device (N) no longer transmits the fact that the pressure is insufficient.

[0040] Furthermore, when the supply of fiber from the quantitative supply device of the fiber splitter (C) to the fiber pressure pipe increases, the pressure data P m The fiber spraying device of the present invention is equipped with a target pressure upper limit memory (O), a target pressure lower limit memory (P) and a pressure normal transmission device (Q), and the target pressure upper limit data P stored in the target pressure lower limit memory (P) is Tmax and the target pressure lower limit data P stored in the target pressure lower limit memory (P) Tmin to the arithmetic device (K), and when the above formula (3) is satisfied, the normal pressure transmission device (Q) notifies people nearby (for example, the person operating the fiber spraying device of the present invention and / or the person monitoring the fiber spraying device of the present invention) that the pressure is within the target range, and the person who receives the notification recognizes that the pressure in the fiber pumping path is within the target range. The person who recognizes that the pressure is within the target range directly, or the person operating the fiber spraying device of the present invention or the person monitoring the fiber spraying device of the present invention who has been informed by the person that the pressure is within the target range, operates the control device (L) to issue a hold command. This hold command maintains the amount of fiber supplied per unit time from the fixed quantity supply device of the cotton opener (C) to the fiber pumping pipe. As a result, the pressure data P in the fiber pumping path m becomes constant. By operating the control device (L) as described above, the pressure data P m The target pressure lower limit data P Tmin to target pressure upper limit data P Tmax Within the range of the allowable pressure lower limit data P min to allowable pressure upper limit data P max Since the supply of fibers such as rock wool to the fiber pumping path can be kept within this range, pulsation is unlikely to occur within the fiber pumping path, fine particles of fibers remaining in the fiber pumping path are unlikely to continue to be ejected from the fiber discharge port even when the supply of fibers such as rock wool to the fiber pumping path is stopped, and fibers are unlikely to become clogged in the fiber pumping path.

[0041] The fiber spraying method of the present invention is a fiber spraying method using the fiber spraying device, comprising: feeding fibers into a fiber inlet of the fiber defiberizer (C) and spraying the fibers from the fiber spray nozzle (A) through the fiber spray nozzle (A); and supplying a liquid additive from the liquid additive supply source (G) and spraying the liquid additive from the fiber spray nozzle (A) through the fiber spray nozzle (A) to spray a mixture of the fibers and the liquid additive onto an object to be coated, A person who knows that the pressure in the fiber pressure-feeding path exceeds the allowable pressure upper limit value through the pressure excess transmission device (M) causes the control device (L) to issue a suppression command, and the supply of fiber from the quantitative supply device of the cotton defibrator (C) to the fiber pressure-feeding pipe is suppressed by the suppression command. A person who knows through the pressure deficiency transmission device (N) that the pressure in the fiber pressure path has fallen below the allowable pressure lower limit and is therefore underpressure can have the control device (L) issue an increase command, which in turn increases the supply of fiber from the fixed quantity supply device of the cotton defibering machine (C) to the fiber pressure pipe.

[0042] It is preferable that a person who has learned through the normal pressure transmission device (Q) that the pressure in the fiber pressure path is within the target pressure range from the target lower pressure limit value to the target upper pressure limit value causes the control device (L) to issue a holding command, and that the amount of fiber supplied per unit time from the constant volume supply device of the cotton deflocculator (C) to the fiber pressure pipe is held constant by said holding command. EXAMPLES

[0043] The present invention will be described below based on an embodiment, but the present invention is not limited to the embodiment. Fig. 1 shows a schematic diagram of an example of the fiber spraying device of the present invention. The fiber spraying device 10 includes a fiber spraying nozzle 1, a fiber pressure-feeding hose 9, a cotton loosening machine 20, a blower 14, a steel pipe to which a pressure gauge 2 is attached so as to measure the pressure inside the pipe, a liquid additive hose 6, a liquid additive pump 7, a conversion device 31, a calculation device 30, an allowable pressure upper limit memory 32, an allowable pressure lower limit memory 33, a target pressure upper limit memory 34, a target pressure lower limit memory 35, a control device 40, an excess pressure transmission device (display device) 50, an underpressure transmission device (display device) 51, and a normal pressure transmission device (display device) 53.

[0044] The fiber spray nozzle 1 comprises a fiber conduit having one end serving as a fiber nozzle and the other end serving as a fiber pressure-feed hose connection port, and a liquid additive nozzle 3 disposed on the central axis of the fiber conduit (fiber passage). The liquid additive nozzle 3 is one end of a metal tube opening, the other end of which protrudes outside the fiber conduit, and a liquid additive hose 6 is connected thereto as a liquid additive hose connection port. The other end of the liquid additive hose 6 is connected to the outlet of a liquid additive pump 7. A suction hose is connected to the inlet of the liquid additive pump 7, and the other end of the suction hose is inserted into the liquid additive 4 stored in a liquid additive storage tank 8.

[0045] A fiber pressure-feed hose 9 is connected to the fiber pressure-feed hose connection port of the fiber spray nozzle 1, and the other end of the fiber pressure-feed hose 9 is connected to an opening of a metal pipe in which a pressure gauge 2 is installed so that the internal pressure can be measured. The other end of the metal pipe is connected to a fiber pressure-feed pipe 26 of the cotton opener 20. The other end of the fiber pressure-feed pipe 26 is connected to a blower (Roots blower) 14. The blower (Roots blower) 14, the fiber pressure-feed pipe 26 of the cotton opener 20, the metal pipe in which the pressure gauge 2 is installed, the fiber pressure-feed hose 9 and the fiber conduit of the fiber spray nozzle 1 are all interconnected, and a fiber pressure-feed path is formed from the fiber pressure-feed pipe 26 of the cotton opener 20 to the fiber conduit (fiber injection port) of the fiber spray nozzle 1.

[0046] The defibrillator 20 is equipped with a fiber pressure feed pipe 26, a fiber inlet consisting of a hopper 23, a first defibrillating section 21 (defibrillating device), a second defibrillating section 22 (defibrillating device), a screw feeder 24 (quantitative supply device), a rotary feeder 25 (quantitative supply device), and a motor (not shown). The first defibrillating section 21 is equipped with a plurality of L-shaped steel rods on a rotating shaft, and the rotating shaft is rotated by driving the motor, and when the L-shaped steel rods rotate, they hit the fibers 11 put into the hopper 23, so that the fibers 11 are defibrated and fall onto the screw feeder 24. When the screw feeder 24 is rotated by driving the motor, the defibrated fibers are supplied in a fixed amount to the second defibrillating section 22. The second defibrillating section 22 has a structure in which a plurality of steel projections (I-shaped steel rods) are attached to the rotating shaft. The fibers sent to the second defibrillating section 22 hit the I-shaped steel rods rotating by driving the motor, and become further defibrated fibers 5. The granular fibers 5 enter a pocket formed by two flat plates welded to the rotating shaft of a rotary feeder 25 arranged below the second defibrating section 22, and then, as the rotating shaft of the rotary feeder 25 is rotated by a motor, a fixed amount of the fibers is supplied to a fiber pressure-feeding pipe 26 arranged below the rotary feeder 25. When the fibers are a dry mixture of granular fibers or short fibers such as blended cotton and a binder such as cement, the dry mixture in which the granular fibers or short fibers have been defibrated and broken down into fine particles is supplied to the fiber pressure-feeding pipe 26 in a fixed amount.

[0047] The loosened fibers 5 supplied in a fixed amount to the fiber pressure pipe 26 are pressure-fed through the fiber pressure path to the fiber injection nozzle 1 by the air flow from the blower 14, and are sprayed (discharged) from the fiber injection nozzle. Meanwhile, the liquid additive 4 stored in the liquid additive storage tank 8 is sucked by the liquid additive pressure pump 7, and then sprayed from the liquid additive injection nozzle 3 of the fiber spray nozzle 1 through the liquid additive hose 6, where it is merged and mixed with the loosened fibers 5 sprayed (discharged) from the fiber injection nozzle, and sprayed onto the object to be coated 13, forming a fiber layer made of the merged mixture on the surface of the object to be coated 13.

[0048] The pressure inside the fiber pumping path is measured by the pressure gauge 2. The hose length was set to 20m, 40m, and 60m, and a mixed cotton (rock wool / cement mixed cotton) was used as the fiber. The amount of fiber supplied per unit time to the fiber pumping pipe 26 (fiber pumping path) was changed, and the hose pressure (pressure inside the fiber pumping path) and the fiber discharge time were measured as shown below to determine the fiber conveying speed. The results are shown in Figure 2.

[0049] - Blended cotton supply volume per unit time The spray nozzle was removed from the fiber pressure-feed hose, a hemp bag was attached to the tip of the fiber pressure-feed hose, and only the mixed cotton was sprayed out for 30 seconds. The mass W of the material that entered the hemp bag at that time was measured, and the supply amount S of the mixed cotton per unit time was calculated using the following formula (8). The supply amount can be set by controlling the number of rotations per unit time of the motor of the cotton opener 20 based on a command (instruction) from the control device 40. S = W / 0.5 (8)

[0050] - Cotton blend discharge time The time from when the rotation of the rotary feeder 25 of the cotton opener was stopped, i.e., when the supply of the mixed cotton to the fiber pressure-feeding pipe 26 was stopped, until the rock wool granular fibers contained in the mixed cotton were completely discharged from the fiber pressure-feeding path was measured, and this was taken as the discharge time t of the mixed cotton. Furthermore, the length L of the fiber pressure-feeding hose (hose length) was divided by the discharge time t, and this was taken as the conveying speed V, which was calculated using the following formula (9). V = L / t (9)

[0051] From FIG. 2, it can be seen that as the amount of fiber (cotton blend) supplied to the fiber pumping pipe 26 (fiber pumping path) per unit time increases, the hose pressure (pressure in the fiber pumping path) increases and the conveying speed tends to decrease. If the conveying speed decreases too much, the fiber may become clogged in the fiber pumping path. In addition, the amount of fiber (cotton blend) supplied to the fiber pumping pipe 26 (fiber pumping path) per unit time can also be estimated from the hose pressure (pressure in the fiber pumping path). If the hose pressure (pressure in the fiber pumping path) is too high, the fiber may easily become clogged in the fiber pumping path, pulsation may easily occur, and fine fiber particles may easily continue to be ejected from the fiber discharge port. In addition, if the hose pressure (pressure in the fiber pumping path) is too low, the amount of fiber (cotton blend) supplied to the fiber pumping pipe 26 (fiber pumping path) per unit time is too small, resulting in a long construction time.

[0052] In the fiber spraying device 10 shown in FIG. 1, pressure data P m can be sent via the conversion device 31 to the calculation device 30, the allowable pressure upper limit memory 32, the allowable pressure lower limit memory 33, the target pressure upper limit memory 34, and the target pressure lower limit memory 35. Prior to the actual construction, the amount of fiber supplied to the fiber pressure feed pipe 26 per unit time is changed, and the fibers are experimentally supplied to the fiber pressure feed pipe 26 and sprayed (discharged) from the fiber spray nozzle 1's fiber injection port to confirm that no pulsation or clogging occurs in the fiber pressure feed path and that no large fluctuations in the pressure in the fiber pressure feed path occur. The pressure data P m These are taken as four points, and are sent in ascending order of pressure to the allowable pressure lower limit memory 33, the target pressure lower limit memory 35, the target pressure upper limit memory 34, and the allowable pressure upper limit memory 32, respectively, as the allowable pressure lower limit data P min , target pressure lower limit data P Tmin , target pressure upper limit data P Tmax , allowable pressure upper limit data P max The allowable pressure lower limit data P min , target pressure lower limit data P Tmin , target pressure upper limit data P Tmax , allowable pressure upper limit data Pmax Each piece of data may be input numerically, or data recorded on a recording medium such as a read-only memory (ROM) or random access memory (RAM) provided in the fiber spraying device 10 or on a recording medium of an external device (e.g., a server) may be read and used.

[0053] The pressure data P in the fiber pumping path measured by pressure gauge 2 during the actual fiber spraying work m is sent to the arithmetic unit 30 via the conversion unit 31. Also, the allowable pressure upper limit data P max and the allowable pressure lower limit data P stored in the allowable pressure lower limit memory 33 min is transmitted to the arithmetic unit 30. It is confirmed in the arithmetic unit 30 whether the following equation (1) or the following equation (2) is satisfied. P m >P max ...(1) P m <P min ...(2)

[0054] When the above formula (1) is satisfied, the pressure in the fiber pumping path is too high, that is, the amount of fiber supplied to the fiber pumping pipe 26 per unit time is too large. Therefore, a signal indicating that the above formula (1) is satisfied, that is, a transmission command, is sent from the calculation device 30 to the excess pressure transmission device (display device) 50. The excess pressure transmission device (display device) 50, which has received the transmission command, displays the fact that the pressure is exceeded, and notifies people in the vicinity (e.g., a person operating the fiber spraying device 10 and / or a person monitoring the fiber spraying device 10). Suitable examples of the display of the excess pressure include displaying the words "excess pressure" on the display, displaying the measured pressure value in red on the display, and turning on a red rotating light. A person who receives the notification, that is, who recognizes the display of the excess pressure, recognizes that the pressure in the fiber pumping path exceeds the allowable pressure upper limit. The person who recognizes the excessive pressure directly, or the person operating the fiber spraying device 10 or the person monitoring the fiber spraying device 10 who has been informed of the excessive pressure by the person who recognizes the excessive pressure, operates the control device 40 to issue a suppression command and transmit it to the cotton deflocculating machine 20. The defibrillator 20, which has received the suppression command, suppresses the number of rotations per unit time of the motor, thereby suppressing the number of rotations per unit time of each of the rotating shafts of the screw feeder 24, the second defibrillator section 22, and the rotary feeder 25, and reducing the amount of fiber supplied per unit time to the fiber pressure-feeding pipe 26. The suppression command from the control device 40 may be directly received by the motor provided in the defibrillator 20, and the number of rotations per unit time of the motor may be suppressed, suppressing the number of rotations per unit time of each of the rotating shafts of the screw feeder 24, the second defibrillator section 22, and the rotary feeder 25, and reducing the amount of fiber supplied per unit time to the fiber pressure-feeding pipe 26. When the amount of fiber supplied to the fiber pumping pipe 26 per unit time decreases, the pressure in the fiber pumping path decreases, and the pressure data P m becomes smaller, and the above formula (1) no longer holds. Then, the transmission command is no longer sent from the calculation device 30 to the overpressure transmission device (display device) 50, and the overpressure transmission device (display device) 50 no longer displays that the pressure is over.

[0055] When the above formula (2) is satisfied, the pressure in the fiber pumping path is too low, that is, the amount of fiber supplied to the fiber pumping pipe 26 per unit time is too small, and a signal indicating that the above formula (2) is satisfied, that is, a transmission command, is sent from the calculation device 30 to the pressure deficiency transmission device (display device) 51. The pressure deficiency transmission device (display device) 51 that has received the transmission command displays the fact that the pressure is insufficient to inform people in the vicinity (for example, a person operating the fiber spraying device of the present invention and / or a person monitoring the fiber spraying device of the present invention). Suitable examples of the display of the pressure deficiency include displaying the words "pressure deficiency" on the display, displaying the pressure measurement value in yellow on the display, and turning on a yellow rotating light. A person who has received the notification, that is, who has recognized the display of the pressure deficiency, recognizes that the pressure in the fiber pumping path is below the allowable pressure lower limit. The person who recognizes this lack of pressure directly, or the person operating the fiber spraying device 10 or the person monitoring the fiber spraying device 10 who has been informed of the lack of pressure by this person, operates the control device 40 to issue an increase command and send it to the cotton deflocculating machine 20. The defibrillator 20, which has received the increase command, increases the rotations per unit time of the motor, thereby increasing the number of rotations per unit time of each of the rotating shafts of the screw feeder 24, the second defibrillator section 22, and the rotary feeder 25, and increasing the amount of fiber supplied per unit time to the fiber pressure-feeding pipe 26. The increase command from the control device 40 may be directly received by the motor provided in the defibrillator 20, which suppresses the number of rotations per unit time of the motor and increases the number of rotations per unit time of each of the rotating shafts of the screw feeder 24, the second defibrillator section 22, and the rotary feeder 25, thereby increasing the amount of fiber supplied per unit time to the fiber pressure-feeding pipe 26. When the amount of fiber supplied to the fiber pumping pipe 26 per unit time increases, the pressure in the fiber pumping path increases, and the pressure data P mbecomes large, and the above formula (2) is no longer valid. Then, the transmission command is no longer sent from the arithmetic device 30 to the pressure deficiency transmission device (display device) 51, and the pressure deficiency transmission device (display device) 51 no longer displays that the pressure is over.

[0056] By repeating these steps, the pressure in the fiber pumping path is kept within an allowable range, i.e., the amount of fibers supplied to the fiber pumping pipe 26 per unit time is kept within an allowable range, pulsation in the fiber pumping path is unlikely to occur, fine particles of fibers remaining in the fiber pumping path are unlikely to continue to be ejected from the fiber discharge port even if the supply of fibers such as rock wool to the fiber pumping path is stopped, and fibers are unlikely to clog the fiber pumping path. An image diagram of the pressure in the fiber pumping path is shown in Figure 3.

[0057] Furthermore, when the above formula (1) is satisfied, a signal (transmission command) indicating that the above formula (1) is satisfied is sent from the calculation device 30 to the excess pressure transmission device (display device) 50, and the excess pressure transmission device (display device) 50 that receives the transmission command displays that the pressure is excessive to notify people in the vicinity, and a person who receives the notification and recognizes that the pressure in the fiber pumping path is excessive, or a person who is informed of the excessive pressure by this person, operates the control device 40 to issue a suppression command and transmit it to the defatting machine 20, thereby suppressing the number of rotations per unit time of each of the rotating shafts of the screw feeder 24, the second defatting section 22, and the rotary feeder 25, and reducing the amount of fiber supplied to the fiber pumping pipe 26 per unit time. Then, when the amount of fiber supplied to the fiber pumping pipe 26 per unit time decreases, the pressure in the fiber pumping path decreases, and the pressure data P m becomes small and the above formula (1) no longer holds, the transmission command is no longer sent from the calculation device 30 to the overpressure transmission device (display device) 50, and the overpressure transmission device (display device) 50 no longer displays that the pressure is over the limit. Furthermore, when the amount of fiber supplied to the fiber pumping pipe 26 per unit time decreases, the pressure in the fiber pumping path decreases further, and the pressure data P m becomes smaller. The target pressure upper limit data P stored in the target pressure upper limit memory 34 Tmax and the target pressure lower limit data P stored in the allowable target pressure lower limit memory 35 Tmin is transmitted to the arithmetic unit 30. It is confirmed in the arithmetic unit 30 whether the following equation (3) is satisfied. P Tmin ≦P m ≦P Tmax ...(3) Pressure data P in the fiber pumping path m satisfies the above formula (3), that is, when the pressure in the fiber pumping path falls within the target pressure range from the target pressure lower limit value to the target pressure upper limit value, a normal state transmission command is sent from the calculation device 40 to the normal pressure transmission device (display device) 53. The normal pressure transmission device (display device) 53, which has received the normal state transmission command, activates a mechanism (display mechanism) to inform people in the vicinity that the pressure in the fiber pumping path is within the target range. Suitable examples of an indication that the pressure in the fiber pumping path is within the target range include displaying the words "pressure normal" on the display, displaying the pressure measurement value in blue on the display, turning on a blue lamp, etc. A person who receives the indication, i.e., recognizes the indication that the pressure in the fiber pumping path is within the target range, recognizes that the pressure in the fiber pumping path is within the target range. A person who recognizes that the pressure in the fiber pressure path is within the target range directly, or a person operating the fiber spraying device 10 who has been informed by this person that the pressure is insufficient, operates the control device 40 to issue a hold command and send it to the cotton deflocculating machine 20. The defibrillator 20 which has received the hold command holds the number of rotations of the motor constant, thereby holding the number of rotations of each of the rotating shafts of the screw feeder 24, the second defibrillator section 22 and the rotary feeder 25 constant, and holding the amount of fiber supplied to the fiber pressure-feeding pipe 26 constant per unit time. The hold command from the control device 40 may be directly received by the motor provided in the defibrillator 20, which holds the number of rotations of the motor constant, holds the number of rotations of each of the rotating shafts of the screw feeder 24, the second defibrillator section 22 and the rotary feeder 25 constant, and holds the amount of fiber supplied to the fiber pressure-feeding pipe 26 constant per unit time.

[0058] When the amount of fiber supplied to the fiber pumping pipe 26 per unit time is maintained, the pressure in the fiber pumping path is within a target range. When the amount of fiber supplied to the fiber pumping pipe 26 per unit time is maintained, pulsation in the fiber pumping path is unlikely to occur, and even if the supply of fibers such as rock wool to the fiber pumping path is stopped, fine particles of fibers remaining in the fiber pumping path are unlikely to continue to be ejected from the fiber discharge port, and fibers are unlikely to clog the fiber pumping path. An image diagram of the pressure in the fiber pumping path is shown in Figure 4. [Industrial Applicability]

[0059] The present invention can be suitably used, for example, in construction work in which fibers such as rock wool or a fiber composition, which is used for the purpose of imparting fire resistance, fire prevention, sound absorption, and / or heat insulation properties, etc. to structural components, are sprayed to form a fiber composition layer. [Explanation of symbols]

[0060] 1 Fiber spray nozzle 2 Pressure gauge 3. Liquid additive nozzle 4. Liquid additive 5 Granular fiber 6 Liquid additive pressure delivery hose 7 Liquid additive pressure pump 8 Liquid additive storage tank 9 Fiber pressure feeding hose 10 Fiber spraying device 11 Fiber or fiber dry composition 12 Fiber layer made of the mixed mixture 13 Covered object 14 Blower 20 Cotton opening machine 21 First cotton opening section 22 Second De-waxing Section 23 Hopper 24 Screw feeder 25 Rotary feeder (fixed quantity feeder) 26 Fiber Pressure Pipe 30 Calculation device 31 Conversion device 32 Memory for upper limit of permissible pressure 33 Memory for lower limit of permissible pressure 34 Memory for upper limit of target pressure 35 Memory for lower limit of target pressure 40 Control device 50 Overpressure transmission device (display device) 51 Underpressure transmission device (display device) 53 Pressure normal transmission device (display device)

Claims

1. (A) a fiber spray nozzle having a fiber passage having a fiber nozzle at one end and a fiber pressure-feed hose connection port at the other end, one or more liquid additive nozzles, and one or more liquid additive hose connection ports; (B) a fiber pressure-feeding hose; (C) a fiber defatting machine having a fiber inlet, a fiber defatting device, a quantitative supply device, a motor, and a fiber pressure feed pipe; (D) a blower; (E) a liquid additive hose; (F) a liquid additive pump having an inlet and an outlet; The fiber pressure-feed hose is connected to the fiber pressure-feed hose connection port of the fiber spray nozzle, and the liquid additive hose is connected to the liquid additive hose connection port of the fiber spray nozzle, the fiber pressure-feeding hose is connected to one end of the fiber pressure-feeding pipe of the fiber opener, and the blower is connected to the other end of the fiber pressure-feeding pipe, forming a fiber pressure-feeding path from the fiber pressure-feeding pipe of the fiber opener to the fiber injection port of the fiber spray nozzle; A fiber spraying device, the liquid additive hose being connected to the discharge port of the liquid additive pump, and the liquid additive supply source being connected to the inlet of the liquid additive pump, Furthermore, (H) a pressure gauge capable of transmitting pressure data; (I) a memory for storing an upper limit of an allowable pressure; (J) a memory for storing an allowable pressure lower limit value; (K) a calculation device; (L) a control device; (M) an overpressure transmission device; (N) Pressure shortage transmission device Equipped with The pressure gauge is disposed in the fiber pumping path, and pressure data P in the fiber pumping path measured by the pressure gauge is m to the computing device; The allowable pressure upper limit data P stored in the allowable pressure upper limit memory max to the arithmetic device, and when the following formula (1) is satisfied, a transmission command is sent to the overpressure transmission device, and when the overpressure transmission device receives the transmission command, it notifies surrounding people that the pressure is overpressure, The allowable pressure lower limit data P stored in the allowable pressure lower limit memory ｍｉｎ to the arithmetic device, and when the following formula (2) is satisfied, a transmission command is sent to the pressure deficiency transmission device, and when the transmission command is received, the pressure deficiency transmission device notifies surrounding people that the pressure is insufficient, The supply of fibers from the quantitative supply device of the fiber defibrator to the fiber pressure pipe is increased in response to an increase command from the control device; The supply of fibers from the quantitative supply device of the fiber defibrator to the fiber pressure pipe is restricted by a restriction command from the control device. A fiber spraying device characterized by P m >P max ・・・・・(1) P m <P min ・・・・・(2)

2. Furthermore, (O) a memory for a target pressure upper limit value and / or (P) a memory for a target pressure lower limit value; Furthermore, (Q) Equipped with a pressure normal transmission device, The target pressure upper limit data P stored in the target pressure upper limit memory Tmax and the target pressure lower limit data P stored in the target pressure lower limit memory Tmin When the following equation (3) is satisfied after transmitting the above to the arithmetic unit, The fiber spraying device of claim 1, characterized in that a normal state transmission command from the control device is sent to the normal pressure transmission device, and the normal pressure transmission device, upon receiving the normal state transmission command, is equipped with a mechanism for notifying people in the vicinity that the pressure in the fiber pumping path is within a target range. P Tmin ≦P m ≦P Tmax ・・・・・(3)

3. 3. A fiber spraying method using the fiber spraying device according to claim 1 or 2, comprising: feeding fibers into a fiber inlet of the fiber defiberizer and spraying the fibers from a fiber spray nozzle; and supplying a liquid additive from a liquid additive supply source and spraying the liquid additive from the fiber spray nozzle to spray a mixture of the fibers and the liquid additive onto an object to be coated, A person who has become aware of the pressure in the fiber pressure-feeding path exceeding the allowable pressure upper limit value through the pressure excess transmission device causes a control device to issue a suppression command, and the supply of fiber from the quantitative supply device of the fiber defibrator to the fiber pressure-feeding pipe is suppressed by the suppression command. A fiber spraying method characterized in that a person who, upon learning through the pressure deficiency transmission device that the pressure in the fiber pressure-feeding path has fallen below the allowable pressure lower limit value and is experiencing a pressure deficiency, issues an increase command from a control device, and the increase command increases the supply of fiber from the quantitative supply device of the cotton-dissolving machine to the fiber pressure-feeding pipe.

4. A fiber spraying method as described in claim 3, characterized in that the fiber spraying device is equipped with a pressure normal transmission device, and when a person knows through said pressure normal transmission device that the pressure in the fiber pressure transport path is within a target pressure range from a target pressure lower limit value to a target pressure upper limit value, a holding command is issued from a control device, and the amount of fiber supplied per unit time from the fixed quantity supply device of the cotton deflocculating machine to the fiber pressure transport pipe is maintained constant by said holding command.

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