Mixing and de-coating device

Abstract

To reduce labor costs in the application of fire-resistant coatings using dry construction methods. [Solution] The kneading and disintegrating cotton device 20 comprises a crushing section 21 having a crushing blade 22a for cutting and crushing mat-shaped fire-resistant cotton material, a kneading section 24 for mixing the fire-resistant cotton material crushed by the crushing section 21 with a solidifying agent and mineral oil to produce a mixture, and a dispensing section 34 for sending the mixture produced in the kneading section 24 to the spraying device 10.

Description

Technical Field

[0001] The present invention relates to a kneading and defibrating device.

Background Art

[0002] Patent Document 1 discloses a system including a defibrator that supplies rock wool to a nozzle for spraying a refractory coating material toward a refractory coating target.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the semi-dry method of mixing cement slurry and rock wool immediately before spraying the refractory coating material toward the refractory coating target as in the invention described in Patent Document 1, it is necessary to clean the supply hose of the cement slurry every time the spraying operation is interrupted, and cement sticking in the supply hose flows into the injection nozzle and the injection nozzle gradually clogs, so it is necessary to frequently clean the injection nozzle, etc., which significantly reduces the workability in the spraying operation of the refractory coating material. On the other hand, in the dry method of mixing a premix material in which rock wool and cement are pre-mixed and water immediately before spraying, there is no need to clean the supply hose or the risk of the injection nozzle clogging, but since the premix material manufactured in a factory or the like is expensive, in high-rise buildings or large-scale buildings that require a relatively large amount of refractory coating material, there is a risk that the working cost in the spraying operation of the refractory coating material will significantly increase.

[0005] An object of the present invention is to reduce the working cost in the spraying operation of the refractory coating material by the dry method. [Means for solving the problem]

[0006] The present invention relates to a mixing and decontamination device that supplies a mixture of fire-resistant cotton material, a solidifying agent, and mineral oil to a spraying device that sprays fire-resistant coating material onto objects to be covered with fire-resistant coating material using a dry method within a building. A premixer section that premixes the solidifying agent and mineral oil, The apparatus comprises a crushing section having crushing blades for cutting and crushing mat-shaped fire-resistant cotton material, a kneading section for mixing the crushed fire-resistant cotton material, a solidifying agent, and mineral oil to produce a mixture, and a dispensing section for sending the mixture produced in the kneading section to a spraying device. The solidifying agent and mineral oil mixed in the premixer section are supplied to the fire-resistant cotton material in the crushing section and sent together with the fire-resistant cotton material to the kneading section. The present invention is a kneading and decontaminating device that supplies a mixture of fire-resistant cotton material, solidifying agent and mineral oil to a spraying device that sprays fire-resistant coating material onto objects to be covered with fire-resistant coating material in a dry method within a building, comprising: a premixer section that premixes the solidifying agent and mineral oil; a crushing section having crushing blades that cut and crush mat-shaped fire-resistant cotton material; a kneading section that mixes the fire-resistant cotton material crushed by the crushing section, the solidifying agent and mineral oil to produce a mixture; and a discharge section that sends the mixture produced in the kneading section to the spraying device, wherein the solidifying agent and mineral oil mixed in the premixer section are supplied to the fire-resistant cotton material before it is put into the crushing section and sent together with the fire-resistant cotton material through the crushing section to the kneading section. Furthermore, the present invention relates to a kneading and decontamination device that supplies a mixture of fire-resistant cotton material, a solidifying agent, and mineral oil to a spraying device that sprays fire-resistant coating material onto objects to be covered with fire-resistant coating material using a dry method within a building, comprising: a premixer section that premixes the solidifying agent and mineral oil; a crushing section having crushing blades that cut and crush mat-shaped fire-resistant cotton material; a kneading section that mixes the fire-resistant cotton material crushed by the crushing section, the solidifying agent, and the mineral oil to produce a mixture; and a discharge section that sends the mixture produced in the kneading section to the spraying device, wherein the kneading section has a ribbon mixer that mixes the crushed fire-resistant cotton material, the solidifying agent, and the mineral oil, and the solidifying agent and mineral oil mixed in the premixer section are supplied to the fire-resistant cotton material being stirred in the ribbon mixer from an opening provided approximately in the center in the axial direction of the rotation axis of the ribbon mixer. [Effects of the Invention]

[0007] According to the present invention, the labor costs in the spraying of fire-resistant coating materials using a dry method can be reduced. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing an example of the work performed using a fire-resistant coating material supply system equipped with a mixing and decomposing device according to an embodiment of the present invention. [Figure 2] This is a schematic diagram showing the configuration of a fire-resistant coating material supply system equipped with a mixing and decomposing device according to an embodiment of the present invention. [Figure 3] This is a schematic diagram showing the configuration of a cotton-dissolving apparatus according to an embodiment of the present invention. [Figure 4] This is a cross-sectional view showing a cross-section along line AA in Figure 3, and is a diagram intended to explain the mixing state. [Modes for carrying out the invention]

[0009] Hereinafter, an embodiment of the kneading and decoction apparatus of the present invention will be described with reference to the drawings.

[0010] The kneading and decontamination apparatus according to an embodiment of the present invention is used to supply a mixture of fire-resistant cotton material, a solidifying agent, and mineral oil to a spraying apparatus that sprays fire-resistant coating material onto objects to be covered with fire-resistant coating using a dry method within a building.

[0011] First, with reference to Figures 1 and 2, a fire-resistant coating material supply system 100 equipped with a mixing and de-mixing device 20 according to an embodiment of the present invention will be described. Figure 1 is a schematic diagram showing an example of work performed using the fire-resistant coating material supply system 100, and Figure 2 is a schematic configuration diagram of the fire-resistant coating material supply system 100.

[0012] As shown in Figure 1, the fire-resistant coating material supply system 100 is a system that supplies fire-resistant coating material to a spraying device 10 that sprays fire-resistant coating material onto objects to be covered with fire-resistant coating material within a building C that is under construction or an existing building.

[0013] The objects to which fire-resistant coatings are sprayed are mainly steel structures such as columns and beams, and rock wool, a mineral fiber with excellent heat insulation and fire resistance, is primarily used as the fire-resistant coating material.

[0014] The fire-resistant coating material supply system 100 is a system comprising a mixing and decontamination device 20 that supplies a mixture of rock wool as a fire-resistant material and cement and mineral oil as solidifying agents to a spraying device 10, a pumping device 40 that pressurizes the mixture produced by the mixing and decontamination device 20 to the spraying device 10, and a pressurized water supply device 50 that supplies pressurized water to the spraying device 10. This system is used in so-called dry construction methods, where the mixture of rock wool, cement and mineral oil and pressurized water are supplied separately to the spraying device 10.

[0015] The mixing and deburring device 20 includes a crushing section 21 for crushing and deburring rock wool, a premixer section 23 for pre-mixing cement and mineral oil, a mixing section 24 for mixing the rock wool deburred by the crushing section 21 with the cement and mineral oil mixed in the premixer section 23 to produce a mixture, and a discharge section 34 for sending the mixture produced in the mixing section 24 to the spraying device 10. While it is possible to omit the premixer section 23 and instead introduce the cement and mineral oil into the crushing section 21 together with the rock wool, it is preferable to pre-mix the cement with mineral oil to facilitate the mixing and deburring of dry cement with the dry rock wool. The specific configuration of the mixing and deburring device 20 will be described later.

[0016] As shown in Figure 1, the mixing and deburring device 20 is installed on the first floor or basement of building C, which is suitable for storing and loading rock wool and cement. Alternatively, the mixing and deburring device 20 may be installed not inside building C, but within the premises of building C or in a workshop located within the premises, as indicated by the dashed line in Figure 1.

[0017] Furthermore, the cotton mixing and decongesting device 20 can be equipped with casters 38, which will be described later, as a travel mechanism. This allows the cotton mixing and decongesting device 20 to be freely moved to any location within building C and on the site of building C.

[0018] As shown in Figure 3 (described later), the pumping device 40 is an air blower integrated with the mixing and decongesting device 20, and pumps the mixture sent from the mixing and decongesting device 20 to the spraying device 10 through supply hoses 62, 64, and 66. Note that transparent vinyl hoses may be used for the supply hoses 62, 64, and 66 so that the state of the mixture moving inside can be observed. Furthermore, the pumping device 40 may be configured separately from the mixing and decongesting device 20.

[0019] If the supply hoses 62, 64, and 66 are long, or if the spraying device 10 is located on an upper floor of building C, a buffer device 54 capable of temporarily storing the mixture is provided at the point where the supply hoses 62, 64, and 66 are connected.

[0020] Fig. 1 shows an example in which two buffer devices 54 are provided between the kneading and fluffing device 20 and the spraying device 10, but the number of installed buffer devices 54 is not limited to this. When the supply of the mixture to the spraying device 10 is stable, the buffer device 54 may not be provided.

[0021] As shown in Fig. 2, the buffer device 54 has a kneading section 55 that temporarily stores and kneads the mixture sent out from the kneading and fluffing device 20 through the supply hose 62, and a pressure-feeding section 56 that pressure-feeds the mixture sent out from the kneading section 55 to the spraying device 10 through the supply hose 66.

[0022] The pressurized water supply device 50 has a storage section 51 in which water is stored, and a pump section 52 that pressurizes and pressure-feeds the water in the storage section 51. The pressurized water pressurized by the pump section 52 is supplied to the spraying device 10 through the water supply hose 68.

[0023] [[ID=I5]]Similar to the kneading and fluffing device 20, the pressurized water supply device 50 is installed in the first floor or basement of the building C suitable for storing and supplying water, as shown in Fig. 1. Note that the pressurized water supply device 50 may be installed not inside the building C but in the site of the building C or in a work shed provided within the site of the building C, as shown by the dashed line in Fig. 1, or may be installed on the same floor as the floor where the spraying operation is performed

[0024] In addition, a traveling mechanism, for example, casters or a self-propelled cart (not shown) can be provided for the pressurized water supply device 50. Thereby, the pressurized water supply device 50 can be freely moved to an arbitrary position inside the building C and within the site of the building C together with the kneading and fluffing device 20.

[0025] The spraying device 10 is a nozzle with a known configuration used in the dry method, and has a spray hole from which the mixture is discharged and a spray hole from which the pressurized water is discharged. Note that the spraying device 10 may be a dedicated nozzle having a spray hole or the like specialized for discharging the mixture produced by the kneading and fluffing device 20.

[0026] The spraying device 10 is equipped with an operating unit (not shown) that can adjust the amount of the supplied mixture and pressurized water. By operating this operating unit and the discharge direction of the mixture and pressurized water by the worker S, the mixture and pressurized water discharged from each nozzle adhere to the surface of the object to be fire-resistant coated, forming a fire-resistant coating of a predetermined thickness. The spraying device 10 may also be operated by a robot that performs the spraying work automatically. In Figure 1, the mixture is supplied from one mixing and decontamination device 20 to one spraying device 10, but for example, by branching the supply hoses 64 and 66 downstream of the buffer device 54, the mixture may be supplied from one mixing and decontamination device 20 to multiple spraying devices 10.

[0027] Furthermore, the fire-resistant coating supply system 100 includes a control unit 70 that controls the operation of the aforementioned mixing and decontamination device 20, pressure feeding device 40, pressurized water supply device 50, and buffer device 54.

[0028] The control unit 70 consists of a microcomputer equipped with a CPU (Central Processing Unit), ROM (Read-Only Memory), RAM (Random Access Memory), and an I / O interface (Input / Output Interface).

[0029] The control unit 70 controls the control signals for starting and stopping kneading in the kneading and cotton dissolving device 20, as well as the rotational speed of the mixing and stirring mechanism 25, the conveying mechanism 30, and the rotary valve 35, which perform the kneading, as well as the control signals for starting and stopping the pumping in the pumping device 40, the flow rate of air sent from the pumping device 40, the control signals for starting and stopping the supply of pressurized water in the pressurized water supply device 50, and the pressure and flow rate of pressurized water supplied from the pressurized water supply device 50. Furthermore, if a buffer device 54 is provided, the control unit 70 similarly controls the control signals required for kneading and pumping in the buffer device 54.

[0030] The control unit 70 is not limited to controlling all devices 20, 40, 50, and 54, but may be provided for each device 20, 40, 50, and 54. Furthermore, the control of each device 20, 40, 50, and 54 may be performed manually by an operator.

[0031] Next, we will describe the spraying of fire-resistant coating material using the fire-resistant coating material supply system 100 with the above configuration.

[0032] First, rock wool, cement, and mineral oil are each fed into the mixing and deburring device 20. The rock wool, deburred in the crushing section 21, and the cement and mineral oil, mixed in the premixer section 23, are then mixed in the mixing section 24 for a predetermined time.

[0033] The mixture mixed in the kneading section 24 is then sent out from the dispensing section 34 at a predetermined dispensing speed and sequentially pumped towards the spraying device 10 by the pumping device 40.

[0034] When the pumping of the mixture produced in the kneading and cotton dissolving device 20 begins, pressurized water is supplied from the pressurized water supply device 50 towards the spraying device 10.

[0035] By supplying the mixture and pressurized water to the spraying device 10 in this manner, the device becomes ready to begin the spraying of the fire-resistant coating material.

[0036] Once the spraying operation begins, the mixing time in the mixing and decontamination device 20 is changed to ensure the particle size and density of the mixture are appropriate, depending on the adhesion of the fire-resistant coating material to the surface of the object to be coated. The pressure of the pressurized water is also changed as needed.

[0037] When the spraying operation is completed, the mixing and decomposing device 20 stops producing the mixture, and the mixture remaining in the supply hoses 62, 64, and 66 is pumped by the pumping device 40. The pumping device 40 is stopped when all of the mixture in the supply hoses 62, 64, and 66 has been sprayed onto the fire-resistant coating object via the spraying device 10. The pressurized water in the water supply hose 68 remains in the water supply hose 68 and is used for the next spraying operation.

[0038] As described above, with the fire-resistant coating material supply system 100, it is possible to carry out the work smoothly from the start to the end of the fire-resistant coating material spraying work without requiring any special preparation time or cleaning time.

[0039] Next, with reference to Figures 3 and 4, the specific configuration of the kneading and cotton-dissolving apparatus 20 according to this embodiment will be described. Figure 3 is a schematic diagram showing the overall configuration of the kneading and cotton-dissolving apparatus 20, and Figure 4 is a cross-sectional view showing a cross-section along line AA in Figure 3, illustrating the kneading state within the mixing and stirring mechanism 25, which will be described later.

[0040] As described above, the cotton mixing and decomposition device 20 includes a crushing section 21, a premixer section 23, a mixing section 24, and a dispensing section 34.

[0041] The crushing unit 21 is a thawing unit that supplies the thawed rock wool to the kneading unit 24, and includes a crushing blade 22a that cuts and crushes the mat-shaped rock wool, and a conveying unit 22b that conveys the rock wool inserted through the opening 21a toward the rotating crushing blade 22a.

[0042] The rock wool, crushed by the crushing blade 22a, descends by its own weight into the mixing section 24 through the outlet 21b which opens downwards. Although Figure 3 shows an example in which mat-shaped rock wool is inserted into the crushing section 21 from a nearly horizontal direction, the mat-shaped rock wool may also be fed into the crushing section 21 from above or from an oblique angle above.

[0043] The premixer unit 23 is a mixer unit having rotating agitating blades (not shown) that agitate and mix the cement and mineral oil introduced inside. The appropriately mixed cement and mineral oil are supplied to the rock wool in the crushing unit 21. The destination of the mixed cement and mineral oil is not limited to the rock wool in the crushing unit 21, but may also be rock wool before it is introduced into the crushing unit 21, or rock wool that is being agitated in the mixing and stirring mechanism 25 described later.

[0044] The mixing section 24 includes a mixing and stirring mechanism 25 that mixes crushed rock wool, cement, and mineral oil, and a conveying mechanism 30 located below the mixing and stirring mechanism 25 that conveys the mixture generated by the mixing and stirring mechanism 25 to the dispensing section 34.

[0045] The mixing and stirring mechanism 25 is a ribbon mixer having a rotating shaft 26 equipped with double ribbon blades 27a and 27b, and a case 25a that rotatably supports the rotating shaft 26. The rotating shaft 26 is rotated by an electric motor (not shown) to mix the rock wool, cement, and mineral oil supplied to the space 28 inside the case.

[0046] The ribbon blades 27a and 27b are mainly composed of a pair of inner blades 27a and a pair of outer blades 27b. The inner blades 27a, which are installed near the rotating shaft 26, press the powder closer to the rotating shaft 26 toward both sides of the case 25a along the rotating shaft 26, while the outer blades 27b, which are installed further away from the rotating shaft 26 than the inner blades 27a, press the powder closer to the inner circumferential surface of the case 25a toward the center of the case 25a along the rotating shaft 26.

[0047] In other words, as shown in Figure 4, in the internal space 28 of the mixing and stirring mechanism 25, a flow occurs radially outward at both sides of the case 25a, i.e., a flow away from the rotation axis 26, and a flow occurs radially inward at approximately the center of the case 25a, i.e., a flow approaching the rotation axis 26. Note that the ribbon blades 27a and 27b are not shown in Figure 4.

[0048] Since such a flow occurs in the case interior space 28, in order to mix the cement and mineral oil with the rock wool, for example, as shown in Figure 4, the cement and mineral oil mixed in the premixer section 23 may be introduced through an opening 25b located approximately in the center of the case 25a in the axial direction of the rotating shaft 26, and the mixed cement and mineral oil may be supplied along the flow of rock wool moving radially inward in the case interior space 28.

[0049] Furthermore, the case 25a of the mixing and stirring mechanism 25 is provided with a first opening 28a that opens upward and communicates with the outlet 21b of the crushing section 21, and a second opening 28b that opens downward and communicates with the upstream part of the conveying mechanism 30.

[0050] The second opening 28b is provided with a slide valve (not shown) that can change the opening area of ​​the second opening 28b. The slide valve operates to close the second opening 28b or minimize its opening area while mixing and stirring are taking place in the mixing and stirring mechanism 25, and to open the second opening 28b when mixing and stirring in the mixing and stirring mechanism 25 is completed.

[0051] Furthermore, a slide valve is not required at the second opening 28b, and the second opening 28b may be kept open at all times over a predetermined area. In this case, while mixing and stirring are being performed inside the mixing and stirring mechanism 25, the drive of the conveying mechanism 30 is stopped, or the operation of the conveying mechanism 30 is controlled so that the conveying direction of the conveying mechanism 30 is in the opposite direction, that is, the second opening 28b becomes the destination, in order to prevent the unmixed material from flowing out of the mixing and stirring mechanism 25 through the second opening 28b.

[0052] The mixture (rock wool, cement, and mineral oil) mixed and stirred within the mixing and stirring mechanism 25 descends by its own weight to the conveying mechanism 30 through the second opening 28b which opens at the bottom of the case 25a. In order to smoothly move the mixture toward the conveying mechanism 30, for example, the bottom surface of the case 25a may be inclined downward toward the second opening 28b.

[0053] Furthermore, in order to limit the supply of rock wool from the crushing section 21 to the mixing and stirring mechanism 25, a slide valve (not shown) that can change the opening area of ​​the first opening 28a may also be provided at the first opening 28a.

[0054] The conveying mechanism 30 consists of a screw conveyor 32 capable of conveying a mixture along the axial direction of a rotating shaft 31, which has a screw on its outer surface, and an extrusion blade 33 that pushes the mixture conveyed by the screw conveyor 32 radially outward. The screw conveyor 32 may be of a shaftless type.

[0055] The extrusion blade 33 is a blade provided on the outer circumferential surface of the rotating shaft 31 and is formed in a substantially U-shape when viewed from a direction perpendicular to the axial direction of the rotating shaft 31. Specifically, the extrusion blade 33 has a parallel portion 33a that extends substantially parallel to the axial direction of the rotating shaft 31 and a curved portion 33b that curves and extends toward the rotating shaft 31 from the end of the parallel portion 33a, with the curved portion 33b being provided downstream of the conveying mechanism 30 compared to the parallel portion 33a. As a result, the mixture conveyed by the screw conveyor 32 is pushed radially outward toward the rotary valve 35, which will be described later, without being mixed much by the extrusion blade 33.

[0056] The extrusion blade 33 may be formed in a roughly C-shape or a roughly U-shape. Furthermore, the rotating shaft on which the extrusion blade 33 is mounted may be a different rotating shaft from the rotating shaft 31 of the screw conveyor 32. In this case, the rotation of the extrusion blade 33 can be controlled independently of the screw conveyor 32.

[0057] The rotating shaft 31 is rotated by an electric motor (not shown), and the mixture that flows into the conveying mechanism 30 through the second opening 28b is conveyed by the screw conveyor 32 toward the extrusion blade 33 located downstream, and then sent by the extrusion blade 33 into the discharge section 34 connected to the downstream part of the conveying mechanism 30.

[0058] Since the conveying mechanism 30 is configured to convey the mixture with virtually no kneading, the mixing state of the mixture is mainly adjusted by changing the operating time of the mixing and stirring mechanism 25 described above.

[0059] Here, the longer the distance from the mixing and decomposing device 20 to the spraying device 10, the more the mixture is gradually crushed and granulated by frictional force between it and the inner walls of the supply hoses 62, 64, and 66, as well as by collisions with the inner walls. In particular, compared to the case where only rock wool is pumped, the mixture of rock wool, cement, and mineral oil has a higher specific gravity and is more likely to adhere to the inner walls of the supply hoses 62, 64, and 66, making it easier to granulate.

[0060] When the mixture becomes finely granulated in this way, more of the mixture must be discharged to form a coating of the required thickness on the surface of the object to be fire-resistant coated. As a result, rock wool and cement are consumed more than necessary, increasing material costs. Furthermore, when the mixture becomes finely granulated, the dust generated during spraying becomes finer, leading to a deterioration of the working environment.

[0061] Therefore, the time for operating the mixing and stirring mechanism 25, that is, the mixing time for mixing the rock wool, cement, and mineral oil, is set according to the distance from the mixing and decomposing device 20 to the spraying device 10, so that the particle size and density of the mixture when it reaches the spraying device 10 are of the optimal size. The longer the distance from the mixing and decomposing device 20 to the spraying device 10, the shorter the mixing time is set.

[0062] Furthermore, if a buffer device 54 is present between the kneading and cotton dissolving device 20 and the spraying device 10, the mixture will be granulated to some extent by the kneading section 55 of the buffer device 54. Therefore, the mixing time in the mixing and stirring mechanism 25 may be changed depending on whether or not the buffer device 54 is present.

[0063] The dispensing unit 34 is a known quantitative dispensing device that has a blow-through type rotary valve 35 having a rotor (not shown) which is rotationally driven by an electric motor (not shown), and is capable of dispensing a predetermined amount of the mixture conveyed by the conveying mechanism 30 through a volume chamber formed in the rotor. In other words, by controlling the rotation of the rotor of the rotary valve 35, it is possible to control the amount of mixture supplied and the stopping and starting of the supply.

[0064] The rotary valve 35 is connected to an air supply pipe 42 through which compressed air discharged from the pumping device 40 flows, and a pumping pipe 44 through which the mixture in the rotor's volume chamber flows along with the compressed air. As a result, the mixture sent out through the rotary valve 35 is pneumatically transported (pressurized) by the compressed air discharged from the pumping device 40.

[0065] The aforementioned supply hose 62 is connected to the pressure pipe 44, and the mixture produced by the kneading and deconutting device 20 is sequentially supplied to the spraying device 10 through the supply hoses 62, 64, and 66.

[0066] Each of the aforementioned units constituting the cotton mixing and decongesting device 20 is mounted on a trolley 36 equipped with casters 38 as a travel mechanism. This allows the cotton mixing and decongesting device 20 to be freely moved to any location within building C and on the premises of building C. The trolley 36 may be a self-propelled trolley. Although Figure 3 shows the pumping device 40 mounted on the trolley 36, the pumping device 40 may be installed in a location separate from the trolley 36.

[0067] According to the above embodiments, the following effects are achieved.

[0068] The aforementioned kneading and decomposing device 20 is configured to crush mat-shaped rock wool (fire-resistant cotton material), mix the crushed rock wool with cement (solidifying agent) and mineral oil to produce a mixture, and then discharge the produced mixture.

[0069] Thus, the mixing and decomposing device 20 installed inside or on the premises of building C is configured to sequentially generate a mixture and supply the generated mixture to the spraying device 10, which sprays fire-resistant coating material using a dry method, via supply hoses 62, 64, and 66.

[0070] In other words, since the mixture is produced sequentially as needed for spraying work by a mixing and decomposing device 20 installed inside or on the premises of building C, it is possible to produce the mixture at a lower cost compared to purchasing and using pre-mixed materials manufactured in advance at a factory, etc., and it is possible to suppress the increase in labor costs for spraying fire-resistant coatings even in high-rise buildings and large-scale buildings where relatively large amounts of fire-resistant coatings are required.

[0071] Furthermore, when using pre-mixed materials manufactured in advance at a factory, the mixing state of the mixture cannot be adjusted. However, the mixing state of the mixture produced by the kneading and decontamination device 20 can be arbitrarily and appropriately adjusted according to the requirements of the spraying device 10, that is, according to the adhesion status of the fire-resistant coating material. For example, the mixing time in the kneading and decontamination device 20 can be changed so that the particle size and density of the mixture reach the spraying device 10 at the optimal size.

[0072] Furthermore, by adjusting the mixing state of the mixture in the mixing and decontamination device 20 to improve the adhesion of the fire-resistant coating material, the generation of dust during spraying work is suppressed, and the working environment can be improved.

[0073] Furthermore, since the mixture is transported by compressed air, even if the mixing and decomposing device 20 and the spraying device 10 are relatively far apart, and the supply hoses 62, 64, and 66 connecting them are relatively long, the contents flowing through the supply hoses 62, 64, and 66 are powder (mixture) and air, so cleaning the inside of the supply hoses 62, 64, and 66 is virtually unnecessary. Compared to cases where cement slurry, which tends to harden, is supplied to the spraying device through the hose, as in semi-dry construction methods, this significantly improves maintainability before and after spraying work.

[0074] As described above, the mixing and decomposing device 20 can reduce the labor costs in the spraying of fire-resistant coatings using the dry method, and improve the work efficiency of the spraying process. Furthermore, it can improve the quality of the fire-resistant coatings and improve the working environment during the spraying process.

[0075] Furthermore, the following modifications are also within the scope of the present invention, and it is possible to combine the configurations shown in the modifications with the configurations described in the embodiments described above, or to combine the configurations described in the following different modifications.

[0076] In the above embodiment, a ribbon mixer is used as the mixing and stirring mechanism 25. The mixing and stirring mechanism 25 is not limited to a ribbon mixer, but can be any type of powder mixer capable of mixing rock wool, cement, and mineral oil to produce a mixture.

[0077] Furthermore, in the above embodiment, the conveying mechanism 30 is composed of a screw conveyor 32 and an extrusion blade 33. The configuration of the conveying mechanism 30 is not limited to this, and it may consist only of a screw conveyor, or any type of mechanism capable of conveying powder may be used.

[0078] Although embodiments of the present invention have been described above, these embodiments only represent a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments. [Explanation of Symbols]

[0079] 20. Mixing and de-cottoning device 10. Spraying device 21...Crushing section 22a... Crushing blade 23. Premixer section 24. Mixing section 25...Mixing stirring mechanism 30. Conveying mechanism 32. Screw conveyor 33... Extrusion blade 34. Sending section 38. Caster (driving mechanism) 100... Fire-resistant coating material supply system

Claims

1. A mixing and decontamination device that supplies a mixture of fire-resistant cotton material, a solidifying agent, and mineral oil to a spraying device that sprays fire-resistant coating material onto objects to be covered with fire-resistant coating material using a dry method within a building, A premixer section for pre-mixing the solidifying agent and the mineral oil, A crushing section having a crushing blade for cutting and crushing the mat-shaped fire-resistant cotton material, A kneading unit mixes the fire-resistant cotton material crushed by the crushing unit, the solidifying agent, and the mineral oil to produce the mixture, The system includes a dispensing unit that sends the mixture generated in the kneading unit to the spraying device, The solidifying agent and the mineral oil mixed in the premixer section are supplied to the fire-resistant cotton material in the crushing section and sent together with the fire-resistant cotton material to the kneading section. Cotton mixing and decomposition device.

2. A mixing and decontamination device that supplies a mixture of fire-resistant cotton material, a solidifying agent, and mineral oil to a spraying device that sprays fire-resistant coating material onto objects to be covered with fire-resistant coating material using a dry method within a building, A premixer section for pre-mixing the solidifying agent and the mineral oil, A crushing section having a crushing blade for cutting and crushing the mat-shaped fire-resistant cotton material, A kneading unit mixes the fire-resistant cotton material crushed by the crushing unit, the solidifying agent, and the mineral oil to produce the mixture, The system includes a dispensing unit that sends the mixture generated in the kneading unit to the spraying device, The solidifying agent and mineral oil mixed in the premixer section are supplied to the fire-resistant cotton material before being introduced into the crushing section, and together with the fire-resistant cotton material are sent to the kneading section via the crushing section. Cotton mixing and decomposition device.

3. A mixing and decontamination device that supplies a mixture of fire-resistant cotton material, a solidifying agent, and mineral oil to a spraying device that sprays fire-resistant coating material onto objects to be covered with fire-resistant coating material using a dry method within a building, A premixer section for pre-mixing the solidifying agent and the mineral oil, A crushing section having a crushing blade for cutting and crushing the mat-shaped fire-resistant cotton material, A kneading unit mixes the fire-resistant cotton material crushed by the crushing unit, the solidifying agent, and the mineral oil to produce the mixture, The system includes a dispensing unit that sends the mixture generated in the kneading unit to the spraying device, The kneading section has a ribbon mixer that mixes the crushed fire-resistant cotton material, the solidifying agent, and the mineral oil. The solidifying agent and mineral oil mixed in the premixer section are supplied to the fire-resistant cotton material being stirred within the ribbon mixer through an opening located approximately in the center in the axial direction of the rotation axis of the ribbon mixer. Cotton mixing and decomposition device.

4. The aforementioned kneading section is A mixing and stirring mechanism for mixing the crushed fire-resistant cotton material, the solidifying agent, and the mineral oil, A conveying mechanism is located below the mixing and stirring mechanism and conveys the mixture generated by the mixing and stirring mechanism to the dispensing section. The kneading and decomposing apparatus according to claim 1 or 2.

5. The mixing and stirring mechanism is a ribbon mixer, The conveying mechanism consists of a screw conveyor and an extrusion blade. The kneading and decomposing apparatus according to claim 4.

6. The vehicle further comprises a travel mechanism capable of moving within the building and within the building's premises. A kneading and de-coating apparatus according to any one of claims 1 to 3.

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