Fire-resistant coating supply system

Abstract

To improve work efficiency in the spraying of fire-resistant coatings. [Solution] The fire-resistant coating supply system 100 includes a mixture manufacturing device 20 that mixes fire-resistant cotton material, a solidifying agent and mineral oil to produce a mixture, a pumping device 30 that pumps the mixture from the mixture manufacturing device 20 to the spraying device 10, and a pressurized water supply device 40 that supplies pressurized water to the spraying device 10.

Description

Technical Field

[0001] The present invention relates to a refractory coating material supply system.

Background Art

[0002] Patent Document 1 discloses a system in which cement slurry and rock wool are mixed immediately before spraying a refractory coating material onto an object to be coated with refractory.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the semi-dry method using cement slurry 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 inside 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 in which a premix material in which rock wool and cement are pre-mixed and water are mixed 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 improve the workability in the spraying operation of the refractory coating material and reduce the working cost.

Means for Solving the Problems

[0006] The present invention relates to a fire-resistant coating supply system for supplying fire-resistant coating material to a spraying device that sprays fire-resistant coating material onto objects to be covered with fire-resistant coating material within a building, comprising: a mixture manufacturing device that mixes fire-resistant cotton material, a solidifying agent, and mineral oil to produce a mixture; a pumping device that pressurizes the mixture from the mixture manufacturing device to the spraying device; and a pressurized water supply device that supplies pressurized water to the spraying device. The mixture manufacturing apparatus has a premixer section that premixes a solidifying agent and mineral oil, and is configured to produce a mixture by mixing the solidifying agent and mineral oil mixed in the premixer section with fire-resistant cotton material. The present invention also relates to a fire-resistant coating material supply system that supplies fire-resistant coating material to a spraying device that sprays fire-resistant coating material onto objects to be covered with fire-resistant coating material inside a building, comprising: a mixture manufacturing apparatus that produces a mixture by mixing fire-resistant cotton material, a solidifying agent and mineral oil; a pumping device that pumps the mixture from the mixture manufacturing apparatus to the spraying device; a pressurized water supply device that supplies pressurized water to the spraying device; and a buffer device capable of storing the mixture pumped by the pumping device, wherein the buffer device has a pumping section that pumps the mixture. Furthermore, the present invention relates to a fire-resistant coating supply system for supplying fire-resistant coating material to a spraying device that sprays fire-resistant coating material onto an object to be covered with fire-resistant coating material within a building, comprising: a mixture manufacturing device that mixes fire-resistant cotton material, a solidifying agent, and mineral oil to produce a mixture; a pumping device that pressurizes the mixture from the mixture manufacturing device to the spraying device; and a pressurized water supply device that supplies pressurized water to the spraying device, wherein the mixing time for mixing the fire-resistant cotton material, solidifying agent, and mineral oil in the mixture manufacturing device is shortened as the distance from the mixture manufacturing device to the spraying device increases. [Effects of the Invention]

[0007] According to the present invention, it is possible to improve work efficiency and reduce work costs in the spraying of fire-resistant coating materials. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing an example of the work performed using the fire-resistant coating material supply system 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 according to an embodiment of the present invention. [Figure 3] This graph illustrates the mixing time in a mixture manufacturing apparatus. [Modes for carrying out the invention]

[0009] Hereinafter, a fire-resistant coating material supply system according to an embodiment of the present invention will be described with reference to the drawings.

[0010] First, with reference to Figures 1 and 2, a fire-resistant coating material supply system 100 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.

[0011] 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.

[0012] 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.

[0013] The fire-resistant coating supply system 100 is a system comprising a mixture manufacturing device 20 that mixes rock wool as a fire-resistant material with cement and mineral oil as solidifying agents to produce a mixture, a pumping device 30 that pumps the mixture from the mixture manufacturing device 20 to the spraying device 10, and a pressurized water supply device 40 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 the pressurized water are supplied separately to the spraying device 10.

[0014] The mixture manufacturing apparatus 20 includes a mixing section 21 for thawing rock wool and mixing it with cement and mineral oil, and a premixer section 22 for pre-mixing the cement and mineral oil before it is introduced into the mixing section 21. While it is also possible to omit the premixer section 22 and directly introduce the cement and mineral oil into the mixing section 21 together with the rock wool, it is preferable to pre-mix the cement with mineral oil to facilitate the mixing of dry cement with dry rock wool.

[0015] As shown in Figure 1, the mixture manufacturing apparatus 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 mixture manufacturing apparatus 20 may be installed not inside building C, but on the premises of building C or in a workshop located on the premises, as indicated by the dashed line in Figure 1.

[0016] In addition, the mixture manufacturing apparatus 20 can be provided with a traveling mechanism (not shown), such as casters or a self-propelled carriage. Thereby, the mixture manufacturing apparatus 20 can be freely moved to any position within the building C and within the site of the building C.

[0017] The rock wool, cement, and mineral oil introduced into the kneading section 21 of the mixture manufacturing apparatus 20 are kneaded in the kneading section 21 for a predetermined time set in advance, and then sent out as a mixture to the pressure feeding device 30.

[0018] The pressure feeding device 30 is an air blower integrally configured with the mixture manufacturing apparatus 20, and pressures the mixture sent out from the mixture manufacturing apparatus 20 to the spraying device 10 through the supply hoses 62, 64, and 66. Note that the supply hoses 62, 64, and 66 may be made of transparent vinyl hoses so that the state of the mixture moving inside can be confirmed. Further, the pressure feeding device 30 may be configured separately from the mixture manufacturing apparatus 20.

[0019] When the supply hoses 62, 64, and 66 become long or when the position of the spraying device 10 is on an upper floor of the building C, a buffer device 50 capable of temporarily storing the mixture is provided at a location where the supply hoses 62, 64, and 66 are connected.

[0020] FIG. 1 shows an example in which two buffer devices 50 are provided between the mixture manufacturing apparatus 20 and the spraying device 10, but the number of installed buffer devices 50 is not limited to this. Note that 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 50 has a kneading section 51 that temporarily stores and kneads the mixture pressure-fed from the pressure feeding device 30 through the supply hose 62, and a pressure feeding section 52 that pressure-feeds the mixture sent out from the kneading section 51 to the spraying device 10 through the supply hose 66.

[0022] The pressurized water supply device 40 has a storage section 41 in which water is stored, and a pump section 42 that pressurizes and pumps the water in the storage section 41. The pressurized water pressurized by the pump section 42 is supplied to the spraying device 10 through a water supply hose 68.

[0023] Similar to the mixture manufacturing device 20, the pressurized water supply device 40 is installed in the first - floor section or basement of the building C suitable for storing and supplying water, as shown in FIG. 1. Note that the pressurized water supply device 40 may be installed not inside the building C, but within the site of the building C or in a work shed provided within the site, 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 being performed.

[0024] Also, similar to the mixture manufacturing device 20, the pressurized water supply device 40 can be provided with a traveling mechanism (not shown), such as casters or a self - propelled trolley. Thereby, the pressurized water supply device 40 can be freely moved together with the mixture manufacturing device 20 to any position within the building C and within the site of the building C.

[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 manufactured by the mixture manufacturing device 20.

[0026] The spraying device 10 is provided with an operation section (not shown) capable of adjusting the amounts of the supplied mixture and pressurized water. By operating the operation section and the discharge directions of the mixture and the pressurized water by the worker S, the mixture and the pressurized water discharged from each spray hole adhere to the surface of the refractory coating target object, and a refractory coating material with a predetermined thickness is formed. Note that the spraying device 10 may be operated by a robot that automatically performs the spraying operation. Also, in FIG. 1, the mixture is supplied from one mixture manufacturing device 20 to one spraying device 10. However, for example, by branching the supply hoses 64 and 66 on the downstream side of the buffer device 50, the mixture may be supplied from one mixture manufacturing device 20 to a plurality of spraying devices 10.

[0027] Furthermore, the fire-resistant coating supply system 100 includes a control unit 70 that controls the operation of the aforementioned mixture manufacturing apparatus 20, pressure feeding apparatus 30, pressurized water supply apparatus 40, and buffer apparatus 50.

[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 mixture manufacturing apparatus 20, the rotational speed of the rotating mechanism (not shown) that performs kneading, and the control signals for starting and stopping pumping in the pumping apparatus 30, the flow rate of air sent from the pumping apparatus 30, the control signals for starting and stopping pressurized water supply in the pressurized water supply apparatus 40, and the pressure and flow rate of pressurized water supplied from the pressurized water supply apparatus 40. If a buffer apparatus 50 is provided, the control unit 70 similarly controls the control signals required for kneading and pumping in the buffer apparatus 50.

[0030] Furthermore, as shown in the graph in Figure 3, for example, the control unit 70 changes the mixing time for mixing rock wool, cement, and mineral oil in the mixture manufacturing apparatus 20 according to the distance from the mixture manufacturing apparatus 20 to the spraying apparatus 10.

[0031] Here, the longer the distance from the mixture manufacturing 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.

[0032] 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.

[0033] Therefore, in this embodiment, the longer the distance from the mixture manufacturing device 20 to the spraying device 10, the shorter the mixing time in the mixture manufacturing device 20, so that the particle size and density of the mixture when it reaches the spraying device 10 are optimal.

[0034] Furthermore, if a buffer device 50 is present between the mixture manufacturing device 20 and the spraying device 10, the mixture will be granulated to some extent by the kneading section 51 of the buffer device 50. Therefore, the mixing time in the mixture manufacturing device 20 may be changed depending on whether or not the buffer device 50 is present.

[0035] Furthermore, the mixing time in the mixture manufacturing apparatus 20 may be changed linearly with respect to distance, as shown by the solid line in the graph of Figure 3, or it may be changed curvilinearly with respect to distance, as shown by the dashed and dotted lines in the graph of Figure 3. The relational expression R, which shows the relationship between the mixing time in the mixture manufacturing apparatus 20 and the distance from the mixture manufacturing apparatus 20 to the spraying apparatus 10, is stored in the control unit 70 in advance. Alternatively, a standard mixing time may be set in advance according to the weight or volume of the mixture to be mixed in the mixture manufacturing apparatus 20, and the mixing time to be increased or decreased from this standard mixing time may be determined from the relational expression R.

[0036] The control unit 70 is not limited to controlling all of the devices 20, 30, 40, and 50, but may be provided for each of the devices 20, 30, 40, and 50. Furthermore, the control of each device 20, 30, 40, and 50 may be performed manually by an operator.

[0037] Next, we will describe the spraying of fire-resistant coating material using the fire-resistant coating material supply system 100 with the above configuration.

[0038] First, rock wool, cement, and mineral oil are each put into the mixture manufacturing apparatus 20, and the thawed rock wool, along with the cement and mineral oil mixed in the premixer section 22, are mixed in the kneading section 21 for a predetermined time.

[0039] The mixture prepared in the mixture preparation device 20 is then sent to the pumping device 30 at a predetermined feed rate and sequentially pumped towards the spraying device 10 by the pumping device 30.

[0040] When the pumping of the mixture by the pumping device 30 begins, pressurized water is supplied from the pressurized water supply device 40 towards the spraying device 10.

[0041] 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.

[0042] Once the spraying operation begins, the mixing time in the mixture manufacturing 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.

[0043] When the spraying operation is completed, the mixing device 20 stops producing the mixture, and the mixture remaining in the supply hoses 62, 64, and 66 is pumped by the pumping device 30. The pumping device 30 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.

[0044] 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.

[0045] According to the above embodiments, the following effects are achieved.

[0046] According to the fire-resistant coating material supply system 100 described above, the mixture produced by the mixture manufacturing device 20 by mixing rock wool (fire-resistant cotton material), cement (solidifying agent), and mineral oil is supplied via the pressure feed device 30 to the spraying device 10 that sprays the fire-resistant coating material onto the building C. Separately, pressurized water that forms the fire-resistant coating material together with the mixture is supplied to the spraying device from the pressurized water supply device 40.

[0047] Thus, since the mixture is manufactured sequentially as needed for spraying work by a mixture manufacturing device 20 installed inside or on the premises of building C, it is possible to manufacture the mixture at a lower cost compared to purchasing and using pre-mixed materials manufactured in advance at a factory, etc. This makes it 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.

[0048] 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 mixture manufacturing 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 mixture manufacturing device 20 can be changed so that the particle size and density of the mixture reach the spraying device 10 are of the optimal size.

[0049] Furthermore, by adjusting the mixing state of the mixture in the mixture manufacturing apparatus 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.

[0050] Furthermore, in the fire-resistant coating material supply system 100 described above, the mixture, which is a powder containing cement, and water are supplied separately to the spraying device 10. Therefore, even if the mixture manufacturing device 20 and the spraying device 10 are relatively far apart, and the hoses 62, 64, 66, and 68 connecting them are relatively long, the substances flowing inside these hoses 62, 64, 66, and 68 are either powder or water, so cleaning inside the hoses 62, 64, 66, and 68 is virtually unnecessary. Compared to cases where a cement slurry that tends to harden, as in semi-dry construction methods, is supplied to the spraying device through the hoses, maintenance before and after spraying work can be greatly improved.

[0051] Thus, the fire-resistant coating supply system 100 can improve work efficiency and reduce operating costs in the spraying of fire-resistant coatings. Furthermore, it can improve the quality of the fire-resistant coatings and enhance the working environment during the spraying process.

[0052] 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.

[0053] In the above embodiment, the mixing time in the mixture manufacturing device 20 is changed so that the particle size and density of the mixture when it reaches the spraying device 10 are optimal. Alternatively, or in addition to this, the mixing ratio (weight ratio) of rock wool, cement, and mineral oil may be appropriately changed within a specified range in order to achieve the optimal particle size and density of the mixture when it reaches the spraying device 10.

[0054] 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]

[0055] 100... Fire-resistant coating material supply system 10. Spraying device 20...Mixture manufacturing equipment 21. Mixing section 22. Premixer section 30. Pressure feeding device 40. Pressurized water supply device 41. Storage section 42... Pump section 50. Buffer device 51... Mixing section 52. Pumping section 70... Control Unit

Claims

1. A fire-resistant coating material supply system that supplies the fire-resistant coating material to a spraying device that sprays the fire-resistant coating material onto objects to be covered with fire-resistant coating inside a building, A mixture manufacturing apparatus for producing a mixture by mixing fire-resistant cotton material, a solidifying agent, and mineral oil, A pumping device for pumping the mixture from the mixture manufacturing apparatus to the spraying apparatus, The system includes a pressurized water supply device that supplies pressurized water to the spraying device, The mixture manufacturing apparatus has a premixer section for pre-mixing the solidifying agent and the mineral oil, and is configured to produce the mixture by mixing the solidifying agent and the mineral oil mixed in the premixer section with the fire-resistant cotton material. Fire-resistant coating material supply system.

2. A fire-resistant coating material supply system that supplies the fire-resistant coating material to a spraying device that sprays the fire-resistant coating material onto objects to be covered with fire-resistant coating inside a building, A mixture manufacturing apparatus for producing a mixture by mixing fire-resistant cotton material, a solidifying agent, and mineral oil, A pumping device for pumping the mixture from the mixture manufacturing apparatus to the spraying apparatus, A pressurized water supply device that supplies pressurized water to the spraying device, The system includes a buffer device capable of storing the mixture pumped by the pumping device, The buffer device has a pumping section for pumping the mixture, Fire-resistant coating material supply system.

3. A fire-resistant coating material supply system that supplies the fire-resistant coating material to a spraying device that sprays the fire-resistant coating material onto objects to be covered with fire-resistant coating inside a building, A mixture manufacturing apparatus for producing a mixture by mixing fire-resistant cotton material, a solidifying agent, and mineral oil, A pumping device for pumping the mixture from the mixture manufacturing apparatus to the spraying apparatus, The system includes a pressurized water supply device that supplies pressurized water to the spraying device, In the aforementioned mixture manufacturing apparatus, the mixing time for mixing the fire-resistant cotton material, the solidifying agent, and the mineral oil is shortened as the distance from the mixture manufacturing apparatus to the spraying apparatus increases. Fire-resistant coating material supply system.

4. The mixture manufacturing apparatus has a premixer section that premixes the solidifying agent and the mineral oil. The fire-resistant coating material supply system according to claim 2 or 3.

5. The system further comprises a buffer device capable of storing the mixture pumped by the pumping device. A fire-resistant coating material supply system according to claim 1 or 3.

6. In the aforementioned mixture manufacturing apparatus, the mixing time for mixing the fire-resistant cotton material, the solidifying agent, and the mineral oil is shortened as the distance from the mixture manufacturing apparatus to the spraying apparatus increases. A fire-resistant coating material supply system according to claim 1 or 2.

7. The mixture manufacturing apparatus has a travel mechanism that allows it to move within the building and on the building's premises. A fire-resistant coating material supply system according to any one of claims 1 to 3.

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