JP6484456B2 - Shielding agent and shielding device for target surface - Google Patents

Description

  The present invention relates to a light shielding agent and a light shielding device for a target surface that shields the target surface by coating the surface of the target such as a solar panel.

  In a general residential solar power generation system, a solar cell array (hereinafter, this solar cell array is referred to as a solar panel) composed of solar cell modules connected in series and parallel is installed on the roof of a house. ing. And the output from a solar panel is connected to the power conditioner via the relay terminal box, and it is comprised so that desired electric power may be obtained (for example, refer patent document 1).

JP 2013-110290 A

While the photovoltaic power generation system has become widespread, it has been regarded as a problem that a fire occurs due to the photovoltaic power generation system.
Even if a fire occurs from the solar panel, power generation is continued if sunlight is applied to the solar panel during sunshine. Even at night, power generation may be continued by irradiating the solar panel with a flame during a fire.

If water discharge for fire extinguishing is performed while the power generation by the solar panel is continued, there is a risk that a person or the like who is performing fire extinguishing activities by the electricity generated by the solar panel may receive an electric shock.
Therefore, in the event of a fire, development of a light shielding agent and a light shielding device capable of stopping power generation by simply shielding the solar panel from the outside has been desired.

  The present invention has been made to solve such a problem, and a light-blocking agent and a target surface that can quickly block light incident on the target surface by applying to the surface of the target object such as a solar panel. An object of the present invention is to provide a shading device.

In order to urgently shield the surface of the solar panel, for example, in the event of a fire, it may be possible to spray and apply a light-shielding agent to the surface of the solar panel.
However, since the surface of the solar panel is glass and is installed so as to be inclined along the inclined surface of the roof of the house, if the light-shielding agent is not viscous, it will flow down even if it is sprayed. .
On the other hand, when the light-shielding agent has a high viscosity, it is not easy to spray and spray.

In this way, as a shading agent that is applied by spraying onto a glassy and inclined surface such as the surface of a solar panel, the viscosity is low at the time of spraying, and the viscosity becomes high after application. Is required.
Therefore, the inventor has focused on a substance having a property (thixotropic property) in which the viscosity decreases and becomes liquid when subjected to shearing stress, and has considered to construct a light-shielding agent using such a substance.

  The present invention is based on such knowledge, and specifically comprises the following configuration.

(1) The light-shielding agent according to the present invention is a light-shielding agent used to shield light incident on the target surface by being sprayed and applied to the target surface. In addition, it is formed by dispersing debris made of silt in water and has thixotropic properties.

(2) Further, in the above (1), the swellable layered clay mineral is bentonite or smectite.

(3) Further, in the above-described (1) or (2), a light-shielding agent used for shielding light incident on the target surface by spraying and applying to the target surface. , Characterized in that a liquid thickener that increases the viscosity of water by mixing with acrylic polymer as the main component and water and disperse mainly debris consisting of silt in water It is.

(4) Moreover, in the thing in any one of said (1) thru | or (3), the said debris material grind | pulverizes clay roof tiles, It produces | generates so that an average particle diameter may correspond to silt, It is characterized by the above-mentioned. Is.

(5) Moreover, the thing in any one of said (1) thru | or (4) WHEREIN: The ratio of the said debris thing occupies 50%-70% among the said light shielding agents in weight ratio, It is characterized by the above-mentioned. To do.

(6) Moreover, the thing in any one of said (1) thru | or (5) WHEREIN: The said debris thing has the color of a black system | strain or a brown system | strain, It is characterized by the above-mentioned.

(7) A light-shielding device for a target surface according to the present invention includes a light-shielding agent housing portion that houses the light-shielding agent according to any one of the above (1) to (6), and a radiation nozzle at a tip thereof. A delivery path of the light shielding agent from the storage section to the radiation nozzle, a first on-off valve that opens and closes the delivery path, and a force that radiates from the radiation nozzle to the light shielding agent of the light shielding agent storage section Pressure adding means for applying a positive pressure or a negative force for controlling, and a control unit for controlling opening and closing of the first on-off valve.

  The light-shielding agent according to the present invention is a light-shielding agent used to shield light incident on the target surface by being sprayed and applied to the target surface, and is composed of a swellable layered clay mineral and mainly silt. It is composed of dispersed debris in water and has thixotropic properties, so it has a high viscosity in the storage state, but by applying pressure etc. to this and applying a shearing force, the viscosity decreased It becomes liquid and can be emitted and sprayed onto the surface of the target. And after apply | coating to the surface of a target object, since viscosity remains high and it stays on the target object surface without flowing down, the light-shielding effect can be maintained.

  In addition, since the debris is composed of relatively large particles mainly made of silt, when removing the light shielding agent from the surface of the target to which the light shielding agent is applied, the operation becomes easy.

It is explanatory drawing explaining the structure of the light-shielding apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing explaining the structure of the light-shielding apparatus which concerns on Embodiment 2 of this invention. It is explanatory drawing explaining the structure of the light-shielding apparatus which concerns on Embodiment 3 of this invention. It is explanatory drawing explaining the structure of the light-shielding apparatus which concerns on Embodiment 4 of this invention.

[Embodiment 1]
A light-shielding agent according to an embodiment of the present invention is a light-shielding agent used to shield light incident on a target surface by spraying and coating the target surface, and is a swellable layered clay mineral And debris mainly composed of silt is dispersed in water and has thixotropic properties.
Details will be described below.

<Target surface>
An example of the target surface is the surface of a solar panel.

<Swellable layered clay mineral>
Examples of the swellable layered clay mineral include smectite and bentonite.
Smectite and bentonite become thixotropic substances by dispersing in water.
“Thixotropy” is a property exhibited by an intermediate substance between a plastic solid such as a gel and a non-Newtonian liquid such as a sol, and the viscosity changes with time. Specifically, by applying a predetermined shearing force by stirring or shaking, the viscosity decreases and becomes liquid, while the viscosity decreases and the mixture is left for a certain period of time. , A characteristic in which the viscosity gradually increases and finally becomes solid.

  The reason why the light-shielding agent has thixotropy is that it can be applied by spraying onto an inclined glass surface, for example, as a solar panel, and does not flow down after application.

  In order to give viscosity so that it does not flow down, in the case of smectite, it is preferable to disperse it in water at a ratio of 1.5 wt% to 40 wt%. This is because if it is less than 1.5% by weight, the viscosity will be low and it will flow down when applied. On the other hand, if it exceeds 40% by weight, a large shearing force is required to make it liquid, so there is a problem that it becomes difficult to mix debris mainly composed of silt with water in which smectite is dispersed.

In the case of the light-shielding agent according to Embodiment 1, the smectite is preferably 6% by weight.
The appropriate concentration of smectite will be described later.

<Debris>
In the first embodiment, the debris is used to shield sunlight, and is composed of soil having an average particle size of silt. Here, silt is composed of particles having a diameter of 4 μm to 32 μm, and clay having a diameter smaller than silt is called clay, and sand having a diameter larger than silt is called sand.

  When a debris having a small average particle size is used, the light shielding performance of the light shielding agent is improved, but it becomes difficult to clean the light shielding agent applied to the target such as a solar panel. On the other hand, when a debris having a large average particle diameter is used, it becomes easy to clean the light shielding agent applied to the target such as a solar panel, but the light shielding performance of the light shielding agent is lowered. As a result of various experiments by the inventors, it was found that in the case of the light-shielding agent according to Embodiment 1, a debris having an average particle size of 5 to 10 μm is preferable.

  The debris used in Embodiment 1 is colored (excluding white), and the light shielding performance as a light shielding agent is improved. In particular, it is preferable that the debris has a black or brown color. Here, explanation will be given assuming that the debris has a brown color.

  Specifically, the debris used in the first embodiment is obtained by pulverizing clay roof tiles until they become silt, and becomes brown powder. The brown powder has an average particle size corresponding to silt, but some particles correspond to clay and few particles correspond to sand.

  The clay roof tile is generally made of kaolin, kibushi clay, glazed clay, silica, feldspar, dolomite, bone ash, sericite, and the like.

<Light shielding agent>
As described above, the light-shielding agent of the present embodiment is configured by dispersing swellable layered clay mineral and debris mainly composed of silt in water.

  When a relatively large amount of debris mainly composed of silt is dispersed in water, the thixotropy is excessively increased, resulting in an increase in pressure loss when the light shielding agent is emitted by the light shielding device described later. On the other hand, if a relatively small amount of debris mainly composed of silt is dispersed in water, the thixotropy is lowered, and the light shielding agent does not remain on the target surface. Therefore, as a result of experiments, the inventor determined that the dispersion obtained by dispersing smectite in water so that the weight of the light-shielding agent was 100% was 6% by weight, and the rest was mainly silt. It turned out that it would be good to use a crushed material consisting of That is, among the light shielding agents, debris accounts for 50% to 70%. Further, as a result of the inventors' experiment, it has been found that it is most preferable to add and disperse the debris 55 mainly composed of silt to the dispersed water 45 in which smectite is dispersed by weight ratio.

  As a dispersion method, for example, an aqueous solution of a swellable layered clay mineral is generated, and a debris mainly composed of silt is added to the aqueous solution and stirred. As a stirring method, for example, a mixer is used.

  Note that, by adding a gelling agent that is an organic compound to the light-shielding agent, the light-shielding agent can be gelled over time, so that the light-shielding agent can be more strongly fixed to the target. When the gelling agent is added, it is preferable to add the light shielding agent immediately before radiating from the radiation nozzle.

In the case of the light-shielding agent of the present embodiment as described above, the viscosity is high in the storage state, but by applying a pressure or the like to this and applying a shearing force, the liquid is reduced in viscosity. Since the light-shielding agent becomes liquid, radiation is possible and it can be applied to the surface of the target.
And after apply | coating to the surface of a target object, since viscosity remains high and it stays on the target object surface without flowing down, the light-shielding effect can be maintained.

  In addition, if the film thickness is too thin, the solar panel, which is the target with the light-shielding agent applied, generates power when the swellable layered clay mineral and debris mainly composed of silt are dispersed in water. If the film thickness is too thick, it will be difficult to remove the light-shielding agent applied to the target. As a result of the inventor's experiment, it was found that the average film thickness was preferably 0.5 mm to 1.5 mm on the target surface, and more preferably 1 mm to 1.5 mm.

  Since most of the light shielding agent of the present embodiment is moisture, it also has a fire extinguishing action. For example, it can be used as a light shielding agent and a fire extinguishing agent at a fire site.

  An experiment for confirming an appropriate concentration when smectite is used as the swellable layered clay mineral used for the light-shielding agent will be described.

  In the experiment, 0.1 ml of an aqueous solution of 1 to 3% by weight of smectite is dropped on tempered glass simulating a solar panel which is an example of the target, and the tempered glass is inclined at 80 degrees to move the droplet for 10 minutes. The amount was measured. The experimental results are shown in Table 1.

  As shown in Table 1, when the concentration was 1.0% by weight, the droplets flowed down and flowed down. At a concentration of 1.5% by weight, the droplet moved downward 6 cm. On the other hand, when the concentration was 2.0% by weight or more, the droplets remained at the dropping position without moving.

  From this fact, it is possible to make most of the light-shielding agent stay on the surface of the target by setting the concentration of smectite to 1.5% by weight or more, and in particular, by making it 2.0% by weight or more. It was confirmed that even when applied to the surface of the target, it did not flow down.

  As a constituent of the light-shielding agent, a swellable layered clay mineral such as smectite having thixotropy was used. It is also possible to use instead of the swellable layered clay mineral by adjusting.

  For example, if it is a liquid thickener (for example, Senka Corporation: Senka Act Gel AP200) that has an acrylic acid polymer as a main component and is mixed with water to increase the viscosity of water, What is necessary is just to make it mix by 3 weight%.

  However, when the light-shielding agent is composed of water, debris mainly composed of silt, or a thickener mainly composed of an acrylic acid-based polymer, depending on the concentration of the thickener, a swellable layered clay having thixotropic properties Compared to the case of using minerals, it may be difficult to adhere to the surface of the target so as to remain reliably.

  Therefore, an aqueous adhesive mainly composed of a synthetic resin emulsion (for example, Kurita Kogyo Co., Ltd .: Cricoat C-710) may be added to the light-shielding agent having the above structure. By adding this water-based adhesive, when the light-shielding agent mixed with the thickener mainly composed of an acrylic acid polymer is applied on the surface of the target, the light-shielding agent flows down from the surface of the target. Without being stuck to the surface of the target.

  Further, since the water-based adhesive has water retention and air permeability, the light-shielding agent applied on the target can be prevented from drying and cracking. Thereby, the state can be maintained while the power generation of the solar panel, which is an example of the target to which the light shielding agent is applied, is stopped.

  In addition, the aqueous adhesive may be added to a light-shielding agent constituted by dispersing a swellable layered clay mineral and debris mainly composed of silt in water. As a result, the light-shielding agent also has adhesiveness in addition to the thixotropy, so that the light-shielding agent can remain on the surface of the target.

<Configuration of light shielding device>
Next, a light-shielding device that can realize light-shielding a solar panel, which is an example of a target, using the above-described light-shielding agent will be described with reference to FIG.

As shown in FIG. 1, the light-shielding device 1 according to the present embodiment includes a light-shielding agent storage unit 3 that stores a light-shielding agent and a radiation nozzle 5 at the tip, and the light-shielding agent from the light-shielding agent storage unit 3 to the radiation nozzle 5. The radiation tube 7 that forms the delivery path of the gas, the first on-off valve 9 that is provided in the middle of the radiation pipe 7 to open and close the delivery path, and the force that radiates the light shielding agent stored in the light shielding agent storage unit 3 It is characterized by comprising a pressurizing means 11 for applying pressure for applying (hereinafter referred to as radiation force) and a control unit 13 for controlling opening and closing of the first on-off valve 9.
Hereinafter, each configuration will be described in detail.

<Light shielding agent storage>
The light-shielding agent storage unit 3 is made by dispersing a swellable layered clay mineral and a light-shielding pigment in water, and stores a light-shielding agent having a thixotropic property (the light-shielding agent described in Embodiment 1 or 2). When the light shielding device 1 is configured to be portable so that an operator can carry it, the light shielding agent storage unit 3 is, for example, like the backpack tank 17 described in the second embodiment. Also good.
Moreover, when the light-shielding device 1 is configured as an installation type, the light-shielding agent storage unit 3 may be, for example, a stationary storage tank.

<Radiation tube>
The radiation tube 7 is a member that communicates with the light shielding agent storage unit 3, has a radiation nozzle 5 at the tip, and forms a light shielding agent delivery path from the light shielding agent storage unit 3 to the radiation nozzle 5. The radiating tube 7 can be constituted by, for example, a flexible hose made of resin, for example, or can be constituted by a pipe made of metal having no flexibility.

<First on-off valve>
The first on-off valve 9 is a valve that is provided in the middle of the radiation tube 7 and opens and closes the light-shading agent delivery path.

<Pressurizing means>
The pressurizing means 11 applies a pressure for applying a radiation force to the light shielding agent in the light shielding agent storage unit 3 and is, for example, a nitrogen gas cylinder, a water supply pump, or an air compressor.

<Control unit>
The control unit 13 controls the opening / closing of the first opening / closing valve 9. The control unit 13 controls on / off of the pressurizing unit 11. The operation on the control unit 13 may be performed by an operator via, for example, a push button switch.

The operation of the light shielding device 1 configured as described above will be described.
When the operator operates the push button switch of the control unit 13, the first on-off valve 9 is opened by an instruction from the control unit 13, and the pressure serving as a radiation force is applied to the light shielding agent storage unit 3 by the pressurizing unit 11. Is done. When pressure is applied with the first on-off valve 9 being opened, the light shielding agent starts moving toward the radiation tube 7, and by this movement, a shearing force acts on the light shielding agent to lower the viscosity. Radiation is enabled by the reduced viscosity, and the light shielding agent is emitted from the radiation nozzle 5. The emitted light shielding agent adheres to a target, for example, a solar panel, and shields light incident on the solar panel. When the light-shielding agent attached to the surface of the solar panel is allowed to stand for a predetermined time, the viscosity gradually increases and finally becomes a solid state, and covers the surface of the solar panel and can stably shield light.

[Embodiment 2]
FIG. 2 is an explanatory diagram of a light shielding device 15 according to another embodiment of the light shielding device of the present invention, and the same parts as those in FIG. The light-shielding agent used here is the same as in the first embodiment.

  The light shielding device 15 according to the present embodiment is an example in which a back tank 17 is used as a light shielding agent storage unit and a nitrogen gas cylinder 19 filled with nitrogen is used as a pressurizing unit. A supply pipe 21 for supplying nitrogen gas from the nitrogen gas cylinder 19 is provided with a second on-off valve 23. The control unit 13 a performs opening / closing control of the first opening / closing valve 9 and the second opening / closing valve 23.

  In the present embodiment configured as described above, the control unit 13a supplies nitrogen gas to the backpack tank 17 by controlling the opening of the first on-off valve 9 and the second on-off valve 23. While making a shading agent liquid, a liquid shading agent can be radiated | emitted toward a solar panel, for example.

[Embodiment 3]
FIG. 3 is an explanatory diagram of a light shielding device 25 according to another embodiment of the light shielding device of the present invention, and the same parts as those in FIG. 1 or FIG. The light-shielding agent used here is the same as in the first embodiment.

  In the second embodiment, an embodiment has been described in which nitrogen gas is supplied from the nitrogen gas cylinder 19 as one that gives radiation to the light shielding agent stored in the shoulder tank 17 serving as the light shielding agent accommodating portion. In the shading device 25, as shown in FIG. 3, the shading agent is put in a flexible medicine bag 27, the medicine bag 27 is stored in a tank 29, and pressurized water is supplied by a water supply pump 31 as a pressurizing means. The liquid is supplied into the tank 29.

  In the light shielding device 25 of the present embodiment, the control unit 13 controls the water supply pump 31 to supply pressure water to the tank 29 via the supply pipe 21a and open the first on-off valve 9. The supply pipe 21 a supplies pressure water to the outside of the medicine bag 27 inside the tank 29. The inside of the medicine bag 27 communicates with the radiation tube 7, and the pressure water supplied to the tank 29 compresses the medicine bag 27 to make the light shielding agent in the medicine bag 27 liquefied and add radiation force. The light-shielding agent can be radiated to the solar panel which is the target via 5.

[Embodiment 4]
FIG. 4 is an explanatory view of a light shielding device 33 according to another embodiment of the light shielding device of the present invention, and the same parts as those in FIGS.
In the examples shown in the first to third embodiments, the example of radiating by applying a positive pressure to the light shielding agent accommodated in the light shielding agent accommodating portion has been shown, but the present invention is not limited to this.

  For example, as in the light shielding device 33 of the present embodiment shown in FIG. 4, a line proportioner 35 is provided in the middle of the radiation tube 7, and a light shielding agent stock solution (ie, a swellable layered state) is provided in the light shielding agent storage portion 3a. (Clay mineral and light-shielding pigment) are stored, and water is supplied from the water supply pump 31 to apply a negative pressure to the light-shielding agent stock solution to suck out the light-shielding agent stock solution to the radiation tube 7 side so that water and a predetermined concentration are obtained. You may make it radiate | mix as a light-shielding agent by mixing.

  As described in the first embodiment, when a gelling agent is added to the light-shielding agent, the gelling agent is stored in a storage unit different from the light-shielding agent storage unit 3 to emit the light-shielding agent. A gelling agent may be added to the light shielding agent immediately before. In this case, the gelling agent storage part and the light-shielding agent storage part 3 are connected by a pipe, a third on-off valve is provided in the pipe, and the control part 13 controls the opening / closing of the third on-off valve. .

  In addition, as a method of applying the light-shielding agent of the present embodiment to the surface of a target such as a solar panel, it may be radiated from the radiation nozzle by the light-shielding device as shown in the first to fourth embodiments. In addition, for example, it is conceivable that a light-shielding agent is sealed in a ball-shaped container that ruptures when it hits the target object, such as a crime prevention color ball, and projected toward the target object.

  In addition, in the case of adding an aqueous adhesive mainly composed of the synthetic resin emulsion described in Embodiment 1 (for example, Kurita Kogyo Co., Ltd .: Cricote C-710) to the light-shielding agent, the aqueous adhesive is previously mixed with the light-shielding agent. After that, it may be sprayed toward the solar panel, but it may be sprayed toward the target object (solar panel) prior to the light-shielding agent and adhered to the surface of the target object in advance. .

  When the light-shielding agent is composed of water, a debris mainly composed of silt, and a thickener mainly composed of an acrylic acid-based polymer, the viscosity increases when the thickener is mixed with water in advance, so that thixotropy is improved. Compared with the case of using the swellable layered clay mineral, it may be difficult to spray.

  Therefore, for example, a light shielding device having two radiating nozzles is used, two radiating nozzles are provided facing the target (solar panel), and one radiating nozzle is a mixture of water and debris mainly composed of silt. At the same time as the injection of the mixed liquid, a liquid thickener mainly composed of an acrylic acid polymer is injected from the other radiation nozzle.

  As a result, the mixture and the thickener collide and mix on the target (solar panel), the water thickens, and the light shielding agent does not flow down from the target (solar panel). A light-shielding agent can be easily applied on the surface of an object (solar panel).

    DESCRIPTION OF SYMBOLS 1 Light-shielding device, 3 and 3a Light-shielding agent accommodating part, 5 Radiation nozzle, 7 Radiation pipe, 9 1st on-off valve, 11 Pressurizing means, 13 and 13a Control part, 15 Light-shielding device, 17 Shoulder tank, 19 Nitrogen gas cylinder, 21 , 21a Supply pipe, 23 Second on-off valve, 25 Shading device, 27 Drug bag, 29 Tank, 31 Water supply pump, 33 Shading device, 35 Line proportioner.

Claims (2)

A light blocking agent used to block light incident on the solar panel surface by coating by spraying the solar panel surface,
The swellable layered clay mineral and the clay tiles are crushed and the debris produced so that the average particle size corresponds to silt is dispersed in water.
An average particle size of the crushed material is 5 to 10 μm,
The proportion of the debris accounts for 50% to 70% of the light shielding agent in the weight ratio,
A light-shielding agent characterized by having thixotropy. The detritus includes light shielding agent of claim 1 Symbol mounting, characterized in that it has a color of black line or brown line.