Functional sprinkler head for micro water leakage detection

Abstract

The present invention relates to a sprinkler head having a micro-leak detection function, and to a method for detecting micro-leak of a sprinkler head, and more particularly, to a method for detecting micro-leak of a sprinkler head, in which an administrator can confirm in advance a leak phenomenon caused by erroneous construction of a sprinkler head installed in a building or a factory in order to hold down a fire, or a defect or corrosion of the sprinkler head itself with the naked eye. Therefore, technical accidents and quality accidents caused by leakage are prevented in advance.

Description

Technical Field

[0001] The present invention relates to a sprinkler head with micro-leakage detection function, and specifically to a sprinkler head that allows an administrator to visually confirm in advance leakage caused by incorrect construction, defects or corrosion of sprinkler heads installed in buildings or factories to suppress fire, thereby preventing technical accidents and quality accidents caused by leakage in advance. Background Art

[0002] Generally, sprinkler equipment is installed inside buildings or factories to suppress fires at an early stage. Nowadays, the market is changing rapidly for factory facilities, and leakage accidents caused by building changes and aging sprinkler heads have led to frequent technical and quality accidents. For semiconductor factories, leakage from sprinkler heads causes equipment failures and contamination of produced wafers every year, resulting in losses of more than hundreds of millions of won.

[0003] Specifically, the company that constructs and manages the sprinkler heads has dozens of people to carry out maintenance and inspection in order to confirm whether there is leakage in advance. The inspection period required is at least 3 months, which consumes a lot of time and money.

[0004] In addition, most sprinkler heads are installed on the ceilings of buildings or factories. In high-altitude areas (equivalent to dangerous operations), they need to be checked one by one through bubble inspection or using a leak tester. Therefore, the workers who implement this construction are often exposed to safety accidents. Summary of the invention

[0005] Problems to be solved by the invention

[0006] The present invention is proposed to solve the aforementioned problems. One embodiment of the present invention provides a sprinkler head with micro-leakage detection functionality.

[0007] Furthermore, its purpose is to confirm leakage caused by incorrect construction of sprinkler heads, defects in the sprinkler heads themselves or corrosion. The administrator can use sprinkler heads with water-changing paint on the end of the sprinkler heads (splash plate) to visually confirm the location of the leakage and then deal with it, without having to put dozens of people into high-altitude operations.

[0008] Another object of the present invention is to minimize safety accidents and technical accidents by utilizing the product and method thereof.

[0009] The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and a person skilled in the art in the technical field to which the present invention belongs can clearly understand another technical problem not mentioned from the following description.

[0010] Solutions for solving problems

[0011] As a technical means for achieving the aforementioned technical problems, one aspect of the present invention provides a functional sprinkler head for detecting micro-leakage, characterized in that it includes: a bracket; a valve cover; a glass ball; and a splash plate, and also includes: a water-changing paint layer, which is applied to the surface of the lower end or upper end of the above-mentioned splash plate, and when the above-mentioned water-changing paint layer has micro-leakage, the micro-leakage undergoes partial color change.

[0012] The present invention is characterized in that the water-variable coating layer can be applied in a manner having a thickness of 10 to 50 μm, and the coating can be performed by any one selected from a wet method, a dry method, and a spray spray method.

[0013] The present invention is characterized in that, relative to 100 weight % of the above water-variable coating, it may include: 3 to 10 weight % of dye; 5 to 10 weight % of pigment; 10 to 25 weight % of synthetic resin; and the remainder of solvent.

[0014] The present invention is characterized in that the water-variable paint may contain 30 to 50 weight % of solid matter relative to 100 weight % of the water-variable paint.

[0015] The present invention is characterized in that the pH value of the water-variable coating can range from 4 to 7.

[0016] The present invention is characterized in that the dye can be a pH indicator or a redox indicator, which can be any one of bromophenol blue (BPB), bromo cresol green (BCG), indigo carmine (IC) and cresol red (CR).

[0017] The present invention is characterized in that the above-mentioned pigment as an inorganic pigment can be selected from one of titanium dioxide, silicon dioxide, calcium carbonate, calcium oxide, calcium hydroxide, zeolite, activated carbon, bentonite and aluminum silicate.

[0018] The present invention is characterized in that the synthetic resin may be at least one selected from the group consisting of alkyd, acrylic polymer, polyester, phenol, melamine, polyurethane, silicon and ester.

[0019] The present invention is characterized in that the additive may be one or more selected from an accelerating agent, an adhesion enhancing agent, a dispersant and a mixture thereof.

[0020] The present invention is characterized in that the solvent may be one or more selected from water, alcohol, ester, ketone, ether and a mixture thereof.

[0021] Another aspect of the present invention provides a method for detecting micro-leakage of a sprinkler head, wherein the sprinkler head comprises a bracket, a valve cover, a glass ball, and a splash plate, and the method comprises: a step of applying a water-variable coating to the lower end or the upper end of the splash plate; when micro-leakage occurs at the site where the water-variable coating is applied, a step of detecting leakage based on the color change of the part where the micro-leakage occurs, wherein the water-variable coating comprises dyes, pigments, synthetic resins, additives and solvents.

[0022] After the step of coating the lower end portion or the upper end portion of the deflector with the water-variable coating, the method may further include performing drying by heat treatment at a temperature of 120 to 180° C. for 10 to 30 minutes.

[0023] The present invention is characterized in that, in the step of applying the water-variable paint, the water-variable paint is applied multiple times.

[0024] Effects of the Invention

[0025] According to an embodiment of the present invention, by applying water-changing paint to the fastening parts and welding parts of the sprinkler head, the construction and management company can effectively confirm whether there is leakage and achieve cost savings. Facility inspectors do not need to perform high-altitude operations for leak detection, thereby preventing safety accidents.

[0026] Moreover, at the moment of a slight water leak, the color change of the splash plate at the end of the sprinkler head allows the replacement time of the sprinkler head to be directly detected with the naked eye. Inspectors can also directly detect defects in the sprinkler head, corrosion caused by aging, and related contents of incorrect construction with the naked eye.

[0027] Furthermore, after the discoloration reaction caused by leakage, the color returns to the original color, so it can be reused.

[0028] The effects of the present invention are not limited to the above-mentioned effects, and should be understood to include all effects that can be inferred from the structure of the invention described in the description of the present invention or the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. 1 is a schematic diagram showing a leakage detection system for detecting micro-leakage of a sprinkler according to an embodiment of the present invention.

[0030] Figure 2 The performance evaluation results of the water splash plate of a sprinkler head coated with a water-variable paint according to an embodiment of the present invention when leaking.

[0031] Figure 3 The results of evaluating the reactivity of the water-variable coating after the dye is changed according to one embodiment of the present invention.

[0032] Figure 41 is a comparison result of the conditions and reactivity of a single coating and a double coating of a water-variable coating according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be described in more detail below. However, the present invention can be implemented in many different ways, and the present invention is not limited to the embodiments described herein, but is defined only according to the appended claims.

[0034] In addition, the terms used in the present invention are only used to illustrate specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless clearly different in context. The present invention "includes" certain structural elements throughout the specification, which means that other structural elements may also be included, rather than excluding other structural elements, unless there is a special record to the contrary.

[0035] Throughout the specification, when certain parts are "connected (connected, in contact with, combined)" with other parts, this includes not only the case of "direct connection" but also the case of "indirect connection" with other parts in between. Furthermore, when certain parts "include" certain structural elements, unless there is a special record to the contrary, it means that other structural elements may also be included, rather than excluding other structural elements.

[0036] The terms used in this specification are only used to describe specific embodiments and are not intended to limit the present invention. A singular expression includes a plural expression unless the context clearly states otherwise.

[0037] The first aspect of the present application provides a functional sprinkler head with micro-leakage detection function, characterized in that it includes: a bracket; a valve cover; a glass ball; and a splash plate, and also includes: a water-changing paint layer, which is applied to the lower end or upper end surface of the above-mentioned splash plate, and when the above-mentioned water-changing paint layer has micro-leakage, the micro-leakage undergoes partial color change.

[0038] Hereinafter, a sprinkler head with micro water leakage detection functionality according to the first aspect of the present application will be described in detail.

[0039] In one embodiment of the present application, it is characterized in that the water-variable coating layer is applied in a manner having a thickness of 10 to 50 μm, and the coating can be applied according to any one of a wet method, a dry method, and a spray spray method. When the above range is exceeded, the coating becomes too thick or too thin, resulting in a decrease in the efficiency of micro-leakage detection. If the thickness reaches more than 50 μm, the water reaction time is extended to more than 30 minutes, resulting in a problem of reduced efficiency of micro-leakage detection.

[0040] In one example of the present application, relative to 100 weight % of the above water-variable coating, it may include: 3 to 10 weight % of dye; 5 to 10 weight % of pigment; 10 to 25 weight % of synthetic resin; and the rest of solvent. And it may include 2 to 5 weight % of additives. Preferably, it may include: 4.0 to 5.0 weight % of dye, 7.0 to 8.0 weight % of pigment, 20 to 25 weight % of synthetic resin, 3 to 5 weight % of additives and the rest of solvent (about 60 to 70 weight %).

[0041] In an example of the present application, the water-variable coating may include 30 to 50 weight % of solids relative to 100 weight % of the water-variable coating.

[0042] In one example of the present application, the deflector as the coating object can be classified into non-gold-plated, STS gold-plated, and brass substrates, and can be treated with a primer to enhance adhesion.

[0043] In one example of the present application, it is characterized in that after the coating, drying can be performed by heat treatment at a temperature of 120 to 180° C. for 10 to 30 minutes.

[0044] Figure 1 The schematic diagram of a sprinkler head leakage detection system using water-changing paint according to an embodiment of the present invention is shown. If moisture is detected on the portion coated with the water-changing paint, the color will change. Figure 1 When a product coated with water-variable paint (S10) on a splash plate forming a water spray pattern of a sprinkler head is installed in a building or factory, if an incorrect construction method occurs or the sprinkler head itself has defects, water (H2O) is concentrated in the direction of gravity and gathered on the splash plate coated with water-variable paint (S11), and a chemical reaction occurs with the water (water induces an oxidation reaction of the dye constituting the paint, thereby causing the splash plate to change color.), resulting in the splash plate changing color (S12).

[0045] Furthermore, a normal sprinkler head may leak water over a long period of time due to aging or corrosion of the sprinkler head, which may chemically react with the water and cause the splash plate to change color (S12). Therefore, the administrator can visually confirm the time to replace the sprinkler head at this time.

[0046] In the process of applying water-variable coatings, in order to improve reversibility and drying degree, a method of mixing additional solvents can be used.

[0047] In one example of the present application, it is characterized in that the water-variable paint may include 30 to 50 weight % of solid matter relative to 100 weight % of the water-variable paint.

[0048] In one embodiment of the present application, the pH of the water-variable paint may be in the range of 4 to 7. When the pH exceeds the above pH range, the solids in the water-variable paint cannot maintain an optimal weight ratio, thereby reducing the leakage detection performance.

[0049] In one example of the present application, it is characterized in that the dye can be a pH indicator or a redox indicator, and the pH indicator can be any one of bromophenol blue (BPB), bromocresol green (BCG), indigo carmine (IC) and cresol red (CR), preferably, indigo carmine (IC) can be used. In one example of the present application, it is characterized in that the pigment can be an inorganic pigment, and one of titanium dioxide, silicon dioxide, calcium carbonate, calcium oxide, calcium hydroxide, zeolite, activated carbon, bentonite and aluminum silicate can be selected, and titanium dioxide can be used preferably.

[0050] In one example of the present application, it is characterized in that the synthetic resin can be one or more selected from the group consisting of alkyd, acrylic polymer, polyester, phenol, melamine, polyurethane, silicon and ester, preferably, acrylic polymer can be selected.

[0051] In one example of the present application, it is characterized in that the above-mentioned additive can be one or more selected from accelerators, adhesion enhancers, dispersants and mixtures thereof, and preferably dispersants can be selected.

[0052] In one example of the present application, it is characterized in that the above-mentioned solvent can be one or more selected from water, alcohol, ester, ketone, ether and a mixture thereof, preferably ethanol, isopropanol and water.

[0053] The second aspect of the present application provides a method for detecting micro-leakage of a sprinkler head, wherein the sprinkler head comprises a bracket, a valve cover, a glass ball, and a splash plate, and is characterized in that it comprises: a step of applying a water-variable coating to the lower end or the upper end of the splash plate; when micro-leakage occurs at the site where the water-variable coating is applied, a step of detecting leakage based on the color change of the part where the micro-leakage occurs, wherein the water-variable coating comprises dyes, pigments, synthetic resins, additives and solvents.

[0054] Hereinafter, a method for detecting micro-leakage of a sprinkler head according to the second aspect of the present application will be described in detail.

[0055] In one example of the present application, after the step of applying the water-changing coating to the lower end or the upper end of the deflector, the step may further include performing drying by heat treatment at a temperature of 120 to 180° C. for 10 to 30 minutes. When the temperature range or the heat treatment time range is exceeded, the coating uniformity is reduced, thereby reducing the micro-leakage detection performance.

[0056] In one example of the present application, it is characterized in that in the step of applying the water-variable coating, the water-variable coating can be applied multiple times.

[0057] The following describes the embodiments of the present invention in detail so that those skilled in the art can easily implement the present invention. However, the present invention can be implemented in many different ways and is not limited to the embodiments described herein.

[0058] Embodiments 1 to 4: Preparation of water-variable coatings

[0059] Manufacture of water-variable coatings for detecting sprinkler leaks.

[0060] Preparation of dispersion

[0061] After mixing the components at different contents, the mixture was mixed at 6000 rpm for 5 minutes using a high-speed stirrer to prepare a dispersion.

[0062] Manufacturing of coating liquid

[0063] After mixing the resin in different contents with the prepared dispersion, the mixture was mixed at 6000 rpm for 15 minutes using a high-speed stirrer to prepare a coating solution.

[0064] Defoaming operation

[0065] The defoaming process was performed to remove the bubbles remaining in the prepared coating liquid. The defoaming process was performed by mixing at 2000 rpm for 5 minutes using a high-speed stirrer.

[0066] Table 1 below shows the contents of various raw materials constituting the water-variable coatings of Examples 1 to 4.

[0067] Table 1

[0068]

[0069] Example 2: Using water-transforming paint to coat the splash plate of a sprinkler head

[0070] The water-changeable coatings prepared in Examples 1 to 4 were applied to the lower or upper end of a sprinkler head in a thickness of 30 μm by spraying, and then thermally dried at 150° C., specifically for more than 10 minutes, to perform curing and drying.

[0071] Experimental Example 1: Performance evaluation of water-based paint sprinkler when leaking

[0072] After the water-changing paints prepared in Examples 1 to 4 were applied to the deflector of the sprinkler head, the performance during leakage was evaluated. The results are shown in FIG. Figure 2 middle.

[0073] Experimental Example 2: Evaluation of dye (reactive dye) changes

[0074] Figure 3 The results of evaluating the reactivity when changing the dye of water-changeable paint.

[0075] Experimental Example 3: Reactivity test of coating based on water-changing paint

[0076] Evaluation of micro-leakage responsiveness based on the number of times the water-variable coating is applied. Figure 4 Table showing the comparison of conditions and reactivity of single and double coating of water-variable coating.

[0077] The reaction solution was applied to a SUS plate in a thickness of 60 μm by bar coating and dried with hot air at 150° C. for 10 minutes. The reactivity was evaluated by dropping a drop of water on the coating film to confirm whether the coating film reacted.

[0078] Experimental Example 4: Evaluation of the reactivity of water-based coating thickness

[0079] After the water-changing paint is manufactured, it is applied to the lower end or upper / lower end of the splash plate of the sprinkler head in a spray spraying manner with a thickness of 10 to 30 μm in order to detect leakage.

[0080] Table 2 below shows the evaluation results of water reaction time based on coating thickness.

[0081] Table 2

[0082]

[0083] Experimental Example 5: Evaluation of adhesion and hardness under dry conditions

[0084] After the water-changeable coating was applied, the adhesion and hardness were evaluated according to the drying conditions. The results are shown in Table 3 below.

[0085] Table 3

[0086] Drying temperature(℃) 130 140 150 160 Drying time 10 minutes 10 minutes 10 minutes 10 minutes Dry or not X X O O Adhesion / Hardness 3B / HB 3B / 2H 5B / 4H 5B / 4H

[0087] Experimental Example 6: Humidity resistance test of water-changeable coating

[0088] The water-changeable paint of Example 1 was left to stand for 100 hours under an environment of 20° C. and 85% RH, and then its moisture resistance was evaluated.

[0089] Table 4 below shows the durability and reactivity evaluation items of the water-variable coating.

[0090] Table 4

[0091]

[0092] The foregoing description of the present invention is for illustration, and a person skilled in the art of the present invention should understand that the present invention can be easily deformed in a specific manner without changing the technical concept or essential features of the present invention. Therefore, it should be understood that the embodiments described above are illustrative in all aspects, rather than restrictive. For example, each structural element described in a single type can be implemented in a dispersed manner, and the structural elements described in a dispersed manner can also be implemented in a combined manner.

[0093] The scope of the present invention is indicated by the appended claims, and it should be interpreted that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.

Claims

1. A sprinkler head with micro-leakage detection function, characterized in that: include: Bracket; Valve cover; Glass balls; and Splash plate, It also includes: a water-changing coating layer, which is applied to the lower end or upper end surface of the splash plate, When the water-changeable coating layer leaks slightly, the slight leakage causes partial discoloration.

2. The micro-leakage detection functional sprinkler head according to claim 1, characterized in that: The water-variable coating layer is applied in a manner having a thickness of 10 to 50 μm, The coating is performed by any one selected from a wet method, a dry method, and a spray spray method.

3. The micro-leakage detection functional sprinkler head according to claim 1, characterized in that: Relative to 100% by weight of the water-variable coating, the present invention comprises: Dye 3 to 10% by weight; Pigment 5 to 10% by weight; Synthetic resin 10 to 25% by weight; The remaining amount of solvent.

4. The micro-leakage detection functional sprinkler head according to claim 1, characterized in that: The water-variable coating comprises 30 to 50 weight % of solid matter relative to 100 weight % of the water-variable coating.

5. The micro-leakage detection functional sprinkler head according to claim 1, characterized in that: The pH of the water-variable coating is in the range of 4 to 7.

6. The micro-leakage detection functional sprinkler head according to claim 3, characterized in that: The dye is a pH indicator or a redox indicator, which is any one of bromophenol blue, bromocresol green, indigo carmine and cresol red.

7. The micro-leakage detection functional sprinkler head according to claim 3, characterized in that: The pigment is an inorganic pigment selected from titanium dioxide, silicon dioxide, calcium carbonate, calcium oxide, calcium hydroxide, zeolite, activated carbon, bentonite and aluminum silicate.

8. The sprinkler head with micro-leakage detection function according to claim 3, characterized in that: The synthetic resin is one or more selected from the group consisting of alkyd, acrylic polymer, polyester, phenol, melamine, polyurethane, silicon and ester.

9. The sprinkler head with micro-leakage detection function according to claim 3, characterized in that: The additive is one or more selected from the group consisting of an accelerator, an adhesion enhancer, a dispersant and a mixture thereof.

10. The sprinkler head with micro-leakage detection function according to claim 3, characterized in that: The solvent is one or more selected from water, alcohol, ester, ketone, ether and a mixture thereof.

11. A method for detecting micro-leakage of a sprinkler head, the sprinkler head comprising a bracket; a valve cover; Glass ball; as well as The deflector plate is characterized by comprising: The step of applying water-changing paint to the lower end or the upper end of the splash plate; When a slight water leakage occurs at a part coated with the water-changing coating, a step of detecting leakage based on the color change of the part where the slight water leakage occurs, The water-variable paint comprises dyes, pigments, synthetic resins, additives and solvents.

12. The method for detecting micro-leakage of a sprinkler nozzle according to claim 11, characterized in that: After the step of coating the lower end or the upper end of the deflector with the water-changing paint, the method further comprises the step of performing drying by heat treatment at a temperature of 120 to 180° C. for 10 to 30 minutes.

13. The method for detecting micro-leakage of a sprinkler nozzle according to claim 11, characterized in that: In the step of applying the water-changing paint, the water-changing paint is applied multiple times.

Images