Temperature indicating color changing material for power system and preparation method thereof

Abstract

The application discloses a temperature indicating color-changing material for a power system and a preparation method thereof, wherein the temperature indicating color-changing material takes CoCl2*6H2O and MgSO4*7H2O as raw materials; the temperature indicating color-changing material appears obvious red and blue bichromatism at 90-100 DEG C, and presents the temperature indicating color-changing material. Since the red and blue bichromatism is relatively strong and obvious in vision, the red and blue bichromatism is still easy to identify even if the operation condition environment of power system equipment, wire terminals and the like is complex and the surrounding environment color light exists influence, therefore, the application meets the effective and sensitive monitoring requirement of the heating fault of the power system equipment, wire terminals and the like, and realizes a simple, quick and convenient and relatively accurate overheat fault troubleshooting scheme.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric power, in particular to a temperature indicating color-changing material for electric power system and a preparation method thereof. BACKGROUND

[0002] As a pillar industry of national economy, the electric power industry plays an important role in the production activities of all walks of life. In the electric power transmission and distribution system, the electric power line has the characteristics of wide laying range, long distance and exposure to the outdoor environment, and the electric power equipment has the characteristics of multiple types, large quantity and wide range of use. The transmission line and the electric power equipment often generate a large amount of heat due to faults, thereby causing the temperature of the equipment to rise. For example, after a lightning strike accident, which accounts for 35% of the accidents of the transmission and distribution line, the arc light converts electric energy into heat energy, causing the temperature of the channel to rise. The electrical equipment is operated 24 hours a day, and various abnormal heating phenomena are also very common. If the heat barrier point is not promptly investigated, it may cause accidents and cause incalculable losses. Early detection of fault points can save a lot of property and even lives. The currently used infrared diagnostic technology is the most accurate overheat fault detection method, but it also has many defects such as expensive equipment, strict environmental adaptation requirements, and requirements for the quality of the users.

[0003] Therefore, it is necessary to develop a simple, fast, convenient and relatively accurate overheat fault investigation scheme to overcome the above technical problems. SUMMARY

[0004] Therefore, the present application provides a temperature indicating color-changing material for electric power system, characterized in that:

[0005] The temperature indicating color-changing material uses CoCl2•6H2O and MgSO4•7H2O as raw materials.

[0006] At 90 to 100 degrees Celsius, the temperature indicating color-changing material shows obvious red and blue bichromatic changes, and presents the temperature indicating color-changing material.

[0007] Preferably,

[0008] The molar ratio of CoCl2•6H2O to MgSO4•7H2O is 1:(0.5-2.5).

[0009] Preferably,

[0010] The temperature indicating color-changing material is a coating.

[0011] Preferably,

[0012] When the temperature indicating color-changing material is a coating, the paint base material is alkyd varnish, and the temperature indicating color-changing material is CoCl2•6H2O•0.5MgSO4•7H2O.

[0013] Preferably,

[0014] When the temperature-indicating color-changing material is a paint, the paint base material is a latex paint, and the temperature-indicating color-changing material is CoCl2•6H2O•1.0MgSO4•7H2O.

[0015] Preferably,

[0016] When the temperature-indicating color-changing material is a paint, the paint base material is polyvinyl alcohol, and the temperature-indicating color-changing material is CoCl2•6H2O•2.5MgSO4•7H2O.

[0017] Preferably,

[0018] When the temperature-indicating color-changing material is a paint, the paint base material is polyurethane, and the temperature-indicating color-changing material is CoCl2•6H2O•0.5MgSO4•7H2O.

[0019] Preferably,

[0020] When the temperature-indicating color-changing material is a paint, the paint base material is epoxy resin, and the temperature-indicating color-changing material is CoCl2•6H2O•2.0MgSO4•7H2O.

[0021] In addition, the present application also discloses a preparation method of the temperature-indicating color-changing material for the power system, comprising the following steps:

[0022] S100, weighing a proper amount of CoCl2•6H2O and MgSO4•7H2O, mixing them in a container to prepare a mixture A;

[0023] S200, adding a small amount of water, grinding and mixing the mixture to prepare a mixture B;

[0024] S300, drying the mixture B to remove water to prepare the temperature-indicating color-changing material;

[0025] Preferably,

[0026] When the temperature is 90-100 degrees Celsius, the temperature-indicating color-changing material has a clear red-blue bichromatic change.

[0027] Preferably,

[0028] S400, proportionally configuring the temperature-indicating color-changing material and the paint base material to prepare a paint.

[0029] In summary, due to the relatively strong and obvious contrast of red and blue colors in vision, even if the power system equipment, wire terminal and the like are in complex operating conditions and the surrounding environment color light exists, the red and blue colors are still easy to identify, which meets the effective and sensitive monitoring requirements of the power system equipment, wire terminal and the like in heat failure, and a simple, fast and convenient and relatively accurate overheat failure troubleshooting scheme is realized. DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application.

[0031] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship of the product in use, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0034] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0035] Embodiment 1

[0036] A temperature indicating color changing material for a power system, preferably 11.85 grams of CoCl2·6H2O and 6.16 grams of MgSO4·7H2O are weighed and placed in a mortar for thorough mixing, then a small amount of H2O is added to the mortar, and grinding and mixing are performed with a mortar rod. Finally, the mortar is placed in a constant temperature drying oven, and its color is observed to change from red to blue at 90-100℃ in the temperature range of 70-105℃.

[0037] Embodiment 2

[0038] A temperature indicating color changing material for power system, preferably take 11.85 grams of CoCl2·6H2O, 18.50 grams of MgSO4·7H2O, put them in a mortar and mix well, then add a small amount of H2O to the mortar and grind and mix with a mortar rod. Finally, place the mortar in a constant temperature drying oven, and observe the color change in the temperature range of 70-105℃. Observation found that at 95℃, the color changed from light red to blue.

[0039] Example 3

[0040] A temperature indicating color changing material for power system, preferably take 11.85 grams of CoCl2·6H2O, 15.41 grams of MgSO4·7H2O, put them in a mortar and mix well, then add a small amount of H2O to the mortar and grind and mix with a mortar rod. Finally, place the mortar in a constant temperature drying oven, and observe the color change in the temperature range of 70-105℃. Observation found that at 100℃, the color changed from red to blue.

[0041] Example 4

[0042] A temperature indicating color changing material for power system, preferably take 11.85 grams of CoCl2·6H2O, 12.32 grams of MgSO4·7H2O, put them in a mortar and mix well, then add a small amount of H2O to the mortar and grind and mix with a mortar rod. Finally, place the mortar in a constant temperature drying oven, and observe the color change in the temperature range of 70-105℃. Observation found that at 100℃, the color changed from red to blue.

[0043] Example 5

[0044] A temperature indicating color changing material for power system, preferably take 11.85 grams of CoCl2·6H2O, 30.81 grams of MgSO4·7H2O, put them in a mortar and mix well, then add a small amount of H2O to the mortar and grind and mix with a mortar rod. Finally, place the mortar in a constant temperature drying oven, and observe the color change in the temperature range of 70-105℃. Observation found that at 90℃, the color changed from red to blue.

[0045] Example 6

[0046] A temperature indicating color changing material for power system, preferably take 11.85 grams of CoCl2·6H2O, 24.65 grams of MgSO4·7H2O, put them in a mortar and mix well, then add a small amount of H2O to the mortar and grind and mix with a mortar rod. Finally, place the mortar in a constant temperature drying oven, and observe the color change in the temperature range of 70-105℃. Observation found that at 90℃, the color changed from red to blue.

[0047] For the above-mentioned embodiments, since the red and blue colors are relatively strong and obvious in visual contrast, even if the operating conditions of the power system equipment, wire terminals and the like are complex and the surrounding environment color light exists, the red and blue colors are still easy to identify, which meets the effective and sensitive monitoring requirements of the overheat fault of the power system equipment, wire terminals and the like, and realizes a simple, fast, convenient and relatively accurate overheat fault troubleshooting scheme.

[0048] In one embodiment,

[0049] The color-changing material obtained in the foregoing embodiments of the present application is made into a temperature indicating coating, which can be coated on the surface of power distribution equipment. When the power distribution equipment generates heat, the coating on the surface of the power distribution equipment will show color change, thereby realizing temperature monitoring and warning of the power distribution equipment and improving the safety of the power distribution equipment. Moreover, the preparation of the coating has lower cost than the use of infrared equipment and has lower requirements for the power distribution equipment itself, and has wider application.

[0050] For example, the present application provides a temperature indicating coating, which is prepared by compounding the color-changing material obtained by the present application with one of the paint base materials on the market, such as alkyd varnish, latex paint, polyvinyl alcohol, polyurethane and epoxy resin.

[0051] In one embodiment,

[0052] When the temperature indicating color-changing material is a coating, the paint base material is alkyd varnish, and the temperature indicating color-changing material is CoCl2•6H2O•0.5MgSO4•7H2O.

[0053] In one embodiment,

[0054] When the temperature indicating color-changing material is a coating, the paint base material is latex paint, and the temperature indicating color-changing material is CoCl2•6H2O•1.0MgSO4•7H2O.

[0055] In one embodiment,

[0056] When the temperature indicating color-changing material is a coating, the paint base material is polyvinyl alcohol, and the temperature indicating color-changing material is CoCl2•6H2O•2.5MgSO4•7H2O.

[0057] In one embodiment,

[0058] When the temperature indicating color-changing material is a coating, the paint base material is polyurethane, and the temperature indicating color-changing material is CoCl2•6H2O•0.5MgSO4•7H2O.

[0059] In one embodiment,

[0060] The paint base material of the temperature indicating color changing material is epoxy resin, and the temperature indicating color changing material is CoCl2•6H2O•1.0MgSO4•7H2O.

[0061] In one embodiment,

[0062] The paint base material of the temperature indicating color changing material is epoxy resin, and the temperature indicating color changing material is CoCl2•6H2O•2.0MgSO4•7H2O.

[0063] In one embodiment,

[0064] The paint base material of the temperature indicating color changing material is epoxy resin, and the temperature indicating color changing material is CoCl2•6H2O•2.0MgSO4•7H2O.

[0065] In one embodiment,

[0066] The paint base material of the temperature indicating color changing material is epoxy resin, and the temperature indicating color changing material is CoCl2•6H2O•2.0MgSO4•7H2O.

[0067] In one embodiment,

[0068] The paint base material of the temperature indicating color changing material is epoxy resin, and the temperature indicating color changing material is CoCl2•6H2O•2.0MgSO4•7H2O.

[0069] The mass ratio of the temperature indicating color changing material to the paint base material is 1:1-1:10, the color changing temperature range is 90-100℃, the color change is from red to blue, and the temperature indicating color changing material is completely suitable for the effectiveness and sensitivity monitoring requirements of the power system equipment heating fault.

[0070] For example, 30g of the paint base material, 20g of the temperature indicating color changing material, and an appropriate amount of solvent (such as water) are used to prepare the color changing paint according to the various embodiments of the temperature indicating color changing material, and the color changing effects of the different temperature indicating color changing paints are as follows:

[0071] Table 1 Color changing effects of different temperature indicating color changing paints

[0072] Paint base materials Temperature indicating color changing materials Color change temperature (°C) Color change Alkyd varnish CoCl2-6H2O 0.5 MgSO4-7H2O 100 Red → Blue Latex paint CoCl2-6H2O 1.0 MgSO4-7H2O 95 Red → Blue Polyvinyl alcohol CoCl2-6H2O-2 .5 MgSO4-7H2O 90 Red → Blue Polyurethane CoCl2-6H2O 0.5 MgSO4-7H2O 100 Red → Blue Epoxy resin CoCl2-6H2O 1.0 MgSO4-7H2O 95 Red → Blue Alkyd varnish CoCl2-6H2O-2.5MgSO4-7H2O 90 Red → Blue Polyvinyl alcohol CoCl2-6H2O 0.5 MgSO4-7H2O 100 Red → Blue Polyurethane CoCl2-6H2O 1.5 MgSO4-7H2O 95 Red → Blue Epoxy resin CoCl2-6H2O 2.0 MgSO4-7H2O 90 Red → Blue

[0073] In one embodiment, the present application provides a temperature indicating color changing material for a power system, characterized in that:

[0074] The temperature indicating color changing material uses CoCl2•6H2O and MgSO4•7H2O as raw materials.

[0075] The temperature indicating color changing material has obvious red and blue bichromatic changes at 90-100 degrees Celsius.

[0076] In one embodiment,

[0077] The molar ratio of CoCl2·6H2O and MgSO4·7H2O is 1:(0.5-2.5).

[0078] In one embodiment,

[0079] The temperature indicating color changing material is paint.

[0080] In addition, in one embodiment, the application also discloses a preparation method of the temperature indicating color changing material for the power system, comprising the following steps:

[0081] S100, weighing appropriate amounts of CoCl2·6H2O and MgSO4·7H2O, mixing them in a container to prepare a mixture A;

[0082] S200, adding a small amount of water, grinding and mixing the mixture to prepare a mixture B;

[0083] S300, drying the mixture B to remove water to prepare the temperature indicating color changing material;

[0084] The temperature indicating color changing material has obvious red and blue bichromatic changes at 90-100 degrees Celsius.

[0085] The temperature indicating color changing material has obvious red and blue bichromatic changes at 90-100 degrees Celsius.

[0086] In one embodiment,

[0087] S400, proportionally configuring the temperature indicating color changing material and the paint base material to prepare a paint.

[0088] The application has the following remarkable effects:

[0089] In the prior art, the copper and cobalt composite temperature indicating color changing paint prepared by taking CuCl2·2H2O, CoCl2·6H2O, MgCl2·6H2O and Al2O3 as raw materials is a temperature indicating paint with green as the base color, and in actual use, the color change is not obvious (light yellow green→yellow green→emerald green→grass green). The copper and cobalt composite temperature indicating paint is essentially a composite temperature indicating paint with the color of copper salt as the base color, and the cobalt salt mainly plays a color adjusting role. In actual use, the color changes of the two influence each other, so that the color change is not obvious, the color difference change is small, and the color is easily affected by the running working condition environment, which cannot meet the effective and sensitive monitoring requirements of the power system equipment heating failure.

[0090] The application takes CoCl2.6H2O and MgSO4.7H2O as raw materials, and the molar ratio of CoCl2.6H2O and MgSO4.7H2O is as follows:

[0091] n (CoCl2.6H2O): n (MgSO4.7H2O)=1:(0.5-2.5),

[0092] The prepared coating has obvious color change, overcomes the defects of the copper and cobalt composite temperature indicating coating in the prior art, i.e. the color change is not obvious (light yellow green→yellow green→emerald green→grass green), the color difference change is small, the color is easily affected by the color light under the operating condition, and the temperature indicating coating cannot meet the monitoring requirements of the effectiveness and sensitivity of the power system equipment heating fault, is more practical, has significant social and economic benefits, and realizes a simple, fast, convenient and relatively accurate overheating fault troubleshooting scheme.

[0093] The above is only a specific embodiment of the application, but the protection scope of the application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A thermochromic material for power systems, characterized in that: The thermochromic material is made from CoCl2•6H2O and MgSO4•7H2O. At 90 to 100 degrees Celsius, the thermochromic material exhibits a distinct red and blue color change, thus becoming a thermochromic material. in, The molar ratio of CoCl2•6H2O and MgSO4•7H2O is 1:(0.5-2.5); The preparation method of the thermochromic material includes the following steps: S100, weigh appropriate amounts of CoCl2•6H2O and MgSO4•7H2O and place them in a container and mix thoroughly to obtain mixture A; S200, Add a small amount of water, grind and mix the mixture evenly to obtain mixture B; S300. The mixture B is dried to remove moisture in order to obtain a thermochromic material.

2. A temperature-indicating coating, characterized in that, The coating is prepared by compounding the thermochromic material for power systems as described in claim 1 with one of the following paint base materials: alkyd varnish, latex paint, polyvinyl alcohol, polyurethane, and epoxy resin.

3. The temperature-indicating coating according to claim 2, wherein, When the base material is alkyd varnish, the thermochromic material is CoCl2•6H2O•0.5MgSO4•7H2O.

4. The temperature-indicating coating according to claim 2, wherein, When the paint base material is latex paint, the thermochromic material is CoCl2•6H2O•1.0MgSO4•7H2O.

5. The temperature-indicating coating according to claim 2, wherein, When the paint base material is polyvinyl alcohol, the thermochromic material is CoCl2•6H2O•2.5MgSO4•7H2O.

6. The temperature-indicating coating according to claim 2, wherein, When the paint base material is polyurethane, the thermochromic material is CoCl2•6H2O•0.5MgSO4•7H2O.

7. The temperature-indicating coating according to claim 2, wherein, When the paint base material is epoxy resin, the thermochromic material is CoCl2•6H2O•2.0MgSO4•7H2O.