CN215855884U - Detect sticky tape that discolours of hydrogen leakage - Google Patents

Abstract

The utility model discloses a color-changing adhesive tape for detecting hydrogen leakage, which comprises an adhesive layer, a hydrogen detection layer and a substrate protective layer, wherein the hydrogen detection layer is arranged between the adhesive layer and the substrate protective layer, air holes are formed in the adhesive layer, the substrate protective layer is made of transparent materials, the hydrogen detection layer is an oxide layer, and catalysts are dispersed on the oxide layer. The color-changing adhesive tape is directly adhered to a part which is easy to leak hydrogen, is simple to operate, can accurately display the hydrogen leakage part through the color change of the adhesive tape, and has the advantages of rapid color change, high sensitivity, strong detection capability of the hydrogen leakage part, low cost and wide application range. In addition, the color-changing adhesive tape has extremely strong anti-interference performance and is not influenced by temperature, humidity, wind speed, dust, smoke and the like; the safety is high, and combustion cannot occur; and no extra power supply or energy is needed, so that the energy-saving and environment-friendly effects are achieved.

Description

Detect sticky tape that discolours of hydrogen leakage

Technical Field

The utility model belongs to the technical field of hydrogen leakage detection, and particularly relates to a color-changing adhesive tape for detecting hydrogen leakage.

Background

The hydrogen energy is a high-efficiency environment-friendly secondary energy source, the energy density is higher than that of other fuels, when the hydrogen energy is used for a fuel cell, the energy conversion efficiency is 2 times that of the traditional internal combustion engine, and the reaction product is clean. However, hydrogen belongs to flammable and explosive materials and has certain dangerousness, the explosion limit range of hydrogen is very wide, the lower explosion limit of the mixture of hydrogen and air is 4%, and the upper explosion limit is 80%. The chemical property of the hydrogen is very active, and when the hydrogen is mixed with the chlorine, the hydrogen can explode when being heated or irradiated by sunlight; if mixed with fluorine, explodes immediately. The ignition energy is very low, only 0.019mJ and very tiny open fire, such as static sparks generated by friction of clothes such as acrylic fiber, dacron and the like can cause explosion, and in addition, the explosion can be caused by violent impact. The hydrogen has light specific gravity, high molecular motion and diffusion speed, is easier to leak than other gases, is colorless and tasteless, and is not easy to be perceived by people. Hydrogen tends to accumulate on equipment, vessels and the top of buildings, thus increasing the risk of explosion and ignition. Hydrogen leak detection is very important and necessary based on the fire hazard and flammability and explosiveness of hydrogen.

The current methods for detecting hydrogen leakage are roughly two types:

the first is to use a detector to detect the hydrogen concentration, and has the advantages of small volume, low cost, easy operation, repeated use and low sensitivity, and can not detect the hydrogen leakage in time, detect the hydrogen leakage only and judge the specific part of the hydrogen leakage. If the specific part of the hydrogen leakage needs to be judged, further detection is needed. The hydrogen leakage of some equipment or pipelines is not continuous, the hydrogen leakage does not occur when the pressure is lower, and the hydrogen leakage occurs when the pressure exceeds a certain pressure, so that the method can cause inaccurate detection result and potential safety hazard.

The second method is to collect other physical data (pressure, current, voltage, etc.), judge hydrogen leakage through the parameters of the sensor, and has the advantages of high timeliness, large volume, high cost, limited application scene, and no judgment of specific position because only hydrogen leakage in a certain section can be detected. When the method is applied to the fuel cell, the working condition of the fuel cell is not a fixed value but a range, so the collected related parameters are also a range, and misjudgment is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a color-changing adhesive tape for detecting hydrogen leakage, which aims to solve the problems in the prior art in the background technology.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides a detect sticky tape that discolours of hydrogen leakage, includes adhesive layer, hydrogen detection layer and substrate protective layer, and the adhesive layer is the first layer, and hydrogen detection layer is the intermediate level, and the substrate protective layer is the third layer, adopts the preparation of colorless transparent material, can use the polyimide substrate but not limited to the polyimide substrate for isolated outside air, make hydrogen detection layer not receive external interference, conveniently observe the circumstances of discolouing simultaneously. The adhesive layer is provided with air holes, and the adhesive layer can ensure that the color-changing adhesive tape does not fall off when being stuck at a detection position. The hydrogen detection layer is an oxide layer, when the oxide meets hydrogen to generate reduction reaction, the oxide is reduced to generate color change, the hydrogen detection layer is dispersed with a catalyst, and the catalyst is used for accelerating the reduction reaction of the hydrogen, so that the detection is quicker and more accurate.

Preferably, the adhesive layer can be an aqueous pressure sensitive adhesive, but is not limited to aqueous pressure sensitive adhesives.

Preferably, the oxide layer may employ a metal oxide layer or a metal nanoparticle layer, but is not limited to a metal oxide. The metal oxide layer may be a tungsten oxide layer, a palladium oxide layer, a molybdenum oxide layer, a hydrate layer of a metal oxide, or the like. Different oxides have different initial colors, and the color change after reduction is different, so the application range is wide. The catalyst can be chloroplatinic acid, tetrabutyl titanate, dibutyl tin dioctoate and the like.

The width of the middle hydrogen detection layer can be slightly narrower than that of the adhesive layer and the base material protection layer, so that bonding edges are formed on two side edges of the adhesive layer and the base material protection layer, the hydrogen detection layer is wrapped between the two, hydrogen leaked from other positions is prevented from entering the inner part of the hydrogen detection layer from the edges of the two sides of the color-changing adhesive tape, and the hydrogen detection layer is enabled to generate color change, so that misjudgment of detection positions is caused. Only hydrogen permeating through the air holes of the adhesive layer can react with the hydrogen detection layer to change color, and the detection method is stable and reliable. The color-changing adhesive tape can not recover color once changing color. The hydrogen leakage prevention device is particularly suitable for equipment and pipelines with hydrogen which is not continuously leaked, potential safety hazards can be found in time, and the hydrogen leakage prevention device can prevent the hydrogen leakage from happening in the bud.

Compared with the defects and shortcomings of the prior art, the utility model has the following beneficial effects:

(1) the color-changing adhesive tape provided by the utility model is simple and direct in hydrogen detection, can quickly perform color-changing early warning, is high in sensitivity and wide in application range, only needs 10s in color-changing time, and can be widely used in hydrogen energy storage containers, pipelines and equipment, including but not limited to fuel cells. When the hydrogen leakage detection device is used, the color-changing adhesive tape is only needed to be adhered to a position where hydrogen leakage is easy to occur, the operation is simple, the hydrogen leakage position can be accurately displayed through color change of the adhesive tape, the hydrogen leakage position can be detected with higher capability, hidden danger of hydrogen leakage can be timely found, and the hydrogen leakage detection device is prevented from being affected in the bud.

(2) The color-changing adhesive tape has extremely strong anti-interference performance, and can change color only when hydrogen reaches the detection layer from the air holes of the adhesive layer; the device is not influenced by temperature, humidity, wind speed, dust, smoke and the like; the safety is high, and combustion cannot occur; no extra power supply or energy is needed, and the energy-saving and environment-friendly effects are achieved.

Drawings

Fig. 1 is a schematic structural diagram of a color-changing tape for detecting hydrogen leakage according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a color-changeable adhesive tape with a partially peeled adhesive layer according to an embodiment of the present invention.

In the figure: 1-an adhesive layer; 2-a hydrogen detection layer; 3-a substrate protective layer; 4-air holes; 5-a catalyst; 6-bonding edge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

A color-changing adhesive tape for detecting hydrogen leakage is shown in figure 1-2, wherein a first layer is an adhesive layer 1, the adhesive layer 1 is provided with air holes 4 for hydrogen to permeate, and a water-based pressure-sensitive adhesive can be adopted to ensure that the color-changing adhesive tape does not fall off when being stuck at a detection position.

The second layer is the hydrogen detection layer 2, which is an oxide layer, and a metal oxide layer or a metal nanoparticle layer can be adopted, but the metal oxide layer is not limited to metal oxide, and the metal oxide layer can be a tungsten oxide layer, a palladium oxide layer, a molybdenum oxide layer or a hydrate layer of metal oxide, and the like. Different oxides have different initial colors, and the color change after reduction is different, so the application range is wide. When the oxide meets hydrogen to generate reduction reaction, the oxide is reduced to generate color change. In order to increase the detection sensitivity, a small amount of catalyst 5 is dispersed on the hydrogen detection layer 2, the catalyst 5 can be chloroplatinic acid, tetrabutyl titanate, dibutyltin dioctoate and the like, and the catalyst 5 is used for accelerating the reduction reaction of hydrogen, so that the detection is faster and more accurate.

The third layer is substrate protective layer 3, adopts the colorless transparent material preparation, can use the polyimide substrate but not limited to the polyimide substrate for isolated outside air for hydrogen detection layer does not receive external interference, conveniently observes the circumstances of discolouing simultaneously.

When the hydrogen leakage detecting adhesive tape is used, the color-changing adhesive tape is only needed to be adhered to an inlet and an outlet of a storage container, a pipeline joint, a seam and a part which is easy to leak hydrogen, when the hydrogen leakage exists at the part, the hydrogen enters the inside of the color-changing adhesive tape from the air holes 4 of the adhesive layer 1 and reacts with the hydrogen detecting layer 2, the color-changing adhesive is permanently changed, once the color is changed, the original color can not be recovered, the color-changing time only needs 10s, and the sensitivity is high. Different adhesive tape hydrogen detection layers have different surface colors and different colors after discoloration due to different oxides. The adhesive tape has low cost, the thickness of less than 0.1mm, light weight and convenient and flexible use and operation. Even if only slight hydrogen leaks, the color-changing adhesive tape can change color, the sensitivity and the accuracy are extremely high, the color-changing process is irreversible, the anti-interference capability is strong, and misjudgment cannot occur due to environmental factors (temperature, humidity and wind speed are slightly influenced).

In order to prevent the hydrogen leaked from other positions from contacting with the edges of two sides of the color-changing adhesive tape to cause the hydrogen detection layer 2 in the middle layer to generate color change and influence the detection result in the use process of the color-changing adhesive tape, the width of the middle hydrogen detection layer 2 is set to be slightly narrower than that of the adhesive layer 1 and the base material protective layer 3, bonding edges 6 are formed on two sides of the adhesive layer 1 and the base material protective layer 3, the hydrogen detection layer 2 is wrapped between the two, only the hydrogen permeating from the air holes 4 of the adhesive layer 1 can react with the hydrogen detection layer to change color, and the detection method is stable and reliable.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. The utility model provides a detect sticky tape that discolours of hydrogen leakage which characterized in that, includes adhesive layer, hydrogen detection layer and substrate protective layer, the one side on hydrogen detection layer sets up the adhesive layer, is equipped with the bleeder vent on the adhesive layer, the another side on hydrogen detection layer sets up the substrate protective layer, and the substrate protective layer adopts transparent material to make, hydrogen detection layer is the oxide layer, and the dispersion has the catalyst on the oxide layer.

2. A color-changing adhesive tape for detecting hydrogen leakage according to claim 1, wherein the width of the hydrogen detecting layer is slightly narrower than the width of the adhesive layer and the substrate protective layer, adhesive edges are formed on both sides of the adhesive layer and the substrate protective layer, the adhesive layer is adhered to both sides of the substrate protective layer, and the hydrogen detecting layer is enclosed between the adhesive layer and the substrate protective layer.

3. A color-changing adhesive tape for detecting hydrogen leakage according to claim 1, wherein said adhesive layer is an aqueous pressure-sensitive adhesive.

4. A color-changing adhesive tape for detecting hydrogen leakage according to claim 1, wherein said substrate protective layer is made of polyimide substrate.

5. A color-changing adhesive tape for detecting hydrogen leakage according to claim 1, wherein said oxide layer is a metal oxide layer or a metal nanoparticle layer.

6. The color-changing tape for detecting hydrogen leakage according to claim 5, wherein the metal oxide layer is a tungsten oxide layer or a palladium oxide layer or a molybdenum oxide layer or a hydrate layer of a metal oxide.

7. The color-changing adhesive tape for detecting hydrogen leakage according to claim 1, wherein the catalyst is one or more of chloroplatinic acid, tetrabutyl titanate and dibutyltin dioctoate.

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