Sensor for detecting chemical leakage in chemical reaction process

Abstract

The invention relates to a sensor for detecting chemical leakage in a chemical reaction process, which comprises a leakage sensor arranged on a base membrane, an electrode layer is arranged above the leakage sensor, the electrode layer is composed of two or more strands of wires, the wires are coated with amphoteric oxide, a reaction layer is arranged above the electrode layer, and the reaction layer is coated with amphoteric oxide. The reaction layer is made of polymer resin, the surface of the reaction layer is coated with a PH dye, and an absorption layer is arranged above the reaction layer. The electrode layer, the reaction layer and the absorption layer are arranged, the wire forming the electrode layer is coated with the amphoteric oxide, the amphoteric oxide is a product of combination of metal or non-metal elements and oxygen and can react with an acid solution or an alkaline solution, the wire is made of a metal material, the reaction with the leaked acid solution or alkaline solution can be accelerated, and the leakage of the acid solution or the alkaline solution is avoided. Metal compounds and hydrogen are generated, the detection time consumed by dangerous chemical leakage is shortened, problems can be found and handled in time, and accidents are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical leakage in a chemical reaction process, and in particular relates to a sensor for detecting chemical leakage in a chemical reaction process. Background Art

[0002] In the reaction process of chemicals, accidents often occur due to leakage of substances at a certain place, causing casualties, economic losses, and environmental damage. In order to formulate corresponding countermeasures for this phenomenon, the "Chemical Substance Management Law" came into effect on January 1, 2015. Although this law has been implemented, accidents cannot be avoided. To solve such problems, various companies have launched sensors for detecting water leaks or chemical leaks, such as cable leak sensors, membrane leak sensors, and modular leak sensors.

[0003] The membrane leak sensor is a linear sensor that detects water leaks by changing resistance. Although it is safe and widely used, it is prone to false alarms under conditions of high humidity and external impact, and cannot accurately determine the leak location. It is also fixed during installation and requires a separate bracket. The only external device that can be connected is the relay contact type.

[0004] A cable leak sensor is a type of sensor that can accurately report the location of a liquid chemical leak by detecting the resistance of the liquid chemical leaking in response to the current flowing through the conductor. However, the installation cost is high, and the cable sensor is limited in length, which can easily restrict its use. A separate bracket is required for installation. Due to the limited flexibility of the cable, installation is difficult, incurring additional costs. After a leak is detected, a lot of time is required to clean up the leaked material, and it is difficult to connect to external equipment.

[0005] The modular leak sensor is a method of detecting leaks using light / liquid refraction and capacitive sensors that place a photoelectric sensor with a light receiving part and a light emitting part less than 4cm in diameter in a plastic housing. When not detecting liquid substances, the light beam from the light emitting part passes directly to the light receiving part, but when the light emitting part detects liquid, the refractive index changes, thereby detecting the leak. Although it is cheap, easy to install, and rarely fails even in wet conditions, it is difficult to detect leaks when the sensor is located outside the limit range, and it takes a lot of time to install.

[0006] Although there are various types of leak sensors on the market, there is still no product that can effectively detect leaks. Summary of the invention

[0007] The purpose of the present invention is to solve the above-mentioned problem. The present application proposes a sensor for detecting leakage of chemicals during a chemical reaction process. The sensor is provided with an electrode layer, a reaction layer, and an absorption layer. The surface of the reaction layer is coated with a polymer resin and a PH dye. When the chemical leaks, it will react with the substance on the reaction layer, or the color of the PH dye will change, thereby inferring the leakage of the chemical substance during the reaction process and accurately determining the location of the leakage.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A sensor for detecting chemical leakage during a chemical reaction, comprising a leakage sensor installed on a base film, an electrode layer is provided above the leakage sensor, the electrode layer is composed of two or more strands of wires, the wires are coated with amphoteric oxides, a reaction layer is provided above the electrode layer, a pH dye is coated on the surface of the reaction layer, an absorption layer is provided above the reaction layer, and the absorption layer includes a protective layer.

[0009] Furthermore: the protective layer is made of a flexible and durable film, and one, two or more parallel and spaced sensing holes are provided on the film. The absorption layer is made of non-woven fabric, fabric or pulp to absorb leaked chemicals, thereby increasing the contact area with the leakage sensor.

[0010] Furthermore: the wires constituting the electrode layer are made of metal materials, including silver, nickel, and aluminum.

[0011] Furthermore: the wires are provided in various forms, such as wavy, concave-convex, and zigzag, and are arranged at regular intervals and shapes.

[0012] Further: the amphoteric oxide is a product of the combination of metal or non-metal elements and oxygen, and can react with acidic solutions or alkaline solutions.

[0013] Furthermore: the polymer resin is selected from polypropylene, polyethylene, polystyrene, polyvinyl chloride, polyvinyl acetate or polyacrylonitrile.

[0014] Preferred: The pH dye changes color when a chemical leak occurs.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The leakage sensor of the present invention is provided with an electrode layer, a reaction layer, and an absorption layer, and an amphoteric oxide is coated on the wire constituting the electrode layer. The amphoteric oxide is a product of the combination of metal or non-metal elements and oxygen, and can react with an acidic solution or an alkaline solution. The wire is made of a metal material, which can accelerate the reaction with the leaked acidic or alkaline solution to produce metal compounds and hydrogen, and can shorten the detection time consumed by the leakage of hazardous chemicals.

[0016] The reaction layer is made of polymer resin and coated with pH dye on the surface. pH dye is used as a component that exhibits chemical reactions and color changes. When a chemical leak occurs, the pH dye will change color, making it easy to confirm water leaks or chemical leaks, and can also accurately determine the location of the leak.

[0017] An absorption layer is arranged above the reaction layer, and the absorption layer also includes a protective layer. The absorption layer uses non-woven fabric, pulp or fabric to increase the contact area between the leaked chemicals and the leakage sensor, accelerate the reaction speed, shorten the time to discover chemical leakage, discover and deal with problems in time, and reduce the occurrence of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only for more clearly illustrating the embodiments of the present invention or the technical solutions in the prior art. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of the components of the leakage sensor of the present invention; Figure 2 is a cross-sectional view of the structure diagram of the leakage sensor of the present invention; Figure 3 Schematic diagram of the arrangement of wires on the electrode layer of the present invention, wherein a) is a concave-convex shape, b) is a sawtooth shape, and c) is a wavy shape; In the figure: 1-leakage sensor, 2-base membrane, 3-electrode layer, 4-reaction layer, 5-absorption layer, 6-protective layer. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the present invention is further described below in conjunction with specific embodiments. However, the embodiments are only intended to illustrate the present invention and not to limit the present invention.

[0021] like Figures 1 to 3 A sensor for detecting chemical leakage during a chemical reaction process is shown, comprising a leakage sensor mounted on a base membrane, an electrode layer being provided above the leakage sensor, a reaction layer being provided above the electrode layer, an absorption layer being provided above the reaction layer, and the absorption layer comprising a protective layer.

[0022] The electrode layer is composed of two or more wires, which are made of metal materials, including silver, nickel, aluminum, copper or nano-carbon. The wires are provided with various forms, such as wavy, concave-convex, and serrated, and are arranged at regular intervals and shapes. The wires are coated with amphoteric oxides, which are products of the combination of metal or non-metal elements and oxygen, and can react with acidic solutions or alkaline solutions.

[0023] The absorption layer includes a protective layer, and the absorption layer is made of non-woven fabric, pulp or fabric to absorb the leaked chemicals to increase the contact area between the leaked chemicals and the leakage sensor. The protective layer is made of a film with strong flexibility and durability, which improves the external impact and durability of the leakage sensor. In addition, one row, two rows or more rows of parallel and spaced sensing holes are opened on the film to prevent accidental contact with undetected objects during use and installation, thereby preventing damage to the sensor.

[0024] The reaction layer is made of polymer resin. The mixed polymer resin is put into a printing machine and printed with a thickness of 3 to 5 microns to obtain a reaction layer film. The surface of the reaction layer is coated with a PH dye. The reaction layer is provided with a number of sensing holes that can react with the leaked chemicals sucked into the absorption layer. The reaction layer is also provided with a PH dye that can distinguish between acidic solutions and alkaline solutions. If a water leak is encountered, the PH dye will not be misjudged. The change in color of the PH dye can be used to determine whether there is a leak, which can greatly shorten the detection time and accurately determine the location of the leak.

[0025] The polymer resin, polypropylene, polyethylene, polystyrene, polyvinyl chloride, polyvinyl acetate or polyacrylonitrile, can react with acidic or alkaline solution and cause dissolution or decomposition to shorten the reaction time.

[0026] Leak sensor production process: The thickness of the film used for the electrode layer is 50~150 μm , width 1200mm, length 1000m, install the prepared electrode layer film on the gravure printing machine, use commercial silver paste at 3~5 μm The two wires are printed with a thickness of 100 mm and a spacing of 4 mm (the printing conditions are: roller temperature 80°C, speed 100 m / min, and two wires are printed with a spacing of 3 mm under high pressure); then the electrode layer printed with the wires is mounted on the gravure printer again to print the reaction layer of the leakage sensor, and the mixed polymer resin is placed in the printer for 3 to 5 μm The reaction layer is printed with a thickness of 1000 nm to obtain a reaction layer, and the reaction layer is laminated with a protective layer having a sensing hole.

[0027] Preferably: the leakage sensor is connected to a terminal (the terminal may be a computer, a smart phone, a display, etc.), and through the reaction in the reaction layer and the change in the color of the PH dye, the location of the leakage can be accurately detected, and the signal can be transmitted to the user end to alarm and serve as a warning, which is convenient for the staff to make corresponding processing and subsequent arrangements, reduce casualties and loss of raw materials, and save costs.

[0028] Preferably, since the present invention is provided with a PH dye, if water flows out during the chemical reaction process, the PH dye will not change color, and the leakage sensor will not produce a false alarm phenomenon.

[0029] The present invention coats amphoteric oxides on the wires constituting the electrode layer, which can react with acidic solutions or alkaline solutions. The wires are made of metal materials, which can accelerate the reaction with the leaked acidic or alkaline solutions to produce metal compounds and hydrogen, thereby shortening the detection time consumed by the leakage of hazardous chemicals. The reaction layer is made of polymer resin and coated with pH dye on the surface. pH dye is used as a component that exhibits chemical reactions and color changes. When a chemical leak occurs, the pH dye will change color, making it easy to confirm water leaks or chemical leaks, and can also accurately determine the location of the leak.

[0030] An absorption layer is arranged above the reaction layer, and the absorption layer also includes a protective layer. The absorption layer uses non-woven fabric, pulp or fabric to increase the contact area between the leaked chemicals and the leakage sensor, accelerate the reaction speed, shorten the time to discover chemical leakage, discover and deal with problems in time, and reduce the occurrence of accidents.

[0031] The contents not described in detail in the present invention are all prior art.

[0032] The above description is only a preferred embodiment of the present invention, and is not limited to the description in the specification and implementation. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention should be included in the scope of the present invention.

Claims

1. A sensor for detecting chemical leakage during a chemical reaction, comprising a leakage sensor mounted on a base film, characterized in that: An electrode layer is provided above the leakage sensor, the electrode layer is composed of two or more wires, the wires are coated with amphoteric oxides, a reaction layer is provided above the electrode layer, the reaction layer is made of polymer resin and coated with PH dye on the surface, an absorption layer is provided above the reaction layer, and the absorption layer includes a protective layer.

2. A sensor for detecting chemical leakage during a chemical reaction according to claim 1, characterized in that: The protective layer is made of a flexible and durable film with one, two or more parallel and spaced sensing holes. The absorption layer is made of non-woven fabric, fabric or pulp to absorb leaked chemicals and increase the contact area with the leakage sensor.

3. A sensor for detecting chemical leakage during a chemical reaction process according to claim 1, characterized in that: The conductive wires constituting the electrode layer are made of metal materials, including silver, nickel, aluminum, copper or nano-carbon.

4. A sensor for detecting chemical leakage during a chemical reaction process according to claim 3, characterized in that: The conductors are provided in various forms, such as wave shape, concave-convex shape, sawtooth shape and are arranged in regular intervals and shapes.

5. A sensor for detecting chemical leakage during a chemical reaction process according to claim 1, characterized in that: The amphoteric oxide is a product of the combination of a metal or non-metal element and oxygen, and can react with an acidic solution or an alkaline solution.

6. A sensor for detecting chemical leakage during a chemical reaction process according to claim 1, characterized in that: The polymer resin is selected from polypropylene, polyethylene, polystyrene, polyvinyl chloride, polyvinyl acetate or polyacrylonitrile.

7. A sensor for detecting chemical leakage during a chemical reaction process according to claim 1, characterized in that: The pH dye changes color when a chemical leak occurs.

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