A porous aluminum oxide membrane for nitrogen and oxygen sensors

Abstract

The invention discloses a porous aluminum oxide film for a nitrogen oxygen sensor, comprising a metal protective shell, a protective groove and a wire. The surface of the metal protective shell is provided with a protective groove, one side of the metal protective shell is fixedly connected with a wire, and the inside of the protective groove is fixedly connected with a porous aluminum oxide film for protecting the metal protective shell and internal equipment thereof. The porous aluminum oxide film for the nitrogen oxygen sensor will not enhance or weaken the nitrogen oxygen detection current by installing a porous aluminum oxide layer, and the current value will not be affected, thereby ensuring the accuracy of the nitrogen oxygen detector data, facilitating the full reaction of exhaust gas and the nitrogen oxygen detection sensor, being able to directly observe the use of internal instruments, being able to replace damaged instruments in time, and ensuring the normal use of the nitrogen oxygen detector. By installing an adhesive layer, the solvent-free glue used in the adhesive layer does not contain an organic solvent, is very environmentally friendly, will not cause harm to the user's body, and has a strong bonding force.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum oxide films, in particular to a porous aluminum oxide film for a nitrogen oxygen sensor. Background Art

[0002] The nitrogen oxide sensor is a consumable part in the exhaust gas analyzer. As the country pays more and more attention to environmental protection, diesel vehicle emission regulations are becoming increasingly stringent. Vehicles above National IV have added SCR after-treatment systems. The nitrogen oxide sensor is one of the most critical components in the SCR after-treatment system. It detects the nitrogen oxide concentration in the exhaust gas in the engine exhaust pipe during engine operation and detects whether the nitrogen oxide emissions meet the regulatory requirements.

[0003] When conducting nitrogen and oxygen detection on exhaust gas, the detection probe of the nitrogen and oxygen detector needs to contact the exhaust gas. The aluminum oxide film in the gap part of the existing detection probe is not easy to bond, which can easily lead to uneven application of the adhesive and affect the normal use of the aluminum oxide film. The aluminum oxide film rarely has air holes, which will affect the normal use of the detection probe.

[0004] To this end, we propose a porous alumina membrane for nitrogen oxide sensors. Summary of the invention

[0005] The object of the present invention is to provide a porous aluminum oxide membrane for a nitrogen oxygen sensor with beautiful appearance and practical performance, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a porous alumina membrane for a nitrogen oxygen sensor, comprising a metal protective shell, a protective groove and a wire, wherein a protective groove is provided on the surface of the metal protective shell, a wire is fixedly connected to one side of the metal protective shell, and a porous alumina membrane for protecting the metal protective shell and its internal equipment is fixedly connected inside the protective groove.

[0007] Preferably, the porous alumina membrane includes an electrolytic coloring layer, a porous alumina layer and an adhesive layer, the inner wall of the protective groove is fixedly connected with the adhesive layer, the top of the adhesive layer is fixedly connected with the porous alumina layer, and the top of the porous alumina layer is fixedly connected with the electrolytic coloring layer.

[0008] Preferably, the porous alumina layer has electrical insulation properties.

[0009] Preferably, the porous alumina layer has porosity and transparency.

[0010] Preferably, the adhesive layer is made of solvent-free glue.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention installs a porous aluminum oxide layer, which will not enhance or weaken the nitrogen oxide detection current, and the current value will not be affected, thereby ensuring the accuracy of the nitrogen oxide detector data, facilitating the full reaction of the exhaust gas and the nitrogen oxide detection sensor, being able to directly observe the use of internal instruments, and being able to replace damaged instruments in time to ensure the normal use of the nitrogen oxide detector. By installing an adhesive layer, the solvent-free glue used in the adhesive layer does not contain organic solvents, is very environmentally friendly, and will not cause harm to the user's body. The solvent-free glue has strong bonding force, and the material can be adhered after maintaining a certain pressure for one to two hours. After being placed for three days, the material can be subjected to subsequent processing such as cutting, cutting, planing, grinding, and drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 Schematic diagram of the structure of the porous alumina membrane of the present invention.

[0015] In the figure: 1. Metal protective shell; 2. Protective groove; 3. Porous aluminum oxide film; 31. Electrolytic coloring layer; 32. Porous aluminum oxide layer; 33. Adhesive layer; 4. Wire. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1 The porous alumina membrane for a nitrogen oxygen sensor shown in the figure includes a metal protective shell 1, a protective groove 2 and a wire 4. The surface of the metal protective shell 1 is provided with a protective groove 2, and a wire 4 is fixedly connected to one side of the metal protective shell 1. A porous alumina membrane 3 for protecting the metal protective shell 1 and the equipment inside the metal protective shell 1 is fixedly connected inside the protective groove 2. Adhesive is applied to the inner wall of the protective groove 2, and the porous alumina membrane 3 and the metal protective shell 1 are fixedly connected to protect the metal protective shell 1 and the equipment inside the metal protective shell 1.

[0018] See also Figure 2The porous alumina membrane 3 includes an electrolytic coloring layer 31, a porous alumina layer 32 and an adhesive layer 33. The inner wall of the protection groove 2 is fixedly connected with the adhesive layer 33, the top of the adhesive layer 33 is fixedly connected with the porous alumina layer 32, the top of the porous alumina layer 32 is fixedly connected with the electrolytic coloring layer 31, the porous alumina layer 32 is fixedly connected to the inner wall of the protection groove 2 through the adhesive layer 33, and an electrolytic coloring layer 31 is electrolyzed on the surface of the porous alumina layer 32. The porous alumina membrane 3 has a beautiful appearance and can protect the nitrogen oxide detection instrument without affecting its operation.

[0019] See also Figure 2 The porous alumina layer 32 has electrical insulation properties. The porous alumina layer 32 is a high-resistance insulating film with an insulation breakdown voltage greater than 30V / mm. The specially prepared high-insulating film even reaches about 200V / mm. The nitrogen oxide detector reflects the different concentrations of nitrogen oxides according to the size of the generated current. The porous alumina layer 32 will not enhance or weaken the current, and the current value will not be affected, thereby ensuring the accuracy of the nitrogen oxide detector data.

[0020] See also Figure 2 The porous alumina layer 32 has porosity and transparency, which facilitates the exhaust gas to enter the detection probe and fully react with the internal sensor to detect the nitrogen oxygen value. It will not partially isolate the exhaust gas and affect the nitrogen oxygen detection value. The use of the internal instruments can be directly observed, and the damaged instruments can be replaced in time to ensure the normal use of the nitrogen oxygen detector.

[0021] See also Figure 2 The electrolytic coloring layer 31 can be colored as needed, and the color can be selected according to the needs of customers, which meets the aesthetic requirements of customers and beautifies the appearance of the porous alumina membrane 3, which not only further enhances the market competitiveness of the product, but also more effectively exerts the function and use effect of the product.

[0022] See also Figure 2 The bonding layer 33 uses solvent-free glue. Solvent-free glue is a new type of glue that does not contain organic solvents, is very environmentally friendly, and will not cause harm to the user's body. In addition, the solvent-free glue has strong bonding strength. After applying the glue and maintaining a certain pressure for one to two hours, the material can be adhered. After three days of placement, the material can be cut, cut, planed, ground, drilled, and other subsequent processing.

[0023] Working principle: Apply adhesive to the inner wall of the protection groove 2, fix the porous alumina film 3 and the metal protection shell 1 together, the porous alumina layer 32 is fixedly connected to the inner wall of the protection groove 2 through the adhesive layer 33, and an electrolytic coloring layer 31 is electrolyzed on the surface of the porous alumina layer 32. The porous alumina film 3 has a beautiful appearance and can protect the nitrogen and oxygen detection instrument without affecting its operation. The porous alumina layer 32 is a high-resistance insulating film with an insulation breakdown voltage greater than 30V / mm. The specially prepared high-insulating film even reaches about 200V / mm. The nitrogen and oxygen detector reflects the different concentrations of nitrogen and oxygen according to the size of the generated current. The porous alumina layer 32 will not enhance or weaken the current, and the current value will not be affected, ensuring the nitrogen and oxygen detection. The accuracy of the detector data, the porous alumina layer 32 is porous and transparent, will not partially isolate the exhaust gas, affecting the nitrogen oxygen detection value, can directly observe the use of the internal instrument, can replace the damaged instrument in time, to ensure the normal use of the nitrogen oxygen detector, the electrolytic coloring layer 31 can be colored as needed, the color can be selected according to the needs of the customer, to meet the aesthetic requirements of the customer, the bonding layer 33 adopts solvent-free glue, solvent-free glue is a new type of glue, does not contain organic solvents, is very environmentally friendly, will not harm the user's body, and the solvent-free glue has strong bonding force, after applying the glue and maintaining a certain pressure for one to two hours, the material can be adhered, after three days of placement, the material can be cut, cut, planed, ground, drilled and other subsequent processing.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A porous aluminum oxide membrane for a nitrogen oxide sensor, comprising a metal protective shell (1), a protective groove (2) and a wire (4), wherein the metal protective shell (1) has a protective groove (2) on its surface, and a wire (4) is fixedly connected to one side of the metal protective shell (1), characterized in that: A porous aluminum oxide membrane (3) for protecting the metal protective shell (1) and the equipment inside it is fixedly connected inside the protective groove (2); The porous aluminum oxide film (3) comprises an electrolytic coloring layer (31), a porous aluminum oxide layer (32) and an adhesive layer (33); the adhesive layer (33) is fixedly connected to the inner wall of the protection groove (2); the porous aluminum oxide layer (32) is fixedly connected to the top of the adhesive layer (33); and the electrolytic coloring layer (31) is fixedly connected to the top of the porous aluminum oxide layer (32); The porous aluminum oxide layer (32) has porosity and transparency; the bonding layer (33) is made of solvent-free glue.

2. The porous aluminum oxide membrane for a nitrogen oxygen sensor according to claim 1, characterized in that: The porous aluminum oxide layer (32) has electrical insulation properties.

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