Nitrogen oxygen sensor with easy installation and maintenance

Abstract

The utility model discloses a nitrogen oxygen sensor convenient to installation maintenance, including installation threaded column, still including sensor probe installed on installation threaded column, the protective rubber sleeve of installation at installation threaded column one end, the protection subassembly of installation in protective rubber sleeve inside. Effectively resist the nut loosening of long -term vibration, avoid cable joint contact badly, guarantee detection data stable transmission, prevent tail gas emission control from being interfered with and equipment failure alarm, a plurality of array distribution's split pin makes spacing force even dispersion, avoids single stress point failure, further enhances the anti -vibration ability. And the overall structure does not need complicated tool, split pin plugs in and plugs out, and the operation of iron wire bending is simple and easy, and the installation and maintenance difficulty are reduced greatly. Meanwhile reduce intermittent friction at joint, cooperate with the influence of high temperature environment and relieve protection structure, delay cable core wire and joint wear and tear, significantly prolong the service life of sensor and cable, give consideration to use stability and operation and maintenance economy.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen and oxygen sensor technology, specifically to a nitrogen and oxygen sensor that is easy to install and maintain. Background Technology

[0002] A nitrogen oxide sensor is an electronic detection element installed on the exhaust pipe of a car or industrial equipment to detect the concentration of nitrogen oxides in the exhaust gas in real time. Its core function is to provide data to the engine or emission control system to adjust the combustion or reduction strategy and ensure that the exhaust emissions meet environmental standards.

[0003] In existing technologies, nitrogen oxide sensors are fixed with nuts during installation. However, in automobiles, nitrogen oxide sensors are constantly under vibration, which can cause the nuts to loosen. Loose nuts can lead to poor contact at the cable connectors, resulting in interrupted or inaccurate data readings and inaccurate nitrogen oxide concentration feedback. This can interfere with exhaust emission control and even trigger equipment malfunction alarms. Loose nuts can also cause intermittent friction at the connectors, and combined with the high-temperature environment around the sensor, this accelerates wear on the cable core and connectors, shortening the lifespan of both the cable and the sensor. Furthermore, if the nitrogen oxide sensor uses a rubber sheath to connect the cable, it is susceptible to environmental corrosion and cannot withstand the high temperatures, oil, coolant, and moisture in the engine compartment. The cable sheath will age and crack quickly, and the internal core will easily oxidize and corrode, directly causing cable malfunction. External impurities or moisture entering the cable can interfere with or even block the electrical signal, causing inaccurate or interrupted nitrogen oxide concentration detection data, thus affecting exhaust emission control and potentially leading to excessive emissions. Utility Model Content

[0004] The purpose of this invention is to provide a nitrogen oxide sensor that is easy to install and maintain, in order to solve the problem mentioned in the background art that the nitrogen oxide sensor in the car is in a state of vibration for a long time, which will cause the nut to loosen. The loose nut will cause poor contact of the cable connector, resulting in interruption or error of detection data and inability to accurately reflect the nitrogen oxide concentration.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen-oxygen sensor that is easy to install and maintain, including a mounting threaded post, a sensor probe mounted on the mounting threaded post, a protective sleeve mounted on one end of the mounting threaded post, a protective component mounted inside the protective sleeve, a limiting component threadedly connected to the mounting threaded post, a first connecting nut threadedly connected to the mounting threaded post, a limiting block fixedly connected to the first connecting nut, and a cotter pin inserted into the mounting threaded post. The cotter pin is engaged with the limiting block and inserted into the mounting threaded post. The cotter pin contacts the limiting block through an open wire.

[0006] In this preferred embodiment of the technical solution, a plurality of cotter pins are provided, and the plurality of cotter pins are arranged in an array on the first connecting nut.

[0007] In the preferred embodiment of this technical solution, the mounting threaded post has a pin hole at the corresponding position of the cotter pin, and the cotter pin is inserted into the pin hole.

[0008] In the preferred embodiment of this technical solution, a bendable wire is installed at the front end of the cotter pin, and the wire is wound around the limiting block.

[0009] Based on the preferred embodiment of this technical solution, the limiting component includes a first snap-fit ​​block fixedly connected to a first connecting nut, a second nut threadedly connected to a mounting threaded post, a second snap-fit ​​block mounted on the second nut, and a gas pipe connecting sleeve mounted on the second nut, the gas pipe connecting sleeve being threadedly connected to the nitrogen and oxygen delivery gas pipe.

[0010] In a preferred embodiment of this technical solution, the second snap-fit ​​block has a limiting groove at the corresponding position of the first snap-fit ​​block, and the first snap-fit ​​block snaps into the inside of the limiting groove.

[0011] Based on the preferred embodiment of this technical solution, the protective component includes a steel strip armor installed inside the protective sleeve, a rigid iron wire installed inside the steel strip armor, a copper strip shield installed inside the rigid iron wire, a ceramic body fixedly connected inside the copper strip shield, a conductor fixedly connected to the mounting threaded post, and filler material installed between the conductor and the insulating shield.

[0012] Based on the preferred embodiment of this technical solution, a number of heat dissipation holes are formed inside the ceramic body, and the number of heat dissipation holes are evenly formed on the ceramic body.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. Through the synergistic structure of the first connecting nut, cotter pin, and limiting block, the cotter pin is inserted into the corresponding pin hole of the installation threaded post, and then a bendable wire is wrapped around the limiting block to form a double anti-loosening fixation. This effectively resists nut loosening caused by long-term vibration, avoids poor contact of cable joints, ensures stable transmission of detection data, prevents interference with exhaust emission control and equipment malfunction alarms, and the array of cotter pins evenly distributes the limiting force, avoiding failure of a single force point and further enhancing vibration resistance. Furthermore, the overall structure requires no complex tools; cotter pin insertion and removal, and wire bending are simple operations, significantly reducing installation and maintenance difficulty. It also reduces intermittent friction at the joint, and the protective structure mitigates the effects of high-temperature environments, delaying wear on the cable core and joints, significantly extending the service life of the sensor and cable, and balancing operational stability with economical maintenance.

[0014] 2. The outer steel strip armor directly resists collisions and crushing impacts within the engine compartment, preventing damage to the internal conductors. The middle layer of rigid iron wire significantly enhances overall bending resistance, preventing cable breakage due to excessive bending during installation or use, effectively extending component lifespan. The ceramic body possesses excellent high-temperature resistance, precisely adapting to the high-temperature conditions around the exhaust pipe, and its evenly distributed heat dissipation holes quickly dissipate heat, preventing component performance degradation caused by high temperatures. The filler further enhances sealing and insulation, effectively preventing the intrusion of corrosive substances such as moisture and oil, protecting the internal structure. The inner copper strip shield isolates external electromagnetic interference, preventing electrical signal distortion. Combined with the heat dissipation holes ensuring the conductor operates at a suitable temperature, ensuring accurate data transmission for detection. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one embodiment of the nitrogen and oxygen sensor of this utility model that is easy to install and maintain; Figure 2 This is a schematic diagram of the threaded column structure of this utility model; Figure 3 This is a schematic diagram of the first connecting nut structure of this utility model; Figure 4 This is a schematic diagram of the protective rubber sleeve structure of this utility model; Figure 5 This is a schematic diagram of the protective component structure of this utility model.

[0016] In the diagram: 1. Sensor probe; 2. Mounting threaded post; 3. Protective rubber sleeve; 801. First connecting nut; 802. First snap-fit ​​block; 803. Second nut; 804. Second snap-fit ​​block; 805. Air pipe connecting sleeve; 806. Limiting block; 807. Cotter pin; 901. Steel strip armor; 902. Rigid iron wire; 903. Copper strip shield; 904. Ceramic body; 905. Insulating shielding tape; 906. Filler; 907. Conductor. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-5This utility model provides an embodiment of a nitrogen-oxygen sensor that is easy to install and maintain: it includes a mounting threaded post 2, characterized in that it further includes a sensor probe 1 mounted on the mounting threaded post 2, a protective rubber sleeve 3 mounted on one end of the mounting threaded post 2, a protective component mounted inside the protective rubber sleeve 3, a limiting component threadedly connected to the mounting threaded post 2, a first connecting nut 801 threadedly connected to the mounting threaded post 2, a limiting block 806 fixedly connected to the first connecting nut 801, and a cotter pin 807 inserted inside the mounting threaded post 2, the cotter pin 807 being engaged with the limiting block 806. The cotter pin 807 is inserted into the mounting threaded post 2. The cotter pin 807 contacts the limiting block 806 through the open wire. By inserting the cotter pin 807 into the mounting threaded post 2 and engaging with the limiting block 806, the open wire forms a double limiting fixation, effectively preventing the first connecting nut 801 from loosening in the vibration environment of the equipment, and ensuring the stability of the connection between the sensor and the mounting part. At the same time, the plug-in structure of the cotter pin 807 can be disassembled and assembled without complicated tools. Combined with the threaded connection of the mounting threaded post 2, it greatly simplifies the installation and maintenance process of the sensor and reduces the difficulty of operation.

[0019] Please see Figure 3 A further solution based on this embodiment is as follows: a plurality of cotter pins 807 are provided, and the plurality of cotter pins 807 are arranged in an array on the first connecting nut 801. By arranging the plurality of cotter pins 807 in an array on the first connecting nut 801, the limiting force is evenly distributed in the circumferential direction of the first connecting nut 801, avoiding the problem of fixation failure caused by force concentration on a single cotter pin, and further improving the vibration resistance of the connection structure; at the same time, the arrangement of multiple sets of cotter pins forms redundant protection, so even if individual cotter pins are damaged, the remaining cotter pins can still maintain the fixation effect, extending the service life of the connection structure and ensuring the long-term stable operation of the sensor.

[0020] Please see Figure 3 A further solution based on this embodiment is as follows: the mounting threaded post 2 has a pin hole at the corresponding position of the cotter pin 807, and the cotter pin 807 is inserted into the pin hole. By opening a pin hole on the mounting threaded post 2 at the position corresponding to the cotter pin 807, a precise installation positioning reference is provided for the cotter pin 807, ensuring that the cotter pin 807 can be quickly and accurately inserted and aligned with the limiting block 806, thereby improving installation efficiency. At the same time, the tight fit between the pin hole and the cotter pin 807 can limit the circumferential rotation and axial displacement of the first connecting nut 801, enhance the firmness of the connection, and avoid the risk of loosening due to installation deviation.

[0021] Please see Figure 3A further solution based on this embodiment is as follows: a bendable wire is installed at the front end of the cotter pin 807, and the wire is wound around the limiting block 806. By setting a bendable wire at the front end of the cotter pin 807 and winding it around the limiting block 806, a detachable rigid connection is formed between the cotter pin 807 and the limiting block 806. This not only prevents the cotter pin 807 from accidentally falling off, but also allows for disassembly without damaging the components. At the same time, the bendable wire structure is adaptable to limiting blocks of different sizes, enhancing the versatility of the structure. Moreover, the operation is simple, requiring no professional tools, further improving the convenience of maintenance.

[0022] Please see Figure 2 A further solution based on this embodiment is as follows: The limiting component includes a first snap-fit ​​block 802 fixedly connected to the first connecting nut 801, a second nut 803 threadedly connected to the mounting threaded post 2, a second snap-fit ​​block 804 installed on the second nut 803, and a gas pipe connecting sleeve 805 installed on the second nut 803. The gas pipe connecting sleeve 805 is threadedly connected to the nitrogen-oxygen delivery gas pipe. By setting the limiting component composed of the first snap-fit ​​block 802, the second nut 803, and the second snap-fit ​​block 804, a double threaded limiting structure is formed with the first connecting nut 801, which can effectively share the force of the first connecting nut and prevent wear caused by long-term force on a single threaded connection. At the same time, the threaded connection between the gas pipe connecting sleeve 805 and the nitrogen-oxygen delivery gas pipe realizes the integrated installation of the gas pipe and the sensor, avoiding loosening or leakage caused by separate installation of the gas pipe and the sensor, simplifying the overall installation process, and improving the sealing performance of the exhaust gas detection.

[0023] Please see Figure 2 A further solution based on this embodiment is as follows: the second locking block 804 has a limiting groove at the corresponding position of the first locking block 802, and the first locking block 802 is locked inside the limiting groove. By opening a limiting groove on the second locking block 804, the first locking block 802 is precisely locked inside the limiting groove, forming a circumferential limit, which effectively prevents the first connecting nut 801 and the second nut 803 from rotating relative to each other in a vibration environment, and further improves the stability of the connection structure.

[0024] Please see Figure 4-5A further solution based on this embodiment is as follows: The protective component includes a steel strip armor 901 installed inside the protective sleeve 3, a rigid iron wire 902 installed inside the steel strip armor 901, a copper strip shield 903 installed inside the rigid iron wire 902, a ceramic body 904 fixedly connected inside the copper strip shield 903, a conductor 907 fixedly connected to the mounting threaded post 2, and filler 906 installed between the conductor 907 and the insulating shield 905. By setting up a multi-layered nested protective component, the steel strip armor 901 provides mechanical protection to resist damage to the internal conductor from external collisions and compression. The rigid iron wire 902 enhances the bending resistance of the protective structure and prevents the cable from breaking due to excessive bending. At the same time, the copper strip shield 903 can effectively isolate external electromagnetic interference and ensure the stability of the electrical signal transmitted by the conductor 907. The filler 906 improves the sealing and insulation of the component and prevents water vapor and oil stains from entering. The ceramic body 904 has good high temperature resistance, is suitable for the high temperature environment around the exhaust pipe, and extends the service life of the cable.

[0025] Please see Figure 4-5 A further solution based on this embodiment is as follows: a plurality of heat dissipation holes are formed inside the ceramic body 904, and the plurality of heat dissipation holes are evenly formed on the ceramic body 904. By evenly forming a plurality of heat dissipation holes inside the ceramic body 904, the heat dissipation area of ​​the ceramic body is increased, the internal heat is dissipated more quickly, and the performance of the ceramic body 904 is prevented from being degraded due to excessively high temperature caused by the high temperature environment around the exhaust pipe. At the same time, the heat dissipation holes allow air to circulate inside the ceramic body, further improving the heat dissipation efficiency, ensuring that the conductor 907 works at a suitable temperature, ensuring the stability and accuracy of signal transmission, and the evenly distributed heat dissipation holes do not affect the structural strength of the ceramic body, thus taking into account both heat dissipation effect and mechanical protection performance.

[0026] Working principle: The steel strip armor 901 and rigid iron wire 902 resist mechanical damage such as collisions and bending in the engine compartment. The copper strip shield 903 isolates external electromagnetic interference and avoids signal distortion. The filler material 906 seals and insulates, preventing water vapor and oil from entering and corroding the conductor. The ceramic body 904 dissipates heat quickly through evenly distributed heat dissipation holes, adapting to the high-temperature environment of the exhaust pipe and ensuring that the conductor transmits electrical signals at a stable temperature. In the installation and fixing process, the threaded post 2 is connected to the equipment exhaust pipe through threads. After the first connecting nut 801 is tightened, the cotter pin 807 is inserted into the corresponding pin hole. Its front end can be bent iron wire is wrapped around the limit block 806 to form double fixation and prevent vibration from causing the nut to loosen. At the same time, the second nut 803 is engaged with the limit groove of the first locking block 802 and the second locking block 804 to further lock the first connecting nut 801 and prevent circumferential rotation. The gas pipe connecting sleeve 805 realizes the sealed connection between the nitrogen and oxygen delivery gas pipe and the sensor to ensure stable flow of the detected gas.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nitrogen-oxygen sensor that is easy to install and maintain, including a mounting threaded post (2), characterized in that: It also includes a sensor probe (1) installed on the mounting threaded post (2), a protective sleeve (3) installed at one end of the mounting threaded post (2), a protective component installed inside the protective sleeve (3), a limiting component threaded to the mounting threaded post (2), a first connecting nut (801) threaded to the mounting threaded post (2), a limiting block (806) fixedly connected to the first connecting nut (801), and a cotter pin (807) inserted into the mounting threaded post (2). The cotter pin (807) is engaged with the limiting block (806), the cotter pin (807) is inserted into the mounting threaded post (2), and the cotter pin (807) contacts the limiting block (806) through the open wire.

2. The nitrogen-oxygen sensor that is easy to install and maintain according to claim 1, characterized in that: A number of cotter pins (807) are provided, and the cotter pins (807) are arranged in an array on the first connecting nut (801).

3. The nitrogen-oxygen sensor that is easy to install and maintain according to claim 1, characterized in that: The threaded post (2) has a pin hole at the corresponding position of the cotter pin (807), and the cotter pin (807) is inserted into the pin hole.

4. The nitrogen-oxygen sensor that is easy to install and maintain according to claim 1, characterized in that: The front end of the cotter pin (807) is fitted with a bendable wire, which is wound around the limit block (806).

5. The nitrogen-oxygen sensor that is easy to install and maintain according to claim 1, characterized in that: The limiting assembly includes a first snap block (802) fixedly connected to a first connecting nut (801), a second nut (803) threadedly connected to a mounting threaded post (2), a second snap block (804) mounted on the second nut (803), and a gas pipe connecting sleeve (805) mounted on the second nut (803), the gas pipe connecting sleeve (805) being threadedly connected to a nitrogen and oxygen delivery gas pipe.

6. The nitrogen-oxygen sensor that is easy to install and maintain according to claim 5, characterized in that: The second snap-fit ​​block (804) has a limiting groove at the corresponding position of the first snap-fit ​​block (802), and the first snap-fit ​​block (802) snaps into the inside of the limiting groove.

7. The nitrogen-oxygen sensor that is easy to install and maintain according to claim 1, characterized in that: The protective assembly includes a steel strip armor (901) installed inside the protective sleeve (3), a rigid iron wire (902) installed inside the steel strip armor (901), a copper strip shield (903) installed inside the rigid iron wire (902), a ceramic body (904) fixedly connected inside the copper strip shield (903), a conductor (907) fixedly connected to the mounting threaded post (2), and filler (906) installed between the conductor (907) and the insulating shield (905).

8. The nitrogen-oxygen sensor that is easy to install and maintain according to claim 7, characterized in that: The ceramic body (904) has several heat dissipation holes inside, and the several heat dissipation holes are evenly distributed on the ceramic body (904).

Images