From October 21 to 24, 2024, the Russian Chemical Industry Exhibition KHIMIA was held in grand style. This far-reaching international chemical industry exhibition is hosted by the Russian International Exhibition Center and is strongly supported by the Russian Ministry of Industry and Trade, Ministry of Energy, Ministry of Science and Technology, Russian Chemical Union and other government departments. Its history can be traced back to 1965. After 58 years of development and precipitation, it has become a world-renowned event in the chemical industry.   During the exhibition, the booth carefully built by Noying became the focus. The company fully demonstrated the strong advantages of its three core product series: level instruments, pressure transmitters, and flow meters. The booth was very lively, with chemical, environmental protection, and equipment manufacturing companies from Russia, Belarus, Turkey and other countries flocking to the booth. Many international peers had in-depth and fruitful exchanges at the Noying booth. These exchanges not only covered technical discussions and product consultations, but also included communication of potential cooperation intentions, building a solid bridge for exchanges and cooperation in the international chemical industry.   This exhibition marks that Nuoying has taken a solid step on the road of international market expansion, injecting new vitality into its layout and development in the global chemical industry, and also making positive contributions to the coordinated development and exchange and integration of the international chemical industry. I believe that in the future, Nuoying will continue to show its style on the international stage and reap more cooperation results.

The High-end Instrument Application and Innovation Development Forum and the 2024 Measurement/Control Instrumentation Conference were successfully held in Xi'an, Shaanxi. On October 26, the High-end Instrument Application and Innovation Development Forum and the 2024 Measurement/Control Instrumentation Conference were held in Xi'an, Shaanxi Province.     The forum was rich in content and invited many heavyweight participants such as design institutes, high-end users, academicians and experts to exchange and discuss topics such as the localization research and development and application of automation instrumentation equipment, and the promotion of enterprise digital transformation and upgrading by intelligent automation technology in the form of academic sharing forums and technical salons.     Shaanxi Nuoying Automation Instrument Co., Ltd. was invited to attend the conference. General Manager Li Junrong led the R&D technical team to attend the meeting. They discussed and exchanged views with many industry experts on topics such as high-end instrument applications, high-end, intelligent and green development of manufacturing.     As a well-known manufacturer in the field of domestic automation instruments, Nuoying has not forgotten its original intention for 15 years, focusing on user needs and continuing to focus on the research of safety instrument technology. In the future, Nuoying will continue to innovate and provide first-class products and high-quality services to help fine chemicals, pharmaceutical chemicals and other companies produce smarter, more efficient and safer!

Antenna scarring ，The antenna is submerged ， Probe scaling and scarring   Radar level meter is a highly reliable, non-contact measuring instrument. It is precisely because of the characteristics of non-contact measurement that the instrument is not in direct contact with the measured medium. To a certain extent, the problem of inaccurate measurement or even impossible measurement caused by the pollution and corrosion of most plug-in instruments is avoided. Nevertheless, due to the precise and complex structure of the radar level meter, if it is operated improperly or lacks maintenance in application, it will also lead to frequent instrument failures and affect normal measurement. So, what are the common problems of radar level meter? What are the solutions? Generally speaking, there are three common problems in the measurement of radar level meter: 1、 Antenna scar of radar level meter Common problems: generally, the phenomenon of material hanging with low dielectric constant has no effect on the instrument measurement in dry state, but the phenomenon of material hanging with high dielectric constant often leads to inaccurate measurement results. Solution: in view of this situation, it is recommended to use compressed air purging or clean water flushing to remove the hanging of materials. If the scarring is stubborn, use acid cleaning solution to clean the alkaline scarring dirt in time, but stop measuring the material level during the cleaning. 2、 The antenna of radar level meter is submerged Common problems: the antenna of the radar level meter is easy to be submerged by materials, affecting the measurement effect and easily causing damage to the probe. Solution: it is suggested to change the radar level meter to guided wave tube measurement, which can improve the measurement conditions and improve the measurement performance of the instrument. The specific method is to install a guided wave tube type radar level meter at the original opening, and the guided wave tube is about 0.2m higher than the exhaust pipe. In this way, even if the slurry overflows from the exhaust pipe, the antenna of the level meter will not be submerged by the slurry, and the interference of the stirrer vortex and a large amount of steam emerging from the probe are avoided, reducing the damage to the probe. At the same time, because the guided wave tube has a good focusing effect, the received radar wave signal is stronger, Good measurement results have been obtained. 3、 The probe of radar level meter is scaling and scarring Common problems: when the probe of the radar level meter is scaling or scarring, the electromagnetic wave signal of the radar level meter is blocked, which is easy to cause the radar level meter failure Solution: it can be avoided by raising the installation position of the probe. If it cannot be improved due to the installation conditions, it should be solved by interlocking the measured value of the material level with the pump of the tank, specifically reducing the set value of the highest material level by about 0.5m. When the material level reaches the highest value, the feed pump can be stopped or the discharge pump can be started. In addition to the failure of radar level meter caused by the blocking of the above electromagnetic wave signal, the normal measurement of radar level meter may also be affected by the medium form. For example, if there is foam on the surface of the tested material in actual working conditions, if it is dry foam or wet foam, the radar wave can reflect normally. However, if the foam is too thick and sticky, the measurement error may be large or it cannot be measured. If this is the case, the radar level meter does not have measurement advantages, and it is recommended to replace the measuring instrument. Therefore, generally speaking, if the measurement data of the radar level meter is inaccurate, it can be basically judged that the cause of the fault is that the electromagnetic wave signal is blocked due to some influence and is not transmitted to the actual level surface. The instrument staff are responsible for timely handling the common faults of radar level meter, and are more obligated to pay attention to proper maintenance of the instrument at ordinary times, so as to ensure the normal and safe use of the instrument.  

Reasons for error of radar level meter 1: Measurement dead zone: The output of radar level meter in measurement is 4 ~ 20mA current. Due to the measured medium itself and the probe, there are two dead zones in its measurement, namely upper dead zone and lower dead zone. The minimum distance that can be measured between the liquid level in the upper dead zone and the upper reference point is about 0.1M ~ 0.5m; The lower dead zone is the part at the bottom of the probe where the measurement results do not change with the change of the real liquid level in the storage tank.   2: Error caused by measured medium:   When measuring the boundary, it is required that the dielectric constant of the upper liquid must be 10 greater than that of the lower liquid. If the dielectric constants of the two interfaces are not much different, they will become wave patterns. During measurement, since the time taken for the liquid level and the boundary is basically the same, the two returned signals will overlap and affect the measurement results.   3: The measured liquid viscosity is too large:   The medium has a high viscosity. Such liquid medium is likely to adhere to the probe, affecting the transmission of signals and causing errors in measurement. If the viscosity is higher, the medium will be connected with the probe. At this time, the probe must be cleaned regularly.   4: Error of radar level meter itself:   The radar level meter adopts radar technology, and most of the errors come from the installation on site.   5. Radar echo anomaly caused by rough inner wall of waveguide   The installation requirements of radar level meter with waveguide are relatively high, especially the smoothness of the inner wall of waveguide. It is recommended that the waveguide be made of stainless steel, and the plug-in welding method shall be adopted when the waveguide is welded.   In order to effectively avoid these possible problems, precautions should be taken when installing radar liquid level meter:   1. When installing the radar liquid level meter, the feed inlet, feed curtain and vortex shall be avoided, because the false echo with amplitude much larger than the effective echo reflected by the measured liquid level will be generated when the medium is injected. At the same time, the irregular liquid level caused by the vortex will scatter the microwave signal, thus causing the attenuation of the effective signal, so we should avoid them;   2. For vessels with agitators, the installation position of radar liquid level gauge should not be near the agitator, because irregular vortex will be generated during mixing, which will cause attenuation of radar signal. At the same time, the blades of the stirrer will also cause false echoes to the microwave signal, especially when the relative dielectric constant of the measured object is small and the liquid level is low, the influence of the stirrer is more serious;   3. When the radar liquid level gauge is used to measure the liquid level of corrosive and crystallizable objects, in order to prevent the influence of the medium on the sensor, the manufacturer generally adopts the structure with polytetrafluoroethylene measurement window and separation flange. The temperature of these parts shall not be too high, and the temperature of polytetrafluoroethylene shall be 200 ℃. In order to avoid the influence of high temperature on the radar antenna and prevent the crystal on the diaphragm from affecting the normal operation of the instrument, a safe distance of at least 100-800mm is required between the flange end face and the high liquid level.

Troubleshooting Methods of Radar Level Gauge Radar level meter plays an irreplaceable role in solid dust measurement. Jining Tongchuang Instrument Co., Ltd. is committed to the production of radar level meter and level meter with a dedicated attitude. Made a certain summary of the common problems of radar level gauges, and solutions and skills to solve some problems encountered Tongchuang radar level meter has the advantages of small level measurement dead angle, high continuous wave measurement accuracy, little influence by the characteristics of the measured medium, wide measurement range, high temperature resistance, strong high pressure capability and non-contact measurement method. The coal industry has been widely promoted and applied. Due to the complex environment of the measured object, the high temperature, high pressure and high corrosion, as well as the serious influence of dust, vibration, steam and many other reasons, the radar level meter frequently fails, and the technicians maintain a large amount of the instrument, which seriously affects the production equipment. Therefore, it is necessary to understand the daily failure problems of radar level gauges and their solutions. The following has sorted out the troubleshooting methods of the radar level gauge for you, hoping to help you. The first point is to check whether the power supply of the radar level gauge is normal. If it is found at the production site that the radar level gauge changes very slowly after the material level rises to a certain value, you should immediately check whether the power supply of the radar level gauge is normal, and the relevant staff should also check the radar level gauge in detail during daily maintenance. The power-on condition, whether there is normal output after power-on. If the material level changes slowly or does not change at all, it is necessary to check whether the fuse of the equipment is burned out at the first time. If there is no current output, it can basically be judged that there is a problem with the instrument, and it should be replaced or repaired according to the situation. In addition, the relevant personnel also need to strengthen the daily maintenance work, and conduct regular outages for maintenance, so as to ensure the normal operation of the radar level gauge instrument. The second point is that the antenna is stained and crystallized When the lightly polluted oil tank fails, the possibility of antenna contamination and crystallization should be considered first. The solution is to wear suitable protective equipment after the power is off, remove the radar and put it down tilted, and wipe off the dirt or crystals with a rag. Do not bend or damage the antenna, handle it with care, and avoid scratching with iron to avoid damaging the antenna skin. Check whether the communication equipment is normal The third point, the use temperature In order to make the Tongchuang radar level gauge measure normally, it should be ensured that the internal temperature of the radar level gauge is lower than 50°C. Generally speaking, radar level gauges are used to measure high temperature media. Therefore, the outer casing of the radar level gauge is made of materials with strong heat resistance. If the internal electronic components exceed this value, ice water must not be used for cooling. Even the radar level gauge will be paralyzed. A small amount of wind can be blown into the radar head with a copper pipe to scientifically reduce the internal temperature of the radar level gauge. Fourth, the system displays an error message The system of the radar level gauge often displays error messages. Generally, the cause of this failure is that the power supply is cut off before the end of data storage, and it is necessary to perform a calibration reset and re-calibration. If the alarm still sounds after the calibration is reset and re-calibrated, the electronic module of the radar level gauge needs to be replaced.​​ The fifth point, diffuse reflection If the material level is low or there is no material level, the reason for the large ZUI may be that there are brackets and pipes at the bottom of the test container, or steam is generated during the process, which causes diffuse reflection to the radar wave and causes the material level to fail. After the process level is normal, restart it and it will automatically recover. The diffuse reflection caused by the steam caused by the radar level gauge will automatically recover when the temperature is normal.    

                         Radar level meter will solve 6 common problems in key technology With the rapid development of my country's industry, the industrial level has been continuously improved, and the level of science and technology has also been improved, which has also continuously driven the development and progress of related industries. Among them, the level instrumentation industry is the most typical representative. With the advent and popularization of radar level meter, the product has gradually occupied a large part of the market share with its own obvious product advantages, and won the recognition of more and more customers. Of course, in addition to the product guarantee of the radar level gauge itself, what is more important is that the radar level gauge will solve six common problems in key technologies. In response to this problem, the technical engineer of the R&D Department of Beijing Huibo Xinrui Technology Co., Ltd. said: First of all, it is necessary to know that the radar level meter is mainly suitable for the level measurement of various containers, storage tanks, warehouse materials and other materials with complex process conditions, and it is also suitable for particles. And the level of dust can be continuously measured by contact, especially in complex environments with dust and volatile substances, and it is not affected by changes in the physical properties of the measured medium. And about 6 common questions about key technologies: One is that emerging sensor technology, as the basic element of sensor network, will have very broad development prospects in the future. The second is: functional safety technology and safety instrumentation are new technologies developed recently in the world. The purpose is to prevent abnormal accidents in industrial facilities, which endanger the safety of people and equipment. Functional safety technology and safety instrumentation are problems that need to be solved in the future. The third is: the gap between my country's high-end and high-end testing equipment and foreign countries is largely the gap between precision machining and special process technology. The current focus is on the development of precision machining technology and special process technology. The fourth is: analyzing the functional components and application technology of the instrument to improve the stability and reliability of the whole instrument, and at the same time, the spectrum and database for different application fields. The fifth is: intelligent technology with self-calibration, self-test, self-diagnosis and self-adaptive functions. The last point is: at present, we should focus on the development of seamless connection and integration technology between control systems of different manufacturers; project management technologies such as project planning, design, organization, procurement, acceptance, and commissioning that major suppliers of automation equipment for large-scale projects should possess. To sum up, it is not without reason that the radar level meter can successfully seize the broad market of level measurement after its introduction. more prominent contributions. It will also become an irreplaceable essential product in level measuring instruments.