了解仪器仪表行业，是自动化领域的关键行业。 Orifice flowmeters understand the instrumentation industry and are a key industry in the field of automation. In the past few years, with the continuous development of China's automation application environment, the appearance of the instrumentation industry is changing rapidly, and many companies in this field have also developed rapidly. At present, the instrumentation industry is facing a new period of development. The twelfth five-year plan (draft) of this industry also proposes several key technologies for key development according to the requirements of the new period, which undoubtedly has important guidance for the future development of the industry significance. Emerging sensor technology As the basic element of the sensor network (Internet of Things), the sensor will have a very broad development prospect in the future. At present, new sensor technologies include solid-state silicon sensor technology, fiber-optic sensor technology, biochip technology, gene chip technology, image sensor technology, all-solid-state inertial sensor technology, and multi-sensor technology. The twelfth Five-Year Plan will focus on smart sensors to tackle key technical problems. In this field, we focus on the development of new principles and new effects of sensing technology, sensor intelligence technology, sensor network technology, miniaturization and low power consumption technology, as well as the design, manufacture and development of sensor arrays and multifunctional, multi-sensor parameter sensors Packaging technology. Industrial wireless communication network technology As a supplement to the wired industrial communication network, the industrial wireless communication network has been generally recognized. China has achieved certain results in industrial wireless communication networks. Continued development will likely lead the world in orifice flowmeters in this regard. In this field, we should focus on the formulation of industrial wireless communication network standards and industrial wireless communication network certification technologies. Functional safety technology and safety instrumentation 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 endangers the safety of people and equipment. 这项技术及相关仪表产品已经获得用户的广泛关注。 Orifice flowmeter technology and related instrument products have received wide attention from users. China's large petrochemical engineering construction projects have stipulated that functional safety assessment must be performed in advance. There are frequent accidents in China's industrial facilities. It is of great significance to study the safety instrumentation technology. The key products in this field include the development and application of control systems that achieve overall safety level SIL3, temperature transmitters, pressure / pressure differential transmitters, electric actuators / valve positioners, and safety instrument system evaluations. Development of technical method research and assessment tools. The gap between precision machining technology and special process technology in China's high and mid-range inspection equipment and foreign countries is largely the gap between precision machining and special process technology. The current focus is on multi-dimensional precision processing technology, precision molding technology, spherical and aspherical optical component precision processing technology, crystal optical component grinding technology, special optical film design and preparation technology, precision grating scribe reproduction technology, special welding and bonding Special sintering technology, special chip processing technology, MEMS technology, automatic micro and trace sample analysis and processing technology, etc. Analytical instrument functional components and application technology are key components of analytical instruments, such as detectors, quadrupoles, high-pressure pumps, valves, magnets, special light sources and power supplies, automatic samplers, long-life high-sensitivity electrodes, medium-step gratings, Key components such as high-precision electronic extensometers have been developed to improve the stability and reliability of the entire machine. At the same time, the orifice plate flowmeter develops spectra and databases for different application fields.
At present, the most commonly used differential pressure type flow measurement is used in industrial measurement. The mainstream products of differential pressure type are saving type (orifice flowmeter, Venturi tube, etc.) and dynamic pressure head type (average speed tube). Flow measurement using differential pressure principle is the most classic and reliable flow detection method in the engineering field today. The differential pressure flowmeter is based on the differential pressure of the flow detection device installed in the pipeline, the known fluid premise, and the detection component and the pipeline. Geometry to account for flow. The differential pressure type flowmeter is composed of a primary installation (testing piece) and a secondary installation (differential pressure conversion and flow display instrument). Differential pressure type flowmeters are classified by detection means, such as orifice flowmeters, venturi flowmeters, and averaging tube flowmeters. The larger the pressure difference that occurs in the flow detection element in the pipeline, the better the selection and cost of the differential pressure transmitter, and the better the measurement accuracy. However, because the flow measurement installation usually selects a shortening ratio (orifice, nozzle) based on the size of the flow, the problem of adding pressure loss also occurs when the differential pressure is improved. The addition of eternal pressure loss in the pipeline makes it necessary to add pipeline power. This requires high-power fans, pumps, etc., which adds power consumption and adds to the operating cost of the entire system. The representative product of the differential pressure flowmeter is the orifice plate flowmeter. Because people are very familiar with its equipment, operation, and maintenance, and the orifice plate is easy to replicate, simple and sturdy, the function is not reliable, the application is long, and the price is low. , So it has been used for a long time. 运用工夫一长，精度会急剧下降，需求进行按期检测和清洗。 However, as long as the orifice plate flowmeter is used for a long time, the accuracy will drop sharply, and regular inspection and cleaning are required.