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Metallurgical Automation 2009. National Metallurgical Automation Information Network column. ! Hey, the application of the flowmeter in measuring compressed air In 2008, the author participated in the installation and commissioning of the Rosemount 3051 flowmeter. I will write about some of my work experience for your reference.
First, you need to use the range ratio given by the instrument. Adjust the transmitter range to a smaller range allowed by its measurement accuracy while maintaining the same measurement accuracy. Since the turndown ratio is the ratio of the maximum range to the minimum range that the transmitter can measure when the transmitter meets the accuracy and repeatability requirements.
Therefore, the instrument adjusts the buckle to the ground when the process conditions change.
It is easier to change the measuring range of the transmitter. There is no need to change the instrument. Can reduce the number of stock spares. It is also easy to manage and prevent backlog of funds.
Then, on the premise that the warranty is installed correctly and the media parameters provided by the instrument supplier are correct. It is possible to operate normally under the conditions of the field conditions. Rosemount, the meter is a direct model of the 1295 Pana Numbar average tube and group valve and the Rosemount 3051 high precision differential pressure transmitter. Assembled in the body flowmeter. The 3051 flowmeter uniform velocity tube provides users with two options for non-checking and multi-point calibration during product design. Among them, the verification is carried out in the Dietrich Standards flow test room, usually in 1; 10 positions; 10 flow test points are tested in the range.
According to the test data, a flow curve composed of segment fold lines is stored in the instrument by a programming method. When the instrument is running, it can compensate for some nonlinear factors that cause the flow measurement accuracy to decrease. Therefore, the pre-compensation meter 255 can be as high as 1001 and this volumetric flow detection accuracy is monitored and adjusted for the actual flow and the operating range of the instrument is completed in the 51-letter protocol if used to measure steam. In addition to grasping the working conditions of each time period. It is also necessary to grasp the changes in the range of the instrument due to seasonal changes. The work is both meticulous and lengthy, causing many reasons why the meter cannot be measured normally. In the force flow and so on. However, when the instrument is supplied, the meter range in the calculation book provided by the factory is followed by the fact that the meter range given by the instrument manufacturer is too large, and the instrument cannot be measured normally after installation. After more than one month of on-site debugging data The analysis found that the differential pressure value range of the flow meter installed on the supervisor 04 was between 612; 1 and the condition of the pipe was omitted from the material of the differential pressure range. Adjust the transmitter range from 149 to 1,875. The flow range is from 150001 test week to 16825, 13 so that the supervisor and the managed data are in good agreement, successfully solving the problem that the instrument can not be measured normally. At present, the system has been running more than 1; The effect is satisfactory, and the development of the composite rolling plate of the roll composite rolling mill production monitoring system can not only save a large amount of rare precious metals. Moreover, it has the characteristics of each of the base layer materials, and can meet the special requirements of different environments and use conditions, and is widely used in the manufacture of large motor internal combustion engine bearing air pressure machine and refrigerator bearing military bullet casing. Shell shells, etc. Countries such as Anglo-American and Italian have an advantage in this production technology. The production methods include a casting method explosion composite method and a composite milk method. There are about a few enterprises in China that use the cold rolling composite method to produce, that is, the surface activation of materials. After rolling, it is bonded into a bimetallic component. The domestic roller composite rolling mill is a fully imported equipment. The process is more advanced by the underlying equipment. The controller of the top equipment rolling mill and the coiling equipment public auxiliary equipment is; 9030 with 2 remote stations 1 complete the logic sequence of the equipment. Speed ​​is given. The tension is given to the roll gap to set the thickness control function, the monitoring system is integrated with the operating system, the picture program is solidified, and the hardware dog user cannot analyze and modify and back up. In 2006, there were faults such as failure to start communication error and no data. Eventually crashed. The entire rolling line has no ftVii., 7EftHm; mvmwt, 7XT.iuiiiH auxiliary composite rolling process analysis and control program study. Anatomy of the monitoring system should be! 4 preparations. Successfully developed, the sun is bad. The 1st team 1 replaced the dedicated remote station and restored the normal production function. After the transformation, the thickness of the thickness gauge can be automatically controlled by the main screen. The unwinding tension is set. The heater power is set. The inlet is corrected and the main speed is set. The speed linkage adjusts the roll gap lifting bottle adjustment and the rolling machine working side and the transmission side level adjustment rolling mill jog adjustment. Servo stop and stop as well as roll gap and pressure monitoring. The sub-picture can be used for rolling parameter setting. The winder operates the top device to operate the bottom device operating device status monitoring car line start. 1 trend and calibration, etc.
A similar situation is still relatively large in China. This program has its own path. Abolish all types of dedicated hardware. The same effect is achieved by pure software. The data is fully open and fully shared, and some older production lines or recent core equipment are often caused by the failure of the monitoring station. Electricity. When the liquid is in good condition, it will be smashed or even broken. Very double; due to various factors such as intellectual property protection, the monitoring system of many production lines introduced in China or the man-machine interface of stand-alone equipment are dedicated, and the operating system is unknown. The communication protocol is unknown. The data format is unknown. Some even have controllers dedicated and the software is solidified. It is extremely difficult to prepare spare parts. In the case of Chapter 6, the loss is difficult to recover. In short, it is easier to prepare spare parts before the failure. Therefore, it is not possible to achieve the desired results.
Some online dedicated data acquisition cards or dedicated complete equipment are specially designed, and similar methods can be used to solve the problem of spare parts such as the acquisition of the industrial computer, the data and the dedicated network board for data reception and reception with 121314.
Now many domestic machinery and equipment are exported, and the core technology is properly protected.
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