The product must not be reversed. The surface to be passivated by the 6.4 tilting cleaning must be pre-coated; open all container valves and systems, rinse with water, remove all metal debris and ash. In order to avoid the surface being scratched, please do not rub the test surface with any matter. 6.5 Liquid mixing method Pickling and passivating solution is prepared according to this method; the general container can be sprayed with a rotating cleaning ball to make all The processing method of the small container is to fill the container with the cleaning liquid; when cleaning the large container with the rotating cleaning ball, the experiment should be carried out first to ensure that the entire surface can be uniformly contacted with the cleaning liquid, as long as the effective method of f is available; The system is cleaned by pumping the cleaning fluid into the system to make it completely clean. A temperature probe should be installed at the end of the piping system, and a temperature inspection should be performed every minute.
6.6 Dipping liquid temperature 4 hours 3 minutes, minutes to wash off the washing solution, wash with deionized water 6.7 pickling chemical components nitric acid and hydrofluoric acid formula first with 10 nitric acid plus 25 hydrofluoric acid weight percentage before use diluted with water .
The operating procedure uses ash at 2313 cycles (4) at room temperature for 5 hours for 1 hour to release the acid wash solution, which is called water washing. Stand up to the final from the neutral 6.8 passivation chemical composition nitric acid formula with deionized water to prepare 8 nitric acid 131 operating procedures, in the 23131 circulating tank at room temperature for 5 hours 1 hour to drain the acid wash, wash with water until the final 1 Neutral 7 system disinfection and sterilization 7.1 water injection production line must be passed through the disinfection and sterilization sequence before delivery. 7.2 water injection production line process still tank end filter 0.227 filling 7.3 pure steam into the thick tank distribution tank High tank, time 7.4, the pure steam is introduced into the pipeline system for 3, 1!
the above. Receive, period 2 to 07 liquid soft start device in the application of 550Nm3 plus ill air compressor Hunan Chemical Vocational and Technical College 412004 Dai Yanming Lijun Pharmaceutical 1 limited liability company Weng Chaochen motor. The direct start of high-voltage high-power AC motor will be generated in the engineering design of 55-sport air compressor. The air compressor will drag a large inrush current. For the power grid with short-circuit capacity, it will cause the power grid to use the German top company 22, Jia 61 is high. The voltage difference of the voltage is different, which affects the normal operation of the electrical equipment of the system. Therefore, from the comprehensive evaluation of technical economic reliability, the liquid soft starter with excellent cost performance is selected as the first choice for the 22 motor 稂 start and weaving , 3 liquid soft starter working principle and scheme The liquid soft starter resistor is a liquid resistor prepared by water and electrolyte, the conductive principle is ion conductive. The conductivity of ion conduction increases with temperature, and its temperature sensitivity varies with electrolyte element and concentration. The resistance of liquid resistance is good plasticity. The concentration of electrolysis is changed to change its resistivity, and its adjustable range is large.
2.3 AC variable frequency starting and speed regulation This mode is high-efficiency starting and speed regulation mode. It can realize starting and speed regulation by changing the frequency and voltage of the stator end of the motor. The speed regulation range is high precision, high efficiency, high energy saving effect and strong characteristics, but The technology is complex, and the maintenance and repair level is high. Especially for high-voltage motors, the investment is large and the payback period is long. From a practical point of view, it is not suitable for high-pressure unit starting.
2.4 Solid-state soft-start solid-state soft starter is also said to have developed with the technology in recent years. Its performance is superior, and it adopts various functions such as micro-power-limited current limiting pump control to ensure small protection and reliable operation. However, the high pressure is especially low, the cost is high, and the investment recovery period is long.
2.5 liquid soft start B series pressure AC 屯 æ¶²æ€ æ¶²æ€ è¯¥ 该 该 该 该 该 该 该 该 该 该 液体 液体 液体 液体 液体 液体 液体 液体 液体 液体 液体 液体 液体The starting current is 3 times that of the small factory to start 3 times, and the liquid resistance is automatically removed after starting. The high degree of operation is reliable, and the investment is only for solid-state electronic soft-starting, especially for power-saving, soft-starting electric power technology, with a full, volume and manufacturer's start, suitable for soft start.
Time can be according to the color flow, can be continuous 1 automatic process 3 device ◎ 巳 isolation switch port host running circuit breaker heart motor start circuit breaker K electro-hydraulic variable resistance starter, 122 proportional motor M2 change the static and dynamic plate spacing motor 4 Operation effect 4.1 Actual starting curve; 矣, now optimizes the starting curve of the whole 耵 附录 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如 如It can be seen from 2 that the voltage drop at start-up is only about 880, and the starting current is about 880, which is more than half of the current at 2010 when starting at full-voltage starting.
4.2 Operation effect 4.2.1 The starting current is small, which greatly reduces the insulation and structural damage of the machine.
4.2.2 The starting performance of the motor is improved, the inrush current is small at the start, and the fluctuation of the power supply grid is small, which improves the quality of the power supply.
4.2.3 The starting current of the mountain factory is small, which can increase the load of the main transformer. Effectively prevent overloading due to overload during motor starting. Affect the system supply.
Received date 2004抒05 Weighing sensor use and maintenance Weibei Pharmaceutical Co., Ltd. 234000 Zhao Cuiling due to the rapid development of electronic information technology, China's weighing machine towel machine, the analog to electronic conversion. The scorpion scale is mainly based on the electric strain finder principle, and a large number of resistance strain gauge load cells are used. The load cell is the frontier of electronic information technology. If there is no reliable acquisition and conversion of the original information by the sensor, reliable measurement is difficult to achieve. Under the blood, we use the electronic strainer resistance strain 1 resistance strain type weighing sensor use characteristics ambient temperature has different effects on different levels of sensors. The ambient temperature of the sensor using the field and the inspection operation is very different. Therefore, when the user finds that the sensor has excessive temperature drift during use, measures should be taken to create a local relatively constant temperature environment around it.
Zero point changes caused by overload and eccentric load. In use, if the force applying plane and the supporting base surface are not working, the eccentric load condition will be bad. Overload or partial load can cause large plastic deformation in a certain section of the elastomer. The point will suddenly become larger and the local stress will exceed the strength limit, which will cause damage to the sensor.
Zero point change caused by electromagnetic field interference. If the space electromagnetic field in the field suddenly impacts or changes, causing a considerable amount of induced potential on the bridge network or signal transmission line, the sensor output will fluctuate. 2 Fault diagnosis and analysis in the use of the electronic scale fault phenomenon always The terminal of the system is small. You should first determine the fault to measure which part of the system. The following methods can be used to check the installation status of the mechanical device, to eliminate mechanical failures; to check whether the cable is injured by shaking; to open the intermediate junction box, and use each to detect the working state of each sensor to determine whether a certain sensor is faulty.
Use the above method to narrow down the fault range, find out the fault sensor and keep abreast of the fault occurrence. Therefore, the faults caused by the sensors are often related to the operational use or mechanical assembly abnormalities.
3 Precautions for use 1 Grounding of the grounding station should consider the influence of the smashing of the load and the lightning; the screen sleeve and the casing are grounded to ensure that the sensor itself has a stable zero potential; the weighing platform prohibits the long-term placement of heavy objects to prevent transmission. The susceptor produces creep; the system should be checked frequently for any irregularities.
4 Conclusion Electronic weighing weighing sensor has achieved rapid development in recent years, and various electronic weighing instruments have become the leading weighing equipment. In recent years, our company has purchased more than 100 electronic weighing instruments. The weighing sensor is the key part of the electronic weighing instrument. In order to reduce or eliminate the fault of the sensor, in addition to the manufacturer to increase the strength of the sensor receiver, it is also very important for the user to modify the site environment, improve the operation method, and pay attention to maintenance.
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