On May 20th, the reporter saw in the warehouse of the finished product workshop of the plastics factory of Daqing Petrochemical Company that a long-distance truck truck just filled with cargo was preparing to sail to Dalian Port. According to the warehouse administrator, in the past few days, HPR18H10AX grades of metallocene polyethylene products have been shipped to the warehouse while being transported. Currently, the product has been shipped to 1,420 tons, and the factory volume is as high as 120 tons.

It is understood that after Daqing Petrochemical Company launched the first batch of 2,700 tons of metallocene polyethylene on the market last year, its good performance was praised by customers in the northeast, north, south and east China regions. In order to better meet customer aspirations and increase the economic efficiency of enterprises, Daqing Petrochemical plans to enlarge production of 10,000 tons this year.

Metallocene polyethylene is a new product developed by Daqing Petrochemical Company in 2007 that has independent intellectual property rights and fills the gaps in the country. Its appearance is 2 to 5 mm milky white round particles. The product has excellent optical performance, sealing performance and impact resistance. It is mainly used for high-strength packaging film, and can also be used for composite film sealing layer, wire and cable, hoses, foam materials and polyolefin modifiers. produce. At present, the production and development of domestic metallocene products is still in its infancy, there is no large-scale industrial production, and it can only rely on imports.

In order to complete the production tasks of high-value-added new products put into the market in large numbers, Daqing Petrochemical Plastics Factory carefully prepared and summed up experience, starting from the aspect of product driving, production control, analysis and processing of abnormal phenomena, and implemented the catalyst feeder with cold. , catalyst refining nitrogen pipeline renovation and other projects, the cooler has taken high-pressure water cleaning, pressure, plugging and other measures to ensure the heat transfer effect and improve the control accuracy. At the same time, an anti-caking emergency treatment measure was formulated, which effectively solved over a dozen technical problems such as unstable weighing of the weighing scale and poor discharge valve. The production plant achieved a successful drive on April 30. The product melt flow rate was stably controlled at 0.15 to 0.25 g/min, and the density was 0.917 to 0.923 g/cc. The product quality pass rate reached 100%.

It is reported that Daqing Petrochemical Company's metallocene polyethylene products have been successfully scaled up. While improving the market share and product competitiveness, Daqing Petrochemical Company has also resolved the dependence on import of high-pressure low-density polyethylene (LDPE) packaging film materials. Only meet the self-needs can reduce imports of 1,500 tons per year, saving nearly 15 million yuan.

Pneumatic Solenoid Valve

Solenoid valve is an industrial equipment controlled by electromagnetism. It is an automatic basic component used to control fluid. It belongs to actuator. Pneumatic solenoid valve is one of them. It blocks or leaks different oil drain holes by controlling the movement of valve body. The oil inlet hole is normally open, and hydraulic oil will enter different oil drain pipes, Then the oil pressure of the pneumatic solenoid valve pushes the piston of the oil cylinder. In this way, the mechanical movement of the whole solenoid valve is controlled by controlling the current of the electromagnet of the pneumatic solenoid valve.

Characteristic

It can work normally under vacuum, negative pressure and zero pressure, but its diameter is generally less than 25 mm.

It can also operate under zero pressure difference, vacuum and high pressure, but it has high power and must be installed horizontally.

The upper limit of fluid pressure range is high, which can be installed arbitrarily (need to be customized), but the condition of fluid pressure difference must be met.

Principle editing voice

There is a closed cavity in the pneumatic solenoid valve, and there are through holes in different positions. Each hole of the pneumatic solenoid valve leads to different gas pipes. There is a valve in the middle of the cavity and two electromagnets on both sides. The valve body will be attracted to which side when the magnet coil is electrified;

The pneumatic solenoid valve blocks or leaks different exhaust holes by controlling the movement of the valve body, and the air inlet is normally open. High pressure gas will enter different exhaust pipes, and then push the piston of the cylinder through the air pressure of the pneumatic solenoid valve. In this way, the mechanical movement of the whole solenoid valve is controlled by controlling the current of the electromagnet of the pneumatic solenoid valve.

Operation principle of pneumatic solenoid valve

We said the pneumatic solenoid valve working position (solenoid valve on or off), in fact, refers to the pneumatic solenoid valve spool position.

Pneumatic Solenoid Valve, Pneumatic Air Solenoid Valve, Electronic Solenoid Air Valve

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