The effective sealing premise of oil coking oil pump and electric valve is unfavorable and favorable to the development of electric valve industry

The effective sealing premise of oil coking oil pump and electric valve is unfavorable and favorable to the development of electric valve industry

Tools Required Tools are required for removing the old root and replacing it with a new root, as well as pretightening the gland nut with a fastener. In addition, there is a constant need to use scale safety measures and to comply with relevant safety demarcations. Before installation, it is necessary to understand the following equipment: the cutting machine of the check disc ring, the check torque wrench or wrench, the safety hat, the internal and external caliper, the lubricants of the fastening device, the reflector, the disc pulling device, etc. Clean and inspect. Slowly loosen the gland nut of the stuffing box to release all residual pressure in the root assembly and remove any old root…

The effective sealing premise of heavy oil coal coke pump and electric valve

1. Tools to be used when removing the old root and replacing it with a new root, and pretighten the gland nut with a fastener. In addition, there is a constant need to use scale safety measures and to comply with relevant safety demarcations. Before installation, it is necessary to understand the following equipment: the cutting machine of the check disc ring, the check torque wrench or wrench, the safety hat, the internal and external caliper, the lubricants of the fastening device, the reflector, the disc pulling device, etc.

2, cleaning and inspection. Slowly loosen the gland nut of the stuffing box, release all residual pressure in the root assembly, remove any old root, and thoroughly clean the stuffing box of the shaft/rod; Inspect shaft/rod for erosion, dents, scratches or excessive wear; Check other parts for burrs, cracks and wear, which will reduce the life of the disc root; Botebon checks whether the stuffing box has excessive clearance, and shaft/rod eccentricity; Replacement of parts with major defects; Inspect the old root as a basis for failure analysis to find the cause of early failure of the root.

3. Measurement and recording. Record the diameter of the shaft/rod, the diameter and depth of the stuffing box, and the interval from the bottom to the top of the stuffing box when the oil seal ring is used.

4. Choose the dish root. Ensure that the selected disc root should meet the requirements of the system and equipment operating conditions; According to the measurement record, calculate the cross-sectional area of the disc root and the number of required disc root rings; Overhaul the root of the disc to ensure that it is free of defects; Before the installation of heavy oil coking oil pump, ensure that the equipment and disc root clean.

5. Preparation of the root ring. Braided coils are wrapped around entangled coils on an appropriately sized shaft, or a calibrated coil cutter is used; Cleanly cut the disc root to butt (square) or miter (30-45 degrees) as required, cut one ring at a time, and check the size with the shaft or stem.

Mold the root to ensure that the ring size fits the shaft or stem exactly. Cut the packing ring according to the root manufacturer’s handling guidelines or requirements if necessary.

6. Install the root of the disk. Carefully install one root ring each time, and surround each ring around the shaft or valve stem. Before installing the next ring, the heavy oil coking oil pump should make sure that the first ring is completely in place in the packing box. The next ring should be staggered and spaced at least 90 degrees apart, and the general requirement is 120 degrees. After the top ring is installed, tighten the nut by hand and press the gland down evenly. If there is an oil seal ring, it should be checked for accurate spacing with the top of the stuffing box. Also ensure that the shaft or stem can roll freely.

The unfavorable and favorable factors of the development of electric valve industry

Electric valve is an important mechanical device in production life, which is widely used in all walks of life. However, at present, the development of the electric valve industry in our country is unbalanced, under the good domestic environment and development prospect, there are many adverse factors. 1, favorable factors (1) The prospect of the “2016-2020 China valve industry investment analysis and prospect speculation speech” issued by the CIC staff said that with the perfection of electric valve technology, the use of electric valve field continues to expand, and the corresponding valve size is increasingly indispensable. Valve industry products have entered a period of innovation, not only the product types need to be updated and replaced, the enterprise internal management also needs to deepen according to the scale of the industry. With the pace of electric valve industry restructuring continues to accelerate, the competition between the valve industry in the future will be the competition between the quality and product brand of electric valve products, products will be developed to the direction of high technology, high parameters, strong erosion resistance, longevity. Domestic valve manufacturing industry in the huge demand environment, will also present a very good development prospect. Therefore, we need to make full use of the existing scale at the same time, look into the future, research out can be used in the future of the new scale and new system, so as to promote the development of valve technology at a higher level. (2) The chemical and energy industries have become the new growth points of the valve market. For a long time, the demand for electric valves in the energy industry has maintained a solid and stable growth rate. There are 2,679,030 MW of thermal and nuclear power plants under construction worldwide, 743,391 MW in the United States, and 780,000 MW of new power plant projects in the rest of the world, which will increase by 40% in the next few years. Europe, South America, Asia, especially China’s energy market will become a new growth point of the valve market. The chemical industry ranks in the industry with an output value of more than 1.5 trillion dollars and is also one of the larger demand markets for valves. The chemical industry needs mature design, high processing quality, rare materials of the industry valve. In recent years, the chemical market competition has become extremely fierce, many chemical manufacturers faced with competition have to reduce capital expenditure. 2, adverse factors (1) The lack of professional talents has become a bottleneck restricting the further development of the electric valve industry in our country. The development and growth of the valve industry is inseparable from the investment of high-quality talents. We should learn to allocate and apply talents scientifically, make the best use of things, people make the best use of talents, and pay attention to the cultivation of talents. The development of the industry is inseparable from the talent, how to ensure that the whole staff step team is not chaotic is every production operators should consider the topic. The development of The Times, the improvement of science and technology is highlighted as “new”, the continuous innovation can maintain the competitiveness of industrial development, can be everywhere, can have a better way out. (2) Fierce market competition electric valve is the product of low profit margin, the market competition is very fierce. At present, the Chinese electric valve industry is a labor-intensive industry, and the electric valve industry is still mainly based on the expansion of quantity. The foreign market is very active in recent years and the competition is fierce. East Asia and Southeast Asia’s electric valve import and export growth is rapid, North America’s European Community and other developed countries between the market business continued development, Germany, Italy, Japan, China and other countries and regions to expand exports, the United States, Britain, France and other countries to enter the rapid growth, formed the international valve market prosperity of the support point, moreover, because the world economy further internationalization, Multinational companies will continue to promote the development of international valve market, international business regionalization is bound to become another major feature. Although the international valve market activities produced in China more and more valve products, but the power of discourse in the international valve market is not in the hands of Chinese enterprises. (3) The product is backward and the development is unbalanced. The “2016-2020 China Electric Valve Industry Investment Analysis and long-term Speculation Speech” issued by the CIC Staff said that the improvement of the level and grade of the electric valve product is the primary issue for the future development of the electric valve industry in our country. The depression of entire electric valve industry, leads to the backwardness of valve products in our country, which is an important factor restricting the development of our valve products. Previously held “West to East gas transmission” project, many local valve enterprises have missed it. In addition to the environmental factors, some other factors, such as backward equipment and technology, low degree of specialization, small market size and other factors are also restricting the development of the valve industry bottleneck. For the domestic electric valve industry, there is also a large gap between the mainland and the coast. The starting point of the valve industry in the mainland is low, the scale is small, the degree of specialization is low, and the degree of marketization is not high, which widened the gap with the coastal area, but also led to the unbalanced development of the valve industry in the sea. (4) Bad competition There is bad competition in the industry. For example, the managers of the department renovate and refurbish the used valves and sell them for the second time after the refurbishment, which brings very serious safety risks to the project quality and severely disturbs the order and severity of the valve market.