China General Machinery Industry Association Valve Branch recently introduced relevant parties, China's annual turnover of the valve market as high as 500 billion yuan, but there are more than 100 billion yuan of the market occupied by foreign valve companies, to change this situation, to improve the quality of the valve The essential. Valves occupy a large proportion of mechanical products, according to statistics from industrialized countries abroad, the output value of the valve is the sum of compressors, fans and pumps, accounting for about 5% of the total output value of the machinery industry. At the same time, as an important part of major technical equipment, especially in electric power, petrochemical, metallurgy and urban water supply and drainage systems, valves play a key role and are extremely heavy. At present, there are about 6,000 valve enterprises in our country, of which 900 have an annual output value of more than 5 million yuan. According to reports, there are currently three domestic valve companies listed, that nuclear technology, Hongcheng shares, Guangdong Pearl. Last year, CNRT main business income 235 million yuan, Hong Cheng shares main business income 146 million yuan, Guangdong Pearl main business income 150 million yuan. These enterprises, no matter their scale or product quality, are unable to compete with their foreign counterparts at present. Analysis of the industry, resulting in the current passive valve market in our country there are two main reasons: First, domestic valves and imported products than there is still a gap, the quality needs to be improved; second, some users are not aware of the localization, and even artificially set the threshold so that Domestic enterprises in the bidding with foreign companies difficult to win the bid. Relevant experts believe that the current production of our country's various valves generally widespread leakage, internal leakage, the appearance of quality is not high, short life, inflexible operation and valve electric devices and pneumatic devices unreliable shortcomings, some products are only equivalent to International standards in the early 1980s. Therefore, to develop the valve industry, the urgent need to develop new high-tech products. Valve industry should vigorously adopt international standards and advanced foreign standards, and strictly implement the existing national standards, the existing product reform, so that the updated products can reach the international standards of the 1990s. At the same time, the valve industry should take effective measures on raw material selection, casting process, forging process and heat treatment of castings and forgings so that the castings and forgings roughs reach the international standard on the intrinsic quality and appearance quality. On the other hand, should continue to carry out internal and external leakage research, strict mechanical processing technology, vigorously promote new sealing materials, improve the accuracy of key parts of the product, extend the service life of the valve so that the phenomenon of a short two leaks have been fundamentally improved. Throughout the domestic market, the valve industry has a broad space for development. According to the experts forecast, the valve market in the future mainly in the power industry, petrochemicals, fertilizers, environmental protection and urban construction and other industries. They assert that who has good technology, who has excellent quality, who can continue to develop new products, who will be able to get ahead in the fierce market competition, come to the fore.
Transfer trolley, an motor driven factory transport vehicle. It has the advantage of simple structure, easy maintenance, large carrying capacity and less pollution. Widely used in machinery manufacturing and metallurgical plant, cooperate with cranes to transport heavy loads inside workshop. They can be divied in many different types as shown below:
· KPT type transfer trolley is powered by the cable laid on the ground directly. For its simple structure, the price is more competitive. While the distance is often limited in 100 meter.
· KPJ type transfer trolley is powered by the cable from the cable reel. With the cable reel, the moving distance is improved to 200 meter compared with the KPT type.
· KPX type transfer trolley is powered by the storage battery, more flexible and safe. While the capacity and the duty group are all affected by the storage battery. Especially, the price and the life span of the bettery is also an important issure.
· KPC type transfer trolley is powered by the slide wire along the rail, so the moving distance is unlimited. The slide wire is the key point and also the weakest link.
· KPD/PKDZ type transfer trolley is powered by the low voltage DC power from the rail. Powered by the rail, the system is more reliable compared with the KPC type; The sytem is also more complicated and expensive.
Transfer trolley
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