Drying and drying industries at home and abroad have been continuously developing at a high speed in recent years. Of course, the dryer manufacturers who are constantly making technological innovations are indispensable, but fundamentally speaking, market demand is the inexhaustible driving force for its development. According to a statistical survey, China is already a major manufacturing country for dryers. Countries all over the world are importing a large number of Chinese products, and among the mechanical products exported from China, the majority of dryers have been manufactured. Although in the current cold economy, the machinery industry has suffered a lot, but the output is second only to the United States, and exports have surpassed Germany. China has always been dubbed as the world's largest manufacturing country, and when it became the “Chinese creation†that attracts worldwide attention. It is the great mission that domestic dryer companies shoulder.
Domestic dryer manufacturers should increase scientific research to change the low-profit sales status. From the development of dryers in the past ten years, despite the rapid development, the exported products are not high in technological content, but because of low prices, most of the users are South African generation. High-end advanced dryer products also need to rely on foreign countries. High-efficiency production lines also need to be introduced from abroad. Therefore, the higher the cost of drying and drying equipment that is produced with high efficient automation factor, the higher the cost. If we only export some low-end products, it will still be detrimental to our country. According to a statistical survey, China consumes 40% of the world's materials, but its sales revenue only accounts for 12%-15% of the world's total, while foreign dryer-related industries have a gross margin of around 40%. Therefore, China produces dryers. The profits of the manufacturers are very low and some of them are still losing money. Therefore, China should still increase its efforts in research and development of dryers. During the period when this non-renewable resource is becoming increasingly scarce, we should, as in foreign developed countries, focus on sales technology and low-end products as secondary models.
Krah Pipe
The performance characteristics of the HDPE winding structure wall tube are as follows:
1. The hot state of winding forming welding joint quality is high.
The flat material belt and U-shaped material belt extruded from the mouth die of the extruder in the melting state are evenly wound on the heated roller die according to the predetermined position, which ensures the quality of the fusion joint of the structure wall tube. In particular, in the structural design, the melt joint of the flat material belt is covered by a polyethylene-coated supporting tube, which improves the overall resistance to the external pressure of the product.
2. Good connection quality.
The pipe connection with excellent installation performance adopts the
embedded electric fuse in the socket with the same material socket welding
connection technology. It can achieve zero leakage, ensuring the same life span of the pipeline system and the safety of operation. At the same time, because the product under the condition of the same application as other tubes light weight, and is easy to transport, construction is convenient and quick, and can reduce the construction cost, in the range of applications, without a concrete cushion layer and concrete jaasiel groove can directly apply the tube after qualified, basically, stay do under excavation, side tube, while backfilling, simplifies the construction procedures, shortening the time limit for a project. During the project acceptance, the closed-air test is used instead of the closed-water test, which not only speeds up the acceptance but also saves the complicated work and a lot of test costs in the closed-water test
3. Good flexibility
High-density polyethylene winding structural wall pipe has macro flexibility, and the micro pipe section has strong rigidity and overall resistance to external pressure.
when used under heavy load road surfaces, it can ensure the safety of traffic. Due tothe flexibility of the pipe, it can also reduce the damage loss of the pipe to the minimum in the event of an earthquake, uneven surface settlement, and other geological activities. These characteristics improve the seismic mitigation ability of public facilities.
4. HDPE can be recycled, The main raw material of winding structure wall pipe
is green environmental protection products, such as high-density polypropylene, which doesn`t have any toxicity. There is no dye in the production process. The used pipeline can be 100% recycled. It is a green product of environmental protection.
5. Corrosion resistance, aging resistance, and service life span can be up to 50
years.
High-density polyethylene has the ability to resist chemical corrosion and
erosion. Therefore, when the winding structure wall pipe is conveying corrosive fluid or laying in corrosive soil, it does not need anti-corrosion treatment, and its performance is much better than other pipes. The product in the design process, chooses a reasonable product structure form, to ensure the service life span of the plastic pipe is more than 50 years, and no maintenance is needed in the life span.
6. Tube inner wall roughness, large water transfer around the structure of the
wall tube. Product inner wall roughness N is about 0.010, so the transmission of fluid has lower friction, compared to other products such as cement pipe with a similar diameter the water transfer is greatly improved. Therefore, the smaller HDPE tube can replace the larger cement pipes. In application, under the same conditions, using a wall pipe winding structure can have better reliability compared to the traditional pipe material. The comprehensive benefit is obvious, especially in the narrow construction site, high building density, underground pipeline, complicated traffic busy roads, and acid soil.
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