Shenzhen Deep water Cage Technology Co., LTD. (hereinafter referred to as "deep water cage Company") is a company specializing in the design, manufacturing, installation and service of deep sea wave cage. Since the development of deep sea wave cage in 2000, it has participated in the manufacture of more than 2,000 deep sea wave cage, which escorts far-reaching Marine aquaculture.
As the only national high-tech enterprises in the industry, deep cage company to strengthen industry-university research cooperation and transformation of results, has developed a strong typhoon-resistant deep-sea cage, wave elimination system, automatic feeding machine system, fish collection system, etc., with a number of technical and invention special and obtained the national high-tech enterprise certificate, for the development of far-reaching Marine aquaculture in China to provide important equipment support.
Full participation in the development of China's deep water cage
China has a long coastline and abundant Marine resources, and mariculture plays an important role in Marine and fishery industry. With the deterioration of nearshore aquaculture environment, deep-water cage aquaculture has become a new growth point of mariculture industry, and equipment support is essential for Marine aquaculture. Feng Huiming, general manager of deep cage company, said: "Deep water cage industry is a high-tech industry that integrates a variety of high-tech, including the promotion and application of deep water cage and the upgrading of traditional cage, its development effectively promotes the technical transformation of traditional Marine aquaculture industry, updates people's business philosophy, and makes Marine aquaculture industry into a benign track of sustainable development."
Deep-water cage fish culture technology was previously invented by Norwegians, and it was not officially introduced in China until the beginning of this century. Previously, China's mariculture has been concentrated in the shallow water area within 15 meters of the offshore harbor, and the traditional floating row cage is used for aquaculture. Feng Huiming said: "That kind of frame resistance to wind and waves is poor, a typhoon day basically 'the whole army', fishermen's livelihoods can not be guaranteed, farming efficiency is difficult to improve." Moreover, the pollution of shallow sea aquaculture is not discharged for a long time, and the water quality is affected, which causes a certain pressure on the ecological environment of offshore sea, and restricts the healthy and sustainable development of Marine aquaculture in China.
Feng Huiming into the deep water cage industry, there is a story. Feng Huiming comes from a small mountain village in Hebei province, has never seen the sea since childhood, and has a persistent yearning for the ocean. After graduating from university, he came to Guangdong, this close contact with the sea, and tasted the delicious sea fish, the idea of living with the sea came into his heart. The summer weather in Guangdong is hot, he likes to go to the seaside after work, after a typhoon, he went to the seaside, saw the fishermen's simple floating nets were blown to pieces, hard to farm fish have long disappeared, heard the fishermen sigh when the day to rely on the sky to eat can improve, that scene let Feng Huiming unforgettable.
"By 2000, I heard that Norway had a cage that could withstand wind and waves, and by chance, the company I was in undertook the project of 'Guangdong Province Science and Technology Sea project - deep water cage development against wind and waves', which was later included in the national' 863 'plan." So I took the initiative to apply to join, became a member of the research and development of the project, and participated in the development of the deep water cage. Since then, my life has been indissoluble with these cages." Feng Huiming said.
Participated in the manufacture of thousands of weatherproof cages
The company has long carried out technical cooperation with the South China Sea Fisheries Research Institute of the Chinese Academy of Fishery Sciences (hereinafter referred to as the "South China Sea Institute"), Ocean University of China, Sun Yat-sen University and other scientific research institutions, and has broken through the equipment problems restricting the development of China's Marine aquaculture industry through continuous research and development. Feng Huiming himself also witnessed the development process of China's deep water anti-wind cage.
At that time, the South China Sea Institute and enterprises jointly developed a new generation of domestic deep-water wind and wave cage suitable for China's sea area. The cage is produced with HDPE high-density polyethylene raw materials, the typhoon resistance capacity reaches 12, the aquaculture water body with a circumference of 60 meters is more than 1500 cubic meters, the aquaculture output is more than 15,000 kilograms, the output value of a single box is 40 times that of traditional cages, and the economic efficiency has been significantly improved, and the formation of the research results of "deep water wind and wave cage equipment development and application". Since then, China's mariculture industry has also begun to stride into the deep sea.
Later, with the deepening of the research, the enhanced deep-water cage, lifting cage and other forms of cage equipment have been developed, and the production and installation process and method of China's deep-water cage system have been explored, and the technical problems of cage manufacturing, wind and wave resistance and installation have been solved. A number of key supporting equipment such as remote multi-channel automatic feeding system have been invented to solve the technical problems of mechanization and automatic control of deep-water cage farming. "At present, China has formed a unique deep-water windwave-resistant cage culture model, and developed a diversified deep-water cage culture digital management technology that integrates science and technology and modernization."
"The key to deep-water cage farming is mainly two points: first, the safety of the equipment, and the second is the farming technology." Feng Huiming introduced that the existing deep-water aquaculture equipment used in China is a circular cage produced by HDPE high-density polyethylene material. This material has two major characteristics, one is strong aging resistance, and the other is good toughness and long service life. According to the hydrodynamic characteristics of the deep water cage and the coordination relationship with the wave flow, the circular design of the cage is mostly used, which can effectively solve the technical problems of its structure and design parameters, and it is also necessary to master the hot melt welding technology and molding technology, and the installation and fixing technology of the sea anchoring.
"The cage must not only have a scientific design, but also in strict accordance with the technical requirements in the production, installation and other aspects of the construction, strict control." For example, the temperature and time of the pipe and components during welding, the tying knot of the anchor rope, the thickness, the weight of the fixed anchor, and the error in positioning will affect the quality and use of the cage. "Any small mistake in extreme sea conditions will cause the collapse of the entire cage, which is the so-called 'small difference'." Feng Huiming said. In order to test the actual use of making cages, Deepnet Co., Ltd. built 20 groups of 80 HDPEC43 deep-water cages in Shenzhen test base of Nanhai Institute as a breeding technology test, and carried out the breeding work of varieties of eggfish, mud fish and grouper, and achieved satisfactory results.
Deep Cage Company in the South China Sea to participate in the manufacture of more than 2,000 deep-sea wind and wave cage, the operation procedures and services have been very mature. Feng Huiming told reporters, "We will fully communicate with the customer before the construction of the cage, understand the requirements of the customer, survey the water flow, wave height and the surrounding environment, and design a suitable cage construction plan for the customer." After the customer is satisfied, we will have professional engineers to guide the installation on site, and every link will be strictly checked and approved to ensure the quality of the cage. After the installation of the cage, we will also organize personnel to conduct on-site explanation training on the performance, use instructions, precautions and other contents of the cage to ensure that customers can use the cage correctly. After the completion of the project, the company will regularly conduct quality visits to reply to customer questions. The cage has a free warranty period of 1 to 3 years, and the company will respond to the problem within 24 hours, and the company will provide preferential service and lifelong maintenance after the warranty expires.
Explore the high limit anti-typhoon cage scheme
Based on the sea conditions of the South China Sea, far-reaching Marine aquaculture has higher requirements for typhoon resistance indicators. Feng Huiming introduced that at present, the ocean conditions adapted to the cage in China are generally: Typhoon 14, wave height of 7 meters, flow rate of 1.5 meters/second; Individual Marine survival conditions with special requirements can be improved to: adapt to typhoon 17, wave height of 9 meters, flow rate of 1.5 meters/second. At present, most of the deep-water cage pipes used are hollow pipes to ensure the buoyancy of the cage frame, but this hollow design has a fatal characteristic, once there is a slight rupture, it will cause the whole frame to enter water and sink to the bottom.
In response to this situation, Feng Huiming looked for a lot of information, but also consulted a lot of industry experts, after countless studies and tests, and finally developed a technical solution that can enhance the rigidity of the frame, ensure the shape of the frame, and continue to use the deep water cage frame normally after the collapse of the frame pipe.
The deep water cage frame comprises an outer ring tube, an inner ring tube, a handrail tube and a connecting piece. In this scheme, foam strips should be filled in the cage pipe first to increase the buoyancy of the cage. The two ends of the ring tube are bound and fixed in the connecting piece. There are partitions inside the outer ring tube and the inner ring tube, and a closed air cabin is formed between the partitions. The ring tube is evenly distributed in the outer ring tube and the inner ring tube at six positions, and the Angle between each two adjacent ring tubes and the circle center of the ring tube is 60 degrees. The ring tube on each inner ring tube corresponds to the ring tube on the outer ring tube and is in the direction of the axis of the ring tube. At the same time, the connecting piece binds both ends of the ring tube along the axis direction of the ring tube, and the diaphragm is an elastic foam filler. After improvement, the fastness of the cage frame is increased, which can resist strong winds and waves, and after the pipe in the inner ring and the outer ring of the cage is broken, the air cabin of the pipe at the damaged place can still be used normally even if it is flooded, which improves the reliability and product safety of the product.
In the past, when installing cages in the vast sea because there is no reference, it is difficult to accurately install cages and anchors in the designated position, many cages are shifted due to the unbalanced force of the anchor position, this situation in the use of high-precision GPS positioning technology, the error is reduced by 2 meters, relatively accurate installation. "When operating, we will first place a pre-prepared buoy at the working point, and the length of the buoy rope is slightly longer than the water depth. Then the anchoring ship will have been connected anchor, anchor chain and rope in accordance with the anchoring point to throw off, after throwing a cage required three fixed anchorage with the ship to drag the cage frame to the predetermined sea area, and the anchor rope tied to the cage frame reinforcement assembly casing, during the period to adjust the rope tightness, so that all directions of the force is the same, so that a cage fixed. This can be repeated to complete the installation of multiple cages throughout the sea. In this way, the cage anchor position is balanced and can resist typhoon attacks."
Since 2011, the company has installed more than 500 wind and wave resistant deep water cages in the waters of Dawok Island, Erwok Island and Green Chau Island in Yangjiang, and they are currently operating normally, laying the foundation for the establishment of Yangjiang City deep sea cage industrial Park. In July last year, Yangxi was hit by typhoon "Siem ba", many deep water cages suffered devastating blows, but the situation in Yangjiang deep sea cages industrial Park is still good, including Feng Huiming led the construction of cages, in addition to the scientific site selection, cages standardized engineering technology and operation mode is also the reason for its survival.
Feng Huiming mentioned the four keys of the cage anti-typhoon: first, the cage specifications can not be too large, the larger the impact surface of the net by the waves and currents, the greater the force, "trees", especially in the open sea, the use of 120 meters or even 160 meters of deep water cage hydraulic impact projection area is large, the wind resistance area is large, and it is easier to be damaged in the typhoon; Second, the anchor, rope, frame, mesh must be matched, to scientific calculation, combined with experience, accurate matching, accurate installation, to strengthen the usual maintenance work; Thirdly, fish with a moderate capacity should be raised according to the volume of the cage. If the breeding density is too high, the impact between fish is more likely to be injured and killed when the typhoon disaster comes. Fourth, all materials of the cage must be real, and the installation and maintenance personnel are responsible.
We will carry out overseas cooperation under the Belt and Road Initiative
In addition to the domestic market, the company has also successfully brought technology and products to Brunei, the Philippines, Malaysia, Vietnam and other ASEAN countries, and established a number of deep-sea anti-wave cage bases overseas, becoming the builder of the new "maritime Silk Road".
In November 2014, Deep Cage Company and Philippines Palawan Aquaculture Co., Ltd. jointly established Palawan China-Philippines Cooperative Aquaculture Co., LTD., which has successively established cage aquaculture bases in Palawan, Davao and Colon of the Philippines, and vigorously developed deep-sea aquaculture, sales and import and export business. In order to promote the fishery cooperation between China and the Philippines, the company has donated 100,000 fish fry to the Philippines for two consecutive years, and organized training on breeding techniques. In the future, the company will increase close cooperation with the Philippine national fishery.
At present, the two sides are carrying out the China-Philippines modern fishery cooperation project, which includes cooperation, exchange and training in aquaculture technology, exchange of high-quality germplasm resources, breeding, breeding and marketing of East star spot, rat spot, lobster, various kinds of shellfish, blue crabs, algae and other high-grade seafood suitable for aquaculture in Philippine waters. It also includes the breeding and promotion of Chinese freshwater cultured fish such as Wuchang fish, mud fish, tilapia and bighead fish in the Philippines.
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