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radiator led energy-saving lamps
Led energy saving light radiator on the market today are generally divided into two, one is aluminum CNC turning from, the other
is a zinc-aluminum alloy ingot mold is made of casting. Led lamps in Japan\\ s top science and technology development as well as a
cooling fan cooling modules.
About 80-90W/MK thermal conductivity of cast zinc-aluminum alloy shell plus subsidiary oxide residues, and surface fuel injection
or plating treatment, almost the actual thermal conductivity of aluminum alloy AA1070 cast led bulb The light, die-casting fins
very thick, which resulted in the cooling area is very small, is not conducive to heat.
Aluminum alloy 6063-T5, about 180-190W/MK its excellent thermal conductivity, heat sink can be very thin, only 1 mm, the unique
thermal and structural design, maximizing heat dissipation area, this product at room temperature able to maintain long-term
work, the cup body temperature below 50 ℃, in order to effectively reduce the led the process of using the light fades, ensure
better lighting quality.
Show the cooling fan that can break through the bottleneck of the led bulb light, led downlight 9W, led light bulb to reach 15W.
The led light bulb heat dissipation module has three innovative design: the fans of two-way operation of auto-dust design, patent
barrier ring design prevents hot air reflow, as well as meet the high quality quiet cooling design. The sound quality and
psychoacoustic parameters to simulate human binaural hearing experience, people almost feel less than the cooling fan rotation.
The cooling fan is also scheduled to launch antipyretic 7-15W ,10-25W, 25-40W three LED heat dissipation module, and is widely
used led bulb lights, LED downlights and other kinds of LED application products, thermal solution.
hydraulic control valve Classification and working principle
The pressure control valve use is divided into the relief valve, pressure reducing valves and sequence valves. Relief valve
(1): able to control the hydraulic system when the set pressure is reached to maintain a constant state. Relief valve for overload
protection known as the safety valve. When the limit value of system failure, the pressure that may damage the valve port open the
overflow, in order to ensure the safety of the system. Pressure reducing valve (2): depression than the main loop oil and stable
pressure control branch circuit. It controls pressure reducing valve can be divided into a fixed value of pressure reducing valve
(output pressure to a constant value), fixed differential pressure reducing valve (input and output pressure difference value) and
fixed ratio pressure reducing valve (between input and output pressure to maintain a certain percentage). (3) action after
sequence valve: make an actuator (such as hydraulic cylinders, hydraulic motors, etc.), and then the order so that the actuator
action. Pump pressure of the first to promote a movement of the hydraulic cylinder, the area A through the sequence valve in the
inlet role, when the hydraulic cylinder a movement entirely into pressure, the role of the upward thrust of the area A is greater
than the spring adjustment fixed value, the spool rise to the port connected to the inlet and the oil hydraulic cylinder movement.
The flow control valve to adjust the spool and the valve orifice area and its local resistance to regulate the flow, so as to
control the speed of movement of the actuator. The flow control valve use is divided into five kinds. The throttle (1): it is set
orifice area, little changes in the load in the pressure and the implementation of the sports uniform low velocity components
remained essentially stable. (2) control valve: pressure change in the load can maintain throttle pressure drop for a given value.
Thus, in the orifice area it is set, regardless of the load pressure of changes in the control valve can maintain constant flow
through the throttle valve, so that the implementation of the components of velocity stability. (3) diverter valve: regardless of
load size, make two of the same oil source implementation of the components equal flow for the same amount of shunt valve or
synchronization valve; traffic pro rata for the proportion of shunt valve. On the contrary, (4) set flow valve: the role of the
diverter valve to flow into the set flow valve pro rata. (5) diversion set flow valve: both the shunt valve and set flow valve two
functions. The directional control valve use is divided into one-way valve and the valve. One-way valve: only allow one-way
connected to the fluid in the pipe, the reverse is cut off. Valve: change pass, breaking the relationship between different
piping, based on the control channel in two-pass, three links, Stone, according to the working position of the spool in the valve
body, two, three, etc.; The five-way; points spool drive motor, electric, manual, hydraulic. All ports when the spool is cut off,
the actuator does not move; when the spool to right, P and A through B and O pass; when the spool is moved to the left, P and B
through A and O pass. In this way, the actuator can be positive, the reverse movement.
What is the international competitiveness of Chinese heavy machine
Today, the competitive landscape of the world s heavy-duty machine tool manufacturing industry has significant changes, mainly highly concentrated at the manufacturer s product technical level to gradually narrow the gap, and highlight the needs of individual users.
In recent years, with changes in market demand, heavy-duty domestic machine tool enterprises highly competitive manufacturers from several developed into dozens of products improve very quickly, and gradually narrow the gap with foreign products. China s heavy-duty machine tool industry is facing new opportunities, and attaches great importance to world counterparts. Since the 1990s, from the change of the heavy-duty machine tool market in the world, abroad with heavy machine tool manufacturers have converted doors. German heavy machine manufacturing industry, has called the world s leading level due to the prolonged recession of the world machine tool market and recession, Germany Heath, Coburg waiting to name manufacturers as an independent market main competition no longer exists heavy machine competitors are relatively weak . When the forward to the heavy and chemical industries, national policy to revitalize the equipment manufacturing industry will further stimulate the market demand, the world s largest machine tool consumer market.
Meanwhile, China is gradually integrating into the world economic integration process, and abroad with businesses have to invest in China and build factories. China has become the world s largest plant, equipment, basic industries, should have good prospects for development. Coupled with heavy machine technology has become mature and is being gradually narrowed the gap with the level of foreign advanced technology, most of the products to meet user needs. Domestic manufacturing capacity has entered the world, foreign manufacturing capacity for heavy-duty machine tool manufacturers are being eroded.
Over the years, heavy machine tools abroad to enter the Chinese market, mainly Germany, Italy. By the downturn of the world machine tool market, heavy German machine tool manufacturing industry is gradually moving towards a recession, merger or closure of some of the world-famous enterprises have all been. Italy, however, heavy machine tool enterprises in support of government subsidies in recent years has developed rapidly, a great alternative to the trend in Germany. The development of heavy-duty machine tool manufacturing industry in Spain is really impressive, domestic enterprises will undoubtedly pose a certain threat. Therefore, in the future competition in the market, heavy machine tool enterprises in China faced international competitors from Germany, Italy and Spain.
Imports of heavy machine tools, the vast majority, high-grade digital products, including Germany and Italy more on behalf of the world advanced level. Difference in the structure of domestic products and foreign products is not large, the use of new technology is almost the same, the biggest difference is the speed of the core transmission parts, precision and reliability, as well as the entire machine tool manufacturing process level and quality, which is foreign the biggest advantage of the product. Domestic manufacturers despite the technology is slightly behind the international advanced level, but have great advantages in manufacturing capacity and price, especially the ultra-heavy-duty machine has reached the international advanced level.
The heavy-duty domestic machine tool manufacturers a strong manufacturing capability, but a large but not the main reason or processing equipment is backward, NC rate is very low, especially the lack of the level of high-precision processing equipment. Meanwhile, domestic enterprises, the prevalence of lack of capacity for independent innovation, because the market demand characteristics of small quantities of heavy machine sheets, determine the demanding technological innovation.
Heavy-duty domestic machine tool manufacturing industry to catch up with the level of foreign advanced technology, to strengthen the independent innovation, precision manufacturing "concept, to accelerate the pace of independent innovation, changing domestic product behind foreign deficiencies can not always followed behind the others to imitate; strengthen fine manufacturing, to improve the level and quality of the product manufacturing process, including a variety of features and related component parts, which is two fundamental guarantee for the manufacture of CNC machine tools, so that the heavy machine made in China into the international market as soon as possible, enhance the international competitiveness.
In addition, an important factor to affect the international competitiveness of China s heavy machine is more and more heavy-duty domestic machine tool manufacturers, both domestic-funded enterprises, joint ventures, as well as mergers and foreign-funded enterprises of the name manufacturers, the competition has become intense, a new round of market reshuffle is simmering.
Non-woven bags (commonly known as non-woven bag)
Is a green product, tenacious durable, attractive appearance, good ventilation, reusable, washable, can be silk screen
advertising, use of a long, suitable for any company in any industry as advertising, gift purposes. A non-woven bag more economic
effects of order, issued to start from the limit of plastic, plastic bags will begin to gradually exit the items packaging market,
replaced by a non-woven shopping bags can be used repeatedly. Non-woven bags compared to plastic bags, printed pattern, more vivid
color expression. Can be coupled with repeated use, can be considered more attractive than a plastic bag in the non-woven shopping
bags with designs and advertising, because the repeated use of the attrition rate is lower than the plastic bags, woven shopping
bags but more cost and more obvious advertising effectiveness. Two more solid traditional plastic shopping bags non-woven bag, in
order to save costs so thin material, easily damaged. However, in order to make him more firmly bound to be all the more it costs.
Solve all the problems in non-woven shopping bags, woven shopping bags, toughness, and easy to wear. There are a lot of laminating
non-woven shopping bags, with a solid addition, more waterproof, feel good, beautiful shape, a little bit. Although individual
cost compared with plastic bags up a little, but the life of a non-woven shopping bags arrived in hundreds, even thousand of the
tens of thousands of plastic bags. Three non-woven bag more publicity effect of advertising is a pretty non-woven shopping bags,
not only just a commodity bags. Its beautiful appearance more attractive, the embodiment of simple fashion shoulder bag, the
street a beautiful landscape. With its solid, waterproof, sticky characteristics will become the first choice of customers to go
out in such a non-woven shopping bag, can be printed on your company s logo or advertising, it brings the effect of advertising It
goes without saying, the real small investment into a large return. Four non-woven bag more environmentally friendly public value
to limit the issuance of plastic, is to solve the environmental problem. The capsized use of non-woven bags, greatly reducing the
waste into pressure. With the concept of environmental protection, and better able to reflect your corporate image, and close to
the people of the effect. The potential value more than money can be replaced. Release start from the plastic limit, and plastic
bags will begin to gradually exit the items packaging market, replaced by a non-woven shopping bags can be used repeatedly. Non-
woven bags compared to plastic bags, printed pattern, more vivid color expression. Can be coupled with repeated use, can be
considered more attractive than a plastic bag in the non-woven shopping bags with designs and advertising, because the repeated
use of the attrition rate is lower than the plastic bags, woven shopping bags but more cost and more obvious advertising
effectiveness. Traditional plastic bags, shopping bags, in order to save costs so the material is thin, easily damaged. However,
in order to make him more firmly bound to be all the more it costs. Solve all the problems in non-woven shopping bags, woven
shopping bags, toughness, and easy to wear. There are a lot of laminating non-woven shopping bags, with a solid addition, more
waterproof, feel good, beautiful shape, a little bit. Although individual cost compared with plastic bags up a little, but the
life of a non-woven shopping bags arrived in hundreds, even thousand of the tens of thousands of plastic bags. A beautiful non-
woven shopping bags, not just a commodity bags alone. Its beautiful appearance more attractive, the embodiment of simple fashion
shoulder bag, the street a beautiful landscape. With its solid, waterproof, sticky characteristics will become the first choice of
customers to go out in such a non-woven shopping bag, can be printed on your company s logo or advertising, it brings the effect
of advertising It goes without saying, the real small investment into a large return.
The core technology of highpower chips
As a green energy saving LED lighting industry, is becoming a new industry to competition for global capital. 19, the reporter learned from the quality supervision department, following the local standard of LED street lighting, then there are a series of
industry-standard introduction.
Relevant person in charge of the Hubei Provincial Bureau of Quality Supervision, said that these standards will cover the upstream and downstream industry chain, from the high-power chips and other core technology, LED lighting, energy-saving
performance assessment. In the development of national industry standards, the province will be given more right to speak.
Hua Fen, East Lake High-tech economic development, Deputy Secretary, Optical Valley has been the initial formation of new light industrial belt, gathered Foxconn, Optical Valley Electronic Di source, optoelectronics, a number of LED R & D and production
enterprises with independent intellectual property core chip research and development capacity. Optical Valley LED lighting output this year expected to exceed 20 billion yuan.
Industrial scale up to 50 billion the Donghu new light industrial planning, four years later, the formation of the 2-3 output value of over 10 billion light source enterprise groups, 5-8 the output value of billions of dollars companies.
Chemical valve material selection – CITIC valve
All along, the chemical equipment corrosion is one of the most headache hazards, the slightest mistake, ranging from damage to the device, while the accident and even lead to disaster. According to relevant statistics, the destruction of chemical equipment is about 60% is due to corrosion caused by the selection of science in chemical valve selection first thing to note. Usually there is a misunderstanding, that stainless steel is universal, regardless of what the media and environmental conditions, is offering a stainless steel valves, which is very dangerous.
Below for some commonly used chemical media to talk about the selection of the main points:
Sulfuric acid
As a strong corrosive medium, sulfuric acid is use a very wide range of important industrial raw materials. Different concentration and temperature of sulfuric acid corrosion of the material concentrated sulfuric acid concentration above 80%, the temperature is less than 80 ° C, carbon steel and cast iron has good corrosion resistance, but it is not suitable for high-speed flow of sulfuric acid not suitable for the material of the valve; ordinary stainless steel such as 304 (0Cr18Ni9) 316 (0Cr18Ni12Mo2Ti) of sulfuric acid are of limited use. Therefore, the transportation of sulfuric acid valve is usually high-silicon cast iron (casting and machining difficult), and high-alloy stainless steel (Alloy 20) manufacturing. The fluoroplastics has good resistance to sulfuric acid properties, lined valve is a more economical choice.
Hydrochloric acid
The overwhelming majority of metallic materials are intolerant hydrochloric acid corrosion (including all kinds of stainless steel), molybdenum-containing ferrosilicon is also only available for 50 ° C, 30% hydrochloric acid. Contrary to metallic materials, the vast majority of non-metallic materials have good corrosion resistance to hydrochloric acid, lined valves and plastic valves (such as polypropylene, fluorine plastic, etc.) is the best choice for transportation of hydrochloric acid.
Nitric acid
General metal in nitric acid, most of rapid corrosion damage, stainless steel is the most widely used resistance to nitric acid materials have good corrosion resistance, all concentrations of nitric acid at room temperature, it is worth mentioning that the molybdenum-containing stainless steel (316,316 L ) nitric acid corrosion resistance is not only no better than ordinary stainless steel (eg, 304,321), and sometimes even better. For the hot nitric acid, commonly used titanium and titanium alloy materials.
Acetic acid
It is one of the most corrosive substances in the organic acids will be severe corrosion of ordinary steel in acetic acid concentration and temperature, stainless steel is a superior resistance to acetic acid materials, 316 stainless steel containing molybdenum can also apply to high temperature and dilute acetic acid vapor . Can be used for high temperature and high concentration of acetic acid or contain other corrosive media, such as the demanding requirements of high-alloy stainless steel valves, or fluorine plastic valves.
Food vacuum drying device and its progress
The vacuum freeze drying technology has wide application in the field of biological engineering, pharmaceutical industry, food industry, materials science, and agricultural and sideline products deep processing. Therefore, the technology at home and abroad very seriously. Alone at home and abroad about the conference can appreciate this. The country by the Professional Committee of the Chinese Chemical Society of Chemical Engineering, held every two years a national dry Symposium, at which the article has many articles of freeze-drying technology; Professional Committee of the Chinese Association of Refrigeration, held every four years the First National The sexual vacuum freeze-drying Colloquium, at which post all the freeze-dried; Chinese Vacuum Society of Agricultural Machinery Institute, Food Society, pharmaceutical, biotechnology and other aspects of the relevant meetings, and has lyophilized article. International Drying Association, held every two years an academic exchange, the IDS 98 international conference, the United States Missouri – Rolla University, A.Liapis professor, won the "Outstanding freeze-drying Award winning because in the vacuum freeze-drying basic research outstanding contribution; 2000 International Drying Conference attended by more than 30 national and local papers 301, a total of five awards, including the third as "freeze-drying Outstanding Contribution Award"; 2002 13th International Drying Symposium held in Beijing, China, Proceedings, Volume 3, freeze-drying of articles collected in the volume A, eight monographs of the General Assembly stresses mentioned twice in the Northeastern University in the lyophilized cornea to maintain the activity has made the results, Japanese scholars offered to visit the laboratory of the exchange.
Freeze-drying technology at home and abroad based dynamic Northeastern University doctoral student who has established a heat transfer model of the frozen material on the shelf heat transfer model and cornea frozen in the cooling instrument. Sandall and King proposed a model of heat and mass transfer in the drying process of sublimation, referred URIF model (Uniformly Retreating Ice Model), on this basis, such as Liapis and Lifchfield, the desorption of the vacuum freeze-drying process – sublimation model. The hot topics of the current study is the heat and mass transfer of biological cells in the process of freeze-dried, nanometer-sized heat and mass transfer theory.
Freeze-drying equipment at home and abroad dynamic domestic drying equipment has been modernized. Domestic pharmaceutical freeze-drying equipment has achieved a full-featured, reliable, stable performance, advanced control, and the comprehensive implementation of the GMP standard, the technical indicators can meet the needs of the production of biological products and pharmaceutical freeze-dried. The main function inside the hydraulic stopper; line cleaning (CIP); steam sterilization (SIP); control of the main process parameters in the process of freeze. Large-scale food drying equipment has been achieved, currently the largest drying equipment freeze-dried area up to 200m2. The tunnel-type semi-continuous drying equipment has also come out, running in good condition. Food freeze dryer can IPC automatic control, to ensure the quality of the product. Foreign varieties of the drying equipment specifications than domestic, supporting equipment, energy-efficient structure is more sophisticated, continuous drying equipment production capacity. In order to ensure the quality and energy saving of the lyophilized product, often using a combination of freeze-drying equipment and other drying equipment with a combination of drying equipment such as spray freeze drying equipment.
a new green machine fully automatic non-woven step bag making machine
With the development of social, environmental pollution has become more and more serious now, we should vigorously to produce
green products.
Plastic bags to bring convenience to people s lives, but also constituted an important factor in the deterioration of
human living environment. Non-woven production with a short process, high yield varieties change quickly, a wide array of sources
of raw materials, long life, with auto-degradation, is considered to be the best alternative for plastic bags. Experts estimate
that non-woven shopping bags can be reused 10 times or more, 10 percent of the waste on the environment of pollution caused by
plastic bags. Therefore, non-woven bag making machine occupation of a future confidence in the market.
The basic process
On the material (non-woven membrane) → folding → ultrasonic bonding → cutting → bag (notching) → → waste recycling
count → stacking.
Automatic non-woven bag making machine can use the touch screen operation, together with the accurate and stable (running)
step-by-step fixed-length, photoelectric tracking, automatic counting (alarm can be set to count), automatic drilling and other
industrial installations. Meanwhile, in order to further achieve the effect of energy saving and environmental protection WFB600
type more than expected recovery functions in the production process, will bag the remaining waste in the production process is
automatically collected and contribute to secondary use, reduce labor intensity, increase the work efficiency.
The main technical parameters of the non-woven bag making machine
Automatic non-woven bag making machine organic combination of automation and control systems and ultrasonic bonding
application technology to explore a new non-woven bag production process. The device is non-woven fabrics as raw materials,
processing a variety of different specifications, different shapes of the non-woven bags, such as vest bags, handbags, and
perforated bags, with the advantage of a machine.
Foreign advanced ultrasonic bonding technology, wireless suture, synchronization automatically finding, automatic control
of tension, and low production costs. The production of non-woven bags, beautiful appearance, solid structure, strong bearing
physical, up to 20kg or so, the main technical parameters are as follows:
Production speed: 10 ~ 90 / min
Rated voltage: 380V
Rated frequency: 50Hz
The total power is about: 10kw
Dimensions about: length 12000mm x width 2000mm x height 1700mm
Equipment weight approximately: 3000k
nursing heart Doudu
The present invention discloses a baby, and in particular public the heart Doudu of a care. The care the heart Doudu, and including a Doudu main is
special because: said Doudu main shoulder hung a back back central location fixed a back care heart. Described the Doudu the front surface of the
main central location fixed round accessories. Described in the top opening of the round accessories can be inserted into the cotton or pad openings.
Round accessories is not only embellishment can also be replaced according to the season and pediatric physical Bohou different cotton pad, and the
effective protection of the navel is not cold, to avoid the navel cold cause diarrhea. The carefully protected the back part of prevention due to the
cold of the back caused by a fever, easy to use, beautiful and health advantages.
The types and characteristics of the electrode
The chemical composition of the electrode drug skin arc stability, penetration, metal deposition rate and positioning capabilities have a significant
impact.
The electrode can be divided into three categories: cellulose type electrode; titanium dioxide coated electrode; alkaline electrode.
A cellulose type electrode coating rich in fiber, which is characterized by arc melting deep friction and deformation speed, this also increased
throughout the welding speed. However, due to the weld coarse sediment and the flow of slag mixed with slag removal is very difficult. This electrode
can be used in any position, but because of the elevated pipe ( stovepipe welding technique) the use of familiar people.
Features: able to form in all positions deeper penetration; applicable in the downward vertical position welding; good mechanical properties; produce
large amounts of hydrogen – the risk of causing cracks in the heat affected zone (Haz).
2, titanium dioxide electrode coating contains large amounts of titanium dioxide (the rutile). Titanium dioxide to make arc starting, smooth arc
operation and reduced arc spatter easier. This common electrode has good welding characteristics. AC or DC, they can be used for all position welding,
especially suitable for the welding of the joints of the horizontal angle / vertical angular position.
Features: suitable weld metal mechanical properties; viscous slag can form a good weld bead appearance; positioning welding may produce a flow of
slag (containing fluoride); easy slag removal.
3, alkaline electrode drug skin contains large amounts of calcium carbonate (limestone), calcium fluoride (fluorite). Making it the slag than the titanium
dioxide electrode slag easier to flow, and this is a way to assist in the rapid cooling of vertical welding and overhead welding. The electrode used for
welding medium and large-scale structure, requires a high quality of welding, good mechanical properties and resistance to crack (over-binding cracks).
Features: low-hydrogen weld metal; requirements of high welding current / speed; weld bead shape (curved surface contour, roughness); slag
removal difficult; metal powder electrode contains a metal powder in the paint, can make the welding current to the maximum The allowable current.
Therefore, compared with drug skin does not contain iron powder electrode, the metal powder electrode metal deposition rate and efficiency (metal
deposition ratio) has increased, the slag is also very easy to remove. Due to the speed of deposited iron powder electrode for flat welding and
horizontal welding and vertical welding. No significant titanium dioxide electrode and alkaline welding rod arc characteristics, arc intensity is smaller,
reducing the penetration of the weld.