Although China's pneumatic industry has reached a certain scale technical level, compared with the international advanced level, the gap is very large. The output value of China's pneumatic products only accounts for 1.3% of the world's total output value, only 1/21 of the United States, 1/15 of Japan, 1/8 of the swing table cylinders of Germany. This is very disproportionate to a big country with a population of more than 1 billion. In terms of variety, a Japanese company has 6,500 varieties, China has only 1/5 of it. The gap between product performance quality level is also large.

　　Pneumatic technology is a professional technology that uses compressed air as a medium to drive control machinery. Because it has the advantages of energy saving, no pollution, high efficiency, low cost, safe reliable, simple structure, etc., it is widely used in various machinery production lines. In the past, the pneumatic systems their components on production lines such as automobiles tractors were designed, manufactured, maintained by various factories.

　　The expansion of the application of pneumatic technology is a sign of the development of the pneumatic industry. The application of pneumatic components is mainly two aspects: maintenance matching. In the past, the sales of domestic pneumatic components were used for maintenance. In recent years, the sales share directly for the main supporting equipment has increased year by year. The application of domestic pneumatic components ranges metallurgical equipment worth tens of millions of yuan to chairs with only one to two hundred yuan. Specially developed domestically produced pneumatic components are used for railway switches, locomotive wheel rail lubrication, train braking, street cleaning, lifting equipment in special workshops, military command vehicles, etc. This shows that pneumatic technology has "penetrated" into all walks of life is expanding.

　　Although China's pneumatic industry has reached a certain scale technical level, compared with the international advanced level, the gap is very large. The output value of China's pneumatic products only accounts for 1.3% of the world's total output value, only 1/21 of the United States, 1/15 of Japan, 1/8 of Germany. This is very disproportionate to a big country with a population of more than 1 billion. In terms of variety, a Japanese company has 6,500 varieties, China has only 1/5 of it. The gap between product performance quality level is also large.

　　As pneumatic technology is increasingly used in automatic assembly automatic processing of small parts special items in various industries, the performance of the original traditional pneumatic components is constantly improving, at the same time, new products that meet market requirements have been developed one after another The variety of pneumatic components is increasing, their development trends mainly include the following aspects:

　　Smaller size, lighter weight lower power consumption. In the manufacturing industry of electronic components pharmaceuticals, due to the small volume of the processed parts, the size of pneumatic components is bound to be limited. Miniaturization light weight are the high development of pneumatic components direction. Foreign countries have developed ultra-small solenoid valves of only the size of the thumb effective cross-sectional area of 0.2mm2. It is more ideal to develop components with small outline size large flow. For this reason, the flow rate of valves with the same external dimensions has been increased by 2 to 3.3 times. There is a series of small solenoid valves with a valve body width of only 10mm an effective area of up to 5mm2; a width of 15mm an effective area of 10mm2.

　　The power consumption of foreign solenoid valves has reached 0.5W, will be further reduced to adapt to the combination with microelectronics.

　　Most of the air source treatment assemblies use building block structure at home abroad, which is only compact in size, but also convenient for combination maintenance.

　　The positioning accuracy of the actuator is improved, the rigidity is increased, the piston rod does rotate, it is more convenient to use. In order to improve the positioning accuracy of the cylinder, the application of the cylinder with the brake mechanism the servo system is more more common. The cylinder with servo system can obtain a positioning accuracy of ± 0.1mm even if the air supply pressure the negative load change.

　　At international exhibitions, there are many cylinders with various shaped cross-section cylinders piston rods. Since these cylinders will rotate, when applied to the host, they can maintain a certain accuracy without additional guides. In addition, many cylinders cylinder slide assemblies with various guide mechanisms have been developed, such as cylinders with two guide rods, double-piston rod double-cylinder cylinders.

　　The shape of the cylinder barrel is no longer limited to a circle, but a square, a square shape other shapes. Guide grooves, sensors switch installation grooves are opened on the profiles to make it easier for users to install use.

　　Multifunctional complex. In order to facilitate users meet the needs of the market, various small pneumatic systems composed of multiple pneumatic components equipped with control devices have been developed. For example, the component used to move small items is composed of two cylinders with a guide according to the X axis the Z axis. The component can carry 3kg heavy objects, is equipped with solenoid valves programmable controllers. It has a compact structure, occupies little space, has adjustable stroke. Another example is a loading unloading module, which has seven types of modules with different functions. It can complete the loading unloading operations on the precision assembly line, can arbitrarily combine different modules according to the operation content. There is also a manipulator which is a combination of a swing cylinder a chuck that have a small shape can change the swing angle.

　　Combined with electronic technology, a large number of sensors are used, intelligent pneumatic components. Cylinders with switches are commonly used in China. The switch volume will be smaller the performance is higher. It can be embedded in the cylinder block; some also have a two-color display that can show position errors To make the system more reliable. Using sensors to replace flow meters pressure gauges can automatically control the flow pressure of compressed air, which can save energy ensure the normal operation of the device. Pneumatic servo positioning system products have entered the market. The system uses a three-position five-way pneumatic servo valve, compares the predetermined positioning target with the detection data of the position sensor, implements negative feedback control. When the cylinder speed reaches 2m / s the stroke is 300mm, the system positioning accuracy is ± 0.1mm. Japan successfully produced a new type of intelligent solenoid valve. This valve is equipped with a logic circuit with a sensor, which is a product of the combination of pneumatic components optoelectronic technology. It can directly receive the signal of the sensor. When the signal meets the specified conditions, it can complete the action by itself without passing through the external controller to achieve the control purpose. It has been applied to the conveyor belt of objects, which can identify the size of the objects to be transported, so that large pieces are directly sent down small pieces are diverted.

　　Higher safety reliability. the international standards of pneumatic technology in recent years, the standard only puts forward interchangeability requirements, but also emphasizes safety. The pressure test of pipe joints, air source treatment shells other pressure tests is increased to 4 to 5 times of the use pressure, the pressure resistance time is increased to 5 to 15 minutes, the test must be conducted at high low temperatures. If these international standards are implemented, it is difficult for domestic cylinders, end caps, gas source treatment castings pipe joints to meet the standards. In addition to the withstand voltage test, certain regulations have also been made on the structure, such as the provision of a metal protective cover on the outside of the transparent shell for gas source treatment.

　　Many uses of pneumatic components, such as rolling mills, textile lines, etc., cannot be interrupted during working hours due to the quality of the pneumatic components, otherwise it will cause huge losses, so the reliability of the pneumatic components is very important. In marine ships, there are many pneumatic components used, but there are many pneumatic component factories that can break into this field, because their reliability requirements for pneumatic components are particularly high, they must pass the certification of relevant international machinery.

　　To the direction of high speed, high frequency, high response, long life. In order to improve the production efficiency of production equipment, it is imperative to increase the working speed of the actuator. Now the working speed of the cylinder in our country is generally below 0.5m / s. According to the prediction of Japanese experts, the working speed of most of the cylinders will be increased to 1-2m / s in five years, some requirements will reach 5m / s. The increase in the working speed of the cylinder requires only the quality of the cylinder to be improved, but also a corresponding structural improvement, such as the configuration of an oil pressure shock absorber to increase the cushioning effect. The response time of the solenoid valve will be less than 10ms, the service life will be increased to more than 50 million times. There is a gap-sealed valve in the United States. Because the valve core is suspended in the valve body does contact each other, the life expectancy is up to 200 million times without lubrication.

　　Oil-free lubrication technology is commonly used to meet certain special requirements. Due to environmental pollution the requirements of electronics, medical, food other industries, no oil is allowed in the environment, so oil-free lubrication is the development trend of pneumatic components, oil-free lubrication Simplify the system. The lubricator has been eliminated on the European market, it has generally achieved oil-free lubrication. In addition, in order to satisfy certain

　　Special requirements, deodorization, sterilization precision filters are constantly being developed, the filtration accuracy has reached 0.1 ~ 0.3μm, the filtration efficiency has reached 99.9999%.

　　For some special requirements, improvement development of pneumatic products can occupy a market obtain considerable economic benefits, which has been agreed by everyone. Jinan Huaneng Pneumatic Components Co., Ltd. has developed cylinders valves for the special requirements of railway marshalling wheel-rail lubrication, which has attracted the attention of the railway department.

　　Use new materials combine with new technologies. Foreign countries have developed membrane dryers, which use high-tech reverse dialysis membranes to filter out moisture in compressed air. They have energy saving, long life, high reliability, small size weight. Light other characteristics, suitable for occasions with little flow.

　　Pneumatic seals made of composite materials with PTFE as the main body can withstand heat (260 ° C), cold resistance (-55 ° C) wear resistance, their use occasions are increasing.

　　In order to improve the quality, new technologies such as vacuum die casting oxyhydrogen explosion deburring are being gradually promoted in the manufacture of pneumatic components.

　　It is easy to maintain, repair use. Foreign countries are studying the use of sensors to realize pneumatic components systems with fault prediction self-diagnosis functions.

　　It can be seen the development direction of the above-mentioned pneumatic technology that we have a lot of work to do in the development of pneumatic products. Any pneumatic component factory, even if its scale is large, as long as it breaks through one aspect maintains technological leadership, it can occupy a place in the market survive develop in the fierce competition.