Pneumatic valve matters needing attention and installation use pneumatic valve control technology in the development of industry applications

Pneumatic valve matters needing attention and installation use pneumatic valve control technology in the development of industry applications

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Pneumatic valves are valves driven by compressed air. Pneumatic valve procurement only clear specifications, categories, pressure to meet the procurement requirements of the practice, can be used to control the flow of air, water, steam, all kinds of corrosive media, mud, oil, liquid metal and radioactive media and other types of fluid. It is not perfect in the current market economy environment. Because the pneumatic valve manufacturers for product competition, each in the pneumatic valve unified design idea, different innovation, formed their own enterprise standards and product personality. Therefore, it is very necessary to put forward the technical requirements in detail when purchasing pneumatic valves, and coordinate with manufacturers to obtain consensus, as the annex of the pneumatic valve procurement contract. Valves of this type should generally be installed horizontally in the pipeline.
In the process of transportation, the pneumatic valve should pay attention to:
1, the pneumatic valve should be set on both sides of the light sealing plate.
2. Medium and small caliber pneumatic valves should be tied with straw rope and transported in containers.
3, large diameter pneumatic valve also has a simple wooden frame solid packaging, so as to avoid damage in the process of transportation.
Install and use
(1) Before the installation and use of pneumatic valve, the valve must be inspected before installation and switch operation test. Only under the condition of normal operation, can be installed and used.
(2) the installation of pneumatic valve should be as far as possible to make the valve and pipeline flange concentric, and support fixed. Can not make the ball valve by other external forces, so as not to damage the valve seal and valve deformation. Cause valve switch not work and valve damage and can not be used.
(3) To ensure that the power gas source provided by the ball valve and pneumatic components must be clean, as far as possible without oil and water. The cleanliness should be less than 0.4 micron.
(4) Before connecting to the air source, it is necessary to clean the air supply pipeline, air source interface and switch and other devices to prevent the failure caused by the unclean pipeline with dirt and sediment rushing into the pneumatic actuator unit.
(5) Pneumatic actuator, solenoid valve, positioner, filter, pressure reducing valve and other connections, available copper pipe or nylon pipe, in order to prevent dust and reduce noise, exhaust port should be installed muffler or muffler throttle valve.
(6) After the installation, the pneumatic valve should be tested, the pneumatic actuator pressure to the rated value, the pressure is 0.4 ~ 0.7mpa, the pneumatic ball valve switch test, observe the opening and closing of the valve. Should be flexible rotation without stuck phenomenon. In the switch if there is stuck phenomenon can increase the pressure, repeatedly switch the valve to switch flexible.
(7) When installing and debugging the switch type pneumatic valve, first use the manual device (manual button on the solenoid valve) debugging, after normal operation in the power debugging.
(8) The pneumatic valve should be regularly maintained at the rotation of the valve stem, and should be refueled (oil) once in three months. Regularly discharge and discharge water to the pneumatic actuator unit and the air filter used together. Under normal circumstances, check once every six months and overhaul once a year.
Development of pneumatic valve control technology in industry application
Pneumatic valve control technology is a kind of professional technology which uses compressed air as the medium to drive and control machinery. Due to the advantages of energy saving, no pollution, low cost, safe and reliable, simple structure, pneumatic valve control technology is widely used in all kinds of machinery and equipment. With the continuous development of market and technology, the gradual unification of standards has changed the unfavorable situation that the pneumatic system and its components were designed, manufactured and maintained by each factory.
The expansion of the application surface of pneumatic valve control technology is a sign of the development of pneumatic industry. The application of pneumatic components is mainly in two aspects: maintenance and matching. In the past, the sales of domestic pneumatic components should be used for maintenance. In recent years, the sales share of the main supporting equipment is increasing year by year. The application of domestic pneumatic components, from tens of millions of yuan worth of metallurgical equipment to only 1 ~ 2 hundred yuan chair. Specially developed domestic pneumatic components are used in railway turning, locomotive wheel and rail lubrication, train brakes, street cleaning, lifting equipment in special workshop, and command car. This shows that pneumatic valve control technology has “penetrated” to all walks of life, and is expanding.

Although the pneumatic industry in our country has reached a certain scale and technical level, but compared with the international advanced level, there is a great gap. The output value of Chinese pneumatic products only accounts for 1.3% of the world’s total output value, * 1/21 of the United States, 1/15 of Japan, and 1/8 of Germany. This is not appropriate for a country with a population of more than one billion people. In terms of varieties, a Japanese company has 6500 varieties, our country only has its 1/5. The gap between product performance and quality level is also large.
The pneumatic valve control technology is increasingly used in various industries automatic assembly and automatic processing of small, special items of equipment, the original traditional pneumatic components are constantly improve performance, and gradually developed to meet the market requirements of new products, make the pneumatic components of the varieties increased, its developing tendency mainly has the following several aspects:
1, smaller size, lighter weight, lower power consumption. In the manufacturing industries of electronic components and pharmaceuticals, the size of pneumatic components is bound to be limited due to the small volume of the processed parts. Miniaturization and lightness are the development directions of pneumatic components.
2, foreign has developed the largest thumb size, effective cross-sectional area of 0.2mm2 of the ultra-small solenoid valve. It is more ideal to develop components with small dimensions and large flow.
To this end, the same size of the valve, flow has been increased by 2 ~ 3.3 times. There is a series of small solenoid valve, its body width *10mm, effective area up to 5mm2; Width 15mm, effective area up to 10mm2.
3, foreign solenoid valve power consumption has reached 0.5W, will be further reduced to adapt to the combination of microelectronics.
4, air source processing components, most of the domestic and foreign use the building block structure, not the most compact size, and combination, maintenance is very convenient.
The positioning accuracy of the actuator is improved, the stiffness is increased, the piston rod does not rotate, and the use is more convenient. In order to improve the positioning accuracy of the cylinder, the application of the cylinder with braking mechanism and servo system is more and more common. The cylinder with servo system can obtain the positioning accuracy of ±0.1mm even if the air supply pressure and the negative load change.


Post time: Sep-27-2022

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