Introduction
In recent years, China has entered the information age in an all-around way, and we have rapidly improved the level of science and technology. At the same time, the scale of domestic industrial construction is constantly expanding, and the characteristics of the era of integrating modern science and technology in the field of industrial development are becoming more and more obvious. When transporting oil, natural gas and other resources, pipeline equipment with complex structure and complicated control will be used, in which electric valves play an important role.
Electric valve has always been the main executive equipment in the modern control system, which we widely use in the pipeline system, and can effectively play the role of controlling medium flow. However, the electric valve industry has been lacking in intelligent construction, which makes us unable to update the development of electric valves, and gradually becomes one of the main problems for us to solve in the development of industrial fields. Intelligentization of electric valves means that we can improve related work by computer technology, and can further improve work efficiency.
We can see that the intellectualization of electric valves is the inevitable trend of development, and it has also become an important topic of concern in the industrial field. Nowadays, we have improve the industrial environment, and the requirements for electric valves in the operation of the pipeline system are becoming more and more strict, which requires them to have good and stable performance and provide guarantee for work practice. Therefore, the intelligent development of electric valves is very necessary. Only when we implement its intelligent construction can the industrial development level reach by going up one flight of stairs.
Classification of the Valve Drive
Valves can effectively control the medium flow in the pipeline system, and the work they undertake plays an important role in the operation of the pipeline system and the stability of industrial engineering, which is indispensable in industrial production. We usually connect valves with different power sources in the application, so we can devide them into the hydraulic transmission, pneumatic transmission and electric transmission according to power sources. We will also differentiate the application of these three valves according to the actual situation of the pipeline system.
(1) Hydraulic transmission valve
Hydraulic transmission valve mainly uses liquid as transmission medium, which can realize the transmission and control of great torque. Although the volume of the liquid medium is relatively small, hydraulic transmission can still make use of it. The hydraulic transmission valve has a large volume, so it is necessary to consider the use scene during installation, otherwise, we may not install it.
(2) Pneumatic transmission valve
Pneumatic valve is a common valve type in industrial production, and the medium is air. The nature of air is relatively special, so pneumatic transmission valves can avoid accidents to a certain extent, but the manufacture of compressed gas is not easy to realize.
(3) Electric drive valve
We can contro the electric valve manually or by automation technology in use, which has the characteristics of high efficiency and timely response. When we compare it with traditional hydraulic and pneumatic valves, electric valves have many advantages.
① With the help of computers, we introduce the new technology of electronic information, which is convenient and fast.
② Electric valves do not need special air purification and air source devices, while traditional valves have more investment in this aspect.
③ If the electric valve loses power, it can keep its original execution position.
④ Electric valves can realize remote control, and there are fewer obstacles in signal transmission.
⑤ Compared with traditional valves, cable laying is easier than gas pipeline and liquid pipeline laying, and subsequent cable pipeline inspection is more convenient. Although the one-time purchase cost of the cable is high, it does not need to bear more maintenance costs, the total cost is not high, and at the same time, there is no shortcoming of excessive instantaneous impulse, so we can greatlyl reduce the failure rate.
Main Features of Intelligent Electric Valves
(1) Digitization of communication
We need to connect the operation of the intelligent electric valve first with the host computer through radio waves, and the host computer sends addressable digital signals through the data information it has mastered, and then sends them back to the intelligent electric valve. As an electric actuator, we can correspondingly open and close and operate electric valves according to the acquired signals. Different from the traditional operation mode of electric valves, intelligent electric valves can obtain a control basis through digital communication, which can save labor costs to a certain extent and make the operation mode of electric valves more flexible.
(2) Technology of control
Usually, we need to control the flow and pressure in the pipeline by the electric actuator. The actuator obtains the control signal transmitted from the control system and adjusts the switch of the electric valve through the driving device. The intellectualization of electric valves can add an intelligent control function to the electric actuator, which is equivalent to adjusting switch action value in the traditional control method. The intellectualization of electric valves can increase the function of servo amplifiers and make the control process more scientific and technological.
(3) Intelligent diagnosis
When equipment failure occurs in the operation of traditional electric valves, we may need systematic investigation, diagnosis and repair to ensure the normal operation of electric valves. The intelligent electric valve has a relatively perfect self-diagnosis system, that is, we place a sensor on the actuator. Once the electric valve fails, the sensor will receive an abnormal signal for analysis and diagnosis. At the same time, we can appropriately add detection equipment to the circuit. When the received execution command deviates from the equipment itself, we can detect the abnormal situation by the detection equipment in time.
(4) Structural integration.
Electric valves and automatic actuators are a whole. In the process of realizing the intellectualization of electric valves, we should also ensure the synchronous development of electric valves and automatic actuators, so as to further ensure the superiority of the intellectualization of electric valves. The structural optimization design is also the performance of intelligence. The electric valve adopts the integrated structure for design optimization, and we can install it with the whole control circuit, which can not only ensure the structural integrity, but also facilitate the installation and operation of the control system, and improve the stability of the system at the same time.
Analysis of Intelligent Development Status of Electric Valves
1. Research Status of Intelligent Electric Valve
Part 1
At present, there is no uniformity in the production of electric valves and electric actuators in our country. We can devide electric valves into two parts: valves and electric actuators. However, in the current market environment, usually, the producers of these two parts are different manufacturers. Therefore, the manufacturers of valves and electric actuators usually only produce products from their own perspectives, lacking technical exchanges with each other, which may lead to mismatches in the design and manufacture of product details.
The industry requirements, market competitiveness and product quality of their own products affects The problems that manufacturers pay most attention to in the production process, but it is easy to ignore the complete set of products between valves and electric actuators. Although China can still find basic complete sets of electric valves in industrial engineering, and we also plan the national standards for related equipment through relevant documents, the problem of complete sets of equipment still exists.
Part 2
In a short time, it is difficult to find valves and electric actuators that fully meet the requirements of the complete set, so the practical work has certain challenges. We have not paid attention to the complete set of problems between valves and electric actuators to by relevant departments, and there is no relevant document to put forward the complete set of standards for electric valves, so the project can only remain in the current state in practical application.
On the other hand, there are some problems with the structure of electric valves. The organization structure of the valve is relatively simple, but the structure of the electric actuator is very complicated. Therefore, in the process of intelligent construction of the electric valve, we usually place the emphasis on the electric actuator, and we carry out its intelligent research from multiple angles and levels, but we neglect the intelligent promotion of the valve device, which leads to the unbalanced development of the valve and the electric actuator in the electric valve device. The optimization of the valve has never been implemented, which hinders the intelligent development of the whole electric valve.
2. Research status of intelligent electric actuator
Nowadays, domestic computer technology, information technology and communication technology have been developed at a high level, which is very beneficial to the intelligent construction of electric valves and can be guaranteed by technology in all aspects. Some equipment manufacturers put forward the concept of the advanced electric actuator in the production process, and directly introduce the processing system into the actuator of electric valve, that is, continuously upgrading the system while enriching the products to promote the further development of the control function. Compared with traditional equipment, an intelligent electric actuator has obvious advantages.
(1) The intelligent electric actuator can set its parameters before it is put into use so that it can realize the automation of operation and control, and the set working procedure is relatively simple, so it can ensure the stable and continuous operation of the equipment. The advantages of intelligent electric actuators can be fully reflected in the occasions with strict explosion-proof requirements.
(2) The intelligent electric actuator can also be connected with the display screen, and the state of the electric valve can be monitored in real-time by means of a liquid crystal display, which is helpful to find out the fault of the electric valve in time and repair it at the first time to keep the stable operation of the electric valve.
The Development Process of Intelligent Electric Valves
Part 1
The concept of intelligent electric valves was first put forward in the 1950s when the market demand for electric valves was great, and it was also necessary to provide continuous support for the development of the equipment itself, so the products on the market were often in short supply. With the rapid development of China’s social economy, almost all industrial production needs electric valves to play a role, so the application range of electric valves has become wider and the practical application efficiency has been greatly improved. At the same time, the industrial development process has put forward more stringent requirements for the intelligence of electric valves. However, the upgrading speed of electric valve equipment is very slow, and the existing electric valves in the market frequently have structural problems and lack of accuracy, which can not meet the industry requirements.
Part 2
Therefore, with the fluctuation of the times, the development direction of electric valves has also begun to incorporate scientific and technological elements, which has opened up the exploration of equipment intelligence, and the number of mechatronics products has gradually increased. At present, the electric valve is moving from the traditional mechanical mechanism to the intelligent direction, especially the optimization of the control system of the electric valve highlights the application advantages of electronic technology in this field.
The operation mode has changed from traditional comprehensive manual operation to manual auxiliary operation, and the use functions have become richer. Recently, the application of single-chip microcomputer technology has played an important role in improving the equipment. A single-chip microcomputer can fully realize the digital control of electric valves, laying a solid foundation for the intelligent development of electric valves. In addition, there are many professional technologies that can promote the intelligent construction of electric valves, which need to be further explored and explored in related fields.
Conclusion
The progress of science and technology in China has made clear the direction for the development of industrial production, but there is still a certain gap between China and western countries in the intelligent construction of electric valves, and the road of development is long and arduous. At present, the industrial field has put forward stricter requirements for the production of electric valves. In the production process, it is necessary to not only improve the intelligence of equipment but also pay attention to the realization of the unity of valves and electric actuators.
Only by considering all kinds of problems that may be encountered in the process of intelligent construction of electric valves, actively integrating modern scientific and technological means and taking scientific countermeasures can we truly realize the intelligent construction of electric valves, play an active role in the overall development of China’s industry and improve China’s competitiveness in the world economic environment.
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