The future development direction of solenoid valves

We know that the solenoid valve has many advantages, making it a widely used valve product, but everything has two sides. Solenoid valve has developed to its limits today. For example, solenoid VALVES usually only have two switches. In this state, the valve core can only be in two extreme positions and cannot be continuously adjusted. Therefore, the adjustment accuracy of the solenoid valve is also limited. The solenoid valve also has high requirements on the cleanliness of the medium. The medium containing the granular material cannot be applied. Filter first. In addition, viscous media is not suitable, and the viscosity range of the medium for a particular product is relatively narrow.

Therefore, the technical engineers of the solenoid valve division of Shenzhen Ming Valve believe that the breakthrough limitation is an important proposition of the development of solenoid valve technology.

The integration of traditional fluid power transmission technology with automation and IT technology has also placed higher demands on solenoid valves. At present, the solenoid valve is developing in the direction of long life, miniaturization, intelligence, energy saving, environmental protection and high integration.

(1) Miniaturization and longevity

"Miniature" is a trend in the development of solenoid valve technology, which is also an inevitable requirement for the lightweight valve to the solenoid valve. The miniaturization of solenoid valves not only reduces unnecessary waste of resources, but also helps to reduce equipment investment.

The miniaturization of solenoid valves does not mean at the expense of flow. The development of the miniaturization of solenoid valves is based on the premise of constant flow – this raises further questions for the study of solenoid valves. This involves the scientificization of the electromagnetic head technology and the flow path. When the thrust of the moving core is constant, the large-scale reduction of the size of the electromagnetic head provides a possibility of miniaturization and energy saving of the electromagnetic valve. It is worth mentioning that the development of modern microelectronics technology has become a factor that cannot be ignored in the promotion of "electromagnetic head" technology.

The extension of the life of the solenoid valve is not a new issue. The industry that has a demand for solenoid valves has never stopped pursuing its longevity. In recent years, the continuous introduction of new materials and manufacturing processes has made it possible to greatly increase the life of solenoid valves, and to maximize the friction between the valve core and the valve sleeve in the main valve. For example, the world's famous solenoid valve brands - the US VD VTON and the American ASCO , have developed solenoid valve products that use switch life of tens of millions of times.

(II) Development of intelligent direction

The intelligentization of the solenoid valve mainly refers to how the solenoid valve can better cooperate with the smart meter to improve the control precision and reliability of the system.

It is generally considered that the position adjustment is difficult to achieve high precision, but in many cases, the appropriate method can be used to achieve the required high precision, and the cost is greatly reduced.

It is reported that there are already electromagnetic valves in China that can completely change the traditional analog control mode, and can realize remote control completely through the field bus or PC . Some products can be applied to traditional production requirements with large flow requirements or full control of pressure proportional valves through digital signal feedback for precise control; even some products are designed to meet customers' high flow response requirements for solenoid valve islands. Speed, repeatability and other requirements.

The fieldbus technology of Zhejiang Permanent Technology Industrial Co., Ltd. has been successfully applied to industrial process control. The important reason for its non-negligibility is that the company has developed a solenoid valve that outputs a valve position signal, and its switching quantity directly enters the remote IO control box. The analog signal is also converted locally to digital by the AD template and passed to the PLC via the fieldbus cable . It realizes the visualization of the work process, which is convenient for monitoring, and can also automatically alarm when an abnormality is found.

Moreover, according to the introduction, in terms of pipeline configuration, there are combined solenoid valves, double solenoid valves, multi-channel solenoid valves, and three-position solenoid valves. This enables intelligent control to be executed efficiently and efficiently. In terms of maintenance and repair, the permanent company's multi-function solenoid valve can isolate itself and perform on-line maintenance of the solenoid valve under the normal operation of the production system, greatly improving the operating efficiency of the equipment.

(3) Ultra-clean, low temperature rise is another important issue facing the solenoid valve technology

In today's society, the standards of each industry have been improved to varying degrees, including cleanliness and temperature requirements. These two requirements must be implemented in certain industries. For example, micro-industry and hemodialysis, biological agents, pharmaceuticals and other industries closely related to human health, "dust" must not be allowed to appear. It is clear that solenoid valves, as components used in these industries, must be designed with ease and temperature in mind.

The solenoid valve is controlled by the moving spool to change the effective area of the flow passage to control the direction, flow and pressure of the fluid. The friction and impact of the spool during the movement will inevitably generate particles; recently, in order to improve the solenoid valve Lifetime, the friction pair between the valve plug and the valve sleeve often requires grease to lubricate, which undoubtedly brings another source of particle generation: grease.

It is reported that ultra-clean solenoid valves have appeared. It can successfully avoid the pollution of the controlled fluid, and the temperature rise is only 1 °C, effectively avoiding the impact on the constant temperature environment and special fluid performance.

(4) Energy conservation and environmental protection are continuing challenges

With the deepening of environmental awareness, energy saving and environmental protection have also presented new challenges to the solenoid valve industry. Moreover, the recent EU ROX Directive has entered China, which is no different from setting an environmental protection threshold for various industries.

Pioneers in the solenoid valve industry have taken their own steps: some solenoid valve manufacturers have begun to set management objectives in accordance with the EU's R0HS specifications to prevent the generation of pollutants, structural improvements and the development of new magnetic materials. The power of the solenoid valve is greatly reduced, and the heat generated by the original electromagnetic coil is effectively reduced.

In addition, the automatic holding solenoid valve has appeared. According to reports, this type of valve is energized only at the moment of opening or closing, and is normally maintained by a permanent magnet, which has a good energy saving effect.

In fact, the choice of solenoid valve material, the design of the magnetic circuit, the configuration of the circuit, the manufacture of the valve core, etc. are all related to energy consumption.

From the perspective of environmental protection, materials containing heavy metals such as Pb , Hg , Cd , Cr5+ and substances that are difficult to degrade by PBB and PBDE are detrimental to the global environment and human health.

The data indicate that the United States Granville Shield VTON is developing micro-valve (or miniature silicon material valve) with a piezo-driven development. When it is the nominal diameter of 0.25mm, a working pressure of 1 ~ 11 bar, its power consumption is only 400 μ W, a response time of 20 μ s.

Shenzhen Import and Export Trade name Valve Co., Ltd., the United States Granville Shield VTON valve, German special forces LIT Valve Co., Ltd. is the official authorized agent, responsible for the United States Granville Shield VTON, German special forces LIT electric solenoid valves and valve products sales promotion, Technical support and service , the main solenoid valve products are: imported solenoid valve, imported stainless steel solenoid valve, imported high pressure solenoid valve, imported pilot solenoid valve, imported direct-acting solenoid valve, imported steam solenoid valve, imported water solenoid valve , imported high temperature solenoid valve, imported explosion-proof solenoid valve, imported signal feedback solenoid valve, imported three-way solenoid valve, electric ball valve, electric BUTTERFLY VALVE, electric control valve, etc.;