6D solenoid valve working principle, solenoid valve working principle

There is a closed cavity in the solenoid valve, there are through holes in different positions, each hole is connected to a different oil pipe, the middle of the cavity is a piston, two sides are two electromagnets, which side of the magnet coil energized valve body will be attracted to which side, open or close different oil drain holes by controlling the movement of the valve body, and the oil inlet hole is normally open, the hydraulic oil will enter different oil drain pipes, and then push the piston of the oil cylinder through the pressure of the oil, the piston drives the piston rod again, and the piston rod drives the mechanical device. In this way, the mechanical movement is controlled by controlling the current interruption of the electromagnet.

1. Solenoid valves are divided into three categories in principle:

Direct-acting solenoid valve.

Principle: When energized, the electromagnetic coil generates electromagnetic force to lift the closing part from the valve seat and the valve opens; When the power is off, the electromagnetic force disappears, the spring presses the shut-off against the valve seat, and the valve closes.

Features: It can work normally under vacuum, negative pressure and zero pressure, but the diameter is generally not more than 25mm.

Step-by-step direct-acting solenoid valve.

Principle: It is a combination of direct and pilot principle, when there is no pressure difference between the inlet and the outlet, after the power is on, the electromagnetic force directly lifts the pilot valve and the main valve closure up in turn, and the valve opens. When the inlet and outlet reach the starting pressure difference, after the power is applied, the pressure of the lower chamber of the electromagnetic pilot valve and the main valve rises, and the pressure of the upper chamber decreases, so as to use the pressure difference to push the main valve upward; When the power is off, the pilot valve uses the spring force or medium pressure to push the shut-off and move down to close the valve.

Features: It can also operate when there is zero pressure difference or vacuum and high pressure, but the power is large, and it must be installed horizontally.

Pilot operated solenoid valve.

Principle: When energized, the electromagnetic force opens the pilot hole, and the pressure of the upper chamber drops rapidly, forming a low and high pressure difference around the closing piece, and the fluid pressure pushes the closing part to move upward, and the valve opens; When the power is off, the spring force closes the pilot hole, and the inlet pressure quickly forms a low and high pressure difference around the closing valve through the bypass hole, and the fluid pressure pushes the closing part to move down and close the valve.

Features: The upper limit of the fluid pressure range is high, and it can be installed arbitrarily (customization required) but the fluid pressure differential condition must be met.

2. Solenoid valves are divided into six sub-categories from the differences in valve structure and materials and the difference in principle: direct-acting diaphragm structure, step-by-step direct-acting diaphragm structure, pilot diaphragm structure, direct-acting piston structure, step-by-step direct-acting piston structure, and pilot piston structure.

3. Solenoid valves are classified according to their functions: water solenoid valves, steam solenoid valves, refrigeration solenoid valves, cryogenic solenoid valves, gas solenoid valves, fire solenoid valves, ammonia solenoid valves, gas solenoid valves, liquid solenoid valves, miniature solenoid valves, pulse solenoid valves, hydraulic solenoid valves, normally open solenoid valves, oil solenoid valves, DC solenoid valves, high-pressure solenoid valves, explosion-proof solenoid valves, etc.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Tracing the development history of solenoid valves, so far, solenoid valves at home and abroad are divided into three categories in principle (namely: direct-acting, step-by-step direct-acting, pilot-operated), and from the difference in disc structure and material and the difference in principle, it is divided into six sub-categories (direct-acting diaphragm structure, step-by-step diaphragm structure, pilot-operated diaphragm structure, direct-acting piston structure, step-by-step piston structure, pilot piston structure).

1) Direct-acting solenoid valve.

Principle: When energized, the electromagnetic coil generates electromagnetic force to lift the closing part from the valve seat and the valve opens; When the power is off, the electromagnetic force disappears, the spring force presses the shut-off on the valve seat, and the valve closes.

Features: It can work normally under vacuum, negative pressure and zero pressure, but the general diameter does not exceed 25mm.

2) Step-by-step direct-acting solenoid valve.

Principle: It is a combination of direct and pilot principle, when the inlet and outlet pressure difference, when energized, the electromagnetic force directly lifts the pilot valve and the main valve closure up in turn, and the valve opens.

When the pressure difference between the inlet and the outlet, when the power is on, the electromagnetic force first opens the pilot small valve, the pressure in the lower chamber of the main valve rises, and the pressure in the upper chamber decreases, so as to use the pressure difference to push the main valve upward; When the power is off, the pilot valve and the main valve use the spring force or medium pressure to push the shut-off and move down to close the valve.

Features: It can also work reliably at zero pressure difference or vacuum and high pressure, but the power is large and requires vertical installation.

3) Pilot operated solenoid valve.

Principle: When energized, the electromagnetic force opens the pilot hole, and the pressure of the upper chamber drops rapidly, forming a low and high pressure difference around the closing part, pushing the closing part to move upwards and the valve open; When the power is off, the spring force closes the pilot hole, and the inlet pressure quickly enters the upper chamber through the bypass hole, forming a low and high pressure difference around the closing valve, pushing the closing part to move down and closing the valve.

Features: The upper limit of the fluid pressure range is high, but the fluid pressure differential condition must be met.

The solenoid valve is to use the electromagnet "coil" to generate electromagnetic attraction, drive the valve, and make the valve open and close.

It is completely possible, but it is not so complicated, and it can be done without relays, because the principle of the solenoid valve is very simple, that is, an electromagnet is installed on the valve core, when the electromagnet coil is electrified, the valve core is sucked up, the valve is opened, and when the power is lost, the valve will automatically close under the action of the spring. The switch can be switched with a button, and the voltage selection should be selected according to the coil voltage identification.

The principle of several common hydraulic solenoid valves.

A solenoid valve is essentially an electrically powered liquid (or gas) valve. It consists of a coil, a steel valve and a spring, and when energized, the valve is opened and closed by overcoming the spring force using the principle of electromagnetic force.

2-position 4-way double electronically controlled directional valve, two boxes represent two different working states, and the airflow direction is also different.

The working principle of the <> solenoid valve is to use the action of the electromagnet to open and close the valve. When the electromagnet is energized, a certain amount of electromagnetic force will be generated to make the valve open; Conversely, when the electromagnet is de-energized, the valve will automatically close due to the effect of restoring or elastic force.

The structure of the solenoid valve is roughly divided into two parts, including the solenoid part and the valve part. Among them, the electromagnetic part is composed of electromagnets, iron cores, switches and other components; The valve part is composed of valve body, valve core, spring and other components. When the solenoid valve is energized, the electromagnetic force acts on the iron core, so that the valve core is opened, and the refrigerant flows into the refrigeration system through the valve port; When the solenoid valve is de-energized, the action of the spring causes the spool to close and the refrigerant to stop flowing.

Shenzhou Refrigeration Operation and Maintenance Service Center Repair, maintenance and maintenance of cold storage refrigeration system equipment 400-080-1989

The working principle of the solenoid valve: The solenoid valve contains a closed cavity, the middle of the cavity is a piston, and the two sides of the cavity are two electromagnets, once the solenoid coil is energized, the valve body is attracted to the direction of the energized electromagnet by force; And there are through holes at different positions in the cavity, which are connected to different oil pipes, so that part of the oil drain hole can be selected to open by controlling the movement of the valve body; Since the oil inlet hole is in the normally open state, the movement of the valve body causes the hydraulic oil to enter different oil discharge pipes, and the pressure of the oil pushes the piston of the cylinder, which in turn pushes the piston rod, thereby driving the mechanical device. Using this principle, it is possible to control the movement of the machine by controlling the current and disconnection of the electromagnet.

Specific classification: 1. The working principle of the direct-acting solenoid valve: when the power is on, the electromagnetic coil generates electromagnetic force, directly sucks the valve core, and the valve core is displaced.

When the power is off, the electromagnetic force disappears and the spool is reset by spring. Working principle diagram of direct-acting solenoid valve: 2. Working principle of distributed direct-acting solenoid valve:

It is a combination of direct-acting and pilot-operated principles. Normally closed--- when there is no pressure difference between the inlet and the outlet, the electromagnetic force directly opens the pilot hole after the energization, connects the main valve, and the piston is lifted upwards in turn, and the valve is opened; When the inlet and outlet reach the starting pressure difference, after the power is on, the electromagnetic force first opens the pilot hole, and the pressure in the upper chamber of the main valve piston drops, so that the pressure difference and electromagnetic force are used to pull the main piston, and the valve port is opened; When the power is off, the pilot hole is closed by the spring return, and the upper cavity of the main piston is pressurized, and the main piston is pushed to move downward, and the valve is closed. Normally open is the opposite of normally closed.

Working principle diagram of distributed direct-acting solenoid valve: 3. Working principle of pilot solenoid valve: when the normally closed --- is energized, the electromagnetic force attracts the pilot hole spool, the pilot hole is opened, the pressure of the upper chamber of the main valve piston drops, and the upper cavity and lower chamber of the main piston form a high pressure, so that the lower chamber pressure pushes the main piston to open the valve; When the power is off, the spring force is reset to close the pilot hole, the upper cavity of the main piston is pressurized, and the upper and lower cavities of the main piston are formed with high and low pressure, and the medium pressure and spring force push the main piston, and the valve is closed.

Normally open is the opposite of normally closed. Working principle diagram of pilot operated solenoid valve:

The pneumatic solenoid valve is composed of two parts: pneumatic power element and electromagnetic control element, and the solenoid valve plays the role of sending signals to control the pneumatic power element to open or close the valve.

The working principle of the solenoid valve, there is a closed cavity in the solenoid valve, and there are through holes in different positions, and each hole leads to a different one.

In the middle of the oil pipe cavity is the valve, and there are two electromagnets on both sides, and the magnet coil on which side is energized will be attracted to which side and pass through.

Control the movement of the valve body to block or leak different drain holes, and hydraulic oil with normally open oil will enter different.

The oil drain pipe then pushes the piston of the oil through oil pressure, and the piston drives the piston rod, and the piston rod drives the mechanical device.

In this way, the mechanical movement is controlled by controlling the current of the electromagnet.

So far, solenoid valves at home and abroad are divided into three categories in principle (namely: direct-acting, step-by-step child pilot type.

And from the disc. The differences in structure and material and the difference in principle are further divided into six sub-categories (direct-acting diaphragm structure, step-by-step heavy lamination).

structure, pilot diaphragm structure, direct-acting piston structure, step-by-step direct-acting piston structure, pilot piston structure.

The working principle of the three-position five-way electromagnetic directional valve is to block or leak different oil discharge holes by controlling the movement of the valve body, and the oil inlet hole is normally open, the hydraulic oil will enter the different oil discharge pipes, and then push the piston of the oil gang through the pressure of the oil, and the piston rod drives the piston rod, and the piston rod drives the mechanical device to move. In this way, the mechanical movement is controlled by controlling the current of the electromagnet.

Working medium: air;

Mode of action: internal pilot type;

Lubrication: Not required;

Working Pressure:;

Maximum Pressure:;

Operating temperature: -5 60 ;

Protection level: IP65 (DIN40050);

Connection type: direct outlet type or terminal type.

Du Li: As the name suggests, three working positions and five mouths.

The three-position solenoid valve has two coils. Let's call them A and B coils for now.

When AB is not energized, the valve core is a position, and the valve core will act when A is energized, which is the second position, and the position of the valve core is the third position when A is powered off and B is powered on. So there are three positions in total.

The three-position five-way solenoid valve "Y" is the leak type; "P" is medium voltage type; Middle-sealed omitted callouts. Explosion-proof solenoid valves are marked with "EX" after the order number.

When working at ordinary times, the left and right two positions are controlled up and down respectively, and the middle position can be stopped at any position, which is equivalent to when the power is off, the cylinder will automatically stop in the original position.

The working principle of the three-position five-way is the same as that of the two-position three-way and the two-position four-way are to achieve the opening and closing of the actuator through electromagnetic commutation. But the advantage of the three-digit five-way is that it can be stopped during the action.

Three-position five-way solenoid valve has P-type, E-type, C-type, buy that?

Three-position five-way means that there are three positions and five ventilation holes. Three positions, one pair.

One should be the forward of the cylinder, one should be the back of the cylinder, and the other should be the solenoid valve is in an inactive state. After the solenoid valve A port is energized, the cylinder advances, and after the power is off, the cylinder stops moving. When the B port is energized, the cylinder retreats, and after the power is off, the cylinder stops moving.

To put it simply, it means that the cylinder action is energized, and the cylinder will stop immediately if it is not electrified.