1、 The importance of vacuum valves in vacuum systems
1. Power switch air supply
As shown in Figure 1, when valves 1 and 4 are closed and valve 2 is opened, the mechanical vacuum pump III vacuum packs container I, and the airflow flows through the pre vacuum extraction pipeline; When valve 2 is closed and valve 4 is opened, the vacuum pump can vacuum pack the diffusion pump separately; When valve 1 and valve 4 are opened at the same time, the diffusion pump and vacuum pump can work simultaneously to pump the container, and at this time, the airflow flows through the diffusion pump. From this, it can be seen that the importance of gate valves in such operations is to switch on the power supply and change the airflow path;
2. Control airflow size
Adjust the vacuum value In Figure 1, adjust the opening angle of the one-way valve of valve 1 to adjust the air flow through the pipeline; Close valve 2 and valve 4, and according to exhaust valve 3, air can be released into the channel of vacuum pump III; Adjust the vacuum value in the container according to exhaust valve 5;
3. Quantitative Analysis Boost
As shown in Figure 2, there is a small hole of a certain size in the plunger pump of the laminated glass valve. When the small hole is turned to the right and connected to the liquefied gas cylinder, the small hole can be filled with high-pressure air; When they are connected to the vacuum pump container on the left side, a certain volume of high-pressure air is also put into the container, which also plays a quantitative analysis of the pumping effect.
2、 The driving forms of vacuum valves mainly include the following methods
Manual vacuum valves are suitable for small and automated vacuum pumps, and are often used in experimental equipment;
2. Magnetic mobile
Magnetic movable vacuum valves are made by magnetizing the iron core with direct current or alternating current, completing the flow coil posture to drive the valve plate for fitness exercise. It is more commonly used for cut-off valves, exhaust valves, etc. in low vacuum pipelines due to the limited arrangement of the new stroke of the streamline coil, small specifications, and fast posture. Both magnetic movable vacuum valves and pneumatic vacuum valves are suitable for defensive field closing valves;
Pneumatic vacuum valves are driven by air compression, with a compact structure and fast power switch. They are mainly used for long-distance operation in large and medium-sized vacuum technology, as well as the application of complex and multi gate vacuum systems. However, due to the need for a separate pneumatic valve, it is not suitable for use in small vacuum systems;
4. Electric and hydraulic
Electric vacuum valve refers to a vacuum valve driven by a motor, while oil pressure type drives the vacuum valve based on the pressure of liquid such as oil. These two types of vacuum valves require high-power vacuum valves, which are commonly used in large and medium-sized industrial production and highly automated vacuum systems.