Buffer circuit

Buffer circuit

Figure 1 is a buffer circuit which is matched by one-way throttle valve and travel valve. When the piston moves to the predetermined position and presses down the travel valve, the air flow in the exhaust cavity of the cylinder can only pass through the throttle valve, which slows down the piston speed and achieves the purpose of buffer. This circuit is often used in cylinders with large inertia force.

Figure 2 shows two types of buffer circuits. Figure a shows the buffer circuit with the combination of the mechanical control valve and the flow control valve. When the cylinder extends out, the air in the rod cavity is discharged through the two position two-way mechanical control valve and the two position five way valve. The air in the rod cavity is discharged through the throttle valve to realize the buffering of the cylinder movement. Changing the installation position of the mechanical control valve can change the starting time of buffering.

The buffer circuit shown in Figure B is realized by using sequence valve. When the cylinder returns to the end of the stroke, the pressure of the rodless chamber has dropped to the point where the sequence valve can not be opened, and the residual air in the chamber can only be discharged through the throttle valve, so that the movement of the cylinder can be buffered. This circuit is often used in the situation of long cylinder stroke and high speed.