Pressure blocking device

[0044] figure 1 A schematic diagram showing the structure of a pressure barrier device according to an exemplary embodiment of the present invention, Figure 2a and Figure 2b The gas circuit connection diagrams of the first state and the second state of the six-way valve are shown respectively.

[0045] Such as figure 1 , Figure 2a and Figure 2b As shown, the pressure barrier device consists of:

[0046] A six-way valve 9, the six-way valve 9 includes first to sixth ports, the second port 11 is used as a medium inlet, the fifth port 14 is used as a medium outlet, and the fourth port 13 communicates with the sixth port 15;

[0047] The first operating assembly includes a first chamber 1, a first piston 2 and a first drive mechanism (not shown), the first piston 2 is arranged in the first chamber 1, and the first chamber 1 is divided into first sub-chambers chamber and the second sub-chamber, the first sub-chamber is provided with a first vent 3, the first vent 3 commun...