Intermediate gas concentration-regulating piston pressure device for high-temperature autoclave and gas distribution method

An intermediate gas concentration-regulating piston pressure device for a high temperature autoclave, comprising:

• a gas concentration-regulating piston pressure device and a high temperature autoclave (21), wherein
• the gas concentration-regulating piston pressure device comprises a plug (1), a cylinder (5), a piston (6), a base (8), an oil tank (12,) an oil pipe, a gas inlet pipeline (14), a gas outlet pipeline (15), a vacuum pump (17), a four-way valve (18) and a high temperature autoclave ventilation connection pipeline (19);
• the piston (6) is arranged in the cylinder (5);
• an opening in an upper end of the cylinder (5) is sealed by the plug (1);
• and the plug (1) is fixed on the cylinder (5) via a screw (3);
• a concentration probe (4) and a ventilation connection pipeline (2) are mounted on the plug (1), both penetrate through the plug (1) and are communicated with an interior of the cylinder (5);
• the concentration probe (4) is used for detecting a gas concentration inside the cylinder (5);
• and when an injected gas is a single gas, a concentration of the injected gas is acquired by the concentration probe (4);
• and the ventilation connection pipeline (2) is further provided with a gas inlet valve (13);
• an oil transport hole is formed in a lower end of the cylinder (5);
• an oil pump (11) is arranged in the oil tank (12);
• two ends of the oil pipe are respectively connected to the oil pump (11) and the oil transport hole;
• the oil pipe is further provided with a control valve (10) and a flowmeter (9);
• the oil pump (11) is used for pumping oil in the oil tank (12) into the cylinder (5);
• and the piston (6) is pushed onto a top of the cylinder (5);
• the other end of the ventilation connection pipeline (2) is connected to the four-way valve (18);
• and the gas inlet pipeline (14), the ventilation connection pipeline (2), the gas outlet pipeline (15) and the high temperature autoclave ventilation connection pipeline (19) are connected onto the four-way valve (18);
• the four-way valve (18) can open or close any one or more valve ports;
• the gas inlet pipeline (14) is connected to a booster pump (16) for boosting the concentration-regulating piston pressure device;
• the gas outlet pipeline 15 is connected to a vacuum pump (17) for vacuumizing the concentration-regulating piston pressure device;
• the high temperature autoclave ventilation connection pipeline (19) is connected to the high temperature autoclave (21);
• and a valve (20) is mounted on the high temperature autoclave ventilation connection pipeline (19);
• a base (8) is mounted at the bottom of the cylinder (5) for fixing the whole concentration-regulating piston pressure device;
• a concentration probe (22) is arranged in the high temperature autoclave (21) to monitor a concentration of gases inside the autoclave in real time;
• the high temperature autoclave (21) is further provided with an exhaust valve (23).