Experimental device for rigidizing sodium silicate sand according to VRH-CO2 method

The utility model relates to an experimental device for rigidizing sodium silicate sand according to a VRH-CO2 method, and aims to solve the problem that producing parameter deviation causes waste. The experimental device comprises CO2 gas source, a vacuum chamber and a vacuum pump; the CO2 gas source is communicated with the vacuum chamber through a gas delivery pipe assembled with a barometer, a flowmeter and a valve; the vacuum chamber is communicated with the vacuum pump through a vacuum pipe assembled with a regulating valve and a vacuum meter; the regulating valve is an electromagnetic valve; the vacuum meter is an electronic vacuum meter; when vacuum pressure passing the electronic vacuum meter reaches the set upper limit, the electromagnetic valve is switched off; when the vacuum pressure reaches the set lower limit, the electromagnetic valve is switched on by a magnetic valve control plate which is electrically connected and controls the electromagnetic valve; the gas delivery pipe and the vacuum pip