Servo device of on-line automatic monitoring system for water quality safety

The invention relates to a servo device of an on-line automatic monitoring system for water quality safety. The servo device is characterized by comprising a main water supply pipe, a submersible pump, a sampling cabinet, a main drain pipe and a control device, wherein one end of the main water supply pipe is connected with the submersible pump in a sealing manner, and the other end of the main water supply pipe is connected with a grit chamber and a wushen chamber built in the sampling cabinet in a sealing manner; one end of the main drain pipe is connected with the main water supply pipe in a sealing manner, and the other end of the main drain pipe is positioned outside the sampling cabinet; the control device is arranged in the sampling cabinet and fixedly connected with the sampling cabinet; the grit chamber, an inner water supply pipe, the wushen chamber and a sampling chamber are arranged in the sampling cabinet, and the grit chamber is arranged in a cabinet body, fixedly connected with the cabinet body