Sample reserving device for online monitoring of water pollution source

The utility model discloses a sample reserving device for on-line monitoring of a water pollution source, relates to the field of sample reserving of the water pollution source, and provides the following scheme aiming at the problems that an existing sample reserving device is difficult to disassemble and assemble, low in sample reserving accuracy, poor in effect and easy to cause resource waste. An observation window is formed in the side wall of the sample reserving pipe, sealing covers are arranged at the two ends of the sample reserving pipe, a connecting plate is installed on the side, close to the sealing covers, of the sample reserving pipe, a connecting needle pipe is arranged on the side, away from the observation window, of the sample reserving pipe, and a rubber seal is arranged on the side, close to the connecting needle pipe, of the sample reserving pipe. A flow guide tube is mounted on one side, far away from the sample reserving tube, of the connecting needle tube, and a control valve is arran