Printing ink waste gas purifier convenient to install

The utility model discloses a printing ink waste gas purifier convenient to install, which comprises a conveying pipe, the inner wall of the conveying pipe is connected with a scraper in a sliding manner, the top of the scraper is fixedly connected with a stress cover, the bottom of the surface of the inner wall of the stress cover is fixedly connected with a stress plate, and the top of the stress plate is provided with a drain hole. The conveying pipe is arranged, the scraper is plugged into the conveying pipe, then a user sprays water flow into the stress cover, and then the inner wall of the conveying pipe is cleaned under the action of water flow impact. The problems that many impurities adhere to the surface of the inner wall of a used conveying pipe after the conveying pipe is used for a long time, the conveying effect is affected, when cleaning is needed, water is generally sprayed into the conveying pipe, a long-rod brush is stored and plugged into the conveying pipe to clean the inner wall, the clea