Novel concentric separate injection flow adjusting mechanism and method

The invention relates to the technical field of oilfield water injection and polymer injection, and particularly relates to a novel concentric separate injection flow adjusting mechanism. The adjusting mechanism is used for underground separate layer water injection and polymer injection, and comprises a first adjusting part and a second adjusting part. The first adjusting part comprises a positioning body and a transmission body arranged in the positioning body. One end of the first adjusting part is connected with one end of the second adjusting part; and the second adjusting part comprises a base body and an adjusting rod, one end of the positioning body is connected with one end of the base body, a containing cavity is formed in the end, connected with the positioning body, of the base body in the direction away from the positioning body and in the length direction of the base body, the adjusting rod is arranged in the containing cavity, and one end of the adjusting rod is connected with the end, close to