Grid hedging type labyrinth piece and regulating valve thereof

The utility model relates to a grid hedging type labyrinth piece and a regulating valve thereof, which comprise a piece body, N circles of round hole groups are arranged on the end face of the piece body, the circle center of each round hole group is concentric with the circle center of the piece body, and N is an integer greater than or equal to 2; each round hole group comprises a round holes of which the circle centers are positioned on the same circle; the diameter of the round holes in the bth round hole group is c, the diameter of the round holes in the (b-1) th round hole group is d, and 1gt; b > = N, cgt; d; each round hole in the (b-1) th round hole group is provided with two flow channels in an extending manner, and the two flow channels are correspondingly connected with two adjacent round holes in the bth round hole group respectively; a first flow channel; two second flow channels; according to the scheme, the medium flow direction is changed while the medium energy is dispersed through the mediu