Rotary locking device for plane steel gate

The invention discloses a rotary locking device for a plane steel gate. The rotary locking device comprises a rotating mechanism and two locking seat plates arranged on two sides of the top of a concrete gate groove, one end of the rotating mechanism is mounted on a first locking seat plate provided with a stainless steel shaft, the other end of the rotating mechanism is supported on a second locking seat plate through a simple supported wheel, and when the locking device is in a non-locking state, the rotating mechanism can flexibly rotate around the stainless steel shaft and is fixed at a specified position. When the locking device is in the non-locking state, the rotating mechanism can flexibly rotate around the stainless steel shaft and is fixed at a specified position through the self-locking device; and when the locking device is in a locking state, two supporting modes of supporting of a first rubber block and the simple supported wheel and supporting of a locking beam supporting plate are provided, an