The invention discloses a device for detecting the spraying quality of a steel structure, and the device comprises a
tail end telescoping mechanism which is used for adjusting the vertical position of a
tail end
actuator; the stand column
rope outlet mechanisms are evenly distributed on the outer side of the
tail end telescopic mechanism, the flexible
rope ends of the stand column
rope outlet mechanisms are connected with the top end of the tail end telescopic mechanism, and the stand column rope outlet mechanisms are used for adjusting the horizontal position of the tail end
actuator; the tail end anti-swing mechanisms are uniformly distributed and fixedly arranged at the top end of the tail end telescopic mechanism, so that the
flexible cable always keeps a certain pre-tensioning force in the pulling process; the tail end posture adjusting mechanism is used for adjusting the circumferential posture and the pitching posture of the tail end
actuator; the camera is used for performing phase detection on the to-be-detected part; and the
gravity compensation mechanism is used for outputting elastic compensation force matched with the
gravitational torque generated by the tail end posture adjusting mechanism. The device can give consideration to large output torque,
high motion precision and environmental
interference resistance, so that the end
effector is light in load and more flexible in attitude adjustment, and efficient and stable detection is realized.