Abstract: The invention relates to a autonomous sensing system for train, comprising: an on-board subsystem used for recognizing an obstacle in a rail operation region; a trackside subsystem used for making up limitations in detection distance of sensors of the on-board subsystem and enhancing detection in key regions out of sight; a handheld mobile terminal subsystem carried and operated by a train attendant and used for checking, displaying and confirmation; a center server subsystem used for acquiring operating states and warning information of other subsystems and performing combinational logic processing based on global state data; and a dispatch terminal subsystem communicating with the center server subsystem and used for acquiring and displaying operating states of lineside subsystems and devices, displaying the position of a train and the installation position of the trackside subsystem, checking alarm information of the subsystems and managing the devices of the subsystems.

Abstract: An anti-fall mechanism and a lifting transport apparatus are disclosed. The anti-fall mechanism includes a conveying platform, a linkage, an elastic mechanism, a limit switch and a self-locking mechanism. The conveying platform is installed on a lifting belt. The linkage includes a first coupler, a second coupler and two rockers, where two ends of the first coupler are rotationally coupled to two ends of the second coupler, respectively, via the rockers. The elastic mechanism is arranged between the conveying platform and the lifting belt, where one end of the elastic mechanism is connected to the first coupler, and the other end of the elastic mechanism is pressed by the lifting belt. The limit switch is arranged on the second coupler. The self-locking mechanism is arranged on the conveying platform and capable of locking and securing the conveying platform to a frame of the lifting transport apparatus.

Abstract: An anti-fall mechanism and a lifting transport apparatus are disclosed. The anti-fall mechanism includes a conveying platform, a linkage, an elastic mechanism, a limit switch and a self-locking mechanism. The conveying platform is installed on a lifting belt. The linkage includes a first coupler, a second coupler and two rockers, where two ends of the first coupler are rotationally coupled to two ends of the second coupler, respectively, via the rockers. The elastic mechanism is arranged between the conveying platform and the lifting belt, where one end of the elastic mechanism is connected to the first coupler, and the other end of the elastic mechanism is pressed by the lifting belt. The limit switch is arranged on the second coupler. The self-locking mechanism is arranged on the conveying platform and capable of locking and securing the conveying platform to a frame of the lifting transport apparatus.

Abstract: A fracturing manifold skid and a fracturing manifold skid set are provided. The fracturing manifold skid includes a skid base assembly and a first manifold assembly. The first manifold assembly is installed on the skid base assembly and includes a first transport pipe and a second transport pipe, and a first connecting pipe and a second connecting pipe. The first connecting pipe is connected with the first transport pipe at a first position and connected with the second transport pipe at a second position; the second connecting pipe is connected with the first transport pipe at a third position and connected with the second transport pipe at a fourth position. The first transport pipe is provided with a first valve located between the first and third positions; the second transport pipe is provided with a second valve located between the second and fourth positions.