Please select the most similar patent number from A, B, C and D. Which number is?
A concrete pumping device and control method and device thereof, the control method of the concrete pumping device comprising: when a first pumping of a concrete pump is activated, detecting the preset pumping status of the first pumping of the concrete pump; if the preset pumping status of the first pumping is low pressure pumping, then detecting whether the working parameter of a second pumping is greater than a preset working parameter and/or detecting whether the material supply delay time of the concrete pump is greater than a preset material supply delay time value, wherein the second pumping is the previous pumping of the first pumping; if the working parameter is greater than the preset working parameter and/or the material supply delay time of the concrete pump is greater than the preset material supply delay time value, then controlling the concrete pump to switch from low pressure pumping to high pressure pumping; and after the concrete pump works in the high pressure pumping state for a first preset time, controlling the concrete pump to switch from high pressure pumping to low pressure pumping. The pumping device and the control method and device thereof can properly control the concrete pump when the pumping is activated.
A: A pump stroke control method for a twin-cylinder pump for viscous materials, comprising the following steps: first, determining, according to predetermined condition parameters for a viscous material to be conveyed, a target pump stroke for a twin-cylinder pump for viscous materials corresponding to said parameters; second, by means of adjusting the volume of hydraulic oil in a through-cavity (5 ) of the twin-cylinder pump for viscous materials, adjusting the actual pump stroke (L) of said pump to said target pump stroke. Also provided is a pumping device for viscous materials. The present pump stroke control method is able effectively to implement stepless adjustment of the pump stroke of twin-cylinder pumps for viscous materials, thus allowing the materials-conveying cylinder to avoid a situation of insufficient materials uptake, and thereby increasing pump uptake efficiency while saving energy. The pumping device is structurally simple and easy to operate, and, by reducing the number of invalid strokes of the conveying piston, extends the service life of same.
B: A status monitoring and fault diagnosis system for concrete pumping equipment, comprising a boom sensor assembly (210) installed on the boom for monitoring the operation status of the boom and acquiring a signal, a chassis sensor assembly (220) installed on a chassis (101) for monitoring the operation status of the chassis (101) and acquiring a signal, a hydraulic system sensor assembly (230) installed on a hydraulic system for monitoring the operation status of the hydraulic system and acquiring a signal, a status monitoring unit (310) for analyzing and processing the signals acquired by each sensor assembly so as to monitor the condition of the concrete pumping equipment on line, and a fault diagnosis unit (320) connected with the status monitoring unit (310) for predicting and diagnosing the fault of the concrete pumping equipment. The status monitoring and fault diagnosis system for concrete pumping equipment can comprehensively monitor the operation status and diagnose the fault of the boom, the chassis and the hydraulic system, thus improving the overall performance of the concrete pumping equipment.
C: Provided in the present invention are a concrete ultra-high pumping simulation verification apparatus and method, belonging to the technical field of concrete ultra-high pumping, and being used for verifying the accuracy of a concrete ultra-high pumping simulation model; comprising a testing pipeline connected to the end of a concrete pumping pipe by means of a flange butt joint, and also comprising a rotating impeller system mounted vertically on the inner wall of a vertical pipeline, the rotating impeller system comprising a rotating blade and a rotating shaft arranged in a matched manner, the other end of the rotating blade being provided with a measurement control system, the rotation speed of the blade rotation being measured by means of the measurement control system, and the plastic viscosity and yield stress of the concrete being calculated on the basis of a set fitting formula. Thus, the present apparatus does not require a device such as a pressure sensor to be mounted on the pumping pipe, and can simply and conveniently measure the rheological parameters of the concrete during the concrete pumping process without damaging the safety of the pumping pipe.
D: A wobbler mechanism is used for driving a distributing valve of a concrete pumping device to wobble, and comprises a wobbling arm (6) for driving the distributing valve, and two hydraulic oil cylinders (2, 4) for driving the wobbling arm (6) to wobble from side to side. One end of each of the two hydraulic oil cylinders (2, 4) is connected to left and right sides of the wobbling arm (6), and the hydraulic oil cylinders (2, 4) are two-stage hydraulic oil cylinders (2, 4). Also disclosed is a concrete pumping device having the wobbling mechanism. The wobbling mechanism and the concrete pumping device having the wobbling mechanism is fast in direction change and has a low impact, so that the direction change time of the wobbling mechanism is close to that of a master cylinder of the concrete pumping device, thereby greatly improving pumping continuity.
Answer: A