9 results about "Lift system" patented technology

The invention, which belongs to the technical field of the continuous casting process, relates to a deviation-balancing-based lifting synchronization control method and apparatus of a tundish car. The method comprises the following steps: (1), determining proportional valve dead zones corresponding to four oil cylinders, and calculating dead zone compensation dosages of proportional valves and carrying out outputting; (2), according to deviation of a position setting value and an actual position value, calculating a single cylinder closed-loop controlling quantity and carrying out outputting; (3), on the basis of deviation of a synchronization target value and an actual position, calculating a synchronization closed-loop controlling quantity and carrying out outputting; and (4), calculating a final controlling quantity and outputting the quantity information to the four proportional valves. According to the invention, dead zone compensation is carried out automatically based on the actual parameter change and response speeds of controlled oil cylinders corresponding to the proportional valves are improved. A single-cylinder deviation controller and a synchronous deviation balancer are used for limiting a single-cylinder error and a synchronous error; and thus the control precision is improved and rapid and stable operation of the lifting platform of the tundish car can be guaranteed. Problems of large synchronization deviation of the lifting system of the tundish car, unstable operation, slow hydraulic component speed, and high maintenance cost and the like can be solved.

The invention discloses a garbage bin lifting system for a sweeper, and belongs to the field of sweepers. The garbage bin lifting system comprises a main brush, a garbage bin, a conveying system and a lifting device, wherein garbage on a road surface is thrown in the conveying system by the main brush and is conveyed to the garbage bin by the conveying system; the lifting device comprises a first transverse column, a garbage bin mounting rack, an upright column, a hydraulic cylinder and a lifting rack; the upright column is perpendicularly fixed on the first transverse column of a base plate; one end of the lifting rack is hinged to the bottom of the upright column; and the other end of the lifting rack is hinged to a vertical rod of the garbage bin mounting rack. The garbage bin lifting system is subjected to transmission by connecting rods, the garbage bin is raised automatically by a multi-connecting-rod system and is not required to be loaded or unloaded manually, the time and the labor are saved, the garbage bin can be automatically or manually placed down, and the garbage bin can descend manually by locking a descending device; and a garbage bin supporting plate can rotate outwards at a certain angle, so that a worker can load or unload the garbage bin conveniently.

The invention discloses an additive manufacturing formation cylinder lifting system. The system comprises a cantilever and a cantilever driving mechanism. The cantilever comprises an installing end installed on the cantilever driving mechanism, and a free end for fixing a base plate. The cantilever driving mechanism drives the cantilever to be fed up and down. The invention further discloses a formation cylinder comprising the lifting system and a dynamic sealing system. A longitudinal opening is formed in one side wall of a formation chamber, and the free end of the cantilever penetrates through the longitudinal opening to stretch into the formation chamber. The dynamic sealing system comprises a sealing fin and a transmission mechanism, one end of the sealing fin is fixed to the portion, outside the formation chamber, of the cantilever, the other end of the sealing fin stretches from the upper portion of the cantilever and is fixed to the transmission mechanism, and when the cantilever is fed up and down, the sealing fin is tightly attached to and covers the longitudinal opening part above the cantilever. According to the additive manufacturing equipment with the formation cylinder, the formation height can be greatly increased on the premise that the height is unchanged, and the sealing performance of the formation cylinder is good.

The invention provides an advanced protecting system for support legs of a demountable tanker carrier. The advanced protecting system comprises main cylinders, support leg cylinders, a first electronic-control selector valve, a third electronic-control selector valve, a pressure oil source and a first pressure sensor, the first pressure sensor is used for detecting the pressure of rodless cavities of the support leg cylinders, when the pressure of the rodless cavities of the support cylinders is larger than or equal to a set value, a control signal is transmitted to the first electronic-control selector valve, and the first electronic-control selector valve controls the main cylinders to act when receiving the control signal from the first pressure sensor. By the aid of the advanced protecting system, the support legs are ensured to be completely opened when a lifting system works, and overturning risks are avoided. The invention further provides an advanced protecting method for the support legs of the demountable tanker carrier.