A method for coating a support with a lightweight insulating shotcrete, includes preparing the shotcrete by mixing, in predetermined proportions, at least a fibrous aggregate, a binder and water; pouring the prepared shotcrete in a tank; having at least one outlet; continuously moving the wet shotcrete in the tank until it reaches the or each outlet; sucking the wet shotcrete along a feeding pipe linking the outlet of the tank to a spraying gun, with a Venturi hose fed with pressurized air, included in the spraying gun; spraying the sucked shotcrete on the support with the spraying gun.

A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic actuator (110), first and second counter-balance valves (300, 400), first and second control valves (700, 800), and first and second blocking valves (350, 450). A net load (90) is supported by a first chamber (116, 118) of the hydraulic actuator, and a second chamber (118, 116) of the hydraulic actuator may receive fluctuating hydraulic fluid flow from the second control valve to produce a vibratory response (950) that counters environmental vibrations (960) on the boom. The first blocking valve prevents the fluctuating hydraulic fluid flow from opening the first counter-balance valve. The first blocking valve may drain leakage from the first counter-balance valve.

A system for compensating for drift or movement of a hydraulic actuator connected to a machine's boom or similar elongate member that is caused, at least in part, by damping of mass-induced vibration. The system comprises a processing unit and a plurality of sensors operable to collect data from a control valve connected to an actuator's load holding chamber and to calculate additional volume present therein due to vibration damping. Using the calculated additional volume, the processing unit determines a hydraulic fluid flow rate appropriate to substantially reduce or eliminate the additional volume. The processing unit combines this flow rate with the hydraulic fluid flow rate necessary to cause operation of the actuator in response to the machine's operator input, and provides signals to the control valve causing actuation of the valve to output hydraulic fluid to the actuator at a rate equal to the combined flow rates.

The invention relates to a truck-mounted concrete pump having at least one travelling-drive motor and a hydraulic pumping device for delivering liquid concrete, wherein at least one electric motor is provided and the hydraulic pumping device can be driven either by the at least one travelling-drive motor or the at least one electric motor, characterized in that the travelling-drive motor is connected by way of a power take-off of a transfer gearbox of the travelling-drive train of the truck-mounted concrete pump to a branching gearbox, with a first gearbox input of the branching gearbox being coupled with the power take-off of the travelling-drive motor and a second gearbox input being coupled with the electric motor, and the gearbox output of the branching gearbox being connected to at least one hydraulic pump of the hydraulic pumping device.

A method of constructing a tower is provided, the method including the steps of providing an elevation mechanism including a dynamic engaging mechanism realized to engage with a tower surface, arranging a 3D printing device on the elevation means, actuating the dynamic engaging mechanism to effect a vertical elevation of the elevation mechanism, actuating the 3D printing device to deposit an essentially horizontal material layer including at least a tower body region, and repeating the steps to obtain a tower structure. A tower constructed using such a method, and a 3D tower printing apparatus, is also provided.

In a sectional-type high wear-resistant double-layer straight tube and a method for preparing the same, the double-layer straight tube includes a protective outer tube and a sectional-type wear-resistant inner tube. The protective outer tube is nested outside of the sectional-type wear-resistant inner tube; the sectional-type wear-resistant inner tube includes at least two wear-resistant inner tube sections; and the wear-resistant inner tube sections are connected sequentially. The sectional-type wear-resistant inner tube at least includes a left inner tube section, a right inner tube section, and one or more middle inner tube section. The wear-resistant straight tube can greatly prolong the service life of the pipeline so that the cost performance of the pipeline is increased by more than a few times. It would also easily achieve mass production, the quality is stable and reliable, and the safety performance is high.

The invention relates to a system (10) comprising at least one first device (20) movable in a controlled manner and at least one second device (27), which is arranged on said at least one first device, for applying material. In order to produce complex structures in a simple manner, according to the invention, the at least one first device (20) movable in a controlled manner is formed by an aircraft (20) provided with at least one rotor (21), which aircraft comprises at least one container (231; 232) for storing the material.

The invention relates to a method and to a delivery apparatus for carrying out the method, wherein the delivery apparatus comprises an eccentric screw pump having a rotor-stator unit with an outlet, a drive unit, a control device and a delivery section, and wherein the delivery apparatus comprises at least one pressure sensor and a characteristic-variable detection device.

A method of slip forming a concrete structure can include using a first slip form mold that travels along a path to form a portion of a concrete structure by delivering a first flow of concrete into the first mold through a first hopper. The first hopper can be configured to receive the first flow of concrete. The portion of the concrete structure can be modified using a second slip form mold different from the first mold by advancing the second mold along the concrete structure and, while advancing the second mold, delivering a second flow of concrete into the second mold through a second hopper that is configured to receive the second flow of concrete.

The supporting structure for a mobile concrete pump for connecting a distribution boom includes two support leg boxes that cross each other diagonally, and a boom pedestal attached thereto having a turret that has an opening that is surrounded at its one end at least partially by a pivot mount receptacle for a pivot bearing for pivoting the distribution boom of the concrete pump with respect to the turret. Part of the wall of the turret is formed by a side wall of the supporting leg boxes that cross each other, wherein the side walls of the supporting leg boxes are, in a first region in which same form part of the wall of the turret, free of joining points such that loads introduced via the turret directly into the side walls are distributed beyond the first region without shear load of a joining point in the side walls.