The invention relates to a tower section and to a method for raising said section with a complete new or existing wind turbine on the upper part thereof, the assembly being raised to heights greater than 120 meters by means of a raising system that operates at ground level and gradually inserts modular frame structures through the lower part. The modules have heights between 10 and 14 meters and are formed by a trellis of at least three vertical columns and with diagonal elements which react to the twisting moments and shear forces generated by the action of the wind. A transition part with a base sufficient for raising in wind conditions greater than 15 meters/second is disposed on top of the modules. The raising method has several steps, for example: producing and installing a foundation; assembling the transition part on a connection element of a footing; mounting the wind turbine complete with the tubular tower, nacelle and rotor thereof; installing a lifting system and joining structures on a connection element of the footing; lifting a module N; assembling the different modules; and lastly assembling the final module and removing the automatic raising system.

A wind turbine foundation comprising a concrete support slab having a horizontal rebar grid therein, a concrete pedestal integral with the support slab and having vertical post tensioning elements therein and a plurality of concrete ribs on top of and integral with the support slab and integral with the pedestal, the ribs having rebar therein and extend outwardly from the pedestal, the pedestal, slab and ribs are connected to each other to form a monolithic foundation. The foundation design reduces the weight and volume of materials used, reduces cost, and improves heat dissipation conditions during construction by having a small ratio of concrete mass to surface area thus eliminating the risk of thermal cracking due to heat of hydration.

The invention relates to a guiding device for assembling towers and/or foundations for wind turbines, intended to enable and/or facilitate relative movement between a mobile element and a support element, at least one of said elements being a section and/or part of the shaft of a wind turbine tower or foundation. The guiding device comprises: sliding means that are in contact with the mobile element and allow the relative movement thereof with respect to the guiding device; securing means that connect the guiding device to the support element; and means for geometric adaptation disposed between the sliding means and the securing means, which allow load transmission between the sliding means and the securing means while at the same time also allowing relative movement between the two.

The invention relates to a guiding device for assembling towers and/or foundations for wind turbines, intended to enable and/or facilitate relative movement between a mobile element and a support element, at least one of said elements being a section and/or part of the shaft of a wind turbine tower or foundation. The guiding device comprises: sliding means that are in contact with the mobile element and allow the relative movement thereof with respect to the guiding device; securing means that connect the guiding device to the support element; and means for geometric adaptation disposed between the sliding means and the securing means, which allow load transmission between the sliding means and the securing means while at the same time also allowing relative movement between the two.

A temporary barrier post having a main pole, adjustable post, and bracing shaft. A joint assembly is supported on and can slide axially along the main pole. An end of the adjustable post is connected to the joint assembly such that the adjustable post can rotate relative to the joint assembly. A coupler is fixed to the adjustable post axially between the proximate and remote ends such that the bracing shaft is pivotally connected to the adjustable post. The temporary barrier post is adjustable between an expanded condition, in which the adjustable post extends laterally relative to the main pole, the bracing shaft is oblique relative to the adjustable post, and the adjustable post and the bracing shaft retain the main pole in a set location via the joint assembly, and a collapsed condition, in which the main pole, the adjustable post, and the bracing shaft are parallel.

The ground post support and level device includes a collar, a plurality of legs, and a plurality of post clamps. The ground post support and level device may retain a post upright within a post hole dug into the ground while concrete is poured and sets in the post hole. A plurality of levels located within the collar may aid in aligning the post to be vertical. The plurality of post clamps may removably couple the collar to the post. The plurality of legs may extend from the collar to the ground to elevate the collar and provide clearance for pouring the concrete.

Recyclable cylindrical structures and usage methods are provided. A recyclable cylindrical structure includes multiple prefabricated cylindrical units. Each unit is provided with a ring block coaxially fixed on the top of the unit, a ring slot coaxially formed in the bottom of the unit, two first sealing rings arranged on the top of the unit and a second sealing ring arranged on the top of the ring block of the unit. The ring block is provided with multiple first connection elements. Multiple second connection elements are arranged in the ring slot. For two adjacent prefabricated cylindrical units of the recyclable cylindrical structure, the ring block of the lower unit inserts into the ring slot of the upper unit and the first connection elements of the lower unit are corresponding and jammed one-to-one with the second connection elements of the upper unit.

Recyclable cylindrical structures and usage methods are provided. A recyclable cylindrical structure includes multiple prefabricated cylindrical units. Each unit is provided with a ring block coaxially fixed on the top of the unit, a ring slot coaxially formed in the bottom of the unit, two first sealing rings arranged on the top of the unit and a second sealing ring arranged on the top of the ring block of the unit. The ring block is provided with multiple first connection elements. Multiple second connection elements are arranged in the ring slot. For two adjacent prefabricated cylindrical units of the recyclable cylindrical structure, the ring block of the lower unit inserts into the ring slot of the upper unit and the first connection elements of the lower unit are corresponding and jammed one-to-one with the second connection elements of the upper unit.

A method of retrofitting a wind turbine having a tower and a first energy generating unit with a second energy generating unit. The method includes analyzing a first natural frequency of the tower relative to first rated operation frequencies of the tower having the second energy generating unit; when the first natural frequency lies within the first rated operation frequencies, modifying one or both the tower and the second energy generating unit so that the modified one or both the tower and the second energy generating unit have a second natural frequency and second rated operation frequencies that do not overlap; and replacing the first energy generating unit with the second energy generating unit.

A pneumatic telescopic column assembly for supporting and moving military equipment, communication equipment, lighting equipment and/or surveillance equipment is provided. The pneumatic telescopic column assembly extends along an axis and has a plurality of tube groups telescopically configurable between a compact configuration and an extended configuration. The plurality of tube groups has a base tube group, an intermediate tube group and a head tube group. The base tube group has a base tube element and a base locking ring that has at least one horizontal latch, at least one actuator and at least one vertical latch. The intermediate tube group has an intermediate tubular element and an intermediate locking ring that has at least one horizontal intermediate latch. The tubular head group has a tubular head element.