Adjustable embracing column guider based on steel casing positioning

Abstract

The invention relates to the technical field of pile foundation construction equipment, and discloses an adjustable embracing column guider based on steel casing positioning. The adjustable embracing column guider comprises a base, the top end of the base is movably sleeved with a driving ring, the top end of the driving ring is movably sleeved with a fixed clamping ring, the outer surface of the driving ring is provided with a transmission gear block, a helical tooth block is arranged at the top end of the driving ring and located in an inner cavity of the fixed clamping ring, and three fixed connecting rods are evenly arranged at the top of the inner cavity of the fixed clamping ring. According to the adjustable embracing column guider based on steel casing positioning, eccentric structures are arranged between bevel gears I and positioning discs, so that the effective rotating radii of the peripheries of guide sliding rings are conveniently changed in the rotating process of the positioning discs, and the size of the inner diameter of a circle center track among the vertexes of the three guide sliding rings is thus adjusted so as to be suitable for steel casings of different occasion specifications; and meanwhile, the extrusion force of the guider on the steel casings can be flexibly adjusted according to the actual construction environment, and the application range of the guider is greatly widened.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction equipment, in particular to an adjustable column-holding guide based on steel casing positioning. Background technique [0002] In the process of road and bridge construction, pile foundation construction is an important process, and steel casings are set in it to protect the hole piles and prevent them from collapsing. At the same time, they can effectively isolate surface water and guide the drill bit The drill-down trajectory to ensure the normal construction progress of road bridges and their safety during construction. [0003] Moreover, ensuring good verticality of the steel casing during the sinking process has a decisive influence on the construction quality of road bridges. In conventional construction operations, the vertical line of the center of the steel casing should coincide with the center line of the pile, except Unless otherwise specified in the design, the ...

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Problems solved by technology

[0007] The invention provides an adjustable column-holding guider based on steel casing positioning, which has a structural setting that adopts gear transmission for guiding and positioning to avoid the influence of temperature on its guiding and positioning accuracy, and three sets of guiding and positioning are driven by a set of transmission mechanisms The synchronous movement of the mechanism effectively improves the positioning accuracy of the guide, simplifies the control system of the existing guiding and positioning mechanism, has the advantages of high stability and reliability, and solves the problem that the existing guiding and positioning mechanism mainly relies on several sets of hydraulic pressure. The transmission cylinders perform extrusion and positioning actions synchronously on the periphery of the steel casing respectively, which makes the control system of the guiding and positioning mechanism more cumbersome. It is necessary to synchronously control and monitor the pressure and displacement of several groups of hydraulic transmission cylinders to ensure that the steel casing The center vertical line should keep coincident with the center line of the pile. At the same time, the hydraulic transmission oil will be affected by thermal expansion and contraction, which will cause deviations in the displacement of several groups of hydraulic transmission cylinders, resulting in the vertical center of the steel casing. The line should be offset from the pile centerline or the inclination is too large, which will cause the quality of the pile foundation to fail to meet the specified construction requirements and require redesign and construction, which greatly affects the pile foundation. Construction progress, poor stability and reliability

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