A movable steel strand threading guide device and its application method

Abstract

The invention reLates to a movabLe guide device for steeL strand threading and a use method thereof. The device incLudes a frame, a guide roLLer, a jacking device and a frame Lifting device. The frameis composed of a Lower framework, an upper framework and a Lifting device. The guide roLLer is Located in the constituted frame, and the Lifting device incLudes a threaded jack, a threaded sLeeve, ajack rod and a Lifting-device oiL cyLinder. The jacking device comprises a butt pLate and a jack oiL cyLinder, and the Lifting device, a guide rod, the butt pLate and a steeL tube bundLe bearing pLateare butted together. The frame Lifting device comprises an operation vaLve and a hydrauLic pump station and is used for controLLing the frame to ascend or descend. The device can effectiveLy soLve the probLem existing in threading of Large tonnage steeL strand bundLes dragged by a Large tractor in narrow space, operation is simpLe, instaLLation is easy and convenient, the device can move fast, the situation that the Large tractor is difficuLt to move during traction of each steeL strand is avoided, and unsafe factors occurring in the threading process are avoided.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a movable beam-threading guide device for steel strands and an application method thereof. Background technique [0002] With the vigorous development of my country's third-generation nuclear power and the wide application of prestressing technology, when the vertical inverted U-shaped prestressed beam of the containment prestressed system of Hualong No. 1 is constructed through the beam, the prestressed steel conduit has a large curvature and a long length , the tonnage of the steel strand bundle is large. When the existing ordinary steel strand threading method is used, the threading resistance is too large and the steel strand is too long to meet the threading requirements. A large hoist must be used for the overall threading. However, due to the space When the hoist is directly pulled at the bottom of the steel pipe, the space is narrow, the installation is inconv...

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Problems solved by technology

[0002] With the vigorous development of my country's third-generation nuclear power and the wide application of prestressing technology, when the vertical inverted U-shaped prestressed beam of the containment prestressed system of Hualong No. 1 is constructed through the beam, the prestressed steel conduit has a large curvature and a long length , the tonnage of the steel strand bundle is large. When the existing ordinary steel strand threading method is used, the threading resistance is too large and the steel strand is too long to meet the threading requirements. A large hoist must be used for the overall threading. However, due to the space When the hoist is directly pulled at the bottom of the steel pipe, the space is narrow, the installation is inconvenient, the operation is difficult, and if there is any abnormality in the process of threading the beam, it is very difficult and dangerous to deal with, and the result often brings great economic losses to the construction and cause quality and safety risks

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