Integral squeezing steel strand anchorage stay rope and manufacturing method thereof

Abstract

The invention provides an integral squeezing steel strand anchorage stay rope and relates to a prestress stay rope and a manufacturing method thereof. The stay rope comprises a steel strand finished stay rope and an internal squeezing stay rope anchorage. The internal squeezing stay rope anchorage comprises a squeezing anchor cup, an adjusting nut and a sealing drum. A threaded hole, a taper hole and a straight hole are arranged in the squeezing anchor cup in sequence. A clamping piece is arranged in the taper hole. The conical degree of the outer surface of the clamping piece is identical with that of the inner surface of the taper hole. Steel strand holes are disposed in the clamping piece. Threads are arranged inside each steel strand hole. Sealant is filled between bare steel strands and the straight hole of the squeezing anchor cup and an inner hole of the sealing drum. The manufacturing method comprises the follow steps: (A) machining every part, component and the steel strand finished stay rope, (B) assembling, (C) threading the steel strands and installing the clamping piece, (D) squeezing, (E) installing an anti-loose screw plug, (F) sealing and filling the sealant. The integral squeezing steel strand anchorage stay rope and the manufacturing method thereof can reduce machining difficulty and production cost, and is reliable in anchoring performance and applicable for different specifications of the steel strands.

Description

technical field [0001] The invention relates to a prestressed cable and a manufacturing method thereof, in particular to an integrally extruded steel strand anchor cable and a manufacturing method thereof. Background technique [0002] At present, the entire bundle of extruded steel strand anchorage cables in China generally adopts the external extruded structure (see figure 1 ), compress the steel strands in the extruded anchor cup 4 by external extrusion, so as to achieve the anchoring effect. But the threads on the extruded anchor cup 4 are processed after extrusion, so it is difficult to process threads with relatively long drag cables. If the drag cables are 100 meters long, the drag cables 5 need to be supported by several supports. , installed to the end of the lathe, and then the thread on the anchor cup can be turned and squeezed, and when the thread is processed, the entire 100-meter-long cable needs to be rotated as a whole to turn the thread, and this steel stra...

AI Technical Summary

Problems solved by technology

But the threads on the extruded anchor cup 4 are processed after extrusion, so it is difficult to process threads with relatively long drag cables. If the drag cables are 100 meters long, the drag cables 5 need to be supported by several supports. , installed to the end of the lathe, and then the thread on the anchor cup can be turned and squeezed, and when the thread is processed, the entire 100-meter-long cable needs to be rotated as a whole to turn the thread, and this steel strand is whole The extrusion process of beam extrusion anchorage cables is also relatively complicated, and the extrusion molds used for extrusion are also very expensive. Since the extrusion molds are made of hard alloy, a larger mold costs 50,000 yuan. More than RMB 1,000, and the service life is short, one extrusion die is only used to extrude about 200 extrusion anchor cups and needs to be scrapped due to wear and tear, so the production cost is relatively high

In addition, the existing steel strand extruded anchor cables are only suitable for ordinary prestressed steel strands and monofilament coated epoxy steel strands (epoxy coating is not less than 0.13mm), and its scope of application is relatively narrow

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