Detachable cable anchorage sealing structure and method for realizing anchorage sealing

Abstract

The invention discloses a separable sealing structure of a dragline anchor. The separable sealing structure comprises a sealing structure at an anchor head end and a sealing structure in an anchor head, wherein the sealing structure at the anchor head end comprises an anchor plate, a base plate and an O-shaped sealing ring I arranged on the base plate; the sealing structure in the anchor head comprises a sealing cylinder, a pressing plate, an inner sealing plate, a pressure-bearing cushion cover, an O-shaped sealing ring II, a sealing cushion cover and an outer sealing plate; the pressing plate, the inner sealing plate, the pressure-bearing cushion cover, the O-shaped sealing ring II, the sealing cushion cover and the outer sealing plate are sequentially arranged in the sealing cylinder; a connecting piece comprises a pressing rod, a pressing screw and a tightening screw; the pressing rod penetrates through a through hole II in the anchor plate and a straight-through hole II of the pressing plate, directly reaches a blind hole I of the inner sealing plate and clamps the pressing plate around a shoulder; the pressing screw is tightly attached to the pressing rod for ejecting the pressing rod; the pressing rod ejects the pressing plate; one end of the pressure-bearing cushion cover is tightly attached to the pressing plate and is ejected; the other end of the pressure-bearing cushion cover is tightly attached to the sealing cushion cover and extrudes the sealing cushion cover. The separable sealing structure of the dragline anchor is reliable in sealing; the disassembly and the assembly for multiple times can be realized; the maintenance and the operation are easily realized; meanwhile, steel stranded wires can be singly changed.

Description

technical field [0001] The invention relates to a sealing structure and a method for realizing sealing thereof, in particular to a sealing structure of a cable anchorage and a method for realizing sealing of the anchorage. Background technique [0002] The steel strand clip group anchor is mainly composed of an anchor plate and a clip. The clip is in the shape of a cone, which is two or three pieces. The prestress applied to the steel strand is maintained in the shaped hole; usually the failure of the prestress is often caused by the corrosion of the steel strand and the anchorage. Corrosion of steel strands has been effectively solved in the prior art. Therefore, the anti-corrosion technology of anchorage has become a key research field of prestressing. The anti-corrosion of anchors is divided into external anti-corrosion and internal anti-corrosion. The external anti-corrosion is generally used for anti-corrosion with grease or paint. There are several types of internal ...

AI Technical Summary

Problems solved by technology

[0003] The first is the disclosed sealing structure of "patent announcement number is CN2301582Y name is sealing device", such as Figure 9 , the inner sealing plate 23 is packed into the support tube so that the through holes on it are respectively sleeved on each steel strand 26, and a sealing ring 24 is respectively inserted between each steel strand 26 and the inner sealing plate 23, by pushing The outer sealing plate 25 drives the upper anti-damage sleeve to move and presses the sealing ring 24, so that the sealing ring 24 squeezes into the gap between the steel strand 26 and the through hole of the inner sealing plate 23 and blocks it, thereby realizing the sealing inside the anchorage; The problem with this structure is that the sealing ring itself is not in the groove, and the groove gap is small, and the edge of the groove is sharp. The sealing ring is not only easily scratched and damaged after being pressed, but also not completely filled in the gap tightly after being pressed. The surface of the steel strand is wrapped around the steel strand, and the surface of the steel strand is irregularly round, so the contact area between the sealing ring and the surface of the steel strand is small, the sealing effect is difficult to guarantee, and oil leakage is prone to occur

[0005] 1. Anti-corrosion grease is easy to age and decompose, water vapor and other media are easy to enter, and it is difficult to control the amount of grease squeezed in;

[0006] 2. Because the hole of the sealing plate is slightly larger than the diameter of the steel strand, it is difficult for the steel strand to pass through. Even if it is forced to pass through, it will cause damage to the sealing plate, affect the seal, and cause leakage;

[0007] 3. The requirement of replacing a single steel strand cannot be realized

[0009] 1. The gaps between the anchor plate and the sealing plate and the steel strands are filled with sealant and then cured and sealed. Since the entire structure is solidified into a whole after the glue is installed, it is inconvenient for secondary disassembly and assembly, which affects maintainability

[0010] 2. Using a glue injection machine to inject glue into the gap is not easy to control the amount of sealant injected, and the difficulty of on-site construction operations has not been reduced

[0011] 3. The requirement of replacing a single steel strand cannot be realized

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