Cable corrosion-proof sealing structure with anchor box structure at beam end

Abstract

The utility model relates to a cable anticorrosion sealing structure for beam end being anchor box structure belongs to cable -stayed bridge technical field. Including cable, the cable one end is equipped with beam end anchor box and is anchored in anchor tool, the beam end anchor box outside is equipped with anchor tool protection cover, the anchor tool cover is located in anchor tool protection cover, the cable periphery that is equipped in the beam end anchor box is equipped with anticorrosive layer, the cable periphery is equipped with waterproof cover, waterproof cover is equipped in anticorrosive layer, waterproof cover one end is close to anchor backing plate, waterproof cover other end is equipped with sealing cover, sealing cover one end is built on waterproof cover end, sealing cover other end is pasted to cable outer surface. Waterproof cover inner wall is equipped with water baffle ring, the water baffle ring is equipped at waterproof cover and anchor backing plate junction, water baffle ring one end is bonded in anchor backing plate inner side. Water baffle ring bottom is equipped with drain hole. The application carries out sealing, waterproof and anticorrosion protection to exposed anchor tool, cable, avoids being exposed in the air, improves the service life.

Description

Technical Field

[0001] This utility model relates to a cable anti-corrosion sealing structure for a beam end anchor box structure, belonging to the field of cable-stayed bridge technology. Background Technology

[0002] Cable guide tubes are critical force-transmitting and protective components in cable-stayed bridges, primarily located in the bridge towers (tower ends) and the main girder anchorage zone (short tubes at the girder ends). In fully welded steel box girder structures, cable anchorage can be designed directly on the outside of the girder (e.g., anchored to anchor boxes or ear plates extending from the steel box girder). In this case, the anchorages are directly exposed to the air outside the box girder. Due to the relatively complex structure of the anchor box, waterproof sealing is more difficult compared to the girder ends with cable guide tubes. Some cable-stayed bridges with anchor box structures do not have waterproof protection at the cable ends, leaving them directly exposed to the air. Over time, this can easily lead to anchorage corrosion, reducing their service life. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a cable anti-corrosion sealing structure for a beam end anchor box structure, which seals and protects the anchor and cable from corrosion, avoids exposure to air, and improves service life.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: a cable anti-corrosion sealing structure for a beam end anchor box structure, including a cable, one end of which passes through the beam end anchor box and is anchored in the anchor, the outside of the beam end anchor box is provided with an anchor protective cover, and the anchor is covered in the anchor protective cover; the cable in the beam end anchor box is provided with an anti-corrosion layer on its outer periphery, and a waterproof cover is fitted on the outer periphery of the cable, the waterproof cover is provided outside the anti-corrosion layer, one end of the waterproof cover is tightly attached to the anchor plate, and the other end of the waterproof cover is provided with a sealing cover, one end of the sealing cover is attached to the end of the waterproof cover, and the other end of the sealing cover is attached to the outer surface of the cable.

[0005] The inner wall of the waterproof cover is provided with a water-blocking ring, which is located at the joint surface between the waterproof cover and the anchor plate. One end of the water-blocking ring is bonded to the inner side of the anchor plate.

[0006] The water-retaining ring has a drainage hole at its bottom.

[0007] The waterproof cover has a waterproof sealing ring on the inner wall of one end and a waterproof sealing strip on the inner wall of the other end.

[0008] The inner wall of the large end of the sealing cover is provided with a large end sealing strip, and the inner wall of the small end of the sealing cover is provided with multiple small end sealing rings arranged at intervals.

[0009] The anchorage protection cover is a visual anchorage protection cover.

[0010] Compared with the prior art, the advantages of this utility model are: a cable anti-corrosion sealing structure for beam ends with anchor boxes provides sealing, waterproofing and anti-corrosion protection for exposed anchors and cables, avoiding exposure to air and improving service life. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a cable anti-corrosion sealing structure for a beam end anchor box structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a waterproof cover; Figure 3 This is a schematic diagram of a water-retaining ring; Figure 4 This is a schematic diagram of the installation of the sealing cover; In the figure, 1 is the anchorage protective cover, 2 is the anchor plate, 3 is the water-retaining ring, 3.1 is the drainage hole, 4 is the OTC anti-corrosion layer, 5 is the waterproof cover, 5.1 is the waterproof sealing ring, 5.2 is the waterproof sealing strip, 6 is the sealing cover, 6.1 is the small end sealing ring, 6.2 is the large end sealing strip, 7 is the cable, and 8 is the beam end anchor box. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0013] like Figure 1 As shown in this embodiment, a cable anti-corrosion sealing structure for a beam end anchor box structure includes a cable 7. One end of the cable 7 passes through the beam end anchor box 8 and is anchored inside an anchor. An anchor protective cover 1 is provided on the outside of the beam end anchor box 8, covering the anchor and protecting the exposed surface of the anchor. An OTC anti-corrosion layer 4 is provided on the outer periphery of the cable inside the beam end anchor box 8, which has the functions of rust removal, rust prevention, and sealing. A waterproof cover 5 is fitted around the cable 7. The waterproof cover 5 is covered with the OTC anti-corrosion layer 4. The large end of the waterproof cover 5 abuts against the inner side of the anchor plate 2, and the small end of the waterproof cover 5 is provided with a sealing cover 6. The sealing cover 6 is fitted on the outer surface of the cable 7, with the large end of the sealing cover 6 fitted onto the small end of the waterproof cover 5, and the inner wall of the small end of the sealing cover 6 is in contact with the outer surface of the cable 7. The inner wall of the waterproof cover 5 is provided with a water-blocking ring 3. One end of the water-blocking ring 3 is bonded to the inner side of the anchor plate 2. The function of the water-blocking ring is to prevent rainwater at the joint surface between the anchor plate and the waterproof cover from flowing into the anchor protective cover and forming water accumulation.

[0014] The aforementioned OTC anti-corrosion layer is available for purchase. The OTC anti-corrosion layer consists of a corrosion-inhibiting layer, a release-inhibiting layer, and an outer protective layer, arranged sequentially from the inside out, all three layers tightly bonded together. The corrosion-inhibiting layer is made of an oxidative polymer corrosion-inhibiting paste, possessing both rust removal and rust prevention functions. It transforms existing rust on the steel surface into a dense and stable tetravalent iron oxide film, forming a self-protective corrosion-inhibiting layer. The release-inhibiting layer is made of an oxidative polymer release-inhibiting tape, which wraps around the corrosion-inhibiting layer. This tape has excellent sealing properties, isolating the metal surface from corrosive agents such as moisture, salt, and air, thus achieving optimal shielding performance and providing double protection against rust. The outer protective layer is made of an external protective agent, placed on the surface of the release-inhibiting layer. Upon contact with oxygen, the external protective agent polymerizes in a short time to form a tough film, creating a good seal and effectively preventing rainwater and other corrosive media from entering.

[0015] like Figure 2 As shown, the waterproof cover is a two-half structure made of stainless steel. The waterproof cover protects the OTC anti-corrosion layer surface and also serves an aesthetic purpose. During installation, the waterproof cover encloses the entire connecting cylinder assembly, followed by welding, grinding, and polishing. A 2mm thick waterproof sealing ring 5.1, made of rubber, is affixed to the inner wall of the large end of the waterproof cover. A waterproof sealing strip 5.2, made of foamed silicone rubber, is affixed to the inner wall of the small end of the waterproof cover to prevent noise caused by vibration between the waterproof cover and the cable body surface. The waterproof sealing strip 5.2 also prevents rainwater from blowing into the waterproof cover from the small port. The waterproof cover can be made into a cylindrical or variable cross-section frustum structure according to landscape requirements.

[0016] like Figure 3 As shown, the water-retaining ring is a two-half Haval structure made of 3mm thick stainless steel. During installation, the two Haval components are first welded together. The outer surface of the water-retaining ring is attached to the inner wall of the waterproof cover, and one end of the ring is adhesively bonded to the anchor plate. The perimeter of the ring is sealed with Sika sealant. A drainage hole 3.1 is provided on the water-retaining ring, located at the lowest point of the ring's bottom for easy rainwater drainage.

[0017] like Figure 4 As shown, the sealing cover is made of 20 steel or stainless steel, and its surface is treated with hot-dip galvanizing or powder zinc infiltration. Two spaced-apart small-end sealing rings 6.1 are provided on the inner wall of the small end of the sealing cover. The diameter of the small-end sealing rings 6.1 is 10mm, and they are made of silicone rubber for waterproof sealing. A large-end sealing strip 6.2 is provided on the inner wall of the large end of the sealing cover. The large-end sealing strip 6.2 is made of 12×13mm silicone rubber and is used for positioning.

[0018] The sealing cover overlaps the outer perimeter of the small end of the waterproof cover. When rainwater flows down the surface of the cable, the sealing cover intercepts the rainwater and prevents it from flowing to the part where the waterproof cover and the cable meet, thus preventing rainwater from seeping into the waterproof cover.

[0019] The seal between the sealing cover and the cable relies on the compression deformation of the small-end sealing ring to achieve waterproofing. The small-end sealing ring, made of silicone rubber, has excellent aging resistance and is easy to replace. To better accommodate errors in the cable diameter, a large-diameter sealing ring is selected for the small end to ensure ideal sealing performance under various conditions.

[0020] The anchorage protection cover is a visual anchorage protection cover, consisting of a cover body and a visual resin panel. The visual resin panel is located at the bottom of the cover body. The cover body is made of carbon steel or stainless steel, and the visual resin panel is used to observe the water accumulation and surface condition inside the anchorage during operation.

[0021] This application provides sealing, waterproofing, and corrosion protection for exposed anchors and cables, preventing them from being exposed to air and thus extending their service life.

[0022] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A cable anti-corrosion sealing structure for beam ends with anchor boxes, characterized in that: The system includes a cable, one end of which passes through a beam-end anchor box and is anchored inside an anchorage. An anchorage protective cover is provided on the outside of the beam-end anchor box, and the anchorage is housed inside the anchorage protective cover. The cable inside the beam-end anchor box has an anti-corrosion layer on its outer periphery, and a waterproof cover is fitted around the cable's outer periphery. The waterproof cover is located outside the anti-corrosion layer, with one end of the waterproof cover tightly attached to the anchor plate and the other end of the waterproof cover having a sealing cover. One end of the sealing cover overlaps the end of the waterproof cover, and the other end of the sealing cover is attached to the outer surface of the cable.

2. The cable anti-corrosion sealing structure for a beam end anchor box structure according to claim 1, characterized in that: The inner wall of the waterproof cover is provided with a water-blocking ring, which is located at the joint surface between the waterproof cover and the anchor plate. One end of the water-blocking ring is bonded to the inner side of the anchor plate.

3. The cable anti-corrosion sealing structure for a beam end anchor box structure according to claim 2, characterized in that: The water-retaining ring has a drainage hole at its bottom.

4. The cable anti-corrosion sealing structure for a beam end anchor box structure according to claim 1, characterized in that: The waterproof cover has a waterproof sealing ring on the inner wall of one end and a waterproof sealing strip on the inner wall of the other end.

5. A cable anti-corrosion sealing structure for a beam end anchor box structure according to claim 1, characterized in that: The inner wall of the large end of the sealing cover is provided with a large end sealing strip, and the inner wall of the small end of the sealing cover is provided with multiple small end sealing rings arranged at intervals.

6. The cable anti-corrosion sealing structure for a beam end anchor box structure according to claim 1, characterized in that: The anchorage protection cover is a visual anchorage protection cover.

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