Sealing structure of rigid-flexible transition section of inhaul cable

Abstract

The utility model discloses a sealing structure of a rigid-flexible transition section of an inhaul cable, which comprises a connecting cylinder, a cable body, a winding layer and a solidifying layer, the cable body is connected with the connecting cylinder, the cross section of the connecting cylinder is larger than that of the cable body, a step is formed at the joint of the connecting cylinder and the cable body, and the solidifying layer is arranged in the step. The winding layer is formed by winding a sealing tape on the concave part of the step, the concave part of the step is filled and leveled up by the winding layer, and the curing layer covers the winding layer and covers the connecting cylinder and the cable body around the winding layer. And the inhaul cable body and the anchor head transition section can be protected from being damaged in the transportation and installation processes.

Description

Technical Field

[0001] The utility model relates to the field of prestressing, in particular to a sealing structure of a rigid-flexible transition section of a cable. Background Art

[0002] The bridge cable is mainly composed of the cable body and the anchor head, which is the main load-bearing component of the bridge. If the seal fails, the cable anchor head and the load-bearing steel in the cable body will be corroded by external corrosion factors such as moisture. Therefore, the sealing structure between the cable body and the anchor head directly affects the service life of the cable. The cable is soft and bendable, and the cable is fixed at the anchor head. The vibration of the cable will cause vibration at the connection between the cable and the anchor head, destroying the seal there, which is easy to cause the seal failure at the connection, affecting the service life of the cable.

[0003] However, the existing cable end sealing structure (CN101545243A) uses a heat shrink sleeve or heat shrink tape to seal the transition between the cable body and the cable anchor connection tube, and then wraps a colored fluorinated film tape around it. The shrink sleeve or heat shrink tape and fluorinated film tape of this structure are all easily damaged materials, but due to the heavy weight of the cable itself, it needs to use lifting and traction equipment during transportation and installation, which can easily cause the heat shrink sleeve or heat shrink tape and fluorinated film tape to break, resulting in sealing failure. Utility Model Content

[0004] The utility model aims to provide a sealing structure of a rigid-flexible transition section of a cable, which can protect the cable body and the anchor head transition section from being damaged during transportation and installation.

[0005] A sealing structure for a rigid-flexible transition section of a cable comprises: a connecting tube, a cable body, a winding layer, and a solidified layer. The cable body is connected to the connecting tube, the cross-section of the connecting tube is larger than the cross-section of the cable body, the connection between the connecting tube and the cable body forms a step, the winding layer is formed by a sealing tape wound around a depression of the step, the winding layer fills the depression of the step, and the solidified layer covers the winding layer and covers the connecting tube and the cable body around the winding layer.

[0006] In one embodiment, a first adhesive layer is provided between the solidifying layer and the connecting tube; or a second adhesive layer is provided between the solidifying layer and the cable body.

[0007] In one embodiment, the first adhesive layer does not extend to the outer surface of the wrapping layer; or the second adhesive layer does not extend to the outer surface of the wrapping layer.

[0008] In one embodiment, the outer wall of the connecting tube, the outer wall of the winding layer, and the outer wall of the cable body form a continuous surface.

[0009] In one embodiment, the outer wall of the winding layer is tapered.

[0010] In one embodiment, the solidified layer is a polyurea material layer.

[0011] Compared with the prior art, the sealing structure of the cable rigid-flexible transition section of the utility model has the following advantages:

[0012] 1. Use sealing tape to fill the depression between the connecting tube and the cable, flatten the surface of the connecting tube and the cable, so that the solidified layer can be evenly spread on the outer surface of the connecting tube, the winding layer, and the cable body to ensure the sealing effect of the solidified layer.

[0013] 2. When the cable vibrates, the sealing tapes wrapped together rub against each other to produce damping, which can slow down the vibration of the cable body and transmit it to the connecting tube, so that the vibration occurs more in the cable body rather than at the connection between the cable body and the connecting tube. In this way, the winding layer can achieve sealing while avoiding the wear of the solidified layer caused by the lack of synchronization between the cable body and the connecting tube when the cable vibrates, thereby ensuring the normal operation of the solidified layer.

[0014] 3. The outer wall of the connecting tube, the outer wall of the winding layer, and the outer wall of the cable body form a continuous surface. There are no depressions, faults, or steps, so that the solidified layer can form a continuous surface when solidified thereon, avoiding sudden changes in the thickness of the solidified layer and sealing weaknesses.

[0015] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the sealing structure of the rigid-flexible transition section of the cable according to an embodiment of the utility model.

[0018] Among them, 1. connecting tube, 2. first adhesive layer, 3. curing layer, 4. winding layer, 5. second adhesive layer, 6. cable body. DETAILED DESCRIPTION

[0019] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1 As shown, the sealing structure of the rigid-flexible transition section of the cable in this embodiment is characterized by comprising: a connecting tube 1, a cable body 6, a winding layer 4, and a solidified layer 3. The cable body 6 is connected to the connecting tube 1. The cross section of the connecting tube 1 is larger than the cross section of the cable body 6. The connection between the connecting tube 1 and the cable body 6 forms a step. The winding layer 4 is formed by a sealing tape wound around the concave part of the step. The winding layer 4 fills the concave part of the step. The solidified layer 3 covers the winding layer 4 and covers the connecting tube 1 and the cable body 6 around the winding layer 4. The concave part between the connecting tube 1 and the cable is filled by winding the sealing tape, and the surface of the connecting tube 1 and the cable is flattened, so that the solidified layer 3 can be evenly spread on the outer surface of the connecting tube 1, the winding layer 4, and the cable body 6, to ensure the sealing effect of the solidified layer 3. Furthermore, when the cable vibrates, the sealing tapes wound together rub against each other to generate damping, which can slow down the transmission of vibration of the cable body 6 to the connecting tube 1, causing the vibration to occur more in the cable body 6 rather than at the connection between the cable body 6 and the connecting tube 1. In this way, the winding layer 4 can achieve sealing while avoiding wear of the solidified layer 3 caused by the cable body 6 and the connecting tube 1 being out of sync when the cable vibrates, thereby ensuring the normal operation of the solidified layer 3.

[0023] A first adhesive layer 2 is provided between the solidified layer 3 and the connecting tube 1, and a second adhesive layer 5 is provided between the solidified layer 3 and the cable body 6. The first adhesive layer is any material that can be bonded to the polyurea material layer and the metal at the same time, and the second adhesive layer is any material that can be bonded to the polyurea material layer and the cable body 6 HDPE at the same time.

[0024] The first adhesive layer 2 does not extend to the outer surface of the wrapping layer 4, and the second adhesive layer 5 does not extend to the outer surface of the wrapping layer 4. Due to different viscosities, if the first adhesive layer 2 or the second adhesive layer 5 extends to the outer surface of the wrapping layer 4, the solidified layer 3 and the wrapping layer 4 will not be firmly bonded.

[0025] The outer wall of the connecting tube 1, the outer wall of the winding layer 4, and the outer wall of the cable body 6 form a continuous surface. The "continuous surface" means that there are no depressions, faults, or steps, so that when the solidified layer 3 is solidified thereon, a continuous surface can be formed, avoiding sudden changes in the thickness of the solidified layer 3 and sealing weaknesses. The reason is that if the thickness of the solidified layer 3 changes suddenly, the thickness of the solidified layer 3 at the edge of the sudden change will be thinned, and the sealing ability and wear resistance will be greatly reduced. However, absolute smoothness is not required here.

[0026] Preferably, the outer wall of the winding layer 4 in this embodiment is tapered, so that the connecting tube 1 can be smoothly transitioned to the cable body 6, and the tapered surface is easy to shape and easy to detect whether it is flat, thereby improving the production yield of the product.

[0027] In this embodiment, the solidified layer 3 is a polyurea material layer. The polyurea material layer is sprayed evenly on the outer surface of the connecting tube 1, the winding layer 4, and the cable body 6. The polyurea material is a polymer substance generated by the high temperature and high pressure reaction of an isocyanate component and an amino compound component. It not only combines the advantages of plastics, rubber, and fiberglass, but also has strong nonlinearity and strain rate correlation, so it has strong impact resistance, bulletproof and explosion-proof and excellent waterproof performance. In this embodiment, polyurea material is used as a solidified layer to wrap and seal between the cable body and the anchor head, which can protect the transition section between the cable body and the anchor head from damage during transportation and installation, and has good sealing performance after brushing the first adhesive layer 2 and the second adhesive layer 5, thereby ensuring the service life of the cable.

[0028] One implementation method of this embodiment includes the following steps: 1. Clean the surfaces of the connecting tube 1 and the cable body 6 with a cleaning agent; 2. After the surfaces of the connecting tube 1 and the cable body 6 are dried, wrap a sealing tape around the step formed by the connecting tube 1 and the cable body 6, and trim it to form a conical surface to form a wrapping layer 4; 3. Apply a first adhesive layer 2 on the surface of the connecting tube 1, and a second adhesive layer 5 on the surface of the cable body 6; 4. After the first adhesive layer 2 and the second adhesive layer 5 are fully reacted and dried, continuously and evenly spray a solidified layer 3 of polyurea material; 5. The solidified layer 3 of polyurea material is fully reacted and solidified to complete.

[0029] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A sealing structure for a rigid-flexible transition section of a cable, characterized in that: include: A connecting tube, a cable body, a winding layer, and a solidifying layer, wherein the cable body is connected to the connecting tube, the cross section of the connecting tube is larger than the cross section of the cable body, the connection between the connecting tube and the cable body forms a step, the winding layer is formed by a sealing tape wound around a depression of the step, the winding layer fills the depression of the step, and the solidifying layer covers the winding layer and covers the connecting tube and the cable body around the winding layer.

2. The sealing structure of the rigid-flexible transition section of a cable according to claim 1, characterized in that: A first adhesive layer is provided between the solidified layer and the connecting tube; or a second adhesive layer is provided between the solidified layer and the cable body.

3. The sealing structure of the rigid-flexible transition section of a cable according to claim 2, characterized in that: The first adhesive layer does not extend to the outer surface of the winding layer; or the second adhesive layer does not extend to the outer surface of the winding layer.

4. The sealing structure of the rigid-flexible transition section of a cable according to claim 1, characterized in that: The outer wall of the connecting tube, the outer wall of the winding layer, and the outer wall of the cable body form a continuous surface.

5. The sealing structure of the rigid-flexible transition section of a cable according to claim 4, characterized in that: The outer wall of the winding layer is formed into a cone shape.

6. A sealing structure for a rigid-flexible transition section of a cable according to any one of claims 1 to 5, characterized in that: The solidified layer is a polyurea material layer.

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