Bridge cable repair device and bridge cable repair method

Abstract

A bridge cable repair device includes a cable repair clamp, a connection unit, a heating unit, a plurality of limit rods and a power supply plug; the cable repair clamp includes two arc-shaped clamps, and the edges of both sides of the arc-shaped clamps are provided with a first connection portion extending outward, and the connection unit connects the first connection portions of the two arc-shaped clamps; a plurality of limit protrusion groups are protrudingly provided on the outer side of the arc-shaped clamps, each limit protrusion group includes at least two limit protrusions, and a second through hole is provided on the limit protrusion, and each limit rod passes through the second through holes of the two limit protrusions of each limit protrusion group; the heating unit includes two arc-shaped heating plates, and a power supply connection seat is protrudingly provided on the outer side wall of the arc-shaped heating plate away from the avoidance groove, and the power supply plug is plugged into the power supply connection seat. In this way, the outer high-density polyethylene layer can be repaired better and kept in a better protective state and aesthetics. The present invention also provides a bridge cable repair method.

Description

Technical Field

[0001] The invention relates to the technical field of bridge maintenance, in particular to a bridge cable repairing device and a bridge cable repairing method. Background Art

[0002] The bridge cable is the most important load-bearing component of the cable-supported bridge, including the suspension arch bridge, the cable-stayed bridge and the suspension bridge. Its durability and reliability are directly related to the safe operation and service life of the bridge. There is an existing bridge cable, which includes steel strands, epoxy resin layers, inner high-density polyethylene layers (HDPE) and outer high-density polyethylene layers (HDPE) from the inside to the outside. The inner high-density polyethylene layer and the outer high-density polyethylene layer are set successively during production, so the two have obvious physical stratification. The outer high-density polyethylene layer is easily damaged during the electric welding construction of other accessories. For example, if the electric welding operation is wrong and causes a fire, the outer high-density polyethylene layer is partially melted. If the fire is properly put out, generally only the outer high-density polyethylene layer is partially damaged, while the inner high-density polyethylene layer (HDPE), epoxy resin layer and steel strand are not damaged. In view of this situation, the applicant has proposed a technical solution for repairing the outer high-density polyethylene layer of the bridge cable. It can maintain a good protection state and aesthetics. Summary of the invention

[0003] In view of this, the present invention provides a bridge cable repair device and a bridge cable repair method which can better repair the outer high-density polyethylene layer to maintain a good protective state and aesthetics, so as to solve the above problems.

[0004] A bridge cable repair device comprises a cable repair clamp, a connecting unit, a heating unit, a plurality of limit rods and a power supply plug; the cable repair clamp comprises two relatively arranged arc-shaped clamping plates, the sides of the two arc-shaped clamping plates facing each other are recessed to form an arc-shaped or semicircular accommodating groove, the edges of both sides of the arc-shaped clamping plates are provided with a first connecting portion extending outward, and the connecting unit connects the first connecting portions of the two arc-shaped clamping plates; a plurality of limit protrusion groups are protrudingly provided on the outer side surface of the arc-shaped clamping plates, each limit protrusion group comprises at least two limit protrusions, a second through hole is provided on the limit protrusion, and each limit rod passes through the second through holes of the two limit protrusions of each limit protrusion group; the heating unit comprises two relatively arranged arc-shaped heating plates, the sides of the two arc-shaped heating plates facing each other are recessed to form an arc-shaped or semicircular avoidance groove, a power supply connection socket is protrudingly provided on the outer side wall of the arc-shaped heating plate away from the avoidance groove, and the power supply plug is plugged into the power supply connection socket.

[0005] Furthermore, the connecting line between the two limiting protrusions is parallel to the length direction of the arc-shaped clamping plate.

[0006] Furthermore, second connecting parts are extended outwardly at both side edges of the arc-shaped heating plate, and third through holes are opened on the second connecting parts. A screw passes through two third through holes corresponding to the two arc-shaped heating plates and is threadedly connected with a nut.

[0007] Furthermore, the first connecting part is a plurality of protruding ears, each of which is provided with a first through hole, and the connecting unit includes a bolt passing through the first through hole of the ears corresponding to the two arc-shaped clamping plates, a spring washer sleeved on the bolt, and a nut threadedly connected to the bolt.

[0008] A method for repairing a bridge cable comprises the following steps: step S1: peeling off a damaged section of the outer high-density polyethylene layer on the outside of the bridge cable; step S2: filling high-density polyethylene shavings or high-density polyethylene strips in the concave ring formed by peeling off the outer high-density polyethylene layer; step S3: using a welding gun to perform hot-melt welding on the high-density polyethylene shavings or high-density polyethylene strips at both ends along the length and at the joints with the original outer high-density polyethylene layer; step S4: wrapping high-temperature fiber cloth on the outside of the high-density polyethylene shavings or high-density polyethylene strips; step S5: clamping the high-temperature fiber cloth from the outside with a cable repair clamp, the cable repair clamp comprising two arc-shaped clamping plates arranged opposite to each other, both side edges of the arc-shaped clamping plates are provided with a first connecting portion extending outward, and a plurality of limiting protrusion groups are protrudingly provided on the outer side surface of the arc-shaped clamping plates, each limiting protrusion group comprises at least two limiting protrusions, and a second through hole is provided on the limiting protrusion; step S6: connecting The connecting unit connects the first connecting parts of the two arc-shaped clamps; step S7: a heating unit is put on the outside of the arc-shaped clamp of the cable repair clamp, and the heating unit includes two arc-shaped heating plates arranged opposite to each other, and a power connection seat is protrudingly provided on the outer wall of the arc-shaped heating plate; step S8: a limiting rod is passed through the second through holes of the two limiting protrusions of each limiting protrusion group, and the limiting rod is partially located on the outside of the heating unit; step S9: the power supply plug is plugged into the power connection seat, and the heating unit heats and melts the high-density polyethylene shavings or high-density polyethylene strips through the cable repair clamp and the high-temperature fiber cloth; step S10: when high-density polyethylene overflows from the gap of the high-temperature fiber cloth, the heating is stopped, the power supply plug is pulled out, the limiting rod and the heating unit are removed, and the high-density polyethylene in the cable repair clamp is cooled naturally; step S11: the cable repair clamp is removed; step S12: the surface of the new outer high-density polyethylene layer is polished with a cotton wool polishing sheet.

[0009] Furthermore, in the above step S10, the natural cooling time of the high-density polyethylene in the cable repair clamp is 30 minutes to 60 minutes.

[0010] Furthermore, in the above step S10, after removing the limiting rod and the heating unit, a high temperature resistant heat-insulating cotton is wrapped around the cable repair clamp.

[0011] Furthermore, the above step S12 further includes: step S13: winding the spiral wire around the outside of the new outer high-density polyethylene layer, and welding the spiral wire to the new outer high-density polyethylene layer with a high-power hot air welding gun.

[0012] Compared with the prior art, the bridge cable repair device of the present invention includes a cable repair clamp, a connection unit, a heating unit, a plurality of limit rods and a power supply plug; the cable repair clamp includes two arc-shaped clamps arranged oppositely, the two arc-shaped clamps have one side concavely formed into an arc-shaped or semicircular receiving groove, the two side edges of the arc-shaped clamps are provided with a first connection part extending outward, and the connection unit connects the first connection parts of the two arc-shaped clamps; a plurality of limit protrusion groups are protrudingly arranged on the outer side of the arc-shaped clamp, each limit protrusion group includes at least two limit protrusions, a second through hole is provided on the limit protrusion, and each limit rod passes through the second through holes of the two limit protrusions of each limit protrusion group; the heating unit includes two arc-shaped heating plates arranged oppositely, the two arc-shaped heating plates have one side concavely formed into an arc-shaped or semicircular avoidance groove, a power supply connection seat is protrudingly provided on the outer side wall of the arc-shaped heating plate away from the avoidance groove, and the power supply plug is plugged into the power supply connection seat. In this way, the outer high-density polyethylene layer can be repaired well, so that it can maintain a good protection state and aesthetics. The invention also provides a bridge cable repair method. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The embodiments of the present invention are described below in conjunction with the accompanying drawings, wherein:

[0014] Figure 1 This is a three-dimensional schematic diagram of the bridge cable repair device provided by the present invention.

[0015] Figure 2 for Figure 1 Schematic diagram of the end face of the cable repair clamp.

[0016] Figure 3 for Figure 1 Schematic side view of the cable repair clamp.

[0017] Figure 4 for Figure 1 Schematic diagram of the structure of the heating unit. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are further described in detail below based on the accompanying drawings. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0019] Please refer to Figure 1The bridge cable includes a steel strand 11, an epoxy resin layer 12, an inner high-density polyethylene layer (HDPE) 13 and an outer high-density polyethylene layer (HDPE) (not shown) from the inside to the outside. The inner high-density polyethylene layer 13 and the outer high-density polyethylene layer are set in sequence during production, so the two have obvious physical stratification.

[0020] In other embodiments, an insulating isolation layer may be provided between the inner high-density polyethylene layer 13 and the outer high-density polyethylene layer 14 .

[0021] The bridge cable repair device provided by the present invention is used to repair the damaged outer high-density polyethylene layer of the bridge cable. The bridge cable repair device provided by the present invention includes a cable repair clamp 30, a connecting unit 40, a heating unit 50, a plurality of limit rods 60 and a power plug 70.

[0022] Please continue to refer to Figure 2 and Figure 3 The cable repair clamp 30 includes two arc-shaped clamps 31 arranged opposite to each other, and the sides of the two arc-shaped clamps 31 facing each other are recessed to form an arc-shaped or semicircular accommodating groove. The edges of both sides of the arc-shaped clamps 31 are provided with first connecting parts 32 extending outward, and the connecting unit 40 passes through the first connecting parts 32 of the two arc-shaped clamps 31 to make the two arc-shaped clamps 31 relatively fixed.

[0023] The first connecting portion 32 is a plurality of protruding ears, each of which is provided with a first through hole. The connecting unit 40 includes a bolt 41 passing through the first through hole of the ears corresponding to the two arc-shaped clamping plates 31, a spring washer 43 sleeved on the bolt 41 and a nut 42 threadedly connected to the bolt 41.

[0024] A plurality of limiting protrusion groups are also protrudingly provided on the outer surface of the arc-shaped clamping plate 31, each limiting protrusion group includes at least two limiting protrusions 33, the connection line between the two limiting protrusions 33 is parallel to the length direction of the arc-shaped clamping plate 31, and a second through hole is opened on the limiting protrusion 33. Each limiting rod 60 passes through the second through holes of the two limiting protrusions 33 of each limiting protrusion group.

[0025] Please refer to Figure 4 The heating unit 50 includes two arc-shaped heating plates 51 arranged opposite to each other, and the two sides of the two arc-shaped heating plates 51 facing each other are recessed to form an arc-shaped or semicircular avoidance groove. The edges of both sides of the arc-shaped heating plates 51 are provided with second connecting parts 52 extending outward, and the second connecting part 52 is provided with a third through hole. A screw passes through the two third through holes corresponding to the two arc-shaped heating plates 51 and is threadedly connected with a nut.

[0026] A power connection socket 53 is protrudingly provided on the outer side wall of the arc-shaped heating plate 51 away from the avoidance groove, and a power supply plug 70 is plugged into the power supply connection socket 53 , and the power supply plug 70 is connected to an external power source through a cable.

[0027] When the damaged outer high-density polyethylene layer of the bridge cable is repaired by using the bridge cable repair device provided by the present invention, first peel off a section of the damaged outer high-density polyethylene layer on the outside of the bridge cable, fill the concave ring formed by peeling off the outer high-density polyethylene layer with high-density polyethylene shavings or high-density polyethylene strips, and use a welding gun to perform hot-melt welding on the joints at both ends; wrap high-temperature fiber cloth 20 around the outside of the high-density polyethylene shavings or high-density polyethylene strips; the cable repair clamp 30 clamps the high-temperature fiber cloth 20 from the outside, that is, first wrap the high-temperature fiber cloth 20 from both sides of the two arc-shaped clamps 31 respectively, then pass the bolt 41 through the first through hole of the ears corresponding to the two arc-shaped clamps 31, put on the spring gasket 43, and then thread the nut 42 with the bolt 41. Then, a heating unit 50 is put on the outside of the arc clamp 31, that is, the two arc heating plates 51 wrap the arc clamp 31 from both sides respectively; the limiting rod 60 passes through the two limiting protrusions 33 of each limiting protrusion group, so as to limit the two arc heating plates 51, and the second connecting parts 52 of the two arc heating plates 51 can be installed with screws and nuts, or without screws and nuts; the power supply plug 70 is plugged into the power connection socket 53, so that the heating unit 50 heats and melts the high-density polyethylene shavings or high-density polyethylene strips through the repair cable clamp 30 and the high-temperature fiber cloth 20; during heating and melting, the bolts 41 and the nuts 42 can be appropriately tightened so that the repair cable clamp 30 keeps clamping the high-density polyethylene shavings or high-density polyethylene strips.

[0028] When high-density polyethylene overflows from the gap of the high-temperature fiber cloth 20 at the side of the cable repair clamp 30, stop heating, unplug the power plug 70, remove the limit rod 60 and the heating unit 50, keep the cable repair clamp 30 in this state, and allow the high-density polyethylene inside to cool naturally for 30 minutes to 60 minutes. The high-density polyethylene shavings or high-density polyethylene strips are melted and cooled to form a new outer high-density polyethylene layer.

[0029] If the ambient temperature is too low, high temperature resistant heat insulation cotton can be used to insulate the cable repair clamp 30 and the high density polyethylene inside to slow down the cooling speed of the high density polyethylene. If the high density polyethylene cools too fast or the cable repair clamp 30 is removed too early, the molten high density polyethylene will shrink and form a necking state, making the surface uneven.

[0030] Afterwards, the cable repair clamp 30 is removed, and the surface of the new outer high-density polyethylene layer is ground and polished with a cotton wool polishing sheet to make the surface of the new outer high-density polyethylene layer round and smooth.

[0031] Finally, the high-density polyethylene material spiral wire is wound around the correct position outside the new outer high-density polyethylene layer, and a line is drawn with a marker, and then the spiral wire is bonded to the new outer high-density polyethylene layer along the marked line with a high-power hot air welding gun, and the hot air temperature of the high-power hot air welding gun is about 520°C. The spiral wire is used to solve the problem of wind and rain excitation of the cable.

[0032] If the bridge cable is originally provided with an insulating isolation layer and the insulating isolation layer is also damaged, the damaged insulating isolation layer shall be peeled off and the insulating isolation layer shall be wrapped before filling with high-density polyethylene shavings or high-density polyethylene strips.

[0033] The present invention also provides a bridge cable repair method, comprising the following steps:

[0034] Step S1: peeling off a damaged outer high-density polyethylene layer of a bridge cable;

[0035] Step S2: filling high-density polyethylene shavings or high-density polyethylene strips in the concave ring formed by peeling off the outer high-density polyethylene layer;

[0036] Step S3: using a welding gun to perform hot-melt welding on the seams between the two ends of the high-density polyethylene wood chips or high-density polyethylene strips along the length and the original outer high-density polyethylene layer;

[0037] Step S4: Wrapping a high-temperature fiber cloth 20 around the outside of the high-density polyethylene shavings or high-density polyethylene strips, the high-temperature fiber cloth 20 plays a role in uniform heat conduction and isolating the cable repair clamp 30 from the high-density polyethylene;

[0038] Step S5: Clamp the high temperature fiber cloth 20 from the outside with the cable repair clamp 30;

[0039] Step S6: The connecting unit 40 connects the first connecting portions 32 of the two arc-shaped clamping plates 31;

[0040] Step S7: Covering the heating unit 50 on the outside of the arc-shaped clamping plate 31 of the cable repair clamping mold 30;

[0041] Step S8: Pass the limiting rod 60 through the second through holes of the two limiting protrusions 33 of each limiting protrusion group, so as to limit the two arc-shaped heating plates 51;

[0042] Step S9: plug the power plug 70 into the power connection socket 53, and the heating unit 50 heats and melts the high-density polyethylene shavings or high-density polyethylene strips through the cable repair clamp 30 and the high-temperature fiber cloth 20;

[0043] Step S10: When high-density polyethylene overflows from the gap of the high-temperature fiber cloth 20, the heating is stopped, the power plug 70 is unplugged, the limit rod 60 and the heating unit 50 are removed, and the high-density polyethylene inside the cable repair clamp 30 is naturally cooled to form a new outer high-density polyethylene layer;

[0044] Step S11: removing the cable repair clamp 30;

[0045] Step S12: grinding and polishing the surface of the new outer high-density polyethylene layer with a cotton wool polishing sheet;

[0046] Step S13: Wrap the spiral wire around the outside of the new outer high-density polyethylene layer, and weld the spiral wire to the new outer high-density polyethylene layer using a high-power hot air welding gun.

[0047] Compared with the prior art, the bridge cable repair device of the present invention comprises a cable repair clamp 30, a connecting unit 40, a heating unit 50, a plurality of limit rods 60 and a power plug 70; the cable repair clamp 30 comprises two arc-shaped clamping plates 31 arranged opposite to each other, the two arc-shaped clamping plates 31 have one side recessed to form an arc-shaped or semicircular receiving groove, the two side edges of the arc-shaped clamping plates 31 are provided with a first connecting portion 32 extending outward, the connecting unit 40 connects the first connecting portions 32 of the two arc-shaped clamping plates 31; the outer surface of the arc-shaped clamping plates 31 is provided with a protruding There are several limit block groups, each of which includes at least two limit blocks 33, and the limit blocks 33 are provided with a second through hole, and each limit rod 60 passes through the second through holes of the two limit blocks 33 of each limit block group; the heating unit 50 includes two arc-shaped heating plates 51 arranged opposite to each other, and the two arc-shaped heating plates 51 are recessed on the opposite sides to form an arc-shaped or semicircular avoidance groove, and the outer wall of the arc-shaped heating plate 51 away from the avoidance groove is protrudingly provided with a power connection seat 53, and the power supply plug 70 is plugged into the power connection seat 53. In this way, the outer high-density polyethylene layer can be repaired better and kept in a better protective state and aesthetics. The present invention also provides a bridge cable repair method.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A bridge cable repair method, which uses a bridge cable repair device for repair, the bridge cable repair device comprises a cable repair clamp, a connecting unit, a heating unit, a plurality of limit rods and a power supply plug; the cable repair clamp comprises two arc-shaped clamps arranged opposite to each other, the two arc-shaped clamps have one side recessed to form an arc-shaped or semicircular receiving groove, the two side edges of the arc-shaped clamps are provided with a first connecting portion extending outward, and the connecting unit connects the first connecting portions of the two arc-shaped clamps; a plurality of limit protrusion groups are protrudingly provided on the outer side of the arc-shaped clamp, each limit protrusion group comprises at least two limit protrusions, a second through hole is provided on the limit protrusion, and each limit rod passes through the second through holes of the two limit protrusions of each limit protrusion group; the heating unit comprises two arc-shaped heating plates arranged opposite to each other, the two arc-shaped heating plates have one side recessed to form an arc-shaped or semicircular avoidance groove, a power supply connection seat is protrudingly provided on the outer side wall of the arc-shaped heating plate away from the avoidance groove, and the power supply plug is plugged into the power supply connection seat, and the bridge cable repair method comprises the following steps: Step S1: peeling off a damaged outer high-density polyethylene layer of a bridge cable; Step S2: filling high-density polyethylene shavings or high-density polyethylene strips in the concave ring formed by peeling off the outer high-density polyethylene layer; Step S3: using a welding gun to perform hot-melt welding on the seams between the two ends of the high-density polyethylene wood chips or high-density polyethylene strips and the original outer high-density polyethylene layer; Step S4: wrapping high temperature fiber cloth around the outside of high density polyethylene shavings or high density polyethylene strips; Step S5: clamping the high-temperature fiber cloth from the outside with the cable repair clamp; Step S6: The connecting unit connects the first connecting parts of the two arc-shaped splints; Step S7: putting a heating unit on the outside of the arc-shaped clamping plate of the cable repair clamping mold; Step S8: passing the limiting rod through the second through holes of the two limiting protrusions of each limiting protrusion group, and the limiting rod is partially located outside the heating unit; Step S9: plugging the power supply plug into the power connection socket, and the heating unit heats and melts the high-density polyethylene shavings or high-density polyethylene strips through the cable repair clamp and the high-temperature fiber cloth; Step S10: When high-density polyethylene overflows from the gap of the high-temperature fiber cloth, stop heating, unplug the power plug, remove the limit rod and the heating unit, and allow the high-density polyethylene in the cable repair clamp to cool naturally. The high-density polyethylene in the cable repair clamp cools naturally for 30 minutes to 60 minutes. After removing the limit rod and the heating unit, wrap the cable repair clamp with a high-temperature resistant insulation cotton; Step S11: removing the cable repair clamping die; Step S12: Use a cotton wool polishing sheet to grind and polish the surface of the new outer high-density polyethylene layer.

2. The bridge cable repair method according to claim 1, characterized in that: The above step S12 also includes: step S13: winding the spiral wire around the outside of the new outer high-density polyethylene layer, and welding the spiral wire to the new outer high-density polyethylene layer with a high-power hot air welding gun.

3. The bridge cable repair method according to claim 1, characterized in that: The connecting line between the two limiting protrusions is parallel to the length direction of the arc-shaped clamping plate.

4. The bridge cable repair method according to claim 1, characterized in that: The edges of both sides of the arc-shaped heating plate are extended outwards to form a second connection part, and a third through hole is opened on the second connection part. A screw passes through the two third through holes corresponding to the two arc-shaped heating plates and is threadedly connected with a nut.

5. The bridge cable repair method according to claim 1, characterized in that: The first connecting part is a plurality of protruding ears, each of which is provided with a first through hole. The connecting unit includes a bolt passing through the first through holes of the ears corresponding to the two arc-shaped clamping plates, a spring washer sleeved on the bolt, and a nut threadedly connected to the bolt.

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