A method for installing and reeling a rotary cable, and a cable reel

Abstract

The present application relates to the technical field of suspension bridges, and more particularly to a method for erecting a rotary cable, a method for coiling the cable, and a cable coil. A method for erecting a rotary cable is characterized by comprising: step S2: simultaneously pulling the head and tail ends of the same cable from one end of the suspension bridge to the other end to release the cable; step S3: after the cable is released, anchoring the cable. On the one hand, the cable-laying efficiency of this technical solution is far higher than that of traditional technical means; on the other hand, it avoids the difficult operation of traditional technical means in which the cable must pass through a rotary saddle to complete the turning operation, greatly reducing the construction difficulty and having excellent operational convenience.

Description

Technical Field

[0001] The present application relates to the technical field of suspension bridges, and in particular to a method for installing and coiling a rotary cable, and a cable coil. Background Art

[0002] A revolving cable suspension bridge is a type of bridge with one main cable on each side. The main cable starts from an anchorage on one bank, goes around the anchorage on the opposite bank, and then returns to the anchorage on the starting bank. When the span is the same, the length of the revolving cable is about the length of a conventional double cable (such as the attached Figure 1 The main cable strands pass continuously through the slewing anchorage, where a slewing saddle system is used to achieve slewing anchorage. This replaces the traditional method of disconnected and dispersed anchorage of the main cable strands at the anchorage. This fully utilizes the constant load self-balancing characteristics of the main cable and optimizes the anchorage structure and anchorage structure. However, since the strands of a slewing cable suspension bridge are combined into a single strand upstream and downstream, the strands are long and require rotation, making their installation difficult.

[0003] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the Invention

[0004] The purpose of the present application is to provide a method for installing a rotary cable, a method for coiling a rotary cable, and a cable coil, so as to solve or alleviate the problems existing in the above-mentioned prior art.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A method for installing a rotary cable, comprising:

[0007] Step S2: Pulling the head and tail ends of the same cable from one end of the suspension bridge to the other end simultaneously to release the cable;

[0008] Step S3: After the cable is laid, anchoring of the cable is performed.

[0009] The above-mentioned method for installing a rotary cable preferably includes:

[0010] Step S1: Winding the cable onto a cable drum in a folded-in-half winding manner.

[0011] A method for coiling a rotary cable, comprising:

[0012] Step S1: Winding a single cable on a first cable drum using a conventional winding method with the cable strands' heads inside and their tails outside;

[0013] Step S2: When the cable is wound to the midpoint of the cable strand, a second cable drum is placed at the midpoint of the cable strand;

[0014] Step S3: rotating the cable at the midpoint of the cable strand to form a bent end;

[0015] Step S4: temporarily fixing the bent end to the second cable reel;

[0016] Step S5: The first cable drum releases the cable, and the second cable drum reels the cable, until the cable is completely folded in half and wound on the second cable drum.

[0017] A method for coiling a slewing cable as described above, preferably,

[0018] Step S3 specifically includes: after the first cable drum releases the cable and pulls the midpoint of the cable strand beyond a certain distance from the second cable drum, the cable is rotated at the midpoint of the strand to form a bent end, which is a strand ring;

[0019] Step S4 specifically includes: temporarily fixing the cable strand ring on the second cable drum.

[0020] In the above-mentioned method for coiling a rotary cable, preferably, the cable strands are coiled on the first cable drum in a manner of vertical winding and horizontal arrangement.

[0021] In the above-mentioned method for coiling a rotary cable, preferably, the cable strands are coiled on the first cable drum in a horizontally wound and vertically arranged manner.

[0022] A cable drum for a rotary cable comprises a first drum frame, a second drum frame, and a rotating base, wherein the first drum frame is arranged on the rotating base and rotates along with the rotation of the rotating base;

[0023] The axial direction of the first disk rack is parallel to the rotation axis direction of the rotating base;

[0024] The second disc frame is used to temporarily fix the cable strand ring after the cable is folded in half;

[0025] The first coil rack is used for coiling the cable strands that have been folded in half.

[0026] In the cable drum of the rotary cable as described above, preferably, the second drum frame is arranged on the rotating base and rotates together with the rotation of the rotating base;

[0027] The first and second disk racks are arranged at different positions on the rotating base. The axial directions of the first and second disk racks are parallel to the rotation axis direction of the rotating base. The axial length of the second disk rack is smaller than the axial length of the first disk rack.

[0028] In the cable drum of the rotary cable as described above, preferably, the second drum frame and the first drum frame are coaxially arranged.

[0029] In the cable drum of a rotary cable as described above, preferably, the second drum frame is provided with an anti-slip structure; and the rotating base is provided with a temporary fixing structure.

[0030] Compared with the closest prior art, the technical solution of the embodiment of the present application has the following beneficial effects:

[0031] 1. A creative technical solution was proposed to simultaneously pull the head and tail ends of the same cable from one end of the suspension bridge to the other. On the one hand, the cable-laying efficiency of this technical solution is much higher than that of traditional technical means; on the other hand, it avoids the difficult operation of turning the cable by rotating the saddle in traditional technical means, greatly reducing the construction difficulty and having excellent operational convenience.

[0032] 2. A cable folding and coiling method is provided, which can realize the simultaneous traction of the cable strand head and tail ends while saving the operating space of the cable coiling work, and has a high coiling efficiency.

[0033] 3. A cable drum structure is provided, which can realize efficient folding and winding of the cable strands while avoiding damage to the folded part of the cable strands and ensuring the shape stability of the bent end of the cable strands. Furthermore, by winding the cable on the cable drum in a folded and wound manner, it is possible to simultaneously pull the head and tail ends of the same cable strand to release the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings and descriptions that constitute part of this application are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. Among them:

[0035] Figure 1 This is a schematic diagram of the installation of a conventional double cable as shown in the background technology of this application;

[0036] Figure 2 This is a schematic diagram of the installation of simultaneously pulling the head and tail ends of the same cable strand according to an embodiment of the present application;

[0037] Figure 3 This is a schematic diagram of traditional cable winding;

[0038] Figure 4 This is a flow chart of cable coiling according to an embodiment of the present application;

[0039] Figure 5 This is a top view of a second cable drum after the cable is folded and coiled according to an embodiment of the present application;

[0040] Figure 6 This is a front view of a second cable drum after the cable is folded and coiled according to an embodiment of the present application;

[0041] Figure 7 This is a schematic diagram of a temporary fixing structure according to an embodiment of the present application.

[0042] Description of reference numerals:

[0043] 1. First cable drum; 2. Second cable drum; 3. First drum frame; 4. Second drum frame; 5. Cable; 6. Rotating base; 7. Anti-slip structure; 8. Temporary fixing structure; 9. Rotary anchor structure; 10. Pressure plate; 11. Screw; 12. Support disc; 13. Bending end. DETAILED DESCRIPTION

[0044] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is expected that the present application includes such modifications and variations within the scope of the appended claims and their equivalents.

[0045] In the following description, the terms "first / second / third" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that "first / second / third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the art of the present disclosure. The terms used herein are only for the purpose of describing the embodiments of the present disclosure and are not intended to limit the present disclosure.

[0047] In the description of this application, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and do not require that this application must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application. The terms "connected", "connected", and "set" used in this application should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0048] The following will be combined with the Figure 1 To the attached Figure 7 The installation method, coiling method and cable coil of a rotary cable 5 of the present application are further described in detail.

[0049] A method for installing a rotary cable 5, comprising:

[0050] Step S2: Pulling the head and tail ends of the same cable 5 from one end of the suspension bridge to the other end simultaneously;

[0051] Step S3: After the cable is laid, the cable 5 is anchored.

[0052] In the specific embodiment of the present application, the suspension bridge is specifically a single-tower rotary cable ground anchor suspension bridge built across a river. In order to reduce earthwork excavation and reduce damage to the environment, the bridge tower is set on the south bank, and only a rotary anchor structure 9 is set on the north bank. The rotary anchor structure 9 is specifically a surface-covered gravity anchor. The head and tail ends of the same cable 5 are pulled from the north bank to the south bank at the same time to release the cable, as shown in the attached figure. Figure 2 As shown, to ensure parallel deployment of the cable 5 at both ends and optimize the direction of force applied to the cable 5, multiple guide frames are provided. The cable 5 passes through each of the guide frames and is adjusted to a mutually parallel position. After deployment, the middle portion of the cable 5 is anchored in a rotary anchor structure 9. A rotary saddle is provided within the rotary anchor structure 9 to balance the force applied to the middle portion of the cable 5.

[0053] Since the steering installation of the traditional slewing cable requires that one end of the cable 5 be continuously passed through the slewing anchor to achieve rotation, but since the cable 5 of the slewing cable is longer than the traditional cable 5, the steering operation process is correspondingly more difficult and the steering installation time is longer. The method of simultaneously pulling the head and tail ends of the same cable 5 to release the cable can greatly shorten the cable release time and improve the cable release efficiency on the one hand, and avoid the operation of continuously passing one end of the cable 5 through the slewing anchor structure 9 to complete the steering, thereby reducing the construction difficulty.

[0054] The method further comprises: Step S1: winding the cable 5 on the cable drum in a folded winding manner.

[0055] In a specific embodiment of the present application, a cable drum is arranged along the axial direction of the suspension bridge, specifically on a rotary anchor structure 9. An anchor groove is provided in the rotary anchor structure 9, into which the cable 5 is anchored after being deployed to stabilize the rotational state. The anchor groove is specifically a semicircular groove with a certain radius, including two straight segments and a curved segment. The two straight segments extend in the same direction as the cable 5 is deployed, and the lateral spacing between the two straight segments is the same as the lateral spacing when the head and tail ends of the cable 5 are deployed in parallel. Multiple guide frames are specifically arranged along the circumference of the anchor groove.

[0056] As attached Figure 3The traditional winding method shown (with the head of the cable strand inside and the tail of the cable strand outside) cannot achieve the operation of pulling the head and tail ends of the cable strand 5 in the same direction at the same time. The present application creatively adopts a folded winding method to wind the cable 5 on the cable drum. On the one hand, it can achieve the operation of releasing the head and tail ends of the cable 5 at the same time. On the other hand, it is convenient for storing, transporting and releasing the cable 5, saving the operating space required when releasing the cable 5.

[0057] A method for coiling a rotary cable 5, comprising:

[0058] Step S1: Winding a single cable 5 on a first cable drum 1 in a conventional winding method with the cable strands headed inside and tailed outside;

[0059] Step S2: When the cable 5 is wound to the midpoint of the strand, a second cable drum 2 is placed at the midpoint of the strand;

[0060] Step S3: rotating the cable 5 at the midpoint of the cable strand to form a bent end 13;

[0061] Step S4: temporarily fixing the bent end 13 to the second cable drum 2;

[0062] Step S5: the first cable drum 1 releases the cable, and the second cable drum 2 reels the cable, until the cable 5 is completely folded in half and wound on the second cable drum 2.

[0063] In a specific embodiment of the present application, the folded coiling method specifically includes first winding the cable 5 on the first cable drum 1 by a conventional winding method, stopping when the cable 5 is about to be wound to the midpoint of the cable 5, placing the second cable drum 2 at the midpoint of the cable 5, keeping a certain distance between the first cable drum 1 and the second cable drum 2, bending the cable 5 at the midpoint to form a bent end 13, temporarily fixing the bent end 13 on the second cable drum 2, rotating the first cable drum 1 to release the cable, and rotating the second cable drum 2 in the opposite direction to collect the cable, until the cable 5 is completely folded and wound on the second cable drum 2, at this time, the bent end 13 of the cable 5 is on the inside, and the head and tail ends of the cable 5 are both on the outside.

[0064] The first cable drum 1 and the second cable drum 2 are used in cooperation to perform folding and winding. While the first cable drum 1 releases the cable, the second cable drum 2 takes up the cable, which greatly improves the winding speed of the cable 5. At the same time, the operation is simple and the operating space requirement is low, which avoids the cable 5 from being entangled with each other due to its excessive length when winding.

[0065] Step S3 specifically includes: after the first cable drum 1 releases the cable and pulls the cable 5 so that the midpoint of the cable strand exceeds the second cable drum 2 by a certain distance, the cable 5 is rotated at the midpoint of the cable strand to form a bent end 13, which is a cable strand ring;

[0066] Step S4 specifically includes: temporarily fixing the cable strand ring on the second cable drum 2 .

[0067] In a specific embodiment of the present invention, the midpoint of the strand (corresponding to the center point of the swivel saddle) is found according to the strand manufacturing mark, and a flexible traction device or clamp is used to connect the strand midpoint and traction is performed in a tangential direction away from the first cable drum 1 and the second cable drum 2. After the midpoint of the traction cable 5 strand extends beyond the edge of the second cable drum 2 by a distance of 20-30 times the diameter of the cable 5 strand, the cable 5 strand is rotated at the midpoint to form a bent end 13. The bent end 13 is a strand ring with a diameter of not less than 20 times the diameter of the strand to prevent damage to the folded portion of the cable 5 due to the rotation of the cable 5.

[0068] The strands of the cable 5 are wound on the first cable drum 1 in a vertically wound and horizontally arranged manner.

[0069] To ensure smooth winding of the cable 5 when the first cable reel 1 is unwinding and the second cable reel 2 is reeling in, in a specific embodiment of the present invention, the first cable reel 1 and the second cable reel 2 utilize the same coiling process, both of which utilize a traditional inside-out vertical winding and horizontal cable arrangement method. Specifically, the rotation axes of the coil frames of the first cable reel 1 and the second cable reel 2 are horizontal, and the cable strands 5 are attached to the coil frame used for initial coiling during production, transportation, and unwinding.

[0070] The strands of the cable 5 are wound on the first cable drum 1 in a horizontally wound and vertically arranged manner.

[0071] To ensure smooth winding of the cable 5 when the first cable reel 1 releases the cable and the second cable reel 2 takes up the cable, in another specific embodiment of the present invention, the first cable reel 1 and the second cable reel 2 adopt the same coiling process, both of which are horizontally wound from the inside to the outside and arranged vertically. Specifically, the rotation axes of the reels of the first cable reel 1 and the second cable reel 2 are vertical, and the cable 5 can be detached from the reel after being coiled to facilitate subsequent transportation.

[0072] A cable drum for a rotary cable 5, comprising a first drum frame 3, a second drum frame 4, and a rotating base 6, wherein the first drum frame 3 is arranged on the rotating base 6 and rotates along with the rotation of the rotating base 6;

[0073] The axial direction of the first disk rack 3 is parallel to the rotation axis direction of the rotating base 6;

[0074] The second disc frame 4 is used to temporarily fix the cable 5 into a circular ring after it is folded in half;

[0075] The first coil frame 3 is used for coiling the cable 5 strands that have been folded in half.

[0076] In a specific embodiment of the present invention, the second cable drum 2 includes a first drum frame 3, a second drum frame 4, and a rotating base 6. The distance between the second drum frame 4 and the second drum frame 4 is 20-30 times the diameter of the cable 5 strand. The rotating base 6 is placed horizontally and the rotation axis is in the vertical direction. The first drum frame 3 and the second drum frame 4 are both conical cylindrical structures with a small top and a large bottom. The first drum frame 3 is arranged on the rotating base 6 and rotates around the vertical rotation axis together with the rotating base 6. The folded cable strand ring is sleeved on the outer periphery of the second drum frame 4. The conical cylindrical structure of the second drum frame 4 forms a rigid support for the inside of the cable strand ring, ensuring that the shape of the folded cable strand ring of the cable 5 is stable and preventing damage to the folded part of the cable 5 strand.

[0077] In other embodiments of the present invention, the rotating base 6 is placed vertically, the rotation axis is horizontal, and the first disc rack 3 and the second disc rack 4 are horizontally placed cylindrical structures.

[0078] In other embodiments of the present invention, the second disc frame 4 can be processed into a semi-hexagonal or semi-ring shape that is approximately consistent with the shape of the contact portion of the cable strand ring.

[0079] In actual use, before the cable 5 strands are wound on the second cable drum 2, the first cable drum 1 and the second cable drum 2 are located on the same side of the cable 5 strands and the second cable drum 2 is located as a whole at the midpoint of the cable 5. A flexible traction device or a clamp is used to connect the midpoint of the cable strands and pull them in a tangential direction away from the first cable drum 1 and the second cable drum 2. The midpoint of the cable 5 strands is pulled beyond the edge of the first drum frame 3 by 20-30 times the diameter of the cable 5 strands. After reaching the edge of the second drum frame 4, it rotates to form a bent end 13. At this time, the bent end 13 is sleeved on the outer periphery of the second drum frame 4. The two cable 5 strands formed after the rotation and folding are located on the same side of the first drum frame 3 before being wound on the first drum frame 3.

[0080] The second disc rack 4 is arranged on the rotating base 6 and rotates along with the rotation of the rotating base 6;

[0081] The first disk rack 3 and the second disk rack 4 are arranged at different positions on the rotating base 6. The axial directions of the first disk rack 3 and the second disk rack 4 are parallel to the rotation axis direction of the rotating base 6. The axial length of the second disk rack 4 is smaller than the axial length of the first disk rack 3.

[0082] In a specific embodiment of the present invention, the first disc rack 3 and the second disc rack 4 have a conical cylindrical structure with the same cross-sectional dimensions, and a supporting disc 12 is coaxially arranged on the rotating base 6. The first disc rack 3 and the second disc rack 4 are arranged side by side on the supporting disc 12. The inner diameter of the maximum end cross-section of the two is 25 times the diameter of the rope strand, and the wall thickness is 0.2m. The axial length of the second disc rack 4 is smaller than the axial length of the first disc rack 3, so as to avoid affecting the winding operation of the first disc rack 3 on the basis of meeting the temporary arrangement of the bent end 13.

[0083] After the cable 5 strands are folded back and the bent ends 13 are sheathed on the second coil rack 4, the coiling operation of the first coil rack 3 is carried out. Figure 6 In the manner of horizontal winding from inside to outside and vertical arrangement of the cables, the bent ends 13 of the cables 5 after being coiled are wound on the innermost side, and the head and tail ends of the cables 5 are both located on the outermost side.

[0084] The second disc rack 4 and the first disc rack 3 are coaxially arranged.

[0085] In a specific embodiment of the present invention, the first disc rack 3 and the second disc rack 4 are coaxially arranged with the rotating base 6 and the second disc rack 4 is located above the first disc rack 3. The axial length of the second disc rack 4 is smaller than the axial length of the first disc rack 3, which meets the requirement of the bending end 13 being sleeved.

[0086] After the bent end 13 of the cable 5 is folded in half and sleeved on the second drum rack 4, the first drum rack 3 is downwardly wound to form a drum.

[0087] In other embodiments of the present invention, the first disc rack 3 and the second disc rack 4 are coaxially arranged and located on one side of the rotating base 6 .

[0088] The second disc rack 4 is provided with an anti-slip structure 7 ; the rotating base 6 is provided with a temporary fixing structure 8 .

[0089] In a specific embodiment of the present invention, the second disc rack 4 is evenly provided with anti-slip structures 7 in the circumference, specifically a limiting rod, which is used to prevent the bent end 13 of the cable 5 from falling off the second disc rack 4; a temporary fixing device is provided on the rotating base 6, specifically a limiting clamp composed of a screw 11 and a pressure plate 10. The cable 5 strand passes through the limiting clamp and is folded in half after exiting the second disc rack 4, and then passes through another limiting clamp to further firmly fix the bent end 13 on the second disc rack 4, and make the folded cable 5 strand rotate to the same side of the first disc rack 3.

[0090] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are readily apparent to those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for coiling a rotary cable, characterized in that: include: Step S1: Winding a single cable on a first cable drum using a conventional winding method with the cable strands' heads inside and their tails outside; Step S2: When the cable is wound to the midpoint of the cable strand, a second cable drum is placed at the midpoint of the cable strand; Step S3: rotating the cable at the midpoint of the cable strand to form a bent end; Step S4: temporarily fixing the bent end to the second cable reel; Step S5: The first cable drum releases the cable, and the second cable drum reels the cable, until the cable is completely folded in half and wound on the second cable drum; The method for installing the cable folded and wound on the second cable drum in step S5 includes: The head and tail ends of the same cable are simultaneously pulled from one end of the suspension bridge to the other end to release the cable. After the cable is released, the cable is anchored.

2. A method for coiling a rotary cable according to claim 1, characterized in that: Step S3 specifically includes: after the first cable drum releases the cable and pulls the midpoint of the cable strand beyond a certain distance from the second cable drum, the cable is rotated at the midpoint of the strand to form a bent end, which is a strand ring; Step S4 specifically includes: temporarily fixing the cable strand ring on the second cable drum.

3. The method for coiling a rotary cable according to claim 1, wherein: The cable strands are wound on the first cable drum in a vertically wound and horizontally arranged manner.

4. A method for coiling a rotary cable according to claim 1, characterized in that: The cable strands are wound on the first cable drum in a horizontally wound and vertically arranged manner.

5. A cable drum for a rotary cable, characterized in that: The invention comprises a first disk rack, a second disk rack and a rotating base, wherein the first disk rack is arranged on the rotating base and rotates along with the rotation of the rotating base; The axial direction of the first disk rack is parallel to the rotation axis direction of the rotating base; The second disc frame is used to temporarily fix the cable strand ring after the cable is folded in half; The first coil rack is used for coiling the cable strands that have been folded in half.

6. A cable drum for a rotary cable according to claim 5, characterized in that: The second disk rack is arranged on the rotating base and rotates along with the rotation of the rotating base; The first and second disk racks are arranged at different positions on the rotating base. The axial directions of the first and second disk racks are parallel to the rotation axis direction of the rotating base. The axial length of the second disk rack is smaller than the axial length of the first disk rack.

7. A cable drum for a rotary cable according to claim 5, characterized in that: The second disk rack and the first disk rack are coaxially arranged.

8. A cable drum for a rotary cable according to any one of claims 5 to 7, characterized in that: The second disc rack is provided with an anti-slip structure; the rotating base is provided with a temporary fixing structure.

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