High-precision cable saddle and method for manufacturing bidirectional curved space cable saddle for inclined cable

Abstract

The present invention discloses a high-precision cable saddle and a manufacturing method of a bidirectional curved space cable saddle for a cable-stayed cable. The high-precision cable saddle includes a wire-dividing tube assembly, and a positioning cylindrical head is arranged at the end of the wire-dividing tube assembly. The positioning cylindrical head is inserted and fixed into a positioning cylinder, and an adjustment unit is formed between the positioning cylinder and the positioning cylindrical head. The positioning cylinder is fixed to the end face of the elevation anchor pad. The manufacturing method includes the following steps: processing a wire-dividing tube assembly for spatial bending; welding a positioning cylindrical head; adjusting and determining the installation parameters of the elevation anchor pad; installing the positioning cylindrical head; adjusting and installing the positioning cylindrical head; and fixing to complete the cable saddle manufacturing. The present invention can simultaneously meet the use requirements of plane and space cable saddles, and the manufacturing accuracy of the space cable saddle is greatly improved, the processing accuracy and dimensional error are small, and the difficulty of its processing technology is low, which can meet the use of engineering applications.

Description

Technical Field

[0001] The invention belongs to the technical field of bridges, and in particular relates to a method for manufacturing a high-precision cable saddle and a bidirectional curved spatial cable saddle for a cable-stayed cable. Background Art

[0002] At present, the main form of suspension bridges is the plane cable system. The calculation theory of parallel cable plane suspension bridges is mature, and the construction technology is very complete. Therefore, most of the suspension bridges that have been built are plane cable systems. However, with the increase in the span of suspension bridges, the width-to-span ratio of extra-large span suspension bridges is relatively small, which is not conducive to the wind resistance of the bridge. The structure of extra-large span suspension bridges is more delicate, the natural frequency of the structure is reduced, and it is more prone to dynamic instability. These are the controlling factors for the development of suspension bridges to larger spans.

[0003] The spatial cable suspension bridge is developed on the basis of the plane cable system suspension bridge. Its main cable line is a three-dimensional spatial system. The force is more complex than that of the plane system, but it has better ornamental value and better aerodynamic performance than the plane cable system.

[0004] Compared with the plane cable system suspension bridge of the same size, the space cable system suspension bridge has great advantages in improving the dynamic performance of the bridge. Since the main cable and the hanger form a three-dimensional system, the space cable greatly increases the lateral stiffness of the suspension bridge without increasing the internal force of the hanger much.

[0005] Under the action of vertical eccentric load, the torsional stiffness of the suspension bridge with a spatial cable system is significantly improved compared with that of the plane cable system. Under the action of static wind load (crosswind action, vertical action, torsion), the lateral displacement is significantly reduced and the lateral stiffness is greatly improved. In terms of dynamic characteristics, for the same vibration mode of two bridge forms of the same scale, whether lateral or torsion, the order of the spatial cable system appears later than that of the plane cable system, and the frequency of the vibration mode of the same order is higher than that of the plane cable system. It can be seen that the suspension bridge with a spatial cable system has better dynamic stability characteristics.

[0006] like Figures 1-2 As shown, the two-dimensional saddle technology closest to the present invention is a round tube type wire tube assembly 1, which is formed by welding a number of seamless small steel tubes and bending them according to a radius R, and the two ends are directly welded to the elevation positioning plate 2 and the reinforcing rib plate 7 to form a whole.

[0007] The disadvantage is that the bending and forming in the existing technology is carried out in the same parallel plane, and it is impossible to perform accurate three-dimensional bending. This is mainly because the round tube type wire tube is formed by cold bending and welding of seamless steel tubes. Welding generates high temperature, and steel has the characteristics of thermal expansion and contraction. It will produce large deformation during the cooling process, resulting in large dimensional errors. The processing technology is difficult and cannot be produced with high precision. The current processing level can only be processed in a two-dimensional plane.

[0008] Therefore, due to the limitations of conventional wire-splitting tube saddle processing technology, it is impossible to produce spatial saddles, and even after bending, the accuracy cannot meet the requirements of engineering applications. Summary of the invention

[0009] The present invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a high-precision saddle and a method for manufacturing a bidirectional curved spatial saddle for a stay cable.

[0010] The technical solution of the present invention is: a high-precision saddle, including a wire dividing tube assembly, a positioning cylindrical head is provided at the end of the wire dividing tube assembly, the positioning cylindrical head is inserted and fixed in the positioning tube, an adjustment unit is formed between the positioning tube and the positioning cylindrical head, and the positioning tube is fixed to the end face of the elevation anchor plate.

[0011] Furthermore, a connecting rod is provided between the elevation anchor plate and the end of the wire distribution tube assembly, and the connecting rod includes a connecting end and a disassembly end of an integral structure.

[0012] Furthermore, the wire-dividing tube assembly forms a wire-dividing tube cavity, and the connecting end is inserted into and blocks the wire-dividing tube cavity.

[0013] Furthermore, a through hole is formed in the elevation anchor plate, and the connecting end passes through the through hole.

[0014] Furthermore, the adjustment unit includes a slide groove formed on the wall of the positioning cylinder, and a convex rib is formed on the outer wall of the positioning cylindrical head, and the convex rib is inserted into the slide groove.

[0015] The slide grooves are arranged symmetrically in pairs, and the convex ribs drive the positioning cylindrical head to slide and adjust in the positioning cylinder.

[0016] Furthermore, after the adjustment of the adjustment unit is completed, the convex rib and the slide groove are spot welded and fixed.

[0017] Furthermore, a self-leveling slurry is poured between the positioning cylinder and the positioning cylindrical head for filling and fixing.

[0018] Furthermore, after the self-leveling slurry is solidified, the connecting rod is pulled out, and an independent channel communicating with the wire dividing tube cavity in the wire dividing tube assembly is formed in the self-leveling slurry.

[0019] A method for manufacturing a bidirectional curved spatial saddle for a stay cable comprises the following steps:

[0020] ⅰ. Processing space bending wire tube assembly S1

[0021] The steel pipes are bent in space one by one, and then welded together to form wire pipe assemblies;

[0022] ⅱ. Welding positioning cylindrical head S2

[0023] Insert the wire distribution tube assembly into the positioning cylindrical head, and weld the wire distribution tube assembly and the positioning cylindrical head into one body;

[0024] ⅲ. Adjust and determine the installation parameters S3 of the elevation anchor plate

[0025] Positioning frames are set on both sides of the tower of the cable-stayed bridge, and the elevation anchor pads on both sides are welded to the positioning tubes on both sides respectively. After welding, they are placed on the positioning frames on both sides respectively, and the installation parameters between the elevation anchor pads are adjusted on the positioning frames;

[0026] ⅳ. Install the positioning cylindrical head S4

[0027] Remove the elevation anchor plate from the positioning frame, install the positioning cylindrical head into the positioning cylinder, and insert the connecting rods through the elevation anchor plate into the wire distribution tube assembly one by one;

[0028] ⅴ. Adjust and install the positioning cylindrical head S5

[0029] Adjust the depth of the positioning cylindrical head inserted into the positioning tube until the elevation anchor plate meets the installation parameters in step iii, and weld and fix the positioning cylindrical head and the positioning tube;

[0030] ⅵ. Fixed completion of saddle making S6

[0031] The self-leveling slurry is poured into the interior of the positioning cylinder. After the self-leveling slurry solidifies, the connecting rod is pulled out to form an independent channel, and the saddle is manufactured.

[0032] The beneficial effects of the present invention are as follows:

[0033] The present invention arranges a positioning cylindrical head at the end of the wire dividing tube assembly and a positioning cylinder at the end of the elevation anchor plate. Through the cooperation of the positioning cylindrical head and the positioning cylinder, the saddle can be easily adjusted to the specified parameter requirements, and the connecting rod is installed and the through hole of the steel pipe in the wire dividing tube assembly is blocked, and an independent channel is formed after being pulled out.

[0034] The present invention can simultaneously meet the use requirements of plane and space saddles, the manufacturing accuracy of the space saddle is greatly improved, the processing accuracy and size error are small, the processing technology difficulty is low, and it can meet the use of engineering applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a side sectional view of the prior art;

[0036] Figure 2 It is a top view of the prior art;

[0037] Figure 3 is a side sectional view of the present invention;

[0038] Figure 4It is a top view of the present invention.

[0039] Figure 5 It is a connection diagram of the connecting rod and the wire distribution tube assembly in the present invention;

[0040] Figure 6 is a cross-sectional view of the positioning tube in the present invention;

[0041] in:

[0042] 1 Wire pipe assembly 2 Elevation anchor plate

[0043] 3 Connecting rod 4 Positioning cylinder

[0044] 5 Positioning cylindrical head 6 Self-leveling slurry

[0045] 7 Reinforced ribs

[0046] 201 Through Hole

[0047] 301 connection end 302 disassembly end

[0048] 401 slide 501 convex rib

[0049] 601 Independent Channel. DETAILED DESCRIPTION

[0050] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments:

[0051] like Figures 3 to 6 As shown, a high-precision saddle includes a wire dividing tube assembly 1, and a positioning cylindrical head 5 is provided at the end of the wire dividing tube assembly 1. The positioning cylindrical head 5 is inserted and fixed into a positioning tube 4. An adjustment unit is formed between the positioning tube 4 and the positioning cylindrical head 5. The positioning tube 4 is fixed to the end face of the elevation anchor plate 2.

[0052] A connecting rod 3 is further provided between the elevation anchor plate 2 and the end of the wire distribution tube assembly 1 , and the connecting rod 3 includes a connecting end 301 and a disassembly end 302 of an integral structure.

[0053] The wire-dividing tube assembly 1 forms a wire-dividing tube cavity, and the connecting end 301 is inserted into and blocks the wire-dividing tube cavity.

[0054] A through hole 201 is formed in the elevation anchor plate 2 , and the connecting end 301 passes through the through hole 201 .

[0055] The adjustment unit includes a slide groove 401 formed on the wall of the positioning cylinder 4 , and a convex rib 501 is formed on the outer wall of the positioning cylindrical head 5 , and the convex rib 501 is inserted into the slide groove 401 .

[0056] The slide grooves 401 are arranged symmetrically in pairs, and the convex ribs 501 drive the positioning cylindrical head 5 to slide and adjust in the positioning cylinder 4.

[0057] After the adjustment of the adjustment unit is completed, the rib 501 and the slide groove 401 are spot welded and fixed.

[0058] The self-leveling slurry 6 is poured between the positioning cylinder 4 and the positioning cylindrical head 5 for filling and fixing.

[0059] After the self-leveling slurry 6 is cured, the connecting rod 3 is pulled out, and an independent channel 601 communicating with the wire-dividing tube cavity in the wire-dividing tube assembly 1 is formed in the self-leveling slurry 6 .

[0060] The wire-dividing pipe assembly 1 is a space-bending wire-dividing pipe assembly. The wire-dividing pipe assembly 1 is welded by a plurality of bidirectional space-bending steel pipes.

[0061] There is a clearance fit between the inner wall of the positioning tube 4 and the outer wall of the positioning cylindrical head 5 , so that the entry position of the positioning cylindrical head 5 can be adjusted easily.

[0062] The positioning tube 4 between the elevation anchor plate 2 and the positioning cylinder 5 is filled with a self-leveling slurry 6; when the connecting rod 3 is disassembled, the remaining middle cavity of the self-leveling slurry 6 forms an independent channel 601 corresponding to the wire distribution tube assembly 1 one by one.

[0063] Preferably, a reinforcing rib plate 7 is provided between the elevation anchor plate 2 and the outer wall of the positioning tube 4, and the reinforcing rib is fixed by welding. The reinforcing rib plate 7 improves the firmness of fixing the elevation anchor plate 2 and the positioning tube 4.

[0064] Correspondingly, there are four reinforcing rib plates 7 which are evenly distributed.

[0065] The convex rib 501 and the slide groove 401 are clearance-fitted, so as to facilitate the position adjustment of the positioning cylinder 5 in the positioning tube 4 along the axial direction.

[0066] Correspondingly, the through hole 201 and the connecting rod 3 are clearance fit. The connecting rod 3 and the pipe of the wire tube assembly 1 are interference fit.

[0067] Preferably, the length of the rib 501 is smaller than the length of the positioning cylinder 5, so that the concrete-wire pipe interface between the self-leveling slurry 6 and the positioning cylinder 5 has a step surface, thereby improving radial stability.

[0068] Preferably, the through hole 201 and the connecting rod 3 are clearance-matched, so that there is room for error when the connecting rod 3 is inserted into the pipe of the filament distribution tube assembly 1 .

[0069] Preferably, the connecting rod 3 and the pipe of the wire tube assembly 1 are interference fit, which is used to seal the pipe of the wire tube assembly 1 and prevent the self-leveling slurry 6 from flowing into the pipe of the sealed wire tube assembly 1 and causing blockage.

[0070] The working principle of high-precision space saddle is as follows:

[0071] In the high-precision spatial saddle of the present invention, the elevation anchor plate 2 and the wire dividing tube assembly 1 are assembled separately, and the elevation anchor plates 2 on both sides can be pre-positioned, that is, the key dimensions of the elevation anchor plate 2 can be controlled, and then they are processed separately from the wire dividing tube assembly 1, and then mixed with the self-leveling slurry 6, and the connecting rod 3 is used to form an independent channel corresponding to the wire dividing tube assembly 1 one by one, and the self-leveling slurry 6 is used for soft connection, so that the error of the wire dividing tube assembly 1 after bending can be corrected to meet the higher precision requirements.

[0072] A method for manufacturing a bidirectional curved spatial saddle for a stay cable comprises the following steps:

[0073] ⅰ. Processing space bending wire tube assembly

[0074] The steel pipes are bent spatially one by one, and then welded together to form a wire pipe assembly 1;

[0075] ⅱ. Welding positioning cylindrical head

[0076] Insert the wire distribution tube assembly 1 into the positioning cylindrical head 5, and weld the wire distribution tube assembly 1 and the positioning cylindrical head 5 into one body;

[0077] ⅲ. Adjust and determine the installation parameters of the elevation anchor plate

[0078] Positioning frames are set on both sides of the tower of the cable bridge, and the elevation anchor pads 2 on both sides are welded to the positioning tubes 4 on both sides respectively. After welding, they are placed on the positioning frames on both sides respectively, and the installation parameters of the elevation anchor pads 2 are adjusted on the positioning frames;

[0079] ⅳ. Install the positioning cylindrical head

[0080] Remove the elevation anchor plate 2 from the positioning frame, install the positioning cylindrical head 5 into the positioning tube 4, and insert the connecting rods 3 through the elevation anchor plate 2 and into the wire distribution tube assembly 1 one by one;

[0081] ⅴ. Adjust and install the positioning cylindrical head

[0082] Adjust the depth of the positioning cylindrical head 5 inserted into the positioning tube 4 until the elevation anchor plate 2 meets the installation parameters in step iii, and weld and fix the positioning cylindrical head 5 and the positioning tube 4;

[0083] ⅵ.Fixed completion of saddle production

[0084] The self-leveling slurry 6 is poured into the interior of the positioning tube 4, and after the self-leveling slurry 6 solidifies, the connecting rod 3 is pulled out to form an independent channel 601, and the saddle is manufactured.

[0085] The specific process of space bending in step ⅰ is as follows:

[0086] First, bend the single steel pipe flat according to the Rp radius.

[0087] Then, the single steel pipe is transversely bent according to Rh1 and Rh2. The bending size accuracy can be controlled according to the current process level, and the error only needs to be controlled within ±20mm.

[0088] The installation parameters of the high anchor plate in step ⅲ are as follows:

[0089] The installation parameters include the X-direction distance L between the elevation adjustment anchor pads 2 on the positioning frame;

[0090] The installation parameters include the Y-direction distance H between the elevation adjustment anchor pads 2 on the positioning frame;

[0091] The installation parameters include the horizontal angles α and β of the anchor pad 2 at two elevations;

[0092] After adjustment, record the values ​​of L, H, α and β.

[0093] Correspondingly, the elevation anchor plates 2 on both sides are the benchmark for the saddle size, and the key dimensions L and H are controlled with a dimensional accuracy of ±1 mm, and the positioning accuracy of the anchor plate inclination angles α and β is controlled within ±0.1°.

[0094] The bidirectional bending space saddle manufactured by the manufacturing method of the bidirectional bending space saddle for the inclined cable can be applied to the bidirectional space bending inclined cable of the inclined cable. The bending processing technology of the wire tube saddle adopts the conventional existing technology, uses the self-leveling slurry 6 to make a soft connection, and uses the connecting rod 3 to form an independent channel corresponding to the wire tube assembly 1 one by one. The error of the wire tube assembly 1 after bending can be corrected, and even if there is a large error, it can meet the requirements of engineering application.

[0095] The present invention arranges a positioning cylindrical head at the end of the wire dividing tube assembly and a positioning cylinder at the end of the elevation anchor plate. Through the cooperation of the positioning cylindrical head and the positioning cylinder, the saddle can be easily adjusted to the specified parameter requirements, and the connecting rod is installed and the through hole of the steel pipe in the wire dividing tube assembly is blocked, and an independent channel is formed after being pulled out.

[0096] The present invention can simultaneously meet the use requirements of plane and space saddles, the manufacturing accuracy of the space saddle is greatly improved, the processing accuracy and size error are small, the processing technology difficulty is low, and it can meet the use of engineering applications.

Claims

1. A method for manufacturing a bidirectional curved space saddle for a stay cable, Features: The cable saddle comprises a wire distribution tube assembly (1), the end of which is provided with a positioning cylindrical head (5), the positioning cylindrical head (5) being inserted and fixed into a positioning tube (4), an adjustment unit being formed between the positioning tube (4) and the positioning cylindrical head (5), and the positioning tube (4) being fixed to the end surface of the elevation anchor plate (2); The manufacturing method thereof comprises the following steps: (i) Processing space bending wire tube assembly The steel pipes are bent spatially one by one, and then welded together to form a filament pipe assembly (1); (ii) Welding positioning cylindrical head Inserting the wire distribution tube assembly (1) into the positioning cylindrical head (5), and welding the wire distribution tube assembly (1) and the positioning cylindrical head (5) together; (iii) Adjust and determine the installation parameters of the elevation anchor plate Positioning frames are arranged on both sides of the tower of the cable bridge, and the elevation anchor plates (2) on both sides are respectively welded to the positioning tubes (4) on both sides. After the welding, they are respectively placed on the positioning frames on both sides, and the installation parameters between the elevation anchor plates (2) are adjusted on the positioning frames; (iv) Insert the positioning cylindrical head The elevation anchor plate (2) is removed from the positioning frame, the positioning cylindrical head (5) is installed into the positioning tube (4), and the connecting rods (3) are inserted into the wire distribution tube assembly (1) through the elevation anchor plate (2) one by one; (v) Adjust and install the positioning cylindrical head Adjust the depth of the positioning cylindrical head (5) inserted into the positioning tube (4) until the elevation anchor plate (2) meets the installation parameters in step (iii), and weld and fix the positioning cylindrical head (5) and the positioning tube (4); (ⅵ) Fixed the completion of the saddle production The self-leveling slurry (6) is poured into the interior of the positioning tube (4), and after the self-leveling slurry (6) solidifies, the connecting rod (3) is pulled out to form an independent channel (601), thereby completing the production of the cable saddle.

2. A method for manufacturing a bidirectional curved spatial saddle for a stay cable according to claim 1, Features: The adjustment unit comprises a slide groove (401) formed on the wall of the positioning cylinder (4), a convex rib (501) is formed on the outer wall of the positioning cylindrical head (5), and the convex rib (501) is inserted into the slide groove (401).

3. A method for manufacturing a bidirectional curved spatial saddle for a stay cable according to claim 2, Features: The slide grooves (401) are symmetrically arranged in pairs, and the convex ribs (501) drive the positioning cylindrical head (5) to slide and adjust in the positioning cylinder (4).

4. A method for manufacturing a bidirectional curved spatial saddle for a stay cable according to claim 3, Features: After the adjustment of the adjustment unit is completed, the convex rib (501) and the slide groove (401) are fixed by spot welding.

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