Steel cable auxiliary threading device and method thereof

Abstract

The application discloses a steel cable auxiliary threading device and a method thereof, and belongs to the technical field of steel cable threading, which comprises an alternate installation structure, a supporting assembly and a recovery mechanism. The alternate installation structure comprises half-ring-shaped supporting plates one, half-ring-shaped supporting plates two, fixed hoop plates one, fixed hoop plates two and a connecting assembly. A plurality of the half-ring-shaped supporting plates one and the half-ring-shaped supporting plates two are alternately distributed on a cable body. The half-ring-shaped supporting plate one and the fixed hoop plate one are connected through the connecting assembly, and the half-ring-shaped supporting plate two and the fixed hoop plate two are connected through the connecting assembly. The supporting assembly comprises an outer rolling supporting structure and an inner buffer ball structure. The outer rolling supporting structure is installed on the outer side of the half-ring-shaped supporting plate one, the half-ring-shaped supporting plate two and the fixed hoop plate one, and the inner buffer ball structure is installed on the inner side of the outer rolling supporting structure. The recovery mechanism is symmetrically distributed outside a prestressed pipeline. In the above manner, the resistance of the cable body to threading is reduced, and the auxiliary device is convenient to move out.

Description

Technical Field

[0001] This invention relates to the field of steel cable threading technology, and specifically to a steel cable auxiliary threading device and method. Background Technology

[0002] During the construction of prestressed bridge decks, steel cables must first be threaded through the prestressed ducts pre-installed on the bridge deck. After the cables are threaded through the ducts, they are tightened and the cable ends are fixed to the bridge deck to apply prestress. During this process, due to the large weight of the steel cables, they sag under gravity when passing through the prestressed ducts, causing friction between the cables and the inner wall of the ducts. This makes it difficult for the cables to pass through the ducts directly, so equipment is needed to assist in the cable threading process.

[0003] For example, Chinese patent CN117335325B discloses an auxiliary tool for cable threading through a conduit. This auxiliary tool is connected to the cable through a retainer and a pressure mechanism, so that the rolling elements on the retainer roll into contact with the inner wall of the conduit, thereby facilitating cable threading.

[0004] However, this auxiliary tool has the problem of leaving part of the support inside the pipe; and after the steel cable passes through the prestressed bridge slab, the auxiliary tool needs to be completely removed to avoid affecting the stress on the prestressed bridge slab structure. Based on this, the present invention designs a steel cable auxiliary threading device and method to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a steel cable auxiliary threading device and method.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A cable-assisted threading device includes an alternating installation structure and a support assembly. The alternating installation structure includes a semi-circular support plate 1, a semi-circular support plate 2, a fixing hoop 1, a fixing hoop 2, and a connecting assembly. Two semi-circular support plates 1 in each group are connected by bolts; two semi-circular support plates 2 in each group are connected by bolts; two fixing hoop 1s are connected by bolts; two fixing hoop 2s are connected by bolts; multiple sets of semi-circular support plates 1 and multiple sets of semi-circular support plates 2 are alternately distributed on the cable body; multiple sets of semi-circular support plates 1 are sequentially connected by the connecting assembly, with the outermost set of semi-circular support plates 1 being the most common. Plate 1 and fixed hoop 1 are connected by a connecting assembly. Multiple sets of semi-circular support plates 2 are connected sequentially by a connecting assembly. The outermost set of semi-circular support plates 2 and fixed hoop 2 are connected by a connecting assembly. Fixed hoop 2 is located between fixed hoop 1 and semi-circular support plate 1. Fixed hoop 1 is used to connect to the drive end of an external traction device. The support assembly includes an outer rolling support structure and an inner buffer ball structure. An outer rolling support structure is installed on semi-circular support plate 1, semi-circular support plate 2 and fixed hoop 1. An inner buffer ball structure that can contact the steel cable is installed on the inner side of each outer rolling support structure.

[0008] Furthermore, the connecting assembly includes an arc-shaped plate and multiple connecting cables. The multiple connecting cables are arranged in two groups, with the multiple connecting cables in each group being distributed in a circumferential array at equal intervals. One end of one group of connecting cables is fixedly connected to a fixed hoop plate 1 via an arc-shaped plate, and the other end passes through multiple groups of semi-circular support plates 1 in sequence, with each semi-circular support plate 1 in each group being fixedly connected to the connecting cable via an arc-shaped plate. One end of the other group of connecting cables is fixedly connected to a fixed hoop plate 2 via an arc-shaped plate, and the other end passes through multiple groups of semi-circular support plates 2 in sequence, with each semi-circular support plate 2 in each group being fixedly connected to the connecting cable via an arc-shaped plate.

[0009] Furthermore, the first semi-circular support plate has equally spaced wire holes for the connecting cable connected to the second semi-circular support plate to pass through, the second semi-circular support plate has equally spaced wire holes for the connecting cable connected to the first semi-circular support plate to pass through, and the second fixing plate has equally spaced wire holes for the connecting cable connected to the first semi-circular support plate to pass through.

[0010] Furthermore, the outer rolling support structure includes an outer mounting cylinder and outer balls. Multiple outer mounting cylinders are fixedly installed on the outer sides of the semi-annular support plate one, the semi-annular support plate two, and the fixing hoop plate one, and are spaced apart along the circumferential direction. Each outer mounting cylinder has a circular groove at its outer end, and an outer ball can be rolled in the circular groove at the end of each outer mounting cylinder.

[0011] Furthermore, the inner buffer ball structure includes an inner mounting cylinder, an annular step, inner balls, and a spring. Each outer mounting cylinder has a limiting mounting groove at its inner end. The bottom of the inner mounting cylinder is fixedly mounted with an annular step. The inner mounting cylinder can slide along the radial direction of the cable within the limiting mounting groove and be limited by the annular step. The spring is located within the limiting mounting groove and is used to apply a spring force to the inner mounting cylinder in a direction away from the outer balls. A circular groove is provided at the inner end of the inner mounting cylinder, and the inner balls are rotatably disposed within the circular groove at the inner end of the inner mounting cylinder.

[0012] Furthermore, the cable-assisted threading device also includes a retrieval mechanism, which is located outside the prestressed duct. The retrieval mechanism includes a fixed plate, a guide assembly, and a traction assembly. The fixed plate is equipped with a guide assembly for guiding the connecting cable, and the fixed plate is equipped with a traction assembly for connecting with the arc-shaped plate. The traction assembly can pull the arc-shaped plate to move so that the connecting cable passes through the guide assembly.

[0013] Furthermore, the guiding assembly includes a guiding hydraulic module, a mounting frame, and guide wheels. The guiding hydraulic module is mounted on a fixed plate, and the moving end of the guiding hydraulic module is fixedly mounted with the mounting frame. Multiple guide wheels are rotatably mounted on the inner side of the mounting frame. The guiding hydraulic module is used to drive the mounting frame to move toward the connecting assembly so that the guide wheels can make rolling contact with the connecting cable.

[0014] Furthermore, the traction assembly includes a traction linear module, a clearance hydraulic module, and a connecting mounting plate. The traction linear module is fixedly mounted on the fixed plate, and the clearance hydraulic module is fixedly mounted on the moving end of the traction linear module. The connecting mounting plate is fixedly mounted on the moving end of the clearance hydraulic module. The clearance hydraulic module is used to adjust the position of the connecting mounting plate to align with the arc-shaped plates on different components. The connecting mounting plate is used to connect the arc-shaped plates. The traction linear module is used to drive the clearance hydraulic module to move the arc-shaped plates away from the prestressed pipe.

[0015] Furthermore, at least two clamping plates are fixedly installed in a circumferential array on the connecting mounting plate, and the clamping plates can engage with the arc-shaped plate; both the clamping plates and the arc-shaped plate are provided with through holes that can communicate with each other, so that bolts can pass through the through holes on the clamping plates and the arc-shaped plate to fix the clamping plates and the arc-shaped plate.

[0016] To better achieve the objectives of this invention, this invention also provides a method for threading steel cables, comprising the following steps:

[0017] Step 1: Fix the two fixing plates 1 and 2 to the cable head of the steel cable respectively; fix the two semi-circular support plates 1 and 2 in each group to the outside of the steel cable body with bolts, so that the cable body presses on the semi-circular support plates 1 and 2, at which time the inner buffer ball structure is compressed.

[0018] Step 2: The traction device drives the fixed hoop plate 1 and fixed hoop plate 2 through the traction rope to move the cable head and cable body into the prestressed pipe. At the same time, the fixed hoop plate 1 and fixed hoop plate 2 respectively drive the semi-circular support plate 1 and semi-circular support plate 2 to move into the prestressed pipe in sequence through the connecting components until the cable head passes through the prestressed pipe.

[0019] Step 3: Remove the first and second fixing plates from the cable head in sequence; and pull the cable heads at both ends of the cable body with the external tensioning equipment to tighten the cable body, reduce the force of the cable body directly acting on the semi-circular support plate 1 and semi-circular support plate 2, so that the inner buffer ball structure can be reset and support the cable body.

[0020] Step 4: The traction device pulls the fixed hoop plate 1 to move, and drives multiple sets of semi-circular support plates 1 to move in the prestressed duct through the connecting components until the semi-circular support plate 1 moves to the position of abutting or approaching the semi-circular support plate 2, then proceed to step 5.

[0021] Step 5: The recovery mechanism connects sequentially to the arc-shaped plates on the fixed hoop plate 2 or the semi-circular support plate 2. The recovery mechanism drives the arc-shaped plates to move outward, thereby driving multiple sets of semi-circular support plates 2 to move within the prestressed duct until the semi-circular support plates 2 abut or approach the semi-circular support plate 1. Then, Step 4 is repeated until all semi-circular support plates 1 and 2 are detached from the prestressed duct, completing the recovery of the alternating installation structure.

[0022] Compared with the prior art, the beneficial effects of this invention are as follows: 1. When the cable is threaded through the pipe, it is supported by a semi-circular support plate one and a semi-circular support plate two; at this time, the inner buffer ball structure is compressed under the gravity of the cable, ensuring the support area of ​​the cable during the threading process and avoiding local pressure damage to the cable; the outer rolling support structure rolls into contact with the inner wall of the prestressed pipe, reducing the friction force that needs to be overcome for movement, making it easier for the steel cable to pass through the prestressed pipe, thereby avoiding contact between the cable head and the cable body and the inner wall of the prestressed pipe, which would lead to wear.

[0023] 2. After the cable passes through the prestressed duct, the cable heads at both ends of the cable are pulled by external tensioning equipment to tighten the cable, thereby reducing the force exerted by the cable on the first and second semi-circular support plates. Combined with the restoring force of the internal buffer ball structure, the cable moves upward relative to the first and second semi-circular support plates, thereby reducing the resistance to the recovery of the first and second semi-circular support plates.

[0024] 3. During disassembly and recycling, the recycling mechanism and traction device alternately drive the semi-circular support plate one and the semi-circular support plate two to move through the connecting components until the semi-circular support plate one and the semi-circular support plate two are completely detached from the prestressed duct, completing the recycling of the semi-circular support plate one and the semi-circular support plate two and realizing their reuse. During this process, the outer sides of the semi-circular support plate one and the semi-circular support plate two roll in contact with the inner wall of the prestressed duct through the outer rolling support structure, and the inner sides of the semi-circular support plate one and the semi-circular support plate two roll in contact with the steel cable through the inner buffer ball structure, thereby reducing the resistance to removing the semi-circular support plate one and the semi-circular support plate two.

[0025] 4. During dismantling and recycling, the semi-circular support plate one and semi-circular support plate two move alternately. When semi-circular support plate one moves, the cable body is supported by the adjacent semi-circular support plate two and its inner buffer ball bearing structure. When semi-circular support plate two moves, the cable body is supported by the adjacent semi-circular support plate one and its inner buffer ball bearing structure. This makes the dismantling process smoother, the force more even, and reduces excessive friction on the inner wall of the prestressed duct. Furthermore, in long-distance prestressed ducts, the required dismantling force is small, the outward movement distance at each step is short, the force is controllable, and the dismantling risk is reduced. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0027] Figure 1 A three-dimensional representation of a steel cable auxiliary threading device according to the present invention. Figure 1 ;

[0028] Figure 2 This is a front view of a cable-assisted threading device according to the present invention;

[0029] Figure 3 A three-dimensional representation of a steel cable auxiliary threading device according to the present invention. Figure 2 ;

[0030] Figure 4 A schematic diagram of the fixing plate and its connection structure;

[0031] Figure 5 A schematic diagram of the fixed hoop plate 2 and its connection structure;

[0032] Figure 6 This is a schematic diagram of the internal ball bearings and their connecting structure.

[0033] Figure 7 This is a schematic diagram of the support frame and its connecting structure;

[0034] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0035] The labels in the diagram represent:

[0036] 1. Alternating installation structure; 11. Semi-circular support plate one; 12. Semi-circular support plate two; 13. Fixing hoop one; 131. Connecting rope; 132. Traction disc; 133. Traction cable; 14. Fixing hoop two; 15. Ear plate; 16. Connecting assembly; 161. Arc plate; 162. Connecting cable; 163. Cable hole; 2. Support assembly; 21. Outer rolling support structure; 211. Outer mounting cylinder; 212. Outer ball bearing; 22. Inner buffer ball bearing structure; 2 21. Limiting mounting groove; 222. Inner mounting cylinder; 223. Annular step; 224. Inner ball bearing; 225. Spring; 3. Recycling mechanism; 31. Fixing plate; 32. Guide assembly; 321. Support frame; 322. Guide hydraulic module; 323. Mounting frame; 324. Guide wheel; 33. Traction assembly; 331. Traction linear module; 332. Yielding hydraulic module; 333. Connecting mounting plate; 334. Clamping plate; 41. Cable head; 42. Cable body. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0039] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-5 A cable-assisted threading device includes an alternating installation structure 1, a support assembly 2, and a retrieval mechanism 3; as shown... Figures 2-5As shown, the alternating installation structure 1 includes a semi-circular support plate 11, a semi-circular support plate 12, a fixing plate 13, a fixing plate 14, and a connecting assembly 16. Two semi-circular support plates 11 in each group are bolted together, two semi-circular support plates 12 in each group are bolted together, and two fixing plates 13 are bolted together, connecting the fixing plates 13 to the cable head 41; two fixing plates 14 are bolted together, connecting the fixing plates 14 to the cable head 41. Multiple sets of semi-circular support plates 11 and multiple sets of semi-circular support plates 12 are alternately distributed on the cable body 42; multiple sets of semi-circular support plates 11 are connected sequentially by the connecting assembly 16, the outermost set of semi-circular support plates 11 and fixing plates 13 are connected by the connecting assembly 16, multiple sets of semi-circular support plates 12 are connected sequentially by the connecting assembly 16, and the outermost set of semi-circular support plates 12 and fixing plates 14 are connected by the connecting assembly 16.

[0040] Specifically, the alternating installation structure 1 also includes ear plates 15. Ear plates 15 are fixedly installed at the ends of semi-annular support plate one 11, semi-annular support plate two 12, fixing hoop plate one 13, and fixing hoop plate two 14. The two semi-annular support plates one 11 in each group are fixed with bolts and ear plates 15; the two semi-annular support plates two 12 in each group are fixed with bolts and ear plates 15; the two fixing hoop plates one 13 are fixed with bolts and ear plates 15, so that the fixing hoop plates one 13 are tightly fitted with the cable head 41; the two fixing hoop plates two 14 are fixed with bolts and ear plates 15, so that the fixing hoop plates two 14 are tightly fitted with the cable head 41.

[0041] like Figure 4 As shown, in one embodiment, the support assembly 2 includes an outer rolling support structure 21 and an inner buffer ball structure 22. The outer rolling support structure 21 is installed on each of the semi-annular support plate 11, the semi-annular support plate 22, and the fixing hoop 13. An inner buffer ball structure 22 capable of contacting the steel cable is installed on the inner side of each outer rolling support structure 21. Specifically, multiple outer rolling support structures 21 are installed in a circumferential array at equal intervals on the outer sides of the semi-annular support plate 11, the semi-annular support plate 22, and the fixing hoop 13. The fixing hoop 13 is connected to the drive end of the external traction device.

[0042] In this embodiment, when the cable-assisted threading device is working normally, two fixing plates 13 are clamped onto the end of the cable head 41, aligning the ear plates 15 at the ends of the fixing plates 13, and then tightened with bolts, so that the fixing plates 13 and the cable head 41 are tightly connected by static friction. The fixing plates 13 are then connected to one end of the traction rope, and the other end of the traction rope passes through the prestressed pipe and is fixedly connected to the output end of the traction device. Two fixing plates 14 are clamped onto the middle of the cable head 41, aligning the ear plates 15 at the ends of the fixing plates 14, and tightened with bolts, so that the fixing plates 13 and the cable head 41 are tightly connected by static friction.

[0043] Align the ear plates 15 at the ends of the two semi-annular support plates 11 and 12 in each group, and fix them with bolts; support the cable body 42 through the semi-annular support plates 11 and 12, and press the inner buffer ball structure 22 on the inner side of the semi-annular support plates 11 and 12, so that the cable body 42 presses against the inner wall of the semi-annular support plates 11 and 12, and is supported by the semi-annular support plates 11 and 12; at this time, the inner buffer ball structure 22 is compressed.

[0044] The traction device moves the fixed hoop plate 13 and fixed hoop plate 14 into the prestressed duct via the traction rope, thereby moving the cable head 41 and cable body 42 into the prestressed duct. At the same time, the connecting assembly 16 moves the semi-circular support plate 11 and semi-circular support plate 12 into the prestressed duct in sequence. Thus, the outer rolling support structure 21 rolls into contact with the inner wall of the prestressed duct, reducing the friction force that needs to be overcome for movement, making it easier for the cable head 41 and cable body 42 to pass through the prestressed duct. This avoids contact between the cable head 41 and cable body 42 and the inner wall of the prestressed duct, which would cause wear.

[0045] After the cable head 41 at one end of the cable body 42 passes through the prestressed duct, the fixing plates 13 and 14 are removed in sequence. This prevents the cable head 41 and cable body 42 from moving when the fixing plates 13 and 14 move. At the same time, the cable heads 41 at both ends of the cable body 42 are pulled by the external tensioning equipment, which tightens the cable body 42. This reduces the force exerted by the cable body 42 directly on the semi-circular support plates 11 and 12. Combined with the restoring force of the inner buffer ball bearing structure 22, the cable body 42 moves upward relative to the semi-circular support plates 11 and 12.

[0046] During disassembly and recycling, the fixing plate 13 and fixing plate 24 are pulled alternately from the outside of the prestressed duct, thereby moving the semi-circular support plate 11 and semi-circular support plate 212 until they are completely detached from the prestressed duct. This completes the recycling of the semi-circular support plate 11 and semi-circular support plate 212, facilitating their use in subsequent pipe threading operations and enabling their reuse.

[0047] During this process, the outer sides of the semi-circular support plate 11 and the semi-circular support plate 22 roll into contact with the inner wall of the prestressed pipe through the outer rolling support structure 21, and the inner sides of the semi-circular support plate 11 and the semi-circular support plate 22 roll into contact with the steel cable through the inner buffer ball structure 22, thereby reducing the resistance to removing the semi-circular support plate 11 and the semi-circular support plate 22.

[0048] Simultaneously, by alternating the movement of semi-annular support plate 11 and semi-annular support plate 12, the cable body 42 is supported by the adjacent semi-annular support plate 12 and the inner buffer ball structure 22 on the inner side of the semi-annular support plate 12 when the semi-annular support plate 11 moves, and by maintaining support for the cable body 42 by the adjacent semi-annular support plate 11 and the inner buffer ball structure 22 when the semi-annular support plate 12 moves. This further reduces the force exerted by the cable body 42 on the semi-annular support plate 11, semi-annular support plate 12, and inner buffer ball structure 22, facilitating smooth movement, making the disassembly process more stable, the force more even, and reducing excessive friction on the inner wall of the prestressed duct. Furthermore, in long-distance prestressed ducts, the required disassembly force is small, the outward movement distance at each step is short, the force is controllable, and the disassembly risk is reduced.

[0049] Example 2: In some embodiments, such as Figure 1 , Figure 3 and Figure 5 As shown, as a preferred embodiment of the present invention, such as Figure 4 and Figure 5 As shown, the connecting ropes 131 are evenly distributed in a circular array with equal spacing. One end of the connecting rope 131 is fixedly connected to the fixed hoop plate 13, and the other end of the connecting rope 131 is fixedly connected to the traction disc 132 of the traction device. One end of the traction cable 133 of the traction device is fixedly connected to the traction disc 132.

[0050] In some embodiments, the connecting component 16 includes an arc-shaped plate 161 and multiple connecting cables 162. The multiple connecting cables 162 are arranged in two groups, and the multiple connecting cables 162 in each group are distributed in a circumferential array at equal intervals. One end of one group of connecting cables 162 is fixedly connected to a fixing hoop 13 through an arc-shaped plate 161, and the other end of the connecting cable 162 passes through multiple groups of semi-annular support plates 11 in sequence. Each semi-annular support plate 11 in each group is fixedly connected to the connecting cable 162 through an arc-shaped plate 161. One end of the other group of connecting cables 162 is fixedly connected to a fixing hoop 14 through an arc-shaped plate 161, and the other end passes through multiple groups of semi-annular support plates 12 in sequence. Each semi-annular support plate 12 in each group is fixedly connected to the connecting cable 162 through an arc-shaped plate 161.

[0051] Specifically, the semi-circular support plate 11 is provided with equally spaced wire holes 163 for the connecting cable 162 connected to the semi-circular support plate 12 to pass through, the semi-circular support plate 12 is provided with equally spaced wire holes 163 for the connecting cable 162 connected to the semi-circular support plate 11 to pass through, and the fixing plate 14 is provided with equally spaced wire holes 163 for the connecting cable 162 connected to the semi-circular support plate 11 to pass through.

[0052] like Figure 5 and Figure 6 As shown, in some embodiments, the outer rolling support structure 21 includes an outer mounting cylinder 211 and an outer ball bearing 212. Multiple outer mounting cylinders 211 are fixedly installed on the outer sides of the semi-annular support plate 11, the semi-annular support plate 22 and the fixing hoop plate 13, and are spaced apart along the circumferential direction. Each outer mounting cylinder 211 has a circular groove at its outer end, and an outer ball bearing 212 can be rolled in the circular groove at the end of each outer mounting cylinder 211.

[0053] Specifically, the inner buffer ball structure 22 includes an inner mounting cylinder 222, an annular step 223, an inner ball 224, and a spring 225. The inner end of the outer mounting cylinder 211 has a limiting mounting groove 221. The bottom of the inner mounting cylinder 222 is fixedly mounted with the annular step 223. The inner mounting cylinder 222 can slide within the limiting mounting groove 221 along the radial direction of the cable 42 and is limited by the annular step 223. The spring 225 is located within the limiting mounting groove 221 and applies a spring force to the inner mounting cylinder 222 in a direction away from the outer ball 212. The inner end of the inner mounting cylinder 222 has a circular groove, and the inner ball 224 is rotatably disposed within the circular groove at the inner end of the inner mounting cylinder 222. Further, one end of the spring 225 is fixedly connected to the annular step 223, and the other end of the spring 225 is fixedly connected to the outer mounting cylinder 211.

[0054] like Figure 3 , Figure 7 and Figure 8As shown, in one embodiment, the cable-assisted threading device further includes a retrieval mechanism 3, which is located outside the prestressed duct. Specifically, there are two retrieval mechanisms 3, symmetrically distributed outside the prestressed duct. The retrieval mechanisms 3 can be connected to the semi-annular support plate 12 or the fixed hoop plate 14. From the outside of the prestressed duct, the fixed hoop plate 13 and the fixed hoop plate 14 are pulled alternately by the traction device and the retrieval mechanism 3, thereby driving the semi-annular support plate 11 and the semi-annular support plate 12 to move until the semi-annular support plate 11 and the semi-annular support plate 12 are completely detached from the prestressed duct, thus completing the retrieval of the semi-annular support plate 11 and the semi-annular support plate 12.

[0055] Specifically, the recycling mechanism 3 includes a fixed plate 31, a guide component 32, and a traction component 33. The fixed plate 31 is equipped with a guide component 32 for guiding the connecting cable 162, and the fixed plate 31 is equipped with a traction component 33 for connecting with the arc plate 161. The traction component 33 can pull the arc plate 161 to move so that the connecting cable 162 passes through the guide component 32.

[0056] Furthermore, the guide assembly 32 includes a guide hydraulic module 322, a mounting frame 323, and guide wheels 324. The guide hydraulic module 322 is mounted on the fixed plate 31. The mounting frame 323 is fixedly mounted on the moving end of the guide hydraulic module 322. Multiple guide wheels 324 are rotatably mounted on the inner side of the mounting frame 323. The guide hydraulic module 322 is used to drive the mounting frame 323 to move toward the connecting assembly 16, so that the guide wheels 324 are in rolling connection with the connecting cable 162. In this embodiment, the guide assembly 32 also includes a support frame 321, which is fixedly mounted on the fixed plate 31. The guide hydraulic module 322 is fixedly mounted on the support frame 321.

[0057] In one embodiment, the traction assembly 33 includes a traction linear module 331, a clearance hydraulic module 332, and a connecting mounting plate 333. The traction linear module 331 is fixedly mounted on the fixed plate 31. The clearance hydraulic module 332 is fixedly mounted on the moving end of the traction linear module 331. The connecting mounting plate 333 is fixedly mounted on the moving end of the clearance hydraulic module 332. The clearance hydraulic module 332 is used to adjust the position of the connecting mounting plate 333 so as to align with the arc plate 161 on different components. The connecting mounting plate 333 is used to connect the arc plate 161. The traction linear module 331 is used to drive the clearance hydraulic module 332 to move the arc plate 161 away from the prestressed pipe.

[0058] Specifically, at least two clamping plates 334 are fixedly mounted in a circumferential array on the connecting mounting plate 333, and the clamping plates 334 can engage with the arc-shaped plate 161. Both the clamping plates 334 and the arc-shaped plate 161 have interconnected through holes, so that bolts can pass through the through holes on the clamping plates 334 and the arc-shaped plate 161 to fix the clamping plates 334 and the arc-shaped plate 161.

[0059] In this embodiment, under traction, the cable 42 is supported by the semi-annular support plate 11 and the semi-annular support plate 22. The cable 42 presses down on the inner ball bearings 224 inside the semi-annular support plate 11 and the semi-annular support plate 222. The inner ball bearings 224 drive the inner mounting cylinder 222 to move within the limiting mounting groove 221, so that the inner mounting cylinder 222 and the inner ball bearings 224 are compressed within the limiting mounting groove 221, and the spring 225 is compressed. At this time, the cable 42 is pressed on the semi-annular support plate 11 and the semi-annular support plate 22. The semi-annular support plate 11 and the semi-annular support plate 22 support the cable 42, thereby ensuring the support area of ​​the cable 42 during the tube insertion process and avoiding local compression of the cable 42 by the inner ball bearings 224 during the tube insertion process.

[0060] The traction device moves the fixed hoop plate 13 and fixed hoop plate 24 into the prestressed duct via the traction rope, thereby moving the cable head 41 and cable body 42 into the prestressed duct. At the same time, the arc plate 161 and connecting cable 162 move the semi-circular support plate 11 and semi-circular support plate 22 into the prestressed duct in sequence. Thus, the outer ball bearing 212 at the end of the outer mounting cylinder 211 rolls into contact with the inner wall of the prestressed duct, reducing the friction force that needs to be overcome for movement, making it easier for the cable head 41 and cable body 42 to pass through the prestressed duct.

[0061] After the cable head 41 at one end of the cable body 42 passes through the prestressed duct, the cable heads 41 at both ends of the cable body 42 are pulled by the external tensioning equipment to tighten the cable body 42, thereby reducing the weight of the cable body 42 acting directly on the semi-annular support plate 11 and the semi-annular support plate 22. At this time, the spring 225 resets and drives the inner mounting cylinder 222 and the limiting mounting groove 221 to reset, so that the inner ball 224 at the inner end of the inner mounting cylinder 222 contacts the cable body 42. Thus, when the semi-annular support plate 11 and the semi-annular support plate 22 move, the inner ball 224 rolls in contact with the cable body 42, reducing the moving resistance and facilitating the movement of the semi-annular support plate 11 and the semi-annular support plate 22.

[0062] The first and second fixing plates 13 and 14 at the ends are disassembled. The traction device pulls the connecting cable 162 through the traction rope, connecting rope 131, traction disc 132, traction cable 133, and the first fixing plate 13, thereby moving the semi-annular support plate 11 connected to it. The clearance hydraulic module 332 drives the connecting mounting plate 333 and the clamping plate 334 to align with the arc-shaped plate 161, clamping the clamping plate 334 with the arc-shaped plate 161 on the second fixing plate 14 and securing it with bolts. The guide hydraulic module 322 drives the mounting bracket 323 to move toward the connecting assembly 16, so that the guide wheel 324 makes rolling contact with the connecting cable 162. Then, the traction linear module 331 moves the arc plate 161 outward by giving way to the hydraulic module 332, connecting mounting plate 333 and clamping plate 334. This causes the semi-annular support plate 12 to move through the connecting cable 162 and the arc plate 161 until the semi-annular support plate 12 moves to a position that touches or approaches the adjacent semi-annular support plate 11. At this time, the traction device, connecting cable 162 and arc plate 161 move the semi-annular support plate 11 again until the end semi-annular support plate 11 moves to the outside of the prestressed pipe, and the semi-annular support plate 11 is removed.

[0063] Then, the traction linear module 331 continues to move the arc plate 161, connecting cable 162, and the semi-annular support plate 12 connected thereto via the yielding hydraulic module 332, connecting mounting plate 333, and clamping plate 334. After the semi-annular support plate 12 at the end moves to the outside of the prestressed duct, it is removed, allowing the yielding hydraulic module 332, traction linear module 331, and guiding hydraulic module 322 to reset. The yielding hydraulic module 332 drives the connecting mounting plate 333 and clamping plate 334 to align with the arc plate 161, connecting the clamping plate 334 to the arc plate 161 on the semi-annular support plate 12 that has just moved to the outside of the prestressed duct. The above operation is repeated, alternately moving the semi-annular support plate 11 and the semi-annular support plate 12 out of the prestressed duct.

[0064] During this process, the outer sides of the semi-circular support plate 11 and the semi-circular support plate 22 roll into contact with the inner wall of the prestressed duct through the outer ball bearings 212, and the inner sides of the semi-circular support plate 11 and the semi-circular support plate 222 roll into contact with the steel cable through the inner ball bearings 224, thereby reducing the resistance to removing the semi-circular support plate 11 and the semi-circular support plate 222.

[0065] Example 3: In some embodiments, such as Figures 1-8 As shown, in a preferred embodiment of the present invention, a method for threading steel cables includes the following steps:

[0066] Step 1: Fix the two fixing plates 13 and 14 to the cable head 41 of the steel cable respectively; fix the two semi-circular support plates 11 and 12 in each group to the outside of the cable body 42 of the steel cable with bolts, so that the cable body 42 presses on the semi-circular support plates 11 and 12, at which time the inner buffer ball structure 22 is compressed.

[0067] Step 2: The traction device drives the fixed hoop plate 13 and fixed hoop plate 214 through the traction rope to move the traction cable head 41 and cable body 42 into the prestressed pipe. At the same time, the fixed hoop plate 13 and fixed hoop plate 214 respectively drive the semi-circular support plate 11 and semi-circular support plate 212 to move into the prestressed pipe in sequence through the connecting component 16 until the cable head 41 passes through the prestressed pipe.

[0068] Step 3: Remove the first fixing plate 13 and the second fixing plate 14 from the cable head 41 in sequence; and pull the cable heads 41 at both ends of the cable body 42 with the external tensioning equipment to tighten the cable body 42, reduce the force of the cable body 42 directly acting on the semi-circular support plate 11 and the semi-circular support plate 22, so that the inner buffer ball structure 22 is reset and supports the cable body 42.

[0069] Step 4: The traction device pulls the fixed hoop plate 13 to move, and drives multiple sets of semi-circular support plates 11 to move in the prestressed duct through the connecting component 16 until the semi-circular support plate 11 moves to the position of abutting or approaching the semi-circular support plate 2 12, then proceed to step 5.

[0070] Step 5: The recovery mechanism 3 connects sequentially to the arc plate 161 on the fixed hoop plate 2 14 or the semi-circular support plate 2 12. The recovery mechanism 3 drives the arc plate 161 to move outward, thereby driving multiple sets of semi-circular support plates 2 12 to move within the prestressed duct until the semi-circular support plate 2 12 abuts against or approaches the semi-circular support plate 1 11. Then, Step 4 is repeated until all semi-circular support plates 1 11 and semi-circular support plates 2 12 are detached from the prestressed duct, thus completing the recovery of the alternating installation structure 1.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cable-assisted threading device, comprising an alternating installation structure (1) and a support assembly (2), characterized in that: The alternating installation structure (1) includes a semi-circular support plate one (11), a semi-circular support plate two (12), a fixing plate one (13), a fixing plate two (14), and a connecting component (16). The two semi-circular support plates one (11) in each group are connected by bolts, the two semi-circular support plates two (12) in each group are connected by bolts, the two fixing plates one (13) are connected by bolts, and the two fixing plates two (14) are connected by bolts. The connecting component (16) includes an arc plate (161) and multiple connecting cables (162). The multiple connecting cables (162) are arranged in two groups, and the multiple connecting cables (162) in each group are distributed in a circumferential array at equal intervals. Multiple sets of semi-circular support plates (11) and multiple sets of semi-circular support plates (12) are alternately distributed on the cable body (42). One end of a set of connecting cables (162) is fixedly connected to a fixed hoop plate (13) through an arc plate (161), and the other end passes through multiple sets of semi-circular support plates (11) in sequence. Each semi-circular support plate (11) in each set is fixedly connected to the connecting cable (162) through an arc plate (161). One end of another set of connecting cables (162) is fixedly connected to a fixed hoop plate (14) through an arc plate (161), and the other end passes through multiple sets of semi-circular support plates (12) in sequence. Each semi-circular support plate (12) in each set is fixedly connected to the fixed hoop plate (14) through an arc plate (161). Fixed connection with connecting cable (162); the semi-circular support plate one (11) is provided with equally spaced wire holes (163) for the connecting cable (162) connected to the semi-circular support plate two (12) to pass through, the semi-circular support plate two (12) is provided with equally spaced wire holes (163) for the connecting cable (162) connected to the semi-circular support plate one (11) to pass through, the fixed hoop plate two (14) is provided with equally spaced wire holes (163) for the connecting cable (162) connected to the semi-circular support plate one (11) to pass through; the fixed hoop plate two (14) is located between the fixed hoop plate one (13) and the semi-circular support plate one (11); the fixed hoop plate one (13) is used to connect with the drive end of the external traction device; The support assembly (2) includes an outer rolling support structure (21) and an inner buffer ball structure (22). The outer rolling support structure (21) is installed on the semi-circular support plate one (11), the semi-circular support plate two (12) and the fixed hoop plate one (13). The inner side of each outer rolling support structure (21) is equipped with an inner buffer ball structure (22) that can contact the steel cable.

2. The cable-assisted threading device according to claim 1, characterized in that, The outer rolling support structure (21) includes an outer mounting cylinder (211) and an outer ball bearing (212). Multiple outer mounting cylinders (211) are fixedly installed on the outer sides of the semi-annular support plate one (11), the semi-annular support plate two (12) and the fixed hoop plate one (13). Each outer mounting cylinder (211) has a circular groove at its outer end, and an outer ball bearing (212) can be rolled in the circular groove at the end of each outer mounting cylinder (211).

3. The cable-assisted threading device according to claim 2, characterized in that, The inner buffer ball structure (22) includes an inner mounting cylinder (222), an annular step (223), an inner ball (224), and a spring (225). Each outer mounting cylinder (211) has a limiting mounting groove (221) at its inner end. The annular step (223) is fixedly installed at the bottom of the inner mounting cylinder (222). The inner mounting cylinder (222) can slide along the radial direction of the cable (42) in the limiting mounting groove (221) and be limited by the annular step (223). The spring (225) is located in the limiting mounting groove (221) and is used to apply a spring force to the inner mounting cylinder (222) in a direction away from the outer ball (212). A circular groove is opened at the inner end of the inner mounting cylinder (222), and the inner ball (224) is rotatably arranged in the circular groove at the inner end of the inner mounting cylinder (222).

4. The cable-assisted threading device according to any one of claims 1-3, characterized in that, The cable-assisted threading device also includes a retrieval mechanism (3), which is located outside the prestressed pipe. The retrieval mechanism (3) includes a fixed plate (31), a guide assembly (32), and a traction assembly (33). The fixed plate (31) is equipped with a guide assembly (32) for guiding the connecting cable (162). The fixed plate (31) is equipped with a traction assembly (33) for connecting with the arc plate (161). The traction assembly (33) can pull the arc plate (161) to move so that the connecting cable (162) passes through the guide assembly (32).

5. The cable-assisted threading device according to claim 4, characterized in that, The guide assembly (32) includes a guide hydraulic module (322), a mounting frame (323), and guide wheels (324). The guide hydraulic module (322) is mounted on a fixed plate (31). The moving end of the guide hydraulic module (322) is fixedly mounted with the mounting frame (323). Multiple guide wheels (324) are rotatably mounted on the inner side of the mounting frame (323). The guide hydraulic module (322) is used to drive the mounting frame (323) to move toward the connecting assembly (16) so that the guide wheels (324) can roll into contact with the connecting cable (162).

6. The cable-assisted threading device according to claim 4, characterized in that, The traction assembly (33) includes a traction linear module (331), a clearance hydraulic module (332), and a connecting mounting plate (333). The traction linear module (331) is fixedly mounted on the fixed plate (31). The clearance hydraulic module (332) is fixedly mounted on the moving end of the traction linear module (331). The connecting mounting plate (333) is fixedly mounted on the moving end of the clearance hydraulic module (332). The clearance hydraulic module (332) is used to adjust the position of the connecting mounting plate (333) so as to align with the arc plate (161) on different components. The connecting mounting plate (333) is used to connect the arc plate (161). The traction linear module (331) is used to drive the clearance hydraulic module (332) to move the arc plate (161) away from the prestressed pipe.

7. The cable-assisted threading device according to claim 6, characterized in that, At least two clamping plates (334) are fixedly installed in a circular array on the connecting mounting plate (333). The clamping plates (334) can be engaged with the arc plate (161). Both the clamping plates (334) and the arc plate (161) have through holes that can communicate with each other, so that bolts can pass through the through holes on the clamping plates (334) and the arc plate (161) to fix the clamping plates (334) and the arc plate (161).

8. A method for threading a steel cable, utilizing the steel cable auxiliary threading device as described in claim 7, characterized in that, The method for threading steel cables includes the following steps: Step 1: Fix the two fixing plates 1 (13) and 2 fixing plates 2 (14) to the cable head (41) of the steel cable respectively; fix the two semi-circular support plates 1 (11) and 2 semi-circular support plates 2 (12) in each group to the outside of the cable body (42) of the steel cable with bolts, so that the cable body (42) presses on the semi-circular support plates 1 (11) and 2 semi-circular support plates 2 (12), at which time the inner buffer ball structure (22) is compressed; Step 2: The traction device drives the fixed hoop plate 1 (13) and fixed hoop plate 2 (14) through the traction rope to move the cable head (41) and cable body (42) into the prestressed pipe. At the same time, the fixed hoop plate 1 (13) and fixed hoop plate 2 (14) respectively drive the semi-circular support plate 1 (11) and semi-circular support plate 2 (12) through the connecting component (16) to move into the prestressed pipe in sequence until the cable head (41) passes through the prestressed pipe. Step 3: Unlock the first fixing plate (13) and the second fixing plate (14) from the cable head (41) in sequence; and pull the cable heads (41) at both ends of the cable body (42) with the external tensioning equipment to tighten the cable body (42), reduce the force of the cable body (42) directly acting on the semi-circular support plate (11) and the semi-circular support plate (12), and reset the inner buffer ball structure (22) to support the cable body (42). Step 4: The traction device pulls the fixed hoop plate 1 (13) to move, and drives multiple sets of semi-circular support plates 1 (11) to move in the prestressed pipe through the connecting component (16) until the semi-circular support plate 1 (11) moves to the position of abutting or approaching the semi-circular support plate 2 (12), then step 5 is executed; Step 5: The recovery mechanism (3) connects in sequence with the arc plate (161) on the fixed hoop plate 2 (14) or the semi-circular support plate 2 (12), and the recovery mechanism (3) drives the arc plate (161) to move outward to drive multiple sets of semi-circular support plates 2 (12) to move in the prestressed pipe until the semi-circular support plate 2 (12) abuts or approaches the semi-circular support plate 1 (11), then step 4 is repeated until all semi-circular support plates 1 (11) and semi-circular support plates 2 (12) are detached from the prestressed pipe, and the recovery of the alternating installation structure (1) is completed.

Images