Tensioning structure of steel inhaul cable

Abstract

The utility model relates to the technical field of prestressed steel structures, in particular to a tensioning structure of a steel inhaul cable, which comprises an inhaul cable adjusting end and an inhaul cable fixing end which are fixedly arranged on a component, an inhaul cable piece is arranged inside the inhaul cable adjusting end, a cable head is fixedly arranged outside the inhaul cable piece, a carrying pole beam is detachably arranged on one side of the cable head, and a steel cable is arranged on the carrying pole beam. Tensioning rods penetrate through the two sides of the interior of the carrying pole beam, jacks are arranged outside the tensioning rods, the output ends of the jacks are connected with the carrying pole beam, one end of each tensioning rod is in threaded connection with an anchoring nut, and a thrust piece is arranged on the other side of the cable head. Jacking force is applied to the jack through the hydraulic oil pump, the carrying pole beam is subjected to reverse pressure due to limitation of the anchoring nut, so that the carrying pole beam pushes the cable head to drive the inhaul cable piece to move in the reverse direction, the inhaul cable piece is stretched, the fastening nut is fastened once every time the inhaul cable piece is pulled, and the fastening nut is fastened once through a wrench until tensioning is completed. The thrust piece provides reverse tension for the cable head, the tensioning force and the tensioning speed are improved, and the construction efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of prestressed steel structure technology, and in particular to a tensioning structure for steel cables. Background Technology

[0002] Steel cable tensioning is a core process in prestressed engineering, widely used in structures such as cable-stayed bridges, suspension bridges, large-span roofs, and stadiums. Its purpose is to actively apply tension to generate prestress in the structure before it bears a load, thereby improving its stiffness and load-bearing capacity. Currently, the cables are mainly forked-ear bidirectional screw cables, which can be divided into fixed ends and adjustable ends. The steel cables are tensioned through a tensioning structure.

[0003] In the prior art, such as the patent with publication number CN208533377U, a tooling device for tensioning cables in steel anchor boxes is disclosed, including a tensioning rod, a tensioning cylinder, a spreader beam, and a jack. The tensioning cylinder is a two-part assembly structure, and the upper end of the tensioning cylinder is connected to the spreader beam by a stop structure. The spreader beam is also a two-part assembly structure, with a slot in the middle for the cable to pass through, and round holes on both sides for the tensioning rod to pass through and screw holes for the bolts to pass through.

[0004] The above structure uses jacks for tensioning, which has the advantage of centering the connection of cables. However, during the tensioning process, it is impossible to increase the tension force and tensioning speed, resulting in low construction efficiency. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a tensioning structure for steel cables to solve the problems of low construction efficiency due to the inability to increase tension force and tensioning speed.

[0006] To achieve the above objectives, this utility model provides a tensioning structure for a steel cable, comprising a cable adjustment end and a cable fixing end fixedly installed on a component. The cable adjustment end has a cable component inside, and a cable head is fixedly installed on the outside of the cable component. One side of the cable head is fixedly connected to the cable fixing end.

[0007] A spreader beam is detachably installed on one side of the cable head. Tensioning rods are threaded through both sides of the spreader beam. A jack is installed on the outside of the tensioning rod. The output end of the jack is connected to the spreader beam. An anchor nut is threaded to one end of the tensioning rod, which is close to the end of the jack. A welding piece is inserted into the other end of the tensioning rod and welded to the component. A fastening nut is threaded to the outside of the tensioning rod.

[0008] A thrust member is provided on the other side of the cable head, which is used to provide reverse thrust.

[0009] Preferably, the thrust member includes a steel sleeve that is fitted onto the outside of the cable adjustment end, and two sets of push rods are passed through the inside of the steel sleeve. A support frame is fixedly installed at one end of each push rod, and the support frame is fitted onto the outside of the cable member.

[0010] The other end of the push rod is movably mounted with a contact wheel. Both sides of the contact wheel abut against reaction seats. A frame seat is slidably mounted on one side of each of the two sets of reaction seats. Multiple sets of second springs are fixedly connected between the reaction seats and the steel sleeve seat. Multiple sets of first springs are fixedly connected between the frame seat and the steel sleeve seat. One end of each set of second springs is connected to the other side of the reaction seat. One end of each set of first springs is connected to the other side of the frame seat. The other ends of both the sets of second springs and the sets of first springs are connected to the inner wall of the steel sleeve seat.

[0011] Preferably, both the spreader beam and the support frame are openable structures, and the spreader beam and the support frame are located on both sides of the cable head.

[0012] Preferably, the push rod is arranged in a mirror symmetry with respect to the center of the support frame, and the tension rod is arranged in a mirror symmetry with respect to the center of the spreader beam.

[0013] Preferably, at least three sets of both the first and second springs are provided, and the frame base has a U-shaped structure.

[0014] Preferably, one side of the reaction seat is inclined, and the reaction seat is arranged in a mirror symmetrical manner with respect to the center of the frame.

[0015] The beneficial effects of this utility model are:

[0016] The hydraulic pump applies a jacking force, and the anchor nut restricts the spreader beam to a reverse pressure, causing the spreader beam to push the cable head and move the cable component in the opposite direction to stretch the cable component. Each time the cable is tensioned, the anchor nut is tightened with a wrench until the tensioning is complete. During tensioning, the thrust component provides a reverse pulling force to the cable head each time the cable is tensioned, which increases the tensioning force and tensioning speed, resulting in high construction efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a top view of the cable component of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the steel sleeve of this utility model.

[0021] The following are marked in the diagram: 1. Cable fixed end; 2. Cable adjusting end; 3. Cable head; 4. Cable component; 5. Spreader beam; 6. Tensioning rod; 7. Jack; 8. Anchor nut; 9. Fastening nut; 10. Welded component; 11. Thrust component; 12. Support frame; 13. Push rod; 14. Steel sleeve seat; 15. First spring; 16. Frame seat; 17. Second spring; 18. Reaction seat; 19. Adhesive wheel; 20. Lifting lug; 21. Winch. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, a tensioning structure for a steel cable includes a cable adjusting end 2 and a cable fixing end 1 fixedly installed on a component. A cable member 4 is provided inside the cable adjusting end 2, and a cable head 3 is fixedly installed on the outside of the cable member 4. One side of the cable head 3 is fixedly connected to the cable fixing end 1.

[0024] A spreader beam 5 is detachably installed on one side of the cable head 3. Tensioning rods 6 pass through both sides of the spreader beam 5. A jack 7 is installed on the outside of the tensioning rod 6. The output end of the jack 7 is connected to the spreader beam 5. An anchor nut 8 is threaded to one end of the tensioning rod 6. The anchor nut 8 is close to the end of the jack 7. A welding part 10 is inserted into the other end of the tensioning rod 6. The welding part 10 is welded to the component. A fastening nut 9 is threaded to the outside of the tensioning rod 6.

[0025] A thrust member 11 is provided on the other side of the cable head 3, which is used to provide reverse thrust.

[0026] In this embodiment, the hydraulic pump applies a jacking force to the jack 7. Due to the restriction of the anchor nut 8, the spreader beam 5 is subjected to reverse pressure, which causes the spreader beam 5 to push the cable head 3 and drive the cable member 4 to move in the opposite direction to stretch the cable member 4. Each time the cable is tensioned, the tightening nut 9 is tightened with a wrench until the tensioning is completed. During tensioning, each time the cable is tensioned, the thrust member 11 provides a reverse pulling force to the cable head 3 to improve the tensioning efficiency.

[0027] As one implementation method, such as Figure 2 and Figure 3As shown, the thrust member 11 includes a steel sleeve 14 sleeved on the outside of the cable adjustment end 2. Two sets of push rods 13 pass through the inside of the steel sleeve 14. A support frame 12 is fixedly installed at one end of the push rod 13. The support frame 12 is sleeved on the outside of the cable member 4.

[0028] The other end of the push rod 13 is movably mounted with a contact wheel 19. Both sides of the contact wheel 19 abut against a reaction seat 18. A frame seat 16 is slidably mounted on one side of the two sets of reaction seats 18. Multiple sets of second springs 17 are fixedly connected between the reaction seat 18 and the steel sleeve seat 14. Multiple sets of first springs 15 are fixedly connected between the frame seat 16 and the steel sleeve seat 14. One end of the multiple sets of second springs 17 is connected to the other side of the reaction seat 18, and one end of the multiple sets of first springs 15 is connected to the other side of the frame seat 16. The other ends of the multiple sets of second springs 17 and the multiple sets of first springs 15 are all connected to the inner wall of the steel sleeve seat 14.

[0029] In this embodiment, during tensioning, on the other side of the cable head 3, due to the combination of the support frame 12 and the push rod 13, when the cable member 4 is stretched, the push rod 13 is subjected to the reverse thrust of the first spring 15 and the second spring 17, and the reaction seat 18 simultaneously squeezes towards the middle, driving the push rod 13 to push the cable head 3. Each time tensioning occurs, the push member 11 provides a reverse pulling force to the cable head 3.

[0030] As one implementation method, such as Figure 1 , Figure 2 As shown, both the spreader beam 5 and the support frame 12 are openable structures, and the spreader beam 5 and the support frame 12 are located on both sides of the cable head 3.

[0031] In this embodiment, the cable head 3 is connected to one side by an openable flat beam 5, and the cable head 3 is connected to the other side by an openable support frame 12. The flat beam 5 tensions the cable head 3, and the support frame 12 provides thrust.

[0032] As one implementation method, such as Figure 1 , Figure 2 As shown, push rod 13 is arranged in a mirror symmetry with respect to the center of support frame 12, and tension rod 6 is arranged in a mirror symmetry with respect to the center of spreader beam 5.

[0033] In this embodiment, two sets of jacks 7 are synchronously controlled to simultaneously tension two tension rods 6, with simultaneous tensioning on both sides, while two sets of push rods 13 synchronously push the cable head 3 to stretch.

[0034] As one implementation method, such as Figure 3 As shown, the first spring 15 and the second spring 17 are each provided with at least three sets, and the frame 16 has a U-shaped structure.

[0035] In this embodiment, multiple sets of first springs 15 and second springs 17 are set to apply reverse thrust to the cable head 3, thereby optimizing the tensioning operation.

[0036] As one implementation method, such as Figure 3 As shown, one side of the reaction seat 18 is set with an inclined surface, and the reaction seat 18 is set in a mirror symmetrical manner with the center of the frame seat 16 as the reference.

[0037] In this embodiment, the push rod 13 is subjected to the reverse thrust of the first spring 15 and the second spring 17. Since the reaction seat 18 is an inclined surface, the reaction seat 18 is squeezed towards the middle under the action of the second spring 17. At the same time, the first spring 15 pushes outward, which drives the support frame 12 at one end of the push rod 13 to push the cable head 3. Each time tensioning occurs, the thrust member 11 provides a reverse pulling force to the cable head 3, thereby improving the tensioning efficiency.

[0038] Working principle: During use, the hydraulic pump applies a jacking force to the jack 7. Due to the restriction of the anchor nut 8, the spreader beam 5 is subjected to reverse pressure, causing the spreader beam 5 to push the cable head 3 and drive the cable member 4 to move in the opposite direction, thus stretching the cable member 4. Each time the cable is stretched, the tightening nut 9 is tightened with a wrench until the tensioning is completed. At the same time, on the other side of the cable head 3, due to the combination of the support frame 12 and the push rod 13, when the cable member 4 is stretched, the push rod 13 is subjected to the reverse thrust of the first spring 15 and the second spring 17. Since the reaction seat 18 is inclined, under the action of the second spring 17, the reaction seat 18 is squeezed in the middle at the same time. At the same time, the first spring 15 pushes the frame seat 16 outward, which drives the support frame 12 at one end of the push rod 13 to push the cable head 3. Each time the cable is stretched, the push member 11 provides a reverse pulling force to the cable head 3.

[0039] Meanwhile, lifting lugs are installed on the component, and a winch is used to assist in traction on the lifting lugs 20. At the same time, the wind-resistant cable on the winch is wrapped around the outside of the cable head 3 to stabilize the cable body.

[0040] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0041] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tensioning structure for a steel cable, comprising a cable adjusting end (2) and a cable fixing end (1) fixedly installed on a component, wherein a cable member (4) is provided inside the cable adjusting end (2), and a cable head (3) is fixedly installed outside the cable member (4), and one side of the cable head (3) is fixedly connected to the cable fixing end (1), characterized in that... ； A flat beam (5) is detachably installed on one side of the cable head (3). Tensioning rods (6) are threaded through both sides of the flat beam (5). A jack (7) is installed on the outside of the tensioning rod (6). The output end of the jack (7) is connected to the flat beam (5). An anchor nut (8) is threaded to one end of the tensioning rod (6). The anchor nut (8) is close to the end of the jack (7). A welding part (10) is inserted into the other end of the tensioning rod (6). The welding part (10) is welded to the component. A fastening nut (9) is threaded to the outside of the tensioning rod (6). A thrust member (11) is provided on the other side of the cable head (3), which is used to provide reverse thrust.

2. The tensioning structure for a steel cable according to claim 1, characterized in that, The thrust member (11) includes a steel sleeve (14) sleeved on the outside of the cable adjustment end (2). Two sets of push rods (13) are passed through the inside of the steel sleeve (14). A support frame (12) is fixedly installed at one end of the push rod (13). The support frame (12) is sleeved on the outside of the cable member (4). The other end of the push rod (13) is movably mounted with a contact wheel (19). Both sides of the contact wheel (19) abut against a reaction seat (18). A frame seat (16) is slidably mounted on one side of the two sets of reaction seats (18). Multiple sets of second springs (17) are fixedly connected between the reaction seat (18) and the steel sleeve seat (14). Multiple sets of first springs (15) are fixedly connected between the frame seat (16) and the steel sleeve seat (14). One end of the multiple sets of second springs (17) is connected to the other side of the reaction seat (18), and one end of the multiple sets of first springs (15) is connected to the other side of the frame seat (16). The other ends of the multiple sets of second springs (17) and the multiple sets of first springs (15) are both connected to the inner wall of the steel sleeve seat (14).

3. The tensioning structure for a steel cable according to claim 2, characterized in that, The flat beam (5) and the support frame (12) are both openable structures, and the flat beam (5) and the support frame (12) are located on both sides of the cable head (3).

4. The tensioning structure for a steel cable according to claim 2, characterized in that, The push rod (13) is set in a mirror symmetry with respect to the center of the support frame (12), and the tension rod (6) is set in a mirror symmetry with respect to the center of the spreader beam (5).

5. The tensioning structure for a steel cable according to claim 2, characterized in that, The first spring (15) and the second spring (17) are each provided with at least three sets, and the frame (16) is a U-shaped structure.

6. The tensioning structure for a steel cable according to claim 2, characterized in that, One side of the reaction seat (18) is set with an inclined surface, and the reaction seat (18) is set in a mirror symmetrical manner with respect to the center of the frame seat (16).

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