Large-diameter UU-shaped steel pull rod tensioning tool and method

Abstract

The present application relates to a kind of simple large-diameter UU type steel pull rod tensioning tool, including UU type steel pull rod, U-shaped cable, straight cable, flat clamping piece type sight assembly and jack tensioning assembly;U-shaped cable is wound on the joint lug of UU type steel pull rod both ends, straight cable both ends are respectively each connected one flat clamping piece type sight assembly, flat clamping piece type sight assembly connects the end of U-shaped cable, the joint lug of UU type steel pull rod both ends is in the same side and is set as a group, its corresponding connection U-shaped cable, flat clamping piece type sight assembly and straight cable are in uniform plane, jack tensioning assembly is set to one side of one flat clamping piece type sight assembly, and is connected straight cable.The advantages of the present application are that the tensioning tool is simple to assemble, can avoid the problem of low tensioning work efficiency caused by traditional manual torque wrench and hydraulic device, improve the tensioning operation efficiency, can be applied to different sizes of tensioning object, and has strong applicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cantilever beam rigid pull rod tensioning, in particular to a large-diameter UU type steel pull rod tensioning tool and method. BACKGROUND

[0002] At present, in the design and construction process of large steel structure landscape bridge, in order to realize the overall form of the bridge, the non-motor vehicle lane of the steel structure bridge is usually designed in the form of large cantilever, and at the same time, in order to save materials, the cantilever part often uses high-strength steel pull rod instead of traditional box-shaped tension member. At present, there are mainly two ways of steel pull rod tensioning: one is to adjust the screw thread of the screw rod by manual operation of the torque wrench to control the applied prestress, but this method is mainly suitable for small-diameter (not more than 50mm) steel pull rod, and the tensioning efficiency is low, and the applied prestress cannot be accurately controlled; the second is to tension the prestressed tendon by hydraulic device, so as to control the applied prestress, but usually a special tensioning tool needs to be specially made, and the installation operation process is complex, which affects the tensioning progress to some extent. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides a large-diameter UU type steel pull rod tensioning tool, which comprises a UU type steel pull rod, a U-shaped cable, a straight cable, a flat clamping type sight assembly and a jack tensioning assembly; the U-shaped cable is wound on the joint ear plates at both ends of the UU type steel pull rod, one flat clamping type sight assembly is connected to each end of the straight cable, the flat clamping type sight assembly is connected to the end of the U-shaped cable, the joint ear plates at both ends of the UU type steel pull rod are on the same side and are arranged as a group, the U-shaped cable, the flat clamping type sight assembly and the straight cable connected correspondingly are in the same plane, and the jack tensioning assembly is arranged on one side of one of the flat clamping type sight assemblies and connected to the straight cable.

[0004] Further, the flat clamping type sight assembly comprises a flat anchor ring and a clamping piece; the end of the U-shaped cable passes through the through holes on both sides of the flat anchor ring and is clamped on one side of the flat anchor ring by the clamping piece, one end of the straight cable passes through the through hole of the flat anchor ring and is clamped on the other side of the flat anchor ring by the clamping piece, and the other end of the straight cable is connected to the flat anchor ring of the other flat clamping type sight assembly through the jack tensioning assembly.

[0005] Further, the jack tensioning assembly comprises a through-hole hydraulic jack, a limiting plate, a tool anchor plate and an end cover plate; the other end of the straight cable passes through the flat anchor ring and the through-hole hydraulic jack in sequence and is further connected to the limiting plate, the tool anchor plate and the end cover plate in sequence; the through-hole hydraulic jack abuts against the flat anchor ring.

[0006] Further, the joint ear plate of the UU-shaped steel pull rod is connected with other steel structure ear plates through the pin shaft assembly.

[0007] Further, a safety rope is arranged on the U-shaped cable, the safety rope is arranged around the joint ear plate joint of the UU-shaped steel pull rod, and the two U-shaped cables arranged around the two joint ear plates of the UU-shaped steel pull rod end can be fixed by winding.

[0008] Further, the flat anchor ring is provided with five through holes and is arranged in rows; the two ends of the U-shaped cable are connected by penetrating the through holes at the two ends of the flat anchor ring, and the straight cable is connected after penetrating the third through hole in the middle of the flat anchor ring.

[0009] To sum up, the beneficial technical effects of the present application are: the tensioning tool is simple to assemble, can avoid the low tensioning work efficiency caused by the traditional manual torque wrench and hydraulic device, improves the tensioning operation efficiency, and can be applied to tensioning objects of different sizes, and has strong applicability.

[0010] Another aspect of the present application provides a large-diameter UU-shaped steel pull rod tensioning method, which applies the tensioning tool of any one of the above to tension, and comprises the following steps:

[0011] Step one, assemble the tool, the joint ear plates at the two ends of the UU-shaped steel pull rod are arranged as a group on the same side, two U-shaped cables are arranged around the joint ear plates in the same group respectively, the ends of the two U-shaped cables are connected with a group of flat clamping piece type sighting device assemblies respectively, and the two flat clamping piece type sighting device assemblies are connected together through a straight cable;

[0012] Step two, install the force applying machine, connect the jack tensioning assembly at one end of the straight cable, and install the jack tensioning assembly on the flat clamping piece type sighting device assembly;

[0013] Step three, bind the safety rope, bind the safety rope on the side of the joint ear plate of the UU-shaped steel pull rod close to the screw rod;

[0014] Step four, tension the UU-shaped steel pull rod, manually control the jack tensioning assembly to apply a part of the force, pre-tension to eliminate the assembly gap of the tensioning tool, continue to control the jack tensioning assembly to apply the prestress until the design requirement is met, complete the tensioning, then release the pressure, and move the tensioning tool to the next UU-shaped steel pull rod to be tensioned.

[0015] Further, in step one, the center axis plane of the same group of U-shaped cables is in the same plane as the center section in the thickness direction of the joint ear plate.

[0016] Further, in the step four, during the tensioning process, the pressure of the jack tensioning assembly is manually controlled to apply the prestress until the design requirements are met, the screw rod and the locking nut of the UU-shaped steel tension rod are manually tightened by the chain wrench, and the prestress application is completed.

[0017] Further, in the step four, during the tensioning process, the pressure of the jack tensioning assembly is manually controlled to apply the prestress until the design requirements are met, the screw rod and the locking nut of the UU-shaped steel tension rod are manually tightened by the chain wrench, and the prestress application is completed.

[0018] To sum up, the tensioning method has the advantages of simple operation, good tensioning effect and high tensioning operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other objects, features and advantages of the present application will become more apparent from the following description of embodiments of the present application taken in conjunction with the accompanying drawings. The drawings are intended to illustrate preferred embodiments of the present application and thus do not purport to be an exhaustive list of the present application. In the drawings, like reference numerals indicate like parts throughout the several views.

[0020] Figure 1 is a structural front view of the tensioning tool of the present application;

[0021] Figure 2 is a structural side view of the tensioning tool of the present application;

[0022] Figure 3 is a structural schematic view of the flat-shaped clamp type sight assembly in the present application;

[0023] Figure 4 is another perspective structural schematic view of the flat-shaped clamp type sight assembly in the present application;

[0024] Figure 5 is a structural schematic view of the through-jack tensioning assembly in the present application;

[0025] Figure 6 is a flowchart of the method of the present application;

[0026] In the drawings, 1 is a U-shaped cable, 2 is a straight cable, 3 is a flat-shaped clamp type sight assembly, 4 is a jack tensioning assembly, 5 is a UU-shaped steel tension rod, 6 is another steel structure ear plate, 7 is a pin shaft assembly, and 8 is a safety rope.

[0027] 31 is a flat-shaped anchor ring, 32 is a clamp, 33 is a through hole, 41 is a through-jack hydraulic jack, 42 is a limiting plate, 43 is a tool anchor plate, 44 is an end cover plate, 51 is a joint ear plate, 52 is a straight tension rod screw rod, and 53 is a locking nut. DETAILED DESCRIPTION Further, in the step four, during the tensioning process, the pressure of the jack tensioning assembly is manually controlled to apply the prestress until the design requirements are met, the screw rod and the locking nut of the UU-shaped steel tension rod are manually tightened by the chain wrench, and the prestress application is completed.

[0028] The present application will be further described below in conjunction with the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0029] Referring to Figures 1-2 As shown in the drawings, the present application discloses a large-diameter UU steel rod tensioning tool, which comprises a UU steel rod 5, a U-shaped cable 1, a straight cable 2, a flat clamping sight assembly 3 and a jack tensioning assembly 4. The U-shaped cable 1 is arranged around the joint lug 51 at both ends of the UU steel rod 5. The straight cable 2 is connected with one flat clamping sight assembly 3 at each end. The flat clamping sight assembly 3 is connected with the end of the U-shaped cable 1. The joint lug 51 at both ends of the UU steel rod 5 is arranged on the same side and is connected with the corresponding U-shaped cable 1, flat clamping sight assembly 3 and straight cable 2 in the same plane. The jack tensioning assembly 4 is arranged on one side of the flat clamping sight assembly 3 and is connected with the straight cable 2.

[0030] Referring to Figures 1-4 As shown in the drawings, the flat clamping sight assembly 3 comprises a flat anchor ring 31 and a clamping piece 32. The end of the U-shaped cable 1 passes through the through hole 33 on both sides of the flat anchor ring 31 and is clamped on one side of the flat anchor ring 31 by the clamping piece 32. One end of the straight cable 2 passes through the through hole 33 of the flat anchor ring 31 and is clamped on the other side of the flat anchor ring 31 by the clamping piece 32. The other end of the straight cable 2 is connected to the flat anchor ring 31 of the other flat clamping sight assembly 3 through the jack tensioning assembly 4.

[0031] Referring to Figure 5 As shown in the drawings, the jack tensioning assembly 4 comprises a through hydraulic jack 41, a limiting plate 42, a tool anchor plate 43 and an end cover plate 44. The other end of the straight cable 2 passes through the flat anchor ring 31 and the through hydraulic jack 41 and is sequentially connected with the limiting plate 42, the tool anchor plate 43 and the end cover plate 44. The through hydraulic jack 41 abuts against the flat anchor ring 31.

[0032] Continuing to refer to Figures 1-2 As shown in the drawings, the joint lug 51 of the UU steel rod 5 is connected with other steel structure lug 6 through the pin shaft assembly 7.

[0033] Referring to Figures 1-2As shown, the U-shaped cable 1 is also provided with a safety rope 8, which is arranged around the joint of the joint ear plate 51 of the UU steel rod, and can be used to fix the two U-shaped cables 1 arranged around the two joint ear plates 51 at the end of the UU steel rod.

[0034] Referring to Figures 3-4 As shown, the flat anchor ring 31 is provided with five through holes, and is arranged in an array; the two ends of the U-shaped cable 1 are connected through the through holes 33 at the two ends of the flat anchor ring 31, and the straight cable 2 is connected after passing through the middle third through hole of the flat anchor ring 31.

[0035] To sum up, the beneficial technical effects of the present application are: the tensioning tool is easy to assemble, can avoid the low tensioning work efficiency caused by the traditional manual torque wrench and hydraulic device, improves the tensioning operation efficiency, and can be applied to tensioning objects of different sizes, and has strong applicability.

[0036] Referring to Figure 6 As shown, another aspect of the present application also discloses a large-diameter UU steel rod tensioning method, which comprises the following steps: step one, assembling the tool, arranging the joint ear plates at the two ends of the UU steel rod into a group on the same side, arranging two U-shaped cables around the joint ear plates in the same group, connecting the ends of the two U-shaped cables with a group of flat clamping piece type sighting device assemblies, and connecting the two flat clamping piece type sighting device assemblies together through a straight cable, and the specific connection form is shown in Figures 1-2 As shown; step two, installing the force applying machine, connecting the jack tensioning assembly to one end of the straight cable, and installing the jack tensioning assembly on one side of the flat clamping piece type sighting device assembly; step three, binding the safety rope, binding the safety rope on the side of the joint ear plate of the UU steel rod close to the screw rod, and the specific binding form is shown in Figures 1-2 As shown; step four, tensioning the UU steel rod, manually controlling the jack tensioning assembly to apply a part of the force to pre-tension and eliminate the assembly gap of the tensioning tool, continuing to control the jack tensioning assembly to apply the prestress until the design requirements are met, completing the tensioning, and then releasing the pressure and moving the tensioning tool to the next UU steel rod to be tensioned.

[0037] In this embodiment, in step one, the center axis plane of the same group of U-shaped cables is in the same plane as the center section in the thickness direction of the joint ear plate, as shown in Figures 1-2 .

[0038] In this embodiment, in step four, when pre-tensioning, the jack tensioning assembly is manually controlled to apply a part of the force, so that the U-shaped cable closely contacts the joint ear plate of the steel rod, the straight cable is just taut, the clamping piece locks the cable, and the assembly gap of the tensioning tool and the steel rod, and the tensioning tool itself is eliminated, so that the tensioning force is normally applied.

[0039] In the fourth step of the embodiment, the pressure of the jack tensioning assembly is manually controlled during the tensioning process to apply prestress until the design requirements are met, the screw rod and locking nut of the UU-shaped steel rod are manually tightened by a chain wrench, and the application of prestress is completed.

[0040] In summary, the tensioning method has the advantages of simple operation, good tensioning effect and high tensioning operation efficiency.

[0041] A preferred embodiment of the large-diameter UU-shaped steel rod tensioning method disclosed in the present application is as follows:

[0042] The simple tensioning tool is composed of a flat clamping sight assembly 3, a U-shaped cable 1, a straight cable 2 and a jack tensioning assembly 4, wherein the flat clamping sight assembly 3 is composed of a flat anchor ring 31 with an opening and a clamping piece 32, and the through-hole hydraulic jack tensioning assembly is composed of a through-hole hydraulic jack 41, a limiting plate 42, a tool anchor plate 43 and an end cover plate 44;

[0043] After the tensioning tool is assembled and formed, in the first step, four U-shaped cables 1 are respectively wrapped around four steel rod joint lug plates 51 of the UU-shaped steel rod 5, and the plane where the central axis of the U-shaped cable is located is in the same plane as the central section in the thickness direction of the steel rod joint lug plate 51, so as to ensure balanced force transmission distribution, one group of flat clamping sight assemblies 3 is connected to the end of each U-shaped cable 1, and the clamping piece 32 is temporarily locked to prevent the U-shaped cable 1 and the straight cable 2 from sliding;

[0044] In the second step, the straight cable 2 passes through the through hole 33 reserved in the middle of the flat clamping sight assembly 3, one end is locked by the clamping piece 32, and the other end is connected to the through-hole hydraulic jack 41, the clamping piece 32, the limiting plate 42, the tool anchor plate 43 and the end cover plate 44 are adjusted, and the U-shaped cable and the straight cable are locked;

[0045] In the third step, two safety ropes 8 are tied near the side of the UU-shaped steel rod joint lug plate 51 close to the steel rod screw rod 52 to prevent the U-shaped cable 1 from bouncing outwards during the tensioning process;

[0046] In the fourth step, the through-hole hydraulic jack 41 pressure device is manually controlled, a part of the force is first applied, the U-shaped cable 1 is tightly attached to the steel rod joint lug plate 51, the straight cable 2 is just taut, the clamping piece 32 locks the cable, the assembly gap of the jack tensioning assembly and the UU-shaped steel rod, and the tensioning tool itself is eliminated, and the normal application of tensioning force is ensured;

[0047] In the fifth step, according to the design requirements, the oil pump pressure of the through-hole hydraulic jack 3 pressure device is continuously adjusted to apply prestress until the design requirements are met, the steel rod screw rod 52 and the locking nut 53 are manually tightened by a chain wrench, and the application of prestress is completed;

[0048] The sixth step, loosen the hydraulic jack 3 hydraulic device valve, pressure relief completely, unfasten the safety rope 8, make the U-shaped cable 1 and the steel pull rod joint ear plate 51 separate, the whole set of tensioning tool moves to the next UU type steel pull rod, repeat the above tensioning process to tension other UU type steel pull rod.

[0049] It should be noted that, in this paper, such as the first and second relationship terms are only used to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "includes", "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "includes a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0050] Finally, it should be noted that: apparently, the above examples are only examples for clearly illustrating the present application, and are not limited to the embodiments. For those skilled in the art, on the basis of the above description, other different forms of changes or variations can also be made. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the scope of the present application.

Claims

1. A simple large-diameter UU-shaped steel rod tensioning tool, characterized in that, The simple large-diameter UU steel rod tensioning tool comprises a UU steel rod, a U-shaped cable, a straight cable, a flat clamping sight assembly and a jack tensioning assembly; the U-shaped cable is arranged on the joint lug at the two ends of the UU steel rod; the two ends of the straight cable are respectively connected with one flat clamping sight assembly; the flat clamping sight assembly is connected with the end of the U-shaped cable; the joint lugs at the two ends of the UU steel rod are arranged on the same side and are arranged as a group; the U-shaped cable, the flat clamping sight assembly and the straight cable connected with the U-shaped cable are arranged in the same plane; the jack tensioning assembly is arranged on one side of the flat clamping sight assembly and is connected with the straight cable. The flat clamping sight assembly comprises a flat sight ring and a clamping piece; the end of the U-shaped cable is arranged on one side of the flat sight ring through the through hole of the flat sight ring and is clamped by the clamping piece; one end of the straight cable is arranged on the other side of the flat sight ring through the through hole of the flat sight ring and is clamped by the clamping piece; the other end of the straight cable is connected with the flat sight ring of the other flat clamping sight assembly through the jack tensioning assembly. The jack tensioning assembly comprises a through hydraulic jack, a limiting plate, a tool anchor plate and an end cover plate; the other end of the straight cable is sequentially connected with the limiting plate, the tool anchor plate and the end cover plate after passing through the flat sight ring and the through hydraulic jack; the through hydraulic jack abuts against the flat sight ring; a safety rope is arranged on the U-shaped cable; the safety rope is arranged around the joint lugs of the UU steel rod; the two U-shaped cables arranged around the two joint lugs of the UU steel rod can be fixed by the safety rope.

2. The simple large-diameter UU-shaped steel rod tensioning tooling according to claim 1, characterized in that: The joint lugs of the UU steel rod are connected with other steel structure lugs through the pin shaft assembly.

3. The simple large-diameter UU-shaped steel pull rod tensioning tool according to claim 1, characterized in that: The flat sight ring is provided with five through holes and is arranged in a row; the two ends of the U-shaped cable pass through the through holes at the two ends of the flat sight ring and are connected; the straight cable is connected after passing through the third through hole in the middle of the flat sight ring.

4. A simple large-diameter UU-shaped steel rod tensioning method, characterized in that, The simple large-diameter UU steel rod tensioning tool is applied to the steps of: Step one: assembling tools, the joint lugs at the two ends of the UU steel rod are arranged on the same side and are arranged as a group; two U-shaped cables are arranged around the joint lugs in the same group; the ends of the two U-shaped cables are connected with one flat clamping sight assembly; the two flat clamping sight assemblies are connected by the straight cable; Step two: installing a force applying machine, the jack tensioning assembly is connected with one end of the straight cable and is installed on the flat clamping sight assembly; Step three: binding a safety rope, the safety rope is bound on the side of the joint lug of the UU steel rod close to the screw rod. Step four, tensioning the UU steel rod, manually control the centering jack to apply a part of the force, pre-tensioning to eliminate the gap of the tensioning tool assembly, continue to control the jack tensioning assembly to apply the prestress until the design requirements are met, complete the tensioning, then unload, move the tensioning tool to the next UU steel rod to be tensioned; when pre-tensioning, manually control the jack tensioning assembly to apply a part of the force, so that the U-shaped cable is close to the ear plate of the steel rod joint, the linear cable is just straight, the clamp piece locks the cable, eliminates the assembly gap of the tensioning tool and the steel rod, and the tensioning tool itself, and guarantees the normal application of the tensioning force.

5. The simple large-diameter UU steel rod tensioning method according to claim 4, characterized in that: In the step one, the center axis of the same group of U-shaped cables and the center section of the thickness direction of the joint ear plate are in the same plane.

6. The simple large-diameter UU-shaped steel rod tensioning method according to claim 4, characterized in that: In the step four, during the tensioning process, the pressure of the jack tensioning assembly is manually controlled, the prestress is applied until the design requirements are met, the chain wrench is manually tightened to tighten the screw rod and the locking nut of the UU steel rod, and the application of the prestress is completed.

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