CN219045103U

CN219045103U - Construction tool for tensioning prestressed steel strand

Info

Publication number: CN219045103U
Application number: CN202223356646.2U
Authority: CN
Inventors: 刘桂芬; 周云倩; 熊新光; 于相平; 孙梦琛; 赵英楠
Original assignee: Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Current assignee: Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-05-19
Anticipated expiration: 2032-12-12

Abstract

The utility model relates to a prestressed steel strand stretch-draw construction tool, use in the field of bridge construction technique, it includes the support frame, locates backup pad and jack on the support frame, be equipped with spacing subassembly and adjusting part in the backup pad, spacing subassembly will the jack is fixed in the backup pad, adjusting part is right the angle of backup pad is adjusted. The jack adjusting device has the advantages that the jack can be fixed firstly, then the inclination angle of the jack is adjusted, and the jack inclination angle adjusting device is simple and easy to operate and high in stability.

Description

Construction tool for tensioning prestressed steel strand

Technical Field

The application relates to the technical field of bridge construction, in particular to a construction tool for tensioning a prestressed steel strand.

Background

The prestress tensioning is to add tension in advance in the component, so that the prestressed tensioning component bears compressive stress, and further causes the prestressed tensioning component to generate certain deformation to cope with loads born by the structure, including the load of the component, wind load, snow load, earthquake load and the like. Generally, steel strands, jacks, anchor plates and clamping pieces are needed for stretching.

The Chinese patent with the bulletin number of CN217870000U discloses a steel strand tensioning protection device, which comprises a jack, a supporting plate, a supporting rod with one end connected with the upper surface of the supporting plate and the other end hinged with one end of the jack, and a lifting rod with one end hinged with the upper surface of the supporting plate and the other end hinged with the other end of the jack, wherein the hinged positions of the supporting rod and the lifting rod and the jack are positioned on the middle shaft surface of the jack, and the axis of the hinged shaft is perpendicular to the middle shaft surface of the jack. The lifting jack is characterized by further comprising a sliding rail, the track direction of the sliding rail is parallel to the axis of the lifting jack, a sliding block sliding along the sliding rail is arranged at the bottom of the lifting jack, the supporting rod is hinged to the sliding rail with the lifting rod, the lifting jack is connected with a traction assembly, the traction assembly comprises a lifting rope, a supporting shaft, a roller and a rocker, the supporting shaft is supported on the supporting plate, the supporting shaft can rotate around the axis of the supporting shaft, the roller is supported on the lower portion of the supporting leg and can rotate around the axis of the supporting shaft, the rocker is centered on the axis of the roller at one end, the other end of the lifting rope is fixed on the roller and is wound on the roller, and the middle portion of the lifting rope is supported on the supporting shaft.

With respect to the related art described above, the inventors consider that the inclination angle of the slide rail and the jack is changed by adjusting the height of the lifting rod, and the jack is pulled by the lifting rope to control the sliding of the jack, and if the lifting rope is fixed in advance, it is difficult for the slide rail to drive the jack to change the inclination angle; if the lifting rope is not fixed in advance, the jack can slide on the sliding rail when the sliding rail is inclined, so that the operation of adjusting the inclination angle of the jack is complex, and the stability is low.

Disclosure of Invention

In order to solve the problems that the operation of adjusting the inclination angle of a jack is complex and the stability is low, the application provides a construction tool for tensioning a prestressed steel strand.

The application provides a prestressed steel strand tensioning construction tool adopts following technical scheme:

the utility model provides a prestressed steel strand stretch-draw construction tool, includes the support frame, locates backup pad and the jack on the support frame, be equipped with spacing subassembly and adjusting part in the backup pad, spacing subassembly will the jack is fixed in the backup pad, adjusting part is right the angle of backup pad is adjusted.

Through adopting above-mentioned technical scheme, fix the jack in the backup pad through spacing subassembly earlier, then the angle of rethread adjusting part to the backup pad is adjusted to the purpose of realizing the inclination adjustment to the jack, and is difficult for producing the displacement in the backup pad at this in-process jack, therefore whole operation process is simple and easy, and stability is higher.

Optionally, the spacing subassembly includes a pair of spacing staple bolt, be equipped with the spacing groove in the backup pad, a pair of spacing staple bolt is all partly located in the spacing groove, the jack is located a pair of between the spacing staple bolt, a pair of spacing staple bolt all through drive assembly in slide in the spacing inslot and support tightly in the jack.

Through adopting above-mentioned technical scheme, place the jack in the backup pad, a pair of spacing staple bolt supports tightly in the jack under drive assembly's drive to spacing to the jack, consequently when the backup pad changes inclination, the jack is difficult for producing the displacement in the backup pad, and stability is higher.

Optionally, be equipped with a pair of spacing bead in the backup pad, a pair of spacing bead one-to-one locates the both sides of spacing staple bolt, be equipped with the annular on the outer wall of jack, a pair of spacing bead all inlay locate in the annular and support tightly in the cell wall of annular.

Through adopting above-mentioned technical scheme, when placing the jack in the backup pad, make the annular on the jack outer wall correspond to the spacing bead in the backup pad, spacing bead inlays and locates in the annular to carry out preliminary spacing to the jack, and fix the jack in the intermediate position of spacing groove, make a pair of spacing staple bolt can support simultaneously tightly in the jack.

Optionally, the drive assembly includes driving motor, drive lead screw and a pair of driving piece, be equipped with in the backup pad with the drive groove that the spacing groove is linked together, driving motor is located in the drive groove, drive lead screw coaxial arrangement in on driving motor's the output shaft, a pair of equal threaded connection of driving piece in on the drive lead screw, a pair of the driving piece one-to-one is fixed in a pair of on the spacing staple bolt, the last corresponding pair of driving piece junction of drive lead screw the screw thread sets up in opposite.

By adopting the technical scheme, the driving motor is started, and drives the driving screw rod to rotate, and as the driving screw rod is provided with opposite threads, the pair of driving blocks can drive the pair of limiting hoops to move in the same direction or in opposite directions and abut against or loosen the jack.

Optionally, a pair of spacing staple bolt orientation one side of jack all is equipped with the buffer layer, spacing staple bolt will the buffer layer support tightly in the outer wall of jack.

Through adopting above-mentioned technical scheme, when drive assembly driven spacing staple bolt to support tight jack, the buffer layer can play certain cushioning effect to reduce the condition that the wearing and tearing damaged appears because of the rigid contact with the jack to spacing staple bolt.

Optionally, the adjusting part includes accommodate motor, adjusts worm wheel, adjusting worm and a pair of adjusting lever, a pair of adjust the pole one-to-one is located the both ends of backup pad, a pair of adjust the pole all rotate and be fixed in on the support frame, one of them adjust the pole and run through the support frame, adjust worm wheel coaxial arrangement in one of them adjust the pole and run through on the part of support frame, accommodate motor is fixed in on the support frame, adjust worm coaxial arrangement in accommodate motor's output shaft and with adjust worm wheel and mesh mutually.

By adopting the technical scheme, the adjusting motor is started, and the adjusting motor drives the adjusting worm to drive the adjusting worm wheel to rotate, so that the adjusting rod drives the whole supporting plate to rotate, thereby realizing the purpose of adjusting the inclination angle of the jack, and being simple and easy to operate.

Optionally, a mounting plate is arranged between the adjusting motor and the supporting frame, the adjusting motor is fixed on the mounting plate, and the mounting plate is fixed on the supporting frame through a mounting bolt.

Through adopting above-mentioned technical scheme, accommodate motor passes through the mounting panel to be fixed on the support frame, has promoted the stability of installation, also is convenient for accommodate motor's installation and dismantlement simultaneously.

Optionally, the regulating motor outside is equipped with the protection casing, adjust worm wheel with adjust worm also be located the protection casing, the protection casing pass through the bolt with the support frame is fixed.

Through adopting above-mentioned technical scheme, set up the protection casing in the accommodate motor outside, reducible external environment is to accommodate motor, adjust worm wheel and adjusting worm's influence, consequently accommodate motor, adjust worm wheel and adjusting worm be difficult for appearing damaging, life is longer.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the jack is fixed on the supporting plate through the limiting component, and then the angle of the supporting plate is adjusted through the adjusting component, so that the purpose of adjusting the inclination angle of the jack is achieved, and the jack is not easy to generate displacement on the supporting plate in the process, so that the whole operation process is simple, convenient and easy to implement, and the stability is high;

2. the jack is placed on the supporting plate, the pair of limiting hoops are abutted against the jack under the drive of the driving assembly so as to limit the jack, so that when the supporting plate changes the inclination angle, the jack is not easy to generate displacement on the supporting plate, and the stability is high;

3. the adjusting motor is started, the adjusting motor drives the adjusting worm to drive the adjusting worm wheel to rotate, and then the adjusting rod drives the whole supporting plate to rotate, so that the purpose of adjusting the inclination angle of the jack is achieved, and the operation is simple, convenient and easy to implement.

Drawings

FIG. 1 is a schematic illustration of a construction tool for tensioning a prestressed steel strand in an embodiment of the present application.

FIG. 2 is a partial cross-sectional view of a construction tool for tensioning a prestressed steel strand in an embodiment of the present application.

Reference numerals: 1. a support frame; 2. a support plate; 21. a limit groove; 22. a driving groove; 3. a jack; 31. a ring groove; 4. a limit component; 41. limiting hoops; 5. an adjustment assembly; 51. adjusting a motor; 52. adjusting a worm wheel; 53. adjusting a worm; 54. an adjusting rod; 6. a drive assembly; 61. a driving motor; 62. driving a screw rod; 63. a driving block; 7. a limit rib; 8. a buffer layer; 9. a mounting plate; 10. installing a bolt; 11. and a protective cover.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-2.

The embodiment of the application discloses a construction tool for tensioning a prestressed steel strand. Referring to fig. 1 and 2, the construction tool for tensioning the prestressed steel strand comprises a support frame 1, a support plate 2 and a jack 3, wherein the support plate 2 is rotatably installed on the support frame 1 through an adjusting component 5. Specifically, the adjusting assembly 5 includes an adjusting motor 51, an adjusting worm gear 52, an adjusting worm 53 and a pair of adjusting levers 54, wherein the mounting plate 9 is mounted on one side wall of the supporting frame 1 through the mounting bolt 10, the adjusting motor 51 is fixed on the mounting plate 9, the adjusting worm 53 is coaxially mounted on an output shaft of the adjusting motor 51, the pair of adjusting levers 54 are welded at two ends of the supporting plate 2 in one-to-one correspondence, one adjusting lever 54 is rotationally fixed on the supporting frame 1, the other adjusting lever 54 penetrates the supporting frame 1 and extends out of the supporting frame 1 to form a part of the supporting frame 1 to coaxially mount the adjusting worm gear 52, and the adjusting worm gear 52 is meshed with the adjusting worm 53.

Therefore, the adjusting motor 51 is started, and the adjusting motor 51 drives the adjusting worm 53 to drive the adjusting worm wheel 52 to rotate, so that the adjusting lever 54 drives the supporting plate 2 to rotate, and the inclination angle of the supporting plate 2 is adjusted.

Referring to fig. 1, in order to protect the adjusting assembly 5, the supporting frame 1 is fixed with a protecting cover 11 by bolts on the side wall where the adjusting motor 51 is located, and the protecting cover 11 covers the adjusting motor 51, the adjusting worm wheel 52 and the adjusting worm 53, so that the possibility that the adjusting motor 51, the adjusting worm wheel 52 and the adjusting worm 53 are damaged due to the influence of external environment can be reduced, and the service lives of the adjusting motor 51, the adjusting worm wheel 52 and the adjusting worm 53 can be prolonged.

Referring to fig. 1 and 2, the jack 3 is fixed to the support plate 2 by a limit assembly 4. Specifically, the limiting assembly 4 includes a pair of limiting hoops 41, the upper surface of the supporting plate 2 is provided with a limiting groove 21 along its length direction, and the pair of limiting hoops 41 are both partially located in the limiting groove 21 and slide in the limiting groove 21 through the driving assembly 6. Specifically, the driving assembly 6 includes a driving motor 61, a driving screw 62 and a pair of driving blocks 63, a driving groove 22 is disposed in the supporting plate 2 along the length direction of the driving screw 22, the driving groove 22 is communicated with the limiting groove 21, the driving motor 61, the driving screw 62 and the pair of driving blocks 63 are all located in the driving groove 22, the driving motor 61 is fixed on the bottom wall of the driving groove 22, the driving screw 62 is coaxially mounted on the output shaft of the driving motor 61, two sections of threads with opposite spiral directions are symmetrically disposed on the driving screw 62, the pair of driving blocks 63 are all in threaded connection with the driving screw 62 and correspond to the two sections of threads with opposite directions one by one, and the pair of driving blocks 63 are welded to the bottoms of the pair of limiting hoops 41 one by one.

In addition, a spacing rib 7 is welded between a pair of spacing hoops 41 on the support plate 2, and a spacing rib 7 is arranged on both sides of the pair of spacing hoops 41 on the support plate 2. The outer wall of the jack 3 is provided with a ring groove 31 along the circumferential direction, and a pair of limit ribs 7 can be adaptively embedded in the ring groove 31.

Therefore, when the jack 3 is fixed on the support plate 2, the jack 3 can be directly placed on the pair of limit ribs 7, at this time, the jack 3 is located in the middle of the pair of limit hoops 41, and the pair of limit ribs 7 are abutted against the groove walls of the annular groove 31, so that the jack 3 can be initially fixed, and the jack 3 is not easy to deviate before being limited. Then, the driving motor 61 is started, the driving motor 61 drives the driving screw rod 62 to rotate, and as the pair of driving blocks 63 are in threaded connection with two sections of threads with opposite directions on the driving screw rod 62, when the driving screw rod 62 rotates, the pair of driving blocks 63 can drive the pair of limiting hoops 41 to slide in the same or opposite directions in the limiting groove 21, so that the jack 3 is abutted or loosened. When the pair of limit hoops 41 are abutted against the jack 3, the clamping force formed by the pair of limit hoops 41 can fix the jack 3 on the support plate 2.

In summary, the jack 3 is placed on the support plate 2, and the pair of limiting hoops 41 are pressed against the jack 3 under the driving of the driving component 6, so that the jack 3 is fixed on the support plate 2. After the fixation is finished, the adjusting component 5 drives the supporting plate 2 to rotate, so that the purpose of adjusting the inclination angle of the jack 3 can be realized, and the operation is simple and easy; the jack 3 is difficult to generate displacement due to the change of the inclination angle of the supporting plate 2 under the limiting action of the pair of limiting hoops 41, and has higher stability.

Referring to fig. 1 and 2, in order to protect the limit clips 41 and the jack 3, the buffer layer 8 is adhered to one side of the limit clips 41 facing the jack 3, and the limit clips 41 abut the buffer layer 8 against the outer wall of the jack 3. In this embodiment of the application, buffer layer 8 is made by rubber material, therefore has better cushioning properties, when spacing staple bolt 41 supports tightly in jack 3, buffer layer 8 can reduce spacing staple bolt 41 and jack 3 because of the rigid contact appears wearing and tearing the circumstances of destruction to the life of extension spacing staple bolt 41 and jack 3.

The implementation principle of the construction tool for tensioning the prestressed steel strand is as follows: the jack 3 is placed on the supporting plate 2, and the pair of limiting hoops 41 are abutted against the jack 3 under the driving of the driving assembly 6, so that the jack 3 is fixed on the supporting plate 2. After the fixation is finished, the adjusting component 5 drives the supporting plate 2 to rotate, so that the purpose of adjusting the inclination angle of the jack 3 can be realized, and the operation is simple and easy; the jack 3 is difficult to generate displacement due to the change of the inclination angle of the supporting plate 2 under the limiting action of the pair of limiting hoops 41, and has higher stability.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The utility model provides a prestressed steel strand stretch-draw's construction tool, includes support frame (1), locates backup pad (2) and jack (3) on support frame (1), its characterized in that: be equipped with spacing subassembly (4) and adjusting part (5) on backup pad (2), spacing subassembly (4) will jack (3) are fixed in on backup pad (2), adjusting part (5) are right the angle of backup pad (2) is adjusted.

2. The construction tool for tensioning a prestressed steel strand according to claim 1, wherein: the limiting assembly (4) comprises a pair of limiting hoops (41), a limiting groove (21) is formed in the supporting plate (2), the limiting hoops (41) are both partially located in the limiting groove (21), the jack (3) is located between the limiting hoops (41), and the limiting hoops (41) are both slid in the limiting groove (21) and abutted against the jack (3) through the driving assembly (6).

3. The construction tool for tensioning a prestressed steel strand according to claim 2, wherein: be equipped with a pair of spacing bead (7) on backup pad (2), a pair of spacing bead (7) one-to-one locates the both sides of spacing staple bolt (41), be equipped with annular (31) on the outer wall of jack (3), a pair of spacing bead (7) all inlay locate in annular (31) and support tightly in the cell wall of annular (31).

4. The construction tool for tensioning a prestressed steel strand according to claim 2, wherein: the driving assembly (6) comprises a driving motor (61), a driving screw (62) and a pair of driving blocks (63), wherein driving grooves (22) communicated with the limiting grooves (21) are formed in the supporting plate (2), the driving motor (61) is located in the driving grooves (22), the driving screw (62) is coaxially installed on an output shaft of the driving motor (61), the driving blocks (63) are in threaded connection with the driving screw (62), the driving blocks (63) are in one-to-one correspondence with the limiting hoops (41), and threads corresponding to the connecting positions of the driving blocks (63) on the driving screw (62) are oppositely arranged.

5. The construction tool for tensioning a prestressed steel strand according to claim 2, wherein: one pair of spacing staple bolt (41) towards one side of jack (3) all is equipped with buffer layer (8), spacing staple bolt (41) will buffer layer (8) support tightly in the outer wall of jack (3).

6. The construction tool for tensioning a prestressed steel strand according to claim 1, wherein: the adjusting assembly (5) comprises an adjusting motor (51), an adjusting worm wheel (52), an adjusting worm (53) and a pair of adjusting rods (54), wherein the pair of adjusting rods (54) are arranged at two ends of the supporting plate (2) in a one-to-one correspondence mode, the pair of adjusting rods (54) are all rotationally fixed on the supporting frame (1), one adjusting rod (54) penetrates through the supporting frame (1), the adjusting worm wheel (52) is coaxially mounted on one part of the adjusting rod (54) penetrating through the supporting frame (1), the adjusting motor (51) is fixed on the supporting frame (1), and the adjusting worm (53) is coaxially mounted on an output shaft of the adjusting motor (51) and meshed with the adjusting worm wheel (52).

7. The construction tool for tensioning a prestressed steel strand according to claim 6, wherein: the adjustable hydraulic lifting device is characterized in that a mounting plate (9) is arranged between the adjusting motor (51) and the supporting frame (1), the adjusting motor (51) is fixed on the mounting plate (9), and the mounting plate (9) is fixed on the supporting frame (1) through a mounting bolt (10).

8. The construction tool for tensioning a prestressed steel strand according to claim 6, wherein: the outer side of the adjusting motor (51) is provided with a protective cover (11), the adjusting worm wheel (52) and the adjusting worm (53) are also positioned in the protective cover (11), and the protective cover (11) is fixed with the supporting frame (1) through bolts.