Device and method for reverse transport of stay cable tensioning jack in box girder

Abstract

The present invention provides a device and method for reverse transport of a cable-stayed tensioning jack in a box girder. The device at least comprises a steel box girder diaphragm, a positioning plate, a sliding track, a sliding trolley and a cable-stayed tensioning jack. The positioning plate is bolted to the steel box girder diaphragm, a positioning groove is provided below the positioning plate, the sliding track is embedded in the positioning groove, the sliding trolley is installed on the sliding track and can slide on the sliding track, a lifting hole is provided on the sliding trolley, and the cable-stayed tensioning jack is connected to the lifting hole through a lifting belt. The present invention realizes reverse transport of the jack in the steel box girder by sliding the sliding trolley on the sliding track. During reverse transport, rolling friction occurs between the sliding trolley and the sliding track, thereby improving the reverse transport efficiency of the tensioning jack in the box girder; and during reverse transport, the roller of the sliding trolley plays a lateral limiting role, thereby improving the safety of reverse transport of the tensioning jack in the box girder.

Description

Technical Field

[0001] The invention belongs to the technical field of cable-stayed bridge cable construction, and particularly relates to a device and method for reversely transporting a cable-stayed cable tensioning jack in a box beam. Background Art

[0002] During the tensioning construction of the cable-stayed bridge, a large jack is required to tension the entire cable. When the cable-stayed bridge with a central cable plane is tensioned at the beam end, the reverse operation of the tensioning jack inside the box beam is the key to ensuring the effectiveness of the tensioning construction of the cable. The traditional method of reversing the tensioning jack inside the box beam mostly uses manual reversing. The tensioning jack is often heavy and difficult to reversing manually. The existing reversing device has the problems of complex structure, poor applicability, time-consuming and relatively energy-consuming. Summary of the invention

[0003] In view of the above problems existing in the prior art, the present invention provides a device and method for reversely transporting a stay cable tensioning jack in a box girder.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A device for transporting a cable-stayed tensioning jack in a box girder, comprising at least a steel box girder diaphragm, a positioning plate, a sliding track, a sliding trolley and a cable-stayed tensioning jack, wherein the positioning plate is bolted to the steel box girder diaphragm, a positioning groove is provided below the positioning plate, the sliding track is embedded in the positioning groove, the sliding trolley is installed on the sliding track and can slide on the sliding track, a lifting hole is provided on the sliding trolley, and the cable-stayed tensioning jack is connected to the lifting hole through a lifting strap. Furthermore, a plurality of first reserved holes are provided on the positioning plate, and a plurality of second reserved holes are provided on the steel box girder diaphragm, the first reserved holes correspond to the second reserved holes one by one, and are connected by a first bolt.

[0006] Furthermore, the plurality of first reserved holes on the positioning plate are located on the same vertical line.

[0007] Furthermore, the sliding track is made of steel sections, and an upper flange is provided at one end of the sliding track, and a lower flange is provided at the other end of the sliding track; the sliding track is detachably connected to the locking plate by embedding the upper flange in the locking groove; the sliding trolley is embedded in the lower flange and can slide on the lower flange.

[0008] Furthermore, limit pins are provided at both ends of the sliding track.

[0009] Furthermore, the shape of the positioning groove is the same as the cross-section of the upper flange, and the size of the positioning groove is slightly larger than the cross-section size of the upper flange.

[0010] Furthermore, the sliding trolley includes at least four trolley rollers, two limit plates, two connecting bolts and a load-bearing plate. The two limit plates are symmetrically arranged on both sides of the lower flange in the vertical direction. The four trolley rollers are respectively connected to the limit plates, and two trolley rollers are connected to the limit plates on each side. The center lines of the two trolley rollers on the same side are located on the same horizontal line, and the two trolley rollers on the opposite side are coaxial; the two connecting bolts are arranged side by side at intervals, and each connecting bolt is passed through the lower ends of the two limit plates. The load-bearing plate is vertically sleeved on the two connecting bolts, and there is no relative rotation between the load-bearing plate and the connecting bolts.

[0011] Furthermore, two groups of first through holes are symmetrically opened at the lower ends of the two limiting plates, and a second through hole corresponding to the first through hole is set at the upper end of the load-bearing plate. After the connecting bolt passes through the first through hole and the second through hole, the load-bearing plate is fixed to the middle part of the connecting bolt through the cooperation of the nut and the limiting tube sleeved on the connecting bolt, and a hanging hole is opened in the middle part of the lower end of the load-bearing plate.

[0012] Furthermore, the trolley roller includes an inner edge running wheel and an outer edge limiting wheel, the outer edge limiting wheel is fixed to the inner side of the limiting plate, the inner edge running wheel is arranged on the inner side of the outer edge limiting wheel, and is coaxially fixed with the outer edge limiting wheel; the diameter of the outer edge limiting wheel is larger than the diameter of the inner edge running wheel, and there is no relative rotation between the outer edge limiting wheel and the inner edge running wheel.

[0013] A method for transporting a cable-stayed cable tensioning jack in a box girder, specifically comprising: when in use, the cable-stayed cable tensioning jack is rotated to a position just below a lifting hole of a sliding trolley by a hand winch, one end of a sling is connected to the cable-stayed cable tensioning jack, and the other end of the sling is connected to the lifting hole; then the sliding trolley is displaced on a sliding track, the cable-stayed cable tensioning jack is transported to a position coplanar with a next construction site, and then the cable winch is used to rotate the cable-stayed cable tensioning jack to a position to be tensioned.

[0014] Furthermore, an upper hook is provided at one end of the hand hoist, and a lower hook is provided at the other end of the hand hoist. A pre-installed load-bearing lifting lug of the box girder is provided on the cross-diaphragm of the steel box girder, and a jack lifting lug is provided on the inclined cable tensioning jack; the upper hook is connected to the pre-installed load-bearing lifting lug of the box girder, and the lower hook is connected to the jack lifting lug.

[0015] By adopting the above technical solution, the advantages of the present invention are as follows:

[0016] 1) The present invention realizes the reverse transportation of the jack in the steel box girder based on the sliding of the sliding trolley on the sliding track. During the reverse transportation, there is rolling friction between the sliding trolley and the sliding track, thereby improving the reverse transportation efficiency of the tensioning jack in the box girder.

[0017] 2) During reverse transportation, the rollers of the sliding trolley act as a lateral limiter, which improves the safety of reverse transportation of the tensioning jack inside the box girder.

[0018] 3) The device for transporting the cable-stayed tensioning jack in the box girder of the present invention is simple in structure, convenient in operation, and easy to produce and assemble, which can reduce labor intensity, improve production efficiency, and reduce production costs.

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic elevation view of the present invention;

[0022] Figure 2 It is a side schematic diagram of the present invention;

[0023] Figure 3 It is a schematic diagram of the application of the present invention;

[0024] Figure 4 It is a construction schematic diagram of embodiment 6.

[0025] Description of reference numerals:

[0026] 1. Transverse diaphragm of steel box girder; 2. Positioning plate; 3. Sliding track; 4. Sliding trolley; 5. First reserved hole; 6. Positioning groove; 7. Upper flange; 8. Lower flange; 9. Stop pin; 10. Trolley roller; 11. Stop plate; 12. Connecting bolt; 13. Load-bearing plate; 14. First bolt; 15. Lifting hole; 16. Nut; 17. Stop cylinder; 18. Cable tensioning jack; 19. Lifting belt; 20. Hand chain hoist; 21. Pre-installed load-bearing lifting lug of box girder; 22. Upper lifting hook; 23. Lower lifting hook; 24. Jack lifting lug;

[0027] 101. Inner edge walking wheel; 102. Outer edge limiting wheel. DETAILED DESCRIPTION

[0028] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0029] It should be noted that, in the present invention, the up, down, left and right in the figure are regarded as the up, down, left and right of the device for reversely transporting the cable-stayed cable tensioning jack in the box girder described in this specification.

[0030] The exemplary embodiments of the present invention are now described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0031] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0032] Embodiment 1:

[0033] This embodiment provides a device for transporting the cable-stayed tensioning jack in reverse in a box beam. Figure 1 , Figure 3 As shown, it at least includes a steel box girder cross diaphragm 1, a positioning plate 2, a sliding track 3, a sliding trolley 4 and a cable-stayed cable tensioning jack 18. The positioning plate 2 is bolted to the steel box girder cross diaphragm 1. A positioning groove 6 is provided at the bottom of the positioning plate 2. The sliding track 3 is embedded in the positioning groove 6. The sliding trolley 4 is installed on the sliding track 3 and can slide on the sliding track 3. A lifting hole 15 is provided on the sliding trolley 4. The cable-stayed cable tensioning jack 18 is connected to the lifting hole 15 through a sling 19.

[0034] Specifically, the application process of the device for reversing the stay cable tensioning jack in the box girder provided in this embodiment is as follows:

[0035] During construction, the positioning plate 2 is bolted to the reserved hole of the box beam cross diaphragm 1, and the sliding track 3 is embedded in the positioning groove 6. The size of the positioning groove 6 is slightly larger than the size of the flange 7 on the sliding track to prevent the sliding trolley 4 from making a large lateral displacement during sliding, and to enable the positioning plate 2 to be limited while bearing the load.

[0036] The present invention realizes the reverse transportation of the jack in the steel box beam by sliding the sliding trolley on the sliding track. During the reverse transportation, rolling friction occurs between the sliding trolley and the sliding track, thereby improving the reverse transportation efficiency of the tensioning jack in the box beam.

[0037] Embodiment 2:

[0038] On the basis of Example 1, further, a plurality of first reserved holes 5 are provided on the positioning plate 2, and a plurality of second reserved holes are provided on the steel box girder cross diaphragm 1, and the first reserved holes 5 correspond one-to-one to the second reserved holes and are connected by first bolts 14.

[0039] The plurality of first reserved holes 5 on the positioning plate 2 are located on the same vertical line. When the tensioning jack is reversed in the box beam, the vertical height of the slide track is adjusted by adjusting the positions of the first reserved holes 5 on the positioning plate 2 and the second reserved holes on the box beam diaphragm 1.

[0040] Embodiment three:

[0041] On the basis of Example 1, further, the sliding track 3 is processed by steel section, and an upper flange 7 is provided at one end of the sliding track 3, and a lower flange 8 is provided at the other end of the sliding track 3; the sliding track 3 is detachably connected to the locking plate 2 by being embedded in the locking groove 6 through the upper flange 7; the sliding trolley 4 is embedded in the lower flange 8 and can move freely longitudinally on the lower flange 8.

[0042] Specifically, the application process of the device for reversely transporting the stay cable tensioning jack in the box girder provided in this embodiment is as follows:

[0043] During construction, the inclined cable tensioning jack 18 is rotated to a position directly below the lifting hole 15 of the sliding trolley 4 by means of the hand winch 20, one end of the sling 19 is connected to the inclined cable tensioning jack 18, and the other end of the sling 19 is connected to the lifting hole 15; then the sliding trolley 4 is displaced on the sliding track 3, and the inclined cable tensioning jack 18 is transported to a position coplanar with the next construction site, and then the hand winch 20 is used to rotate the inclined cable tensioning jack 18 to the position to be tensioned.

[0044] Embodiment 4:

[0045] On the basis of Example 3, further, limit pins 9 are provided at both ends of the sliding track 3.

[0046] like Figure 2 As shown, the limit pins 9 are located at both ends of the slide track 3. When in use, the limit pin 9 at one end of the slide track 3 is pulled out, the slide trolley 4 is embedded on the slide track 3 from the end where the limit pin 9 is pulled out, and then the limit pin 9 is inserted to prevent the slide trolley 4 from leaving the slide track 3 during operation.

[0047] Embodiment five:

[0048] On the basis of Example 3, Figure 1As shown, the sliding trolley 4 includes at least four trolley rollers 10, two limit plates 11, two connecting bolts 12 and a load-bearing plate 13. The two limit plates 11 are symmetrically arranged on both sides of the lower flange 8 in the vertical direction. The four trolley rollers 10 are respectively connected to the limit plates 11, and two trolley rollers 10 are connected to the limit plates 11 on each side. The center lines of the two trolley rollers 10 on the same side are located on the same horizontal line, and the two trolley rollers 10 on the opposite side are coaxial; the two connecting bolts 12 are arranged side by side at intervals, and each connecting bolt 12 is penetrated at the lower ends of the two limit plates 11, and the load-bearing plate 13 is vertically sleeved on the two connecting bolts 12, and there is no relative rotation between the load-bearing plate 13 and the connecting bolts 12.

[0049] Specifically, two groups of first through holes are symmetrically opened at the lower ends of the two limiting plates 11, and a second through hole corresponding to the first through hole is set at the upper end of the load-bearing plate 13. After the connecting bolt 12 passes through the first through hole and the second through hole, the load-bearing plate 13 is fixed to the middle part of the connecting bolt 12 through the cooperation of the nut 16 and the limiting tube 17 sleeved on the connecting bolt 12, and a hanging hole 15 is opened in the middle part of the lower end of the load-bearing plate 13.

[0050] Furthermore, the four trolley rollers 10 are bolted to the limit plate 11 by the second bolt, the third bolt, the fourth bolt and the fifth bolt respectively, and there is no relative rotation between the second bolt, the third bolt, the fourth bolt and the fifth bolt.

[0051] It is worth noting that the trolley roller 10 includes an inner edge running wheel 101 and an outer edge limiting wheel 102, the outer edge limiting wheel 102 is fixed to the inner side of the limiting plate 11, the inner edge running wheel 101 is arranged on the inner side of the outer edge limiting wheel 102, and is coaxially fixed with the outer edge limiting wheel 102, and there is no relative rotation between the outer edge limiting wheel 102 and the inner edge running wheel 101.

[0052] Furthermore, the diameter of the outer edge limiting wheel 102 is larger than the diameter of the inner edge walking wheel 101, and the spacing between the opposite sides of the roller outer edge limiting wheel 102 is slightly larger than the cross-sectional size of the lower flange 8 of the sliding track 3, so that the sliding trolley 4 can limit itself while walking, ensuring its walking stability.

[0053] Furthermore, the four inner edge running wheels 101 and the four outer edge limiting wheels 102 of the sliding trolley 4 are coaxial with the second bolt, the third bolt, the fourth bolt and the fifth bolt.

[0054] Embodiment six:

[0055] This embodiment provides a method for reversely transporting the cable-stayed tensioning jack in a box beam, specifically: Figure 3 , Figure 4As shown, when in use, the inclined cable tensioning jack 18 is rotated to a position directly below the lifting hole 15 of the sliding trolley 4 by the hand winch 20, one end of the sling 19 is connected to the inclined cable tensioning jack 18, and the other end of the sling 19 is connected to the lifting hole 15; then the sliding trolley 4 is displaced on the sliding track 3, and the inclined cable tensioning jack 18 is transported to a position coplanar with the next construction site, and then the hand winch 20 is used to rotate the inclined cable tensioning jack 18 to the position to be tensioned.

[0056] An upper hook 22 is provided at one end of the hand chain hoist 20, and a lower hook 23 is provided at the other end of the hand chain hoist 20. A pre-installed bearing lug 21 of the box girder is provided on the steel box girder diaphragm 1, and a jack lug 24 is provided on the inclined cable tensioning jack 18; the upper hook 22 is connected to the pre-installed bearing lug 21 of the box girder, and the lower hook 23 is connected to the jack lug 24. With the cooperation of the hand chain hoist 20, the inclined cable tensioning jack 18 is slowly withdrawn, and then the hand chain hoist 20 is used to swing the inclined cable tensioning jack to the right below the sliding trolley 4, and the inclined cable tensioning jack 18 is connected to the lifting hole 15 of the sliding trolley with a sling 19, and then the hand chain hoist 20 is used to cooperate with manual traction to move the sliding trolley 4 forward.

[0057] In summary, the present invention realizes the reverse transportation of the cable-stayed tensioning jack in the box girder through the sliding track and the sliding trolley, changes the position of the cable-stayed tensioning jack 18 in space through the mutual cooperation between the hand chain hoists 20, and drives the cable-stayed tensioning jack 18 to move on the sliding track 3 through the sliding trolley 4, thereby improving the reverse transportation efficiency of the cable-stayed tensioning jack 18 in the box girder. The device has a simple structure, low processing cost, convenient installation and use, is easy to operate manually, has high reverse transportation efficiency, and is highly applicable, which well meets the current operation requirements.

[0058] The parts not specifically described in the above embodiments belong to well-known components and common structures or common means in the technical field, and will not be described in detail here.

[0059] In the absence of conflicts, those skilled in the art can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one. The present invention will not be limited to the embodiments shown herein, but shall conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for transporting a stay cable tensioning jack in a box girder, characterized in that: A device for transporting a cable-stayed tensioning jack in a box girder, the device comprising at least a steel box girder transverse diaphragm (1), a positioning plate (2), a sliding track (3), a sliding trolley (4), a cable-stayed tensioning jack (18) and a hand chain hoist (20), wherein the positioning plate (2) is bolted to the steel box girder transverse diaphragm (1), a positioning groove (6) is provided below the positioning plate (2), the sliding track (3) is embedded in the positioning groove (6), the sliding trolley (4) is mounted on the sliding track (3) and can slide on the sliding track (3), a lifting hole (15) is provided on the sliding trolley (4), and the cable-stayed tensioning jack (18) is connected to the lifting hole (15) via a lifting belt (19); An upper hook (22) is provided at one end of the hand chain hoist (20), and a lower hook (23) is provided at the other end of the hand chain hoist (20); a box girder pre-installed load-bearing lifting lug (21) is provided on the steel box girder diaphragm (1), and a jack lifting lug (24) is provided on the inclined cable tensioning jack (18); the upper hook (22) is connected to the box girder pre-installed load-bearing lifting lug (21), and the lower hook (23) is connected to the jack lifting lug (24); The method for transporting the cable-stayed tensioning jack in a box girder specifically comprises: when in use, the cable-stayed tensioning jack (18) is rotated to a position directly below the lifting hole (15) of the sliding trolley (4) by means of a hand winch (20), one end of a sling (19) is connected to the cable-stayed tensioning jack (18), and the other end of the sling (19) is connected to the lifting hole (15); then the sliding trolley (4) is displaced on the sliding track (3), the cable-stayed tensioning jack (18) is transported to a position coplanar with the next construction site, and then the cable-stayed tensioning jack (18) is rotated to a position to be tensioned by means of a hand winch (20).

2. The method for transporting the cable-stayed cable tensioning jack in a box beam according to claim 1, characterized in that: The positioning plate (2) is provided with a plurality of first reserved holes (5), and the steel box beam diaphragm (1) is provided with a plurality of second reserved holes, the first reserved holes (5) corresponding to the second reserved holes one by one, and connected by first bolts (14).

3. The method for transporting the cable-stayed cable tensioning jack in a box beam according to claim 2, characterized in that: The plurality of first reserved holes (5) on the positioning plate (2) are located on the same vertical straight line.

4. The method for transporting the cable-stayed cable tensioning jack in a box beam according to claim 1, characterized in that: The slide track (3) is made of steel, and an upper flange (7) is provided at one end of the slide track (3), and a lower flange (8) is provided at the other end of the slide track (3); the slide track (3) is detachably connected to the locking plate (2) by the upper flange (7) being embedded in the locking groove (6); the slide trolley (4) is embedded in the lower flange (8) and can slide on the lower flange (8).

5. The method for transporting the cable-stayed cable tensioning jack in a box beam according to claim 1, characterized in that: Limit pins (9) are provided at both ends of the sliding track (3).

6. The method for transporting the cable-stayed cable tensioning jack in reverse in a box beam according to claim 4, characterized in that: The sliding trolley (4) comprises at least four trolley rollers (10), two limit plates (11), two connecting bolts (12) and a bearing plate (13). The two limit plates (11) are symmetrically arranged on both sides of the lower flange (8) in the vertical direction. The four trolley rollers (10) are respectively connected to the limit plates (11), and two trolley rollers (10) are connected to each limit plate (11). The center lines of the two trolley rollers (10) on the same side are located on the same horizontal line, and the two trolley rollers (10) on the opposite side are coaxial. The two connecting bolts (12) are arranged side by side at intervals, and each connecting bolt (12) is penetrated at the lower ends of the two limit plates (11). The bearing plate (13) is vertically sleeved on the two connecting bolts (12), and there is no relative rotation between the bearing plate (13) and the connecting bolts (12).

7. The method for transporting the cable-stayed cable tensioning jack in reverse in a box beam according to claim 6, characterized in that: Two groups of first through holes are symmetrically formed at the lower ends of the two limit plates (11), and a second through hole corresponding to the first through hole is formed at the upper end of the load-bearing plate (13). After the connecting bolt (12) passes through the first through hole and the second through hole, the load-bearing plate (13) is fixed to the middle part of the connecting bolt (12) through the cooperation of a nut (16) and a limit tube (17) sleeved on the connecting bolt (12), and a hanging hole (15) is formed at the middle part of the lower end of the load-bearing plate (13).

8. The method for transporting the cable-stayed cable tensioning jack in reverse in a box beam according to claim 6, characterized in that: The trolley roller (10) comprises an inner edge running wheel (101) and an outer edge limiting wheel (102); the outer edge limiting wheel (102) is fixed to the inner side of the limiting plate (11); the inner edge running wheel (101) is arranged on the inner side of the outer edge limiting wheel (102) and is coaxially fixedly connected to the outer edge limiting wheel (102); the diameter of the outer edge limiting wheel (102) is greater than the diameter of the inner edge running wheel (101), and there is no relative rotation between the outer edge limiting wheel (102) and the inner edge running wheel (101).

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