Lifting device for prefabricated box girder of viaduct

Abstract

The invention relates to the field of box girder hoisting, in particular to a hoisting device for a prefabricated box girder of a viaduct, the lower end of a traction rope is fixedly connected with a supporting table, a jacking mechanism is arranged on the top surface of the supporting table, and the output end of the jacking mechanism is fixedly connected with a supporting block; pull ropes are fixedly connected to the four portions of the supporting block and penetrate through the supporting table, and the left side and the right side of the bottom face of the supporting table are each provided with a set of lifting ropes; a transverse positioning device is clamped to the upper end of the middle of the prefabricated box girder, and longitudinal positioning devices are fixedly connected to the left and right sides of the prefabricated box girder; the two groups of lifting ropes are connected to the left part and the right part of the prefabricated box girder in a winding manner; the ends of the front pull rope and the rear pull rope are connected to the two push plate control mechanisms respectively. The ends of the left pull rope and the right pull rope are connected with the hydraulic control mechanisms on the two sides respectively. The left side and the right side of the pile body are positioned and limited by the prefabricated box girders through the transverse positioning devices, the distance between the prefabricated box girders is positioned and limited through the longitudinal positioning devices, and the adjustment difficulty of small deviation during hoisting of the prefabricated box girders is reduced.

Description

Technical Field

[0001] The invention relates to the field of box girder hoisting, and more specifically to a hoisting device for a prefabricated box girder of a viaduct. Background Art

[0002] A box girder is a type of beam used in bridge engineering. It is hollow inside and has flanges on both sides of the upper part. Box girders with reinforced concrete structures are divided into prefabricated box girders and cast-in-place box girders. Box girders prefabricated in an independent site can be erected in conjunction with a bridge-erecting machine after the lower project is completed, which can speed up the project progress and save construction time.

[0003] Prefabricated box girders are often used in the laying of viaducts. Cranes need to lift the prefabricated box girders to the designated position. During the descent of the prefabricated box girders, small deviations are prone to occur. Such small deviations are not easy to correct by adjusting the crane, which results in a long time spent on deviation correction, resulting in reduced work efficiency. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a hoisting device for prefabricated box girders of viaducts, which can realize the positioning and limitation of the left and right sides of the pile body by the transverse positioning device, and the positioning and limitation of the distance between the prefabricated box girders by the longitudinal positioning device, thereby reducing the difficulty of adjusting small deviations when hoisting the prefabricated box girders and improving work efficiency.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A lifting device for a prefabricated box girder of an elevated bridge comprises a traction rope, the upper end of which is fixedly connected to a lifting ring, the lower end of which is fixedly connected to a support platform, a jacking mechanism is arranged on the top surface of the support platform, the output end of the jacking mechanism is fixedly connected to a support block, and the traction rope passes through the support block; the front, rear, left and right parts of the support block are all fixedly connected to pull ropes, four pull ropes pass through the support platform, and a group of lifting ropes is respectively arranged on the left and right sides of the bottom surface of the support platform; a transverse positioning device is clamped on the upper end of the middle part of the prefabricated box girder, and the left and right sides of the prefabricated box girder are fixedly connected to longitudinal positioning devices; two groups of lifting ropes are wound and connected to the left and right parts of the prefabricated box girder; the front part of the transverse positioning device is connected to the front part of the transverse positioning device. A push plate control mechanism is provided at each of the rear two ends, and a push plate is slidably connected to the push plate control mechanism, and the ends of the front and rear pull ropes are respectively connected to the two push plate control mechanisms; a hydraulic control mechanism is provided on the longitudinal positioning device, and a column block is slidably connected in the hydraulic control mechanism, and the ends of the left and right pull ropes are respectively connected to the hydraulic control mechanisms on both sides; when the jacking mechanism is output, the pull rope is pulled up by the support block, and the front and rear pull ropes drive the push plates to move toward each other through the push plate control mechanism until they are clamped on the front and rear sides of the pile body, and the left and right pull ropes drive the two column blocks to move away from each other through the hydraulic control mechanism and are clamped on the sides of the prefabricated box girders on the adjacent two sides.

[0007] Furthermore, a connecting rope is provided in the middle of the bottom surface of the support platform, and the lower end of the connecting rope is fixedly connected to a rope dividing bracket; a plurality of rope dividing points are provided on the rope dividing bracket, and pulleys are provided at the rope dividing points. The pull rope passes around the pulleys at the corresponding positions and is connected to the hydraulic control mechanism, and the lifting rope passes around the pulleys at the corresponding positions and is connected to the push plate control mechanism, so that the pull rope and the lifting rope are not easily entangled.

[0008] Furthermore, the transverse positioning device includes a U-shaped frame, and the left and right vertical arms of the U-shaped frame are slidably connected to a plug plate for supporting the prefabricated box beam, and the plug plate is arranged horizontally; the lower ends of the two vertical arms are provided with a rectangular groove (603), and the rectangular groove opens downward; the push plate control mechanism includes a rectangular plate slidably connected in the rectangular groove, and a first compression spring is also arranged in the rectangular groove, the upper end of the first compression spring is connected to the top surface of the rectangular groove, and the lower end abuts against the upper end of the rectangular plate, and the lower end of the rectangular plate is fixedly connected to a rectangular block, which is arranged horizontally, and the rectangular block is provided with a strip groove and a U-shaped groove, the strip groove opening is arranged inwardly, one end of the U-shaped groove is connected to the strip groove, and the other end opens outwardly; a push plate is slidably connected to the middle part of the strip groove, and a nylon rope is arranged in the U-shaped groove, one end of the nylon rope is fixedly connected to the push plate, and the other end is fixedly connected to a T-shaped rod; the ends of the front and rear pull ropes are respectively connected to the T-shaped rods of the two push plate control mechanisms; so that a small deviation of the front and rear positions of the prefabricated box beam can be quickly adjusted.

[0009] Furthermore, a rectangular protrusion is provided on the upper end of the rectangular plate, and a strip protrusion is provided on the lower end of the push plate away from the pad, so that the rectangular plate is not easy to fall out of the middle of the rectangular groove, and the push plate is not easy to fall out of the middle of the slide groove.

[0010] Furthermore, a pad is fixedly connected to the end of the push plate, and the pad and the push plate are arranged in a T shape.

[0011] Furthermore, the longitudinal positioning device includes a cylindrical shell detachably connected to the side of the prefabricated box beam, the cylindrical shell is openly arranged away from the side of the prefabricated box beam, a second compression spring is arranged in the cylindrical shell, a cylindrical block is slidably connected in the cylindrical shell, and an end of the cylindrical block close to the second compression spring is fixedly connected to a rubber plug; the cylindrical block and the rubber plug are both slidably and sealedly connected to the cylindrical shell, and a liquid filling cavity is formed between the cylindrical shell, the cylindrical block and the rubber plug; the hydraulic control mechanism includes a liquid passing pipe connected to the liquid filling cavity, a liquid storage tank connected to the liquid passing pipe is fixedly connected to the upper end of the liquid passing pipe, a liquid blocking block is slidably and sealedly connected to the middle of the liquid storage tank, and a block is clamped at the end of the liquid storage tank away from the liquid passing pipe; when the block is inserted into the liquid storage tank, the second compression spring is compressed, and the cylindrical block shrinks in the cylindrical shell.

[0012] Furthermore, the filling cavity is filled with hydraulic oil, and the viscosity of the hydraulic oil is between 3200-3800CP, so that the flow rate of the hydraulic oil through the liquid pipe is slow, thereby making the movement speed of the column block lower, avoiding instability caused by excessive movement of the prefabricated box girder.

[0013] Furthermore, a connecting ear is provided on the columnar shell, and the columnar shell is detachably connected to the side of the prefabricated box beam through the connecting ear, so that the disassembly and connection are convenient.

[0014] Furthermore, the aperture of the liquid passage is less than two millimeters, so that the liquid passage can reduce the flow rate of the hydraulic oil passing through, and the rubber plug can block the middle of the cylindrical shell.

[0015] Furthermore, the liquid blocking block is made of waterproof rubber, so that the hydraulic oil can flow from the shell into the liquid storage tank through the liquid pipe, and the liquid blocking block can prevent the hydraulic oil from leaking. Beneficial Effects

[0016] Compared with the prior art, the advantages of the present invention are: (1) This scheme uses a transverse positioning device to position and limit the left and right sides of the pile body by the prefabricated box girder, and a longitudinal positioning device to position and limit the distance between the prefabricated box girders, thereby reducing the difficulty of adjusting small deviations during the hoisting of the prefabricated box girder and improving work efficiency.

[0017] (2) The transverse positioning device enables quick adjustment of small left and right deviations of the prefabricated box girder, and the longitudinal positioning device enables quick adjustment of small front and rear deviations of the prefabricated box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the hoisting device for the prefabricated box girder of the viaduct in the present invention; Figure 2 It is a schematic diagram of the connection structure of the viaduct prefabricated box girder hoisting device of the present invention; Figure 3 It is a structural schematic diagram of the rope splitting bracket of the present invention; Figure 4 It is a structural schematic diagram of the lateral positioning device of the present invention; Figure 5 It is a schematic diagram of a half-section structure of the lateral positioning device of the present invention; Figure 6 for Figure 5 A schematic diagram of the enlarged structure at A in the middle; Figure 7 It is a structural schematic diagram of the longitudinal positioning device of the present invention; Figure 8 It is a partial half-section structural schematic diagram of the longitudinal positioning device of the present invention; Fig. 9 It is a state diagram of the viaduct prefabricated box girder hoisting device during hoisting in the present invention; Fig.10 It is a state diagram of another viaduct prefabricated box girder hoisting device during hoisting in the present invention; Fig.11 for Fig.10 A schematic diagram of the enlarged structure at B in the middle; Fig.12 It is a schematic diagram of the working principle of the longitudinal positioning device of the present invention; Fig.13 It is a side view structural schematic diagram of the viaduct prefabricated box girder hoisting device of the present invention during hoisting; Fig.14 for Fig.13 Schematic diagram of the enlarged structure at C in the middle; Fig.15 It is a schematic diagram of the working principle of the lateral positioning device of the present invention.

[0019] Description of the numbers in the figure: 1. Traction rope; 2. Lifting ring; 3. Support platform; 4. Rope distribution bracket; 5. Prefabricated box beam; 6. Horizontal positioning device; 601. U-shaped frame; 602. Insert plate; 603. Rectangular groove; 604. First compression spring; 605. Rectangular plate; 606. Rectangular block; 607. Push plate; 608. Pad; 609. Nylon rope; 610. T-bar; 7. Longitudinal positioning device; 701. Columnar shell; 702. Second compression spring; 703. Columnar block; 704. Rubber plug; 705. Liquid pipe; 706. Liquid storage tank; 707. Liquid blocking block; 708. Stopper; 8. Electric push rod; 9. Support block; 10. Pull rope; 11. Lifting rope; 12. Connecting rope; 13. Roadbed; 14. Pile body. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of the adapter model component. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See also Figure 1-15 , a lifting device for a prefabricated box girder of an elevated bridge, a lifting device for a prefabricated box girder of an elevated bridge, comprising a traction rope 1, the upper end of the traction rope 1 is fixedly connected to a lifting ring 2, the lower end of the traction rope 1 is fixedly connected to a support platform 3, a jacking mechanism is arranged on the top surface of the support platform 3, and a support block 9 is fixedly connected to the output end of the jacking mechanism; in this embodiment, the jacking mechanism can adopt a jacking device that can be thought of by technical personnel in the field of electric push rods, cylinders, etc. When an electric push rod is adopted, four are arranged, which are respectively arranged at the four corners of the top surface of the support platform 3; a first through hole is arranged at the center of the support block 9, and the traction rope 1 passes through the support block 9 through the first through hole; the support block 9 is fixedly connected with a pull rope 10 at the front, rear, left and right parts, and a second through hole is arranged on the support platform 3 corresponding to the pull rope 10, and the four pull ropes 10 pass through the support platform 3 through the corresponding second through holes, and a group of lifting ropes 11 are arranged on the left and right sides of the bottom surface of the support platform 3, one There can be 1 or 2 groups. When there is 1 lifting rope 11, the lifting rope 11 is U-shaped, and the two ends are connected to the bottom surface of the support platform 3 at intervals. When there are 2 lifting ropes 11, the upper ends of the two lifting ropes 11 are connected to the bottom surface of the support platform 3 at intervals, and the lower ends are manually tied; a transverse positioning device 6 is clamped at the upper end of the middle part of the prefabricated box girder 5, and the left and right sides of the prefabricated box girder 5 are fixedly connected with longitudinal positioning devices 7; two groups of lifting ropes 11 are wrapped and connected to the left and right parts of the prefabricated box girder 5 to lift the prefabricated box girder 5; a push plate control mechanism is respectively provided at the front and rear ends of the transverse positioning device 6, and a push plate 607 is slidably connected to the push plate control mechanism, and the ends of the front and rear two pull ropes 10 are respectively connected to the two push plate control mechanisms; a hydraulic control mechanism is provided on the longitudinal positioning device 7, and a columnar block 703 is slidably connected in the hydraulic control mechanism, and the ends of the left and right pull ropes 10 are respectively connected to the hydraulic control mechanisms on both sides.

[0024] When in use, the jacking mechanism outputs and drives the pull rope 10 to pull up through the support block 9. The front and rear pull ropes 10 drive the push plate 607 to move toward each other through the push plate control mechanism until they are clamped on the front and rear sides of the pile body 14. The left and right pull ropes 10 drive the two column blocks 703 to move away from each other through the hydraulic control mechanism and are clamped on the sides of the prefabricated box girders 5 on the adjacent two sides.

[0025] See also Figure 3A connecting rope 12 is provided in the middle of the bottom surface of the support platform 3, and the lower end of the connecting rope 12 is fixedly connected to the rope dividing bracket 4; in this embodiment, at least 6 rope dividing points are provided on the rope dividing bracket 4, and pulleys are rotatably connected at the rope dividing points. The pull rope 10 bypasses the pulleys at the corresponding positions and is connected to the hydraulic control mechanism, and the suspension rope 11 bypasses the pulleys at the corresponding positions and is connected to the push plate control mechanism; so that the pull rope 10 and the suspension rope 11 are not easy to get entangled.

[0026] See also Figure 4-6 The lateral positioning device 6 includes a U-shaped frame 601, and the left and right vertical arms of the U-shaped frame 601 are slidably connected to the plug plates 602 used to support the prefabricated box beam 5, and the plug plates 602 are arranged horizontally; the lower ends of the two vertical arms are provided with rectangular grooves 603, and the rectangular grooves 603 open downward. The push plate control mechanism includes a rectangular plate 605 slidably connected to the rectangular groove 603, and a first compression spring 604 is also arranged in the rectangular groove 603. The upper end of the first compression spring 604 is connected to the top surface of the rectangular groove 603, and the lower end abuts against the upper end of the rectangular plate 605. The lower end of the rectangular plate 605 is fixedly connected to a rectangular block 606, and the rectangular block 6 06 is horizontally arranged, and a strip groove and a U-shaped groove are provided on the rectangular block 606. The strip groove is opened inward (on the opposite side of the two rectangular blocks 606), one end of the U-shaped groove is connected to the strip groove, and the other end is opened outward (on the opposite side of the two rectangular blocks 606); a push plate 607 is slidably connected to the middle of the strip groove, and a nylon rope 609 is arranged in the U-shaped groove. One end of the nylon rope 609 is fixedly connected to the push plate 607, and the other end is fixedly connected to the end of the horizontal rod of the T-shaped rod 610, and the vertical rod of the T-shaped rod 610 is used for limiting; the ends of the front and rear pull ropes 10 are respectively connected to the T-shaped rods 610 of the two push plate control mechanisms. A pad 608 is fixedly connected to the end of the push plate 607, and the pad 608 and the push plate 607 are arranged in a T shape.

[0027] See also Fig.15 The working principle of the transverse positioning device 6 is that the pull rope 10 pulls the T-shaped rod 610 to pull the nylon rope 609 out of the U-shaped groove. At the same time, the nylon rope 609 pulls the push plate 607 to make the push plate 607 slide along the strip groove to the opposite side of the two rectangular blocks 606, slide out of the strip groove, and be clamped on the pile body 14. The prefabricated box girder 5 is limited to the center line position of the pile body 14 through the transverse positioning device 6.

[0028] As a preferred embodiment, a plurality of insertion holes are arranged at intervals on the left and right vertical arms of the U-shaped frame 601, and the insertion holes at appropriate positions can be selected according to the thickness of the prefabricated box beam to insert the plug plate 602; at the same time, a limiting protrusion is arranged at the outer end of the plug plate 602 to limit the position and prevent slipping. A rectangular protrusion is arranged at the upper end of the rectangular plate 605, so that the rectangular plate 605 is not easy to fall out of the middle of the rectangular groove 603; and a first strip protrusion is arranged on the side of the lower end of the push plate 607 away from the pad 608, and a second strip protrusion is arranged at the opening of the strip groove corresponding to the first strip protrusion, so that the push plate 607 is not easy to fall out of the strip groove.

[0029] See also Figure 7 , 8 12. The longitudinal positioning device 7 comprises a columnar shell 701 detachably connected to the side of the prefabricated box beam 5. The columnar shell 701 is openly arranged away from the side of the prefabricated box beam 5. A second compression spring 702 is arranged in the columnar shell 701. A columnar block 703 is slidably connected to the columnar shell 701. A rubber plug 704 is fixedly connected to one end of the columnar block 703 close to the second compression spring 702. The columnar block 703 and the rubber plug 704 are both slidably and sealingly connected to the columnar shell 701. The columnar shell 702 is provided with a second compression spring 702. 1. A liquid filling cavity is formed between the columnar block 703 and the rubber plug (704); the liquid filling cavity is filled with hydraulic oil, and the hydraulic control mechanism includes a liquid passing pipe 705 connected to the liquid filling cavity, the upper end of the liquid passing pipe 705 is fixedly connected to a liquid storage tank 706 connected to the liquid passing pipe 705, the middle part of the liquid storage tank 706 is slidably sealed and connected to a liquid blocking block 707, and the end of the liquid storage tank 706 away from the liquid passing pipe 705 is clamped with a stopper 708; in this embodiment, the viscosity of the hydraulic oil is between 3200-3800CP.

[0030] When in use, in the initial state, the block 708 is inserted into the liquid storage bin 706, and the pressure of the hydraulic oil on the rubber plug 704 compresses the second compression spring 702, and the column block 703 shrinks in the column shell 701. When the crane controls the hoisting device to lower the prefabricated box beam 5 to the preset position, the pull ropes 10 located on the left and right sides of the prefabricated box beam 5 pull the block 708 out of the liquid storage bin 706, and the rubber plug 704 drives the column block 703 to extend from the shell 701 under the action of the second compression spring 702. During the movement, the rubber plug 704 squeezes the hydraulic oil into the liquid storage bin 706 through the liquid pipe 705. Due to the viscosity, the hydraulic oil slowly passes through the liquid pipe 705, so the column block 703 slowly extends from the shell 701, and the ends of the two column blocks 703 away from the prefabricated box beam 5 respectively abut against the sides of the adjacent prefabricated box beam 5, so that the longitudinal positioning device 7 limits the prefabricated box beam 5 to a suitable position.

[0031] This embodiment provides a writable connection method between the columnar shell 701 and the prefabricated box girder 5. Specifically, the columnar shell 701 is provided with a connecting ear, and the columnar shell 701 is detachably connected to the side of the prefabricated box girder 5 through the connecting ear and connecting bolts.

[0032] The aperture of the liquid pipe 705 is less than two millimeters, so that the liquid pipe 705 can reduce the flow rate of the hydraulic oil passing therethrough, thereby reducing the movement speed of the columnar block 703 and preventing the prefabricated box beam 5 from shaking.

[0033] like Fig. 9 , 10The pile body 14 is fixedly connected to the upper end of the roadbed 13. During hoisting, the two hoisting ropes 11 are wound around the two sides of the prefabricated box girder 5, and the two longitudinal positioning devices 7 are respectively installed on the left and right sides of the prefabricated box girder 5 through connecting bolts, and then the transverse positioning device 7 is placed on the upper middle side of the prefabricated box girder 5, and the two plug plates 602 are inserted into the U-shaped frame 601, so that the transverse positioning device 7 is fixed on the upper middle side of the prefabricated box girder 5, and the crane hook is connected to the lifting ring 2 to start the hoisting work.

[0034] The crane lifts the prefabricated box beam 5, and the rectangular plate 605 moves downward under the action of the first compression spring 604. The downward movement of the rectangular plate 605 drives the pad 608 to move to a position below the lowest horizontal line of the prefabricated box beam 5. The crane lifts the prefabricated box beam 5 to a certain height on the upper side of the pile body 14. At this time, the pad 608 is lower than the highest horizontal line of the pile body 14. At the same time, the prefabricated box beam 5 is located between the two prefabricated box beams 5 that have been lifted. The four electric push rods 8 extend, and the electric push rods 8 drive the support block 9 to rise. During the rising process of the support block 9, the pull rope 10 is pulled; the pull rope 10 located on the front and rear sides of the prefabricated box beam 5 pulls the T-shaped rod 610 to move, and the T-shaped rod 610 drives the push plate 607 to extend from the strip groove through the nylon rope 609, and the two push plates 607 drive the pad 608 to The two sides of the pile body 14 move, and the two pads 608 contact the two sides of the pile body 14, and the prefabricated box beam 5 is limited to the midline position of the pile body 14 through the transverse positioning device 6; the pull ropes 10 located on the left and right sides of the prefabricated box beam 5 pull the block 708 out of the liquid storage bin 706, and under the action of the second compression spring 702, the rubber plug 704 drives the column block 703 to extend from the column shell 701. During the movement, the rubber plug 704 squeezes the hydraulic oil into the liquid storage bin 706 through the liquid pipe 705. Due to the viscosity, the hydraulic oil slowly passes through the liquid pipe 705, so the column block 703 slowly extends from the column shell 701, and the ends of the two column blocks 703 away from the prefabricated box beam 5 respectively press against the adjacent side of the prefabricated box beam 5, so that the longitudinal positioning device 7 limits the prefabricated box beam 5 to a suitable position. The crane is controlled to continue to descend the prefabricated box beam 5, so that the prefabricated box beam 5 is hoisted at a designated position on the upper side of the pile body 14.

[0035] The device uses the lateral positioning device 6 to position and limit the left and right sides of the pile body 14 of the prefabricated box beam 5, and the longitudinal positioning device 6 to position and limit the distance between the prefabricated box beams 5, thereby reducing the difficulty of adjusting small deviations when hoisting the prefabricated box beam 5 and improving work efficiency.

[0036] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hoisting device for a prefabricated box girder of an elevated bridge, comprising a traction rope (1), the upper end of the traction rope (1) being fixedly connected to a hoisting ring (2), characterized in that: The lower end of the traction rope (1) is fixedly connected to a support platform (3), a jacking mechanism is arranged on the top surface of the support platform (3), the output end of the jacking mechanism is fixedly connected to a support block (9), and the traction rope (1) is arranged through the support block (9); the front, rear, left and right parts of the support block (9) are all fixedly connected to pull ropes (10), the four pull ropes (10) are arranged through the support platform (3), and a group of suspension ropes (11) are respectively arranged on the left and right sides of the bottom surface of the support platform (3); a transverse positioning device (6) is clamped on the upper end of the middle part of the prefabricated box beam (5), and the left and right sides of the prefabricated box beam (5) are fixedly connected to longitudinal positioning devices (7); Two sets of suspension ropes (11) are wound and connected to the left and right parts of the prefabricated box beam (5); a push plate control mechanism is provided at each of the front and rear ends of the transverse positioning device (6), a push plate (607) is slidably connected to the push plate control mechanism, and the ends of the front and rear two pull ropes (10) are respectively connected to the two push plate control mechanisms; A hydraulic control mechanism is provided on the longitudinal positioning device (7), a columnar block (703) is slidably connected to the hydraulic control mechanism, and ends of the left and right pull ropes (10) are respectively connected to the hydraulic control mechanisms on both sides; When the jacking mechanism is output, the pull rope (10) is pulled upward by the support block (9), and the front and rear pull ropes (10) drive the push plate (607) to move toward each other through the push plate control mechanism until they are clamped on the front and rear sides of the pile body, and the left and right pull ropes (10) drive the two column blocks (703) to move away from each other through the hydraulic control mechanism and are clamped on the side edges of the prefabricated box beams (5) on the adjacent two sides.

2. The viaduct prefabricated box girder hoisting device according to claim 1 is characterized in that: A connecting rope (12) is provided in the middle of the bottom surface of the support platform (3), and the lower end of the connecting rope (12) is fixedly connected to a rope splitting bracket (4); a plurality of rope splitting points are provided on the rope splitting bracket (4), and pulleys are provided at the rope splitting points; the pull rope (10) passes through the pulleys at the corresponding positions and is connected to the hydraulic control mechanism; and the suspension rope (11) passes through the pulleys at the corresponding positions and is connected to the push plate control mechanism.

3. The viaduct prefabricated box girder hoisting device according to claim 1 is characterized in that: The transverse positioning device (6) comprises a U-shaped frame (601), and a plug plate (602) for supporting the prefabricated box beam (5) is slidably connected to the left and right vertical arms of the U-shaped frame (601), and the plug plate (602) is arranged horizontally; the lower ends of the two vertical arms are provided with a rectangular groove (603), and the rectangular groove (603) opens downward; the push plate control mechanism comprises a rectangular plate (605) slidably connected to the rectangular groove (603), and a first compression spring (604) is also arranged in the rectangular groove (603), the upper end of the first compression spring (604) is connected to the top surface of the rectangular groove (603), and the lower end abuts against the upper end of the rectangular plate (605); the lower end of the rectangular plate (605) is fixedly connected to a rectangular block (606), and the rectangular block (606) is arranged horizontally. The rectangular block (606) is provided with a strip groove and a U-shaped groove, and the strip groove is opened inwardly, one end of the U-shaped groove is connected to the strip groove, and the other end opens outwardly; A push plate (607) is slidably connected to the middle of the strip groove, a nylon rope (609) is arranged in the U-shaped groove, one end of the nylon rope (609) is fixedly connected to the push plate (607), and the other end is fixedly connected to a T-shaped rod (610); the ends of the front and rear pull ropes (10) are respectively connected to the T-shaped rods (610) of the two push plate control mechanisms.

4. The viaduct prefabricated box girder hoisting device according to claim 3 is characterized in that: A rectangular protrusion is provided at the upper end of the rectangular plate (605), and a strip-shaped protrusion is provided at the lower end of the push plate (607) on a side away from the pad (608).

5. The viaduct prefabricated box girder hoisting device according to claim 3 is characterized in that: A backing plate (608) is fixedly connected to the end of the push plate (607), and the backing plate (608) and the push plate (607) are arranged in a T shape.

6. The viaduct prefabricated box girder hoisting device according to claim 1, characterized in that: The longitudinal positioning device (7) comprises a columnar shell (701) detachably connected to the side of the prefabricated box beam (5); the columnar shell (701) is openly arranged away from the side of the prefabricated box beam (5); a second compression spring (702) is arranged in the columnar shell (701); a columnar block (703) is slidably connected in the columnar shell (701); a rubber plug (704) is fixedly connected to one end of the columnar block (703) close to the second compression spring (702); the columnar block (703) and the rubber plug (704) are both connected to the columnar The cylindrical housing (701) is slidably and sealably connected, and a liquid filling cavity is formed between the cylindrical housing (701), the cylindrical block (703) and the rubber plug (704); the hydraulic control mechanism comprises a liquid passing pipe (705) connected to the liquid filling cavity, the upper end of the liquid passing pipe (705) is fixedly connected to a liquid storage bin (706) connected to the liquid passing pipe (705), the middle part of the liquid storage bin (706) is slidably and sealably connected to a liquid blocking block (707), and one end of the liquid storage bin (706) away from the liquid passing pipe (705) is clamped with a stopper (708); When the stopper (708) is inserted into the liquid storage tank (706), the second compression spring (702) is compressed, and the columnar block (703) is contracted in the columnar housing (701).

7. The viaduct prefabricated box girder hoisting device according to claim 6, characterized in that: The filling cavity is filled with hydraulic oil, and the viscosity of the hydraulic oil is between 3200-3800CP.

8. The viaduct prefabricated box girder hoisting device according to claim 6, characterized in that: The columnar shell (701) is provided with a connection ear, and the columnar shell (701) is detachably connected to the side of the prefabricated box beam (5) via the connection ear.

9. The viaduct prefabricated box girder hoisting device according to claim 6, characterized in that: The aperture of the liquid passage (705) is less than two millimeters.

10. The viaduct prefabricated box girder hoisting device according to claim 6, characterized in that: The liquid blocking block (707) is made of waterproof rubber.

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