An adjustable linear spreader for arch rib vertical precasting and method of use thereof

Abstract

The present application provides a kind of adjustable linear hanger for arch rib vertical prefabrication, including connecting beam and several adjusting parts, several adjusting parts are connected with the connecting beam and are arranged along the length direction of the connecting beam;The adjusting part includes lifting rope, and the length of the lifting rope can be adjusted.The present application also provides a kind of using method of adjustable linear hanger for arch rib vertical prefabrication.The present application can make the top plate reinforcement linearly match with the top surface of arch rib prefabrication pedestal and realize the accurate lifting of top plate reinforcement.

Description

[Technical Field]

[0001] This invention relates to the field of bridge construction technology, specifically to an adjustable linear lifting tool for vertical prefabrication of arch ribs and its usage method. [Background Technology]

[0002] With the development of China's economy, bridge construction has progressed rapidly. Concrete arch bridges are a classic bridge type, widely used worldwide due to their aesthetic appeal, structural stability, and high load-bearing capacity. Traditional construction methods for concrete arch bridges mainly involve cast-in-place or horizontal prefabrication. Cast-in-place methods are significantly affected by the construction site, especially when constructing bridges across waterways, roads, or railways, making them unsuitable for certain construction needs. Horizontal prefabrication, on the other hand, places stringent requirements on arch ring rotation. Especially under the influence of current mainstream design concepts in China, the quick and lightweight small arch rings generally have thin walls, typically around 10-20 cm, making them prone to structural damage due to construction errors during rotation. For these reasons, vertical prefabrication is now generally used for small-span arch bridges with site constraints.

[0003] In vertical precast construction, the top slab reinforcement is a plate-like structure made of tied steel bars, laid flat on the ground after binding, with a thickness of about 10-20 cm. To facilitate the casting of the arch rib segments, the top slab reinforcement needs to be hoisted above the bottom web reinforcement of the arch rib, which has already been laid on the arch rib precast platform, and then connected to form a reinforcement cage for casting the arch rib segments. Furthermore, the top slab reinforcement needs to maintain consistency with the top surface alignment of the arch rib precast platform. When hoisting the top slab reinforcement above the bottom web reinforcement of the arch rib, a common problem arises: the horizontal installation of the top slab reinforcement does not match the alignment of the platform, leading to collisions and obstruction, preventing its lowering. Therefore, this application aims to solve the following problems: 1. How to achieve matching between the top slab reinforcement and the top surface alignment of the arch rib precast platform; 2. How to achieve accurate hoisting of the top slab reinforcement. [Summary of the Invention]

[0004] The present invention aims to solve at least one of the technical problems mentioned above, and provides an adjustable linear lifting tool for vertical prefabrication of arch ribs and its method of use, which enables the top plate reinforcement to match the top surface linearity of the arch rib prefabrication platform and achieves accurate lifting of the top plate reinforcement.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An adjustable linear lifting device for vertical prefabrication of arch ribs includes a connecting beam and several adjusting components, all of which are connected to the connecting beam and are spaced apart along the length of the connecting beam; each adjusting component includes a lifting rope, the length of which is adjustable.

[0007] Furthermore, the adjusting component also includes a connecting part and an adjusting part, the connecting part being connected to the connecting beam; the adjusting part includes a rotating shaft, a limiting plate, a dial, a dial pointer, and a handle, the rotating shaft being rotatably mounted on the connecting part and the axis of the rotating shaft being perpendicular to the connecting beam; the limiting plate being sleeved on the rotating shaft and capable of engaging with or disengaging from the connecting part; the dial being mounted on the side of the connecting part opposite to the limiting plate; the dial pointer being fixed to the end of the rotating shaft and located on the side of the dial opposite to the limiting plate, and capable of rotating axially relative to the dial; the handle being detachably mounted on the end of the rotating shaft opposite to the dial pointer; and the suspension rope being wound around the rotating shaft without overlapping.

[0008] Furthermore, the connecting part includes a horizontal steel bar and two welded plates. The horizontal steel bar is connected to the connecting beam, and the two welded plates are fixed to the opposite ends of the horizontal steel bar. An adjusting part is installed on one of the welded plates.

[0009] Furthermore, the welding plate includes two steel plates and a welding rod. The two steel plates are parallel and opposite to each other and are fixed to the ends of the horizontal steel. The two steel plates are connected at opposite ends of the welding rod. The rotating shaft rotatably passes through the two steel plates and can move away from or towards the other welding plate. One of the steel plates has a slot adapted to the limiting plate on the side facing the other steel plate, and the limiting plate can be engaged in the slot.

[0010] Furthermore, the adjustment part also includes an arc-shaped plate, which is disposed on one side of one of the steel plates facing the other steel plate. The arc-shaped plate is provided with a recess that is adapted to the suspension rope at the position where the suspension rope passes through the steel plate.

[0011] Furthermore, the end of the rotating shaft opposite to the dial pointer is provided with a flat hexagonal shaft with a diameter smaller than that of the rotating shaft body. The end of the flat hexagonal shaft opposite to the rotating shaft is provided with a bolt rod. The handle is provided with a six-hole face that is adapted to the flat hexagonal shaft. A locking plate is detachably screwed onto the bolt rod. The length of the locking plate is less than the lateral width of the six-hole face and greater than the longitudinal width of the six-hole face.

[0012] Furthermore, a reinforcing rod is connected between two adjacent adjusting members.

[0013] A method for using an adjustable linear lifting device for vertical prefabrication of arch ribs includes the following steps:

[0014] Equipment preparation: Prepare one of the above-mentioned adjustable linear lifting devices and gantry cranes for vertical prefabrication of arch ribs;

[0015] Equipment arrangement: The gantry crane is erected above the arch rib prefabrication platform, and the adjustable linear lifting device for vertical prefabrication of the arch rib is hooked onto the gantry crane.

[0016] Connecting the equipment to the top plate reinforcement: The top plate reinforcement is laid flat under the gantry crane device, and the free ends of the lifting ropes of several of the adjusting components are fixed to the top plate reinforcement;

[0017] Adjust the length of the hoisting rope: Adjust the length of the free end of the hoisting rope away from the rotation axis according to the arc shape of the arch rib precast platform, so that the line connecting the free ends of several hoisting ropes is consistent with the arc shape of the arch rib precast platform.

[0018] Hooking the top slab reinforcement: The adjustable linear lifting device used for the vertical prefabrication of the arch rib is lifted by the gantry crane device. The top slab reinforcement changes from a straight line to an arc shape under the drive of the free end of the lifting rope, and the arc shape is consistent with the arc shape of the arch rib prefabrication platform.

[0019] Top slab reinforcement arrangement: The gantry crane is used to move the arc-shaped top slab reinforcement to the top of the arch rib prefabrication platform, so that the top slab reinforcement is aligned and connected with the bottom web reinforcement of the arch rib, thus completing the hoisting and placement of the top slab reinforcement.

[0020] Furthermore, the specific steps for "adjusting the length of the suspension rope" are as follows:

[0021] Step A1: Confirm the preset length L of the free end of the suspension rope extending beyond the rotating shaft: the vertical distance from the plane where the axis endpoint of the rotating shaft is located to the top surface of the precast arch rib platform is L;

[0022] Step A2: Disconnect the limiting plate from the connecting part;

[0023] Step A3: Rotate the rotating shaft, and according to the number of revolutions of the dial pointer on the dial, make the free end of the suspension rope deviate from the rotating shaft by a length of L.

[0024] Step A4: Rotate the rotating shafts on several of the adjusting components in sequence to complete the length adjustment of the suspension rope.

[0025] Furthermore, the specific steps for "rotating the rotating shaft" are as follows:

[0026] Step B1: If the circumference of the circular cross-section of the rotating shaft is C, then the number of rotations of the rotating shaft is N = L / C.

[0027] Step B2: Rotate the rotating shaft. When the number of rotations of the dial pointer is N, stop rotating. At this time, the length of the free end of the suspension rope away from the rotating shaft is L.

[0028] By adopting the above technical solution, the present invention has the following beneficial effects:

[0029] 1. Since the length of the lifting rope can be adjusted, before using the adjustable linear lifting tool for vertical precast arch ribs to lift the top slab reinforcement, adjust the length of the lifting rope in several adjusting parts so that the line connecting the free ends of the lifting rope in several adjusting parts is consistent with the top surface line of the arch rib precast platform. Then lift the top slab reinforcement to match the top surface line of the arch rib precast platform.

[0030] 2. Since the dial pointer is mounted on the rotating shaft, it records the number of rotations of the shaft as the pointer rotates, thus allowing calculation of the length of the free end of the hoisting rope away from the shaft. Therefore, the dial pointer quantifies the number of rotations of the shaft, enabling more precise adjustment of the hoisting rope length and ultimately achieving accurate placement of the top slab reinforcement. [Attached Image Description]

[0031] Figure 1 This is a schematic diagram of the adjustable linear lifting device used for vertical prefabrication of arch ribs in this invention.

[0032] Figure 2 This is a schematic diagram of the installation of the adjustment unit.

[0033] Figure 3 for Figure 2 A schematic diagram of the explosion state.

[0034] Figure 4 This is a diagram showing how to install the handle.

[0035] Figure 5 This is a schematic diagram of the installation of the locking plate and handle.

[0036] Figure 6 A three-dimensional schematic diagram of an adjustable linear lifting device used for vertical prefabrication of arch ribs to lift the top slab reinforcement.

[0037] Figure 7 for Figure 6 Side view.

[0038] In the attached diagram, 100-top slab reinforcement, 101-gantry crane device, 102-arch rib prefabrication platform, 103-hooking wire rope, 104-arch rib bottom web reinforcement, 200-adjustable linear lifting device for vertical prefabrication of arch rib, 1-connecting beam, 2-adjusting component, 21-lifting rope, 211-wire rope fixing clamp, 22-rotating shaft, 221-handle, 222-main bearing, 223-flat hexagonal shaft, 224-bolt rod, 225-locking plate, 23-limiting plate, 24-dial pointer, 241-dial, 25-horizontal steel, 26-welded plate, 261-steel plate, 262-slot, 263-welded rod, 264-groove, 265-reinforcing rod, 27-arc plate.

Detailed Implementation Methods

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or it may be centered within another component. When a component is described as "set to" another component, it can be directly set on the other component or it may be centered within another component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this article are for illustrative purposes only.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] like Figures 1 to 5 As shown, a preferred embodiment of the present invention provides an adjustable linear lifting tool for vertical prefabrication of arch ribs, used for lifting and installing the top slab reinforcement 100 in the vertical prefabrication of concrete arch ribs.

[0043] The adjustable linear lifting device for vertical prefabrication of arch ribs includes a connecting beam 1 and several adjusting components 2. The adjusting components 2 are all connected to the connecting beam 1 and are spaced apart along the length of the connecting beam 1. The adjusting component 2 includes a lifting rope 21, the length of which is adjustable.

[0044] Since the length of the lifting rope 21 is adjustable, before using the adjustable linear lifting tool for vertical prefabrication of the arch rib to lift the top plate steel bar 100, the length of the lifting rope 21 in several adjusting parts 2 is adjusted so that the line connecting the free ends of the lifting rope 21 in several adjusting parts 2 is consistent with the top surface line of the arch rib prefabrication platform. Then the top plate steel bar 100 is lifted, so that the top plate steel bar 100 matches the top surface line of the arch rib prefabrication platform 102.

[0045] In this embodiment, the adjusting member 2 further includes a connecting part and an adjusting part. The connecting part is connected to the connecting beam 1. Specifically, the connecting part includes a horizontal steel 25 and two welded plates 26. The horizontal steel 25 is connected to the connecting beam 1. More specifically, the connecting beam 1 is made of channel steel, and the middle part of the horizontal steel 25 is welded to the connecting beam 1, and several horizontal steels 25 are spaced apart along the length direction of the connecting beam 1.

[0046] Two welded plates 26 are fixed to opposite ends of the horizontal steel 25. Specifically, the welded plates 26 include two steel plates 261 and a welding rod 263. The two steel plates 261 are parallel and opposite to each other and are fixed to the ends of the horizontal steel 25. More specifically, the two steel plates 261 have through holes adapted to the horizontal steel 25. The two steel plates 261 are sleeved on the horizontal steel 25 through the through holes and welded. The opposite ends of the welding rod 263 are connected to the two steel plates 261 by welding. The two steel plates 261 and the horizontal steel 25 form a groove 264.

[0047] An adjustment mechanism is mounted on a welded plate 26. Specifically, the adjustment mechanism includes a rotating shaft 22, a limiting plate 23, a dial 241, a dial pointer 24, and a handle 221. The rotating shaft 22 is rotatably mounted on the connecting part, and the axis of the rotating shaft 22 is perpendicular to the connecting beam 1. More specifically, the rotating shaft 22 is a cylindrical main bearing 222, with its opposite ends rotatably passing through two steel plates 261, and the main bearing 222 is movably connected to both steel plates 261. Because the main bearing 222 is movably connected to the corresponding steel plate 261, the rotating shaft 22 can move away from or towards the other welded plate 26.

[0048] The limiting plate 23 is sleeved on the rotating shaft 22 and can be engaged with or disengaged from the connecting part. Specifically, the limiting plate 23 is a gear, fixedly sleeved on the main bearing 222, and positioned between two steel plates 261, closer to one of the steel plates 261. A groove 262 adapted to the limiting plate 23 is provided on the side of the steel plate 261 closer to the other steel plate 261. When the rotating shaft 22 moves away from the other welded plate 26, the limiting plate 23 engages in the groove 262, preventing the rotating shaft 22 from rotating. When the rotating shaft 22 moves closer to the other welded plate 26, the limiting plate 23 disengages from the corresponding groove 262, allowing the operator to rotate the rotating shaft 22.

[0049] The dial 241 is mounted on the side of the connecting part away from the limiting plate 23; the dial pointer 24 is fixed to the end of the rotating shaft 22 and located on the side of the dial 241 away from the limiting plate 23. The dial pointer 24 can rotate axially relative to the dial 241. Specifically, the dial 241 is fixedly mounted on the side of the steel plate 261 without the slot 262 away from the slot 262, and the dial 241 has a through hole corresponding to the rotating shaft 22, through which the rotating shaft 22 is movably installed; the dial pointer 24 is fixed to the end of the rotating shaft 22 that passes through the dial 241 so that the dial pointer 24 can point to the scale on the dial 241. When the limiting plate 23 is engaged in the slot 262, the dial pointer 24 cannot be rotated; when the limiting plate 23 is disengaged from the slot 262, when the operator rotates the rotating shaft 22, the dial pointer 24 rotates with the rotating shaft 22, and the operator can read the number of rotations and the scale of the rotating shaft 22 from the direction of the dial pointer 24.

[0050] The suspension rope 21 is wound around the rotating shaft 22 without overlapping. Specifically, the suspension rope 21 is a steel wire rope, and one end of the suspension rope 21 is fixed to the steel plate 261 with a slot 262 by a steel wire rope fixing clamp 211; the suspension rope 21 is wound around the part of the main bearing 222 located in the groove 264.

[0051] The handle 221 is detachably mounted on the end of the rotating shaft 22 away from the dial pointer 24. Specifically, the end of the rotating shaft 22 away from the dial pointer 24 has a flat hexagonal shaft 223 with a diameter smaller than the shaft body of the rotating shaft 22. The cross-section of the flat hexagonal shaft 223 perpendicular to its central axis is a hexagon with a horizontal diameter larger than its vertical diameter. The end of the flat hexagonal shaft 223 away from the main bearing 222 has a bolt rod 224, which extends away from the flat hexagonal shaft 223. The handle 221 has six holes that fit the flat hexagonal shaft 223. A locking plate 225 is detachably screwed onto the bolt rod 224. The length of the locking plate 225 is less than the horizontal width of the six holes but greater than the vertical width of the six holes. For details, see [link to documentation]. Figure 5The length of the locking plate 225 is H, the lateral width of the six holes is R, and the longitudinal width of the six holes is r, where R > H > r. When the locking plate 225 is screwed to... Figure 5 When the handle 221 is in the vertical position, it can be detached from the flat hexagonal shaft 223; when the locking plate 225 is turned to the vertical position, the handle 221 is restricted by the locking plate 225 to the flat hexagonal shaft 223.

[0052] In this embodiment, the adjustment unit further includes an arc-shaped plate 27, which is disposed on the side of one steel plate 261 facing the other steel plate 261. Specifically, the arc-shaped plate 27 is installed on the side of the steel plate 261 where the slot 262 is provided. The arc-shaped plate 27 has a recess that is adapted to the position where the suspension rope 21 passes through the steel plate 261. When one end of the suspension rope 21 is fixed to the steel plate 261 with the slot 262, one end of the suspension rope 21 is fixed to the side facing the handle 221 and fixed by the wire rope fixing clamp 211. After the suspension rope 21 passes through the corresponding steel plate 261, it is mounted on the arc-shaped plate 27 and then wound around the main bearing 222. Since the arc-shaped plate 27 can isolate the connection between the suspension rope 21 and the steel plate 261, the friction between the suspension rope 21 and the steel plate 261 can be effectively reduced.

[0053] This embodiment also provides a method for using an adjustable linear lifting device for vertical prefabrication of arch ribs, see [link to relevant documentation]. Figures 1 to 7 It is used to lift the top slab reinforcement 100 laid flat on the ground and place it above the arch rib precast platform 102. The specific steps are as follows:

[0054] Equipment preparation: Prepare the above-mentioned adjustable linear lifting device 200 for vertical prefabrication of arch ribs and gantry crane device 101. The gantry crane device 101 is a commonly used device in this field and will not be described in detail here.

[0055] Equipment Layout: The gantry crane device 101 is erected above the arch rib prefabrication platform 102. Specifically, the top beam of the gantry crane device 101 is located above the arch rib prefabrication platform 102 and perpendicular to the length direction of the arch rib prefabrication platform 102. The adjustable linear lifting device 200 for vertical prefabrication of the arch rib is hooked onto the gantry crane device 101. Specifically, the gantry crane device 101 includes a hooked wire rope 103, and a wire rope buckle is welded on the connecting beam 1. The hooked wire rope 103 is fixedly connected to the wire rope buckle on the connecting beam 1. The structure of the wire rope buckle and its connection method with the hooked wire rope 103 are well known to those skilled in the art and will not be described in detail here.

[0056] Connecting the equipment to the top slab reinforcement 100: The top slab reinforcement 100 is laid flat below the gantry crane device 101 and parallel to the length direction of the arch rib precast platform 102. The free ends of the lifting ropes 21 of several adjusting components 2 are fixed to the top slab reinforcement 100. Specifically, a wire rope buckle is provided on the top slab reinforcement 100, and the free ends of the lifting ropes 21 are fixed to the wire rope buckles. It should be noted that the length of the free ends of the lifting ropes 21 of each adjusting component 2 fixed to the wire rope buckles must be the same.

[0057] Adjust the length of the suspension rope 21: Adjust the length of the free end of the suspension rope 21 away from the rotating shaft 22 according to the arc shape of the arch rib precast platform 102, so that the line connecting the free ends of several suspension ropes 21 is consistent with the arc shape of the arch rib precast platform 102.

[0058] Hooking the top slab reinforcement 100: The adjustable linear lifting device 200 used for the vertical prefabrication of the arch rib is lifted by the gantry crane device 101. The top slab reinforcement 100 changes from a straight line to an arc shape under the drive of the free end of the lifting rope 21, and the arc shape is consistent with the arc shape of the arch rib prefabrication platform 102.

[0059] Arrangement of top slab reinforcement 100: The arc-shaped top slab reinforcement 100 is moved above the arch rib prefabrication platform 102 using a gantry crane device 101, so that the top slab reinforcement 100 is aligned and connected with the bottom web reinforcement 104 of the arch rib. The alignment and connection are well known to those skilled in the art and will not be described in detail here, thus completing the hoisting and placement of the top slab reinforcement 100.

[0060] In this embodiment, the specific steps for "adjusting the length of the suspension rope 21" are as follows:

[0061] Step A1: Confirm the preset length L of the free end of the hoisting rope 21 extending beyond the rotating shaft 22: The vertical distance L from the plane containing the endpoint of the axis of the rotating shaft 22 to the top surface of the precast arch rib platform 102 is specified in the relevant documentation. Figures 6 to 7 Since the height from the hook end of the hook wire rope 103 to the top beam of the gantry crane device 101 can be set to a fixed value by the construction personnel after the hook wire rope 103 lifts the top plate reinforcement 100, and the distance from the top surface of the connecting beam 1 to the axis of the rotating shaft 22 is also a fixed value, when confirming the preset length L of the free end of the lifting rope 21 extending out of the rotating shaft 22, the vertical distance from the plane where the axis endpoint of the rotating shaft 22 is located to the top surface of the arch rib precast platform 102 can be referenced, and then the distance L of the lifting rope 21 in each adjusting piece 2 can be corresponding to that distance.

[0062] Step A2: Disconnect the limiting plate 23 from the connecting part. Specifically, move the rotating shaft 22 toward the other welded plate 26. The limiting plate 23 can then disengage from the slot 262 of the corresponding steel plate 261. At this point, the operator can rotate the rotating shaft 22.

[0063] Step A3: Rotate the rotating shaft 22, and according to the number of rotations of the dial pointer 24 on the dial 241, make the free end of the suspension rope 21 distance from the rotating shaft 22 by a length of L.

[0064] Step A4: Rotate the rotating shaft 22 on several adjusting parts 2 in sequence to complete the length adjustment of the hoisting rope 21; then engage the limiting plate 23 into the slot 262. After completing the length adjustment of the hoisting rope 21, the operator can choose to detach the handle 221 from the main bearing 222.

[0065] By using the axis of the top beam of the gantry crane device 101, the hook wire rope 103, the connecting beam 1, and the rotating shaft 22, the length L of the free end of the hoisting rope 21 extending beyond the rotating shaft 22 can be determined, which can reduce measurement errors and increase the accuracy of hoisting the top plate reinforcement 100.

[0066] In this embodiment, the specific steps of "rotating the rotating shaft 22" are as follows:

[0067] Step B1: The circumference of the circular cross section of the rotating shaft 22 perpendicular to its central axis is C. Then the number of rotations of the rotating shaft 22 is N = L / C.

[0068] Step B2: Rotate the rotating shaft 22. When the number of rotations of the dial pointer 24 is displayed as N, stop rotating. At this time, the length of the free end of the suspension rope 21 away from the rotating shaft 22 is L.

[0069] Since the dial pointer 24 is mounted on the rotating shaft 22, it records the number of rotations of the rotating shaft 22 as the shaft rotates, thus allowing the calculation of the length of the free end of the hoisting rope 21 away from the rotating shaft 22. Therefore, the dial pointer 24 quantifies the number of rotations of the rotating shaft 22, thereby enabling more accurate adjustment of the length of the hoisting rope 21 and ultimately achieving accurate hoisting of the top slab reinforcement 100.

[0070] In addition, the adjustable linear lifting tool used for vertical prefabrication of arch ribs can be assembled on-site using commonly used materials in on-site construction. It is applicable to the installation of the top plate reinforcement 100 in vertical prefabrication of arch ribs under different conditions. It can quickly adjust the linearity, so that the top plate reinforcement 100 can quickly fit the linearity of the bottom web reinforcement 104 of the arch rib and complete the installation, which greatly saves the on-site construction period.

[0071] The above description is a detailed description of the preferred embodiments of the present invention. However, the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications made under the technical spirit of the present invention should fall within the patent scope covered by the present invention.

Claims

1. An adjustable linear lifting device for vertical prefabrication of arch ribs, characterized in that: The system includes a connecting beam (1) and several adjusting components (2), all of which are connected to the connecting beam (1) and are spaced apart along the length of the connecting beam (1). Each adjusting component (2) includes a suspension rope (21) whose length is adjustable. Each adjusting component (2) also includes a connecting part and an adjusting part, the connecting part being connected to the connecting beam (1). The adjusting part includes a rotating shaft (22), a limiting plate (23), a dial (241), a dial pointer (24), and a handle (221). The rotating shaft (22) is rotatably mounted on the connecting part, and the axis of the rotating shaft (22) is perpendicular to the connecting beam (1). The limiting plate (23) is sleeved on the rotating shaft. The rotating shaft (22) is mounted on the connecting part and the limiting plate (23) can be engaged with or disengaged from the connecting part; the dial (241) is mounted on the side of the connecting part away from the limiting plate (23); the dial pointer (24) is fixed to the end of the rotating shaft (22) and located on the side of the dial (241) away from the limiting plate (23), and the dial pointer (24) can rotate axially relative to the dial (241); the handle (221) is detachably mounted on the end of the rotating shaft (22) away from the dial pointer (24); the suspension rope (21) is wound around the rotating shaft (22) and the suspension rope (21) does not overlap around the rotating shaft (22).

2. The adjustable linear lifting device for vertical prefabrication of arch ribs as described in claim 1, characterized in that: The connecting part includes a horizontal steel (25) and two welded plates (26). The horizontal steel (25) is connected to the connecting beam (1), and the two welded plates (26) are fixed to the opposite ends of the horizontal steel (25). An adjustment part is installed on one of the welded plates (26).

3. The adjustable linear lifting device for vertical prefabrication of arch ribs as described in claim 2, characterized in that: The welding plate (26) includes two steel plates (261) and a welding rod (263). The two steel plates (261) are parallel to each other and fixed to the ends of the horizontal steel (25). The two steel plates (261) are connected to opposite ends of the welding rod (263). The rotating shaft (22) rotatably passes through the two steel plates (261) and can move away from or towards the other welding plate (26). One of the steel plates (261) has a slot (262) adapted to the limiting plate (23) on the side facing the other steel plate (261). The limiting plate (23) can be engaged in the slot (262).

4. An adjustable linear lifting device for vertical prefabrication of arch ribs as described in claim 3, characterized in that: The adjustment part also includes an arc plate (27), which is disposed on one side of one of the steel plates (261) facing the other steel plate (261). The arc plate (27) is located at the position where the suspension rope (21) passes through the steel plate (261) and is provided with a recess that is adapted to the suspension rope (21).

5. An adjustable linear lifting device for vertical prefabrication of arch ribs as described in claim 1, characterized in that: The rotating shaft (22) has a flat hexagonal shaft (223) with a diameter smaller than that of the rotating shaft (22) at one end away from the dial pointer (24). The flat hexagonal shaft (223) has a bolt rod (224) at one end away from the rotating shaft (22). The handle (221) has a six-hole face that is adapted to the flat hexagonal shaft (223). A locking plate (225) is detachably screwed onto the bolt rod (224). The length of the locking plate (225) is smaller than the lateral width of the six-hole face and larger than the longitudinal width of the six-hole face.

6. An adjustable linear lifting device for vertical prefabrication of arch ribs as described in claim 1, characterized in that: A reinforcing rod (265) is connected between two adjacent adjusting members (2).

7. A method for using an adjustable linear lifting device for vertical prefabrication of arch ribs, characterized in that, Includes the following steps: Equipment preparation: Prepare an adjustable linear lifting device (200) and a gantry crane device (101) for vertical prefabrication of arch ribs as described in claim 1. Equipment arrangement: The gantry crane device (101) is erected above the arch rib prefabrication platform (102), and the adjustable linear lifting device (200) for vertical prefabrication of the arch rib is hooked onto the gantry crane device (101). Connecting equipment to top plate reinforcement (100): The top plate reinforcement (100) is laid flat under the gantry crane device (101), and the free ends of the lifting ropes (21) of several of the adjusting components (2) are fixed to the top plate reinforcement (100); Adjust the length of the suspension rope (21): Adjust the length of the free end of the suspension rope (21) away from the rotating shaft (22) according to the arc shape of the arch rib prefabrication platform (102) so that the line connecting the free ends of several suspension ropes (21) is consistent with the arc shape of the arch rib prefabrication platform (102). Hooking the top slab reinforcement (100): The adjustable linear lifting device (200) for the vertical prefabrication of the arch rib is lifted by the gantry crane device (101). The top slab reinforcement (100) changes from a straight line to an arc shape under the drive of the free end of the lifting rope (21), and the arc shape is consistent with the arc shape of the arch rib prefabrication platform (102). Arrangement of top slab reinforcement (100): The arc-shaped top slab reinforcement (100) is moved above the arch rib prefabrication platform (102) by the gantry crane device (101), so that the top slab reinforcement (100) is aligned and connected with the bottom web reinforcement (104) of the arch rib, thus completing the hoisting and placement of the top slab reinforcement (100).

8. The method of using an adjustable linear lifting device for vertical prefabrication of arch ribs as described in claim 7, characterized in that, The specific steps for "adjusting the length of the suspension rope (21)" are as follows: Step A1: Confirm the length L of the free end of the suspension rope (21) extending beyond the rotating shaft (22): The vertical distance from the plane where the axis endpoint of the rotating shaft (22) is located to the top surface of the arch rib prefabrication platform (102) is L; Step A2: Disconnect the limiting plate (23) from the connecting part; Step A3: Rotate the rotating shaft (22) and, according to the number of rotations of the dial pointer (24) on the dial (241), make the length of the free end of the suspension rope (21) away from the rotating shaft (22) be L. Step A4: Rotate the rotating shaft (22) on several of the adjustment components (2) in sequence to complete the length adjustment of the suspension rope (21).

9. The method of using an adjustable linear lifting device for vertical prefabrication of arch ribs as described in claim 8, characterized in that, The specific steps for "rotating the rotating shaft (22)" are as follows: Step B1: The circumference of the circular cross section of the rotating shaft (22) is C, then the number of rotations of the rotating shaft (22) is N=L / C; Step B2: Rotate the rotating shaft (22). When the number of rotations of the dial pointer (24) is displayed as N, stop rotating. At this time, the length of the free end of the suspension rope (21) away from the rotating shaft (22) is L.

Images