Lifting appliance for lifting concrete bridge deck

Abstract

The utility model relates to the technical field of building construction, and particularly discloses a lifting appliance for lifting a concrete bridge deck slab, which comprises an upper frame and a lower frame, the upper frame comprises a left upper girder and a right upper girder, the lower frame comprises a left lower girder and a right lower girder, and the left upper girder and the right upper girder are connected through a plurality of first square tubes. The left upper girder, the left lower girder, the right upper girder and the right lower girder are all composed of channel steel, the lower frame is connected with a pin shaft connecting area through bolts, and welding is assisted to guarantee stability; in the pin shaft connecting area, the upper lug plate and the lower lug plate are connected through a pin shaft with the diameter of 80 mm so as to be convenient to disassemble; the upper frame is connected with a crane steel wire rope through a shackle and a rigging. During hoisting operation, the dead weight of the bridge deck is transmitted to the lifting appliance through the steel wire rope, and the gravity load is transmitted to hoisting equipment through the lifting appliance. And materials are easy to obtain, installation is easy and convenient, practicability is high, the hoisting stability is improved, and the hoisting quality of the bridge deck is protected.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and specifically relates to a lifting device for hoisting concrete bridge decks. Background Technology

[0002] Bridge deck panels, also known as roadway panels, are load-bearing structures that directly bear the wheel pressure of vehicles. Structurally, they are typically integrally connected to the beam ribs and diaphragms of the main girder. This allows them to transfer vehicle loads to the main girder while simultaneously forming part of the main girder's cross-section, ensuring the overall integrity of the main girder. Bridge deck panels are generally made of reinforced concrete and can be prestressed laterally.

[0003] Insufficient stability and uneven stress during the hoisting of concrete bridge decks can easily lead to cracking or even damage, resulting in safety accidents. Therefore, this application proposes a hoisting device for concrete bridge decks. Utility Model Content

[0004] The purpose of this utility model is to provide a lifting device for hoisting concrete bridge decks to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a lifting device for hoisting concrete bridge decks, comprising an upper frame and a lower frame. The upper frame includes an upper left beam and an upper right beam, and the lower frame includes a lower left beam and a lower right beam. The upper left beam and the upper right beam are connected by multiple first square tubes, and several second square tubes are installed between the lower left beam and the lower right beam.

[0006] The upper frame and the lower frame are respectively equipped with upper ear plates and lower ear plates, and the upper ear plates and the lower ear plates are detachably connected by pins.

[0007] The upper frame is equipped with shackles and rigging, and the upper frame is connected to the crane wire rope via shackles and rigging;

[0008] The lower frame is detachably connected to the concrete bridge deck via an anchor bolt structure.

[0009] Preferably, the upper left beam and the upper right beam are fixed together by welding, and the lower left beam and the lower right beam are fixed together by welding, with the weld being greater than 5mm.

[0010] Preferably, the pin diameter is 60mm, the lower frame is connected to the upper ear plate by fastening bolts, and a shaft end baffle is sleeved on the outside of the fastening bolts.

[0011] Preferably, the shaft end baffle rests against the flat washer, and a spring washer is provided between the flat washer and the head of the fastening bolt.

[0012] Preferably, the anchor bolt structure includes a connecting rod, which is inserted into a lifting hole in the bridge deck and is threaded to the lower frame. The connecting rod is inserted into a sleeve, and the top of the sleeve is provided with an angle that matches the bevel of the bridge deck.

[0013] Preferably, a base plate is provided between the sleeve and the bridge deck, one end of the base plate is fitted with the inclined side of the bridge deck, and the other end of the base plate is fitted with the inclined angle of the sleeve.

[0014] Preferably, the anchor bolt structure further includes a first driving member, which has a first square groove that engages with the square portion at the top of the connecting rod.

[0015] Preferably, a first connecting shaft is installed on the first driving member at a position away from the center. The first connecting shaft is inserted into the synchronization plate, and the other end of the synchronization plate is inserted into the second connecting shaft. The second connecting shaft is fixedly installed on the second driving member at a position away from the center.

[0016] Preferably, a square rod is inserted at the center of the second drive component, the square rod is inserted into the power plate, and the power plate is located on the upper side of the second drive component. Several handles are installed on the power plate, and the handles are distributed upward on the side away from the center line of the power plate. A pressure component is installed on the upper side of the power plate.

[0017] Preferably, the pressure assembly includes an upper pressure plate and a lower pressure plate, with a spring installed between the upper and lower pressure plates. The square rod is inserted into two mounting seats on its upper and lower sides, respectively. The lower mounting seat abuts against the upper side of the bridge panel, and the upper mounting seat abuts against the inclined plate on the lower frame.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] I. The lifting device for hoisting concrete bridge decks of this utility model is mainly composed of channel steel. The upper left beam, lower left beam, upper right beam, and lower right beam are all composed of channel steel. The channel steels are connected by steel pipes with a diameter of 102mm and a thickness of 8mm to form a stable truss structure, namely a stable upper frame and a lower frame. The lifting device is designed as a three-layer box structure. The upper frame and the lower frame are connected by pins in the middle. The lower frame is tightly connected to the bridge deck using an anchor bolt structure. The bridge deck has corresponding pre-reserved hoisting holes.

[0020] The lower frame is connected to the pin shaft area by bolts, supplemented by welding to ensure stability; the pin shaft connection area is connected to the upper frame by welding, with a weld height of not less than 5mm; the pin shaft connection area uses an 80mm diameter pin to connect the upper and lower ear plates for easy disassembly.

[0021] The upper frame is connected to the crane's wire rope via shackles and rigging. Point lifting is used when hoisting the bridge deck panels. The lifting points are located on the top chamfered edge of the panel, with each lifting point consisting of a 60mm diameter hole. During hoisting, the weight of the bridge deck panels is transferred to the lifting equipment via the wire ropes, which then transfers the load to the lifting machinery. The materials are readily available, installation is simple, and the system is highly practical, improving hoisting stability and protecting the quality of the hoisted bridge deck panels.

[0022] II. In this utility model, the power disc is placed on the upper side of the second drive component, and it is pressed on the second drive component by a pressure component. The first drive component connected to the second drive component cooperates with the square part of the connecting rod. It is blocked by the connecting rod and cannot move downward. In this way, when the power disc is rotated, the second drive component can maintain stable synchronous rotation. The tightening work of the connecting rod can be carried out on the outside of the connecting rod. During the rotation, the power disc is on the outside of the lower frame and is not obstructed by the lower frame and other components, making the rotation more convenient. The assembly and disassembly between the lifting device and the bridge deck are also more convenient. Attached Figure Description

[0023] Figure 1 This is one of the structural schematic diagrams of the lifting device for hoisting concrete bridge decks in this utility model.

[0024] Figure 2 This is a cross-sectional view of section AA in this utility model.

[0025] Figure 3 This is a cross-sectional view of section BB in this utility model.

[0026] Figure 4 This is a cross-sectional view of the CC section in this utility model.

[0027] Figure 5 This is the second schematic diagram of the lifting device for hoisting concrete bridge decks in this utility model.

[0028] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0029] Figure 7 This is a schematic diagram of the structure of the first driving component in Embodiment 2 of this utility model.

[0030] In the diagram: 1. Upper left beam; 2. Lower left beam; 3. Upper right beam; 4. Lower right beam; 5. Horizontal coupling structure; 6. Pin; 7. Fastening bolt; 14. Shackle; 15. Rigging; 16. Connecting rod; 17. Sleeve; 18. Base plate; 19. First drive component; 20. First connecting shaft; 21. Synchronizing plate; 22. Second drive component; 23. Power plate; 24. Pressure assembly; 25. Square rod; 26. Mounting base. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1:

[0033] Reference Figures 1-5 A lifting device for assembling concrete bridge decks includes an upper frame and a lower frame. Specifically, the upper frame includes a left upper beam 1 and a right upper beam 3, which are fixed together by welding. The lower frame includes a left lower beam 2 and a right lower beam 4, which are fixed together by welding with a weld joint of not less than 5mm. The left upper beam 1 and the right upper beam 3 are connected by multiple first square tubes. Several second square tubes are installed between the left lower beam 2 and the right lower beam 4. The first square tubes and the second square tubes form a horizontal connection structure 5.

[0034] Upper and lower ear plates are respectively installed on the upper and lower frames. The upper and lower ear plates are detachably connected by a pin 6 with a diameter of 80mm. Specifically, the frame is connected to the upper ear plate by a fastening bolt 7. It should be noted that a shaft end baffle is sleeved on the outside of the fastening bolt 7. The shaft end baffle abuts against a flat washer, and a spring washer is provided between the flat washer and the head of the fastening bolt 7.

[0035] The upper frame is equipped with shackles 14 and rigging 15, and the upper frame is connected to the crane wire rope through shackles 14 and rigging 15.

[0036] The lower frame is detachably connected to the concrete bridge deck via anchor bolts. The concrete bridge deck has lifting holes, into which M30 high-strength bolts are screwed. A positioning frame with welded angle steel clamps is used and connected to the top of the end formwork for fixation. The concrete bridge deck is lifted using a four-point lifting method. The lifting points are located on the top chamfered edge of the deck, with each end consisting of two lifting holes, each 60mm in diameter. During lifting operations, the bridge deck's own weight is transferred to the lifting equipment via steel wire ropes, which then transfer the gravity load to the lifting machinery.

[0037] The anchor bolt structure can be implemented in one embodiment. In one embodiment, the anchor bolt structure includes a connecting rod 16, which is inserted into a lifting hole in the bridge deck and is threaded to the lower frame. The connecting rod 16 is inserted into a sleeve 17, and the top of the sleeve 17 is provided with an angle that engages with the bevel of the bridge deck. A base plate 18 is provided between the sleeve 17 and the bridge deck. One end of the base plate 18 is in contact with the bevel of the bridge deck, and the other end of the base plate 18 is in contact with the angle of the sleeve 17.

[0038] The lower frame is assembled with the bridge deck using multiple anchor bolts, thus completing the assembly between the spreader and the bridge deck. The assembly method is relatively simple and easy to operate.

[0039] Example 2:

[0040] Reference Figure 6 , Figure 7 Based on Embodiment 1, the anchor bolt structure further includes a first driving member 19. The first driving member 19 is provided with a first square groove, which cooperates with the square part at the top of the connecting rod 16. A first connecting shaft 20 is installed on the first driving member 19 at a position away from the center. The first connecting shaft 20 is inserted into the synchronous plate 21, and the other end of the synchronous plate 21 is inserted into the second connecting shaft. The second connecting shaft is fixedly installed on the second driving member 22 at a position away from the center.

[0041] It should be noted that a square rod 25 is inserted at the center of the second drive component 22. The square rod 25 is inserted into the power plate 23, and the power plate 23 is located on the upper side of the second drive component 22. Several handles are installed on the power plate 23. The handles are distributed upward on the side away from the center line of the power plate 23. A pressure component 24 is installed on the upper side of the power plate 23.

[0042] The pressure assembly 24 includes an upper pressure plate and a lower pressure plate. A spring is installed between the upper and lower pressure plates. It should be noted that the square rod 25 is inserted into two mounting seats 26 on its upper and lower sides respectively. The lower mounting seat 26 abuts against the upper side of the bridge panel, and the upper mounting seat 26 abuts against the inclined plate on the lower frame.

[0043] The connecting rod 16 is passed through the hoisting hole from bottom to top and screwed into the lower frame. As the height of the connecting rod 16 increases, the force required for its rotation gradually increases. However, the space at the bottom of the bridge panel is small, making it inconvenient to operate the tool for tightening the connecting rod 16. Therefore, a first drive member 19 and a second drive member 22 are provided at the connecting rod 16. In use, the two mounting seats 26 are placed against the bridge panel and the inclined plate respectively. The first square groove in the first drive member 19 is inserted into the square part at the top of the connecting rod 16, and then the power plate 23 is rotated.

[0044] During the rotation of the power disc 23, the square rod 25 can be driven to rotate. The square rod 25 drives the second drive component 22 on it to rotate. During the rotation of the second drive component 22, the first drive component 19 is driven to rotate synchronously through the second connecting shaft, the synchronous plate 21, and the first connecting shaft 20. The first drive component 19 rotates around the center line of the connecting rod 16, which can tighten the connecting rod 16. During the tightening process, the height of the connecting rod 16 is raised. Correspondingly, the heights of the second drive component 22 and the power disc 23 are raised synchronously.

[0045] The power disc 23 is located on the upper side of the second drive member 22. It is pressed onto the second drive member 22 by the pressure assembly 24. The first drive member 19 connected to the second drive member 22 cooperates with the square part of the connecting rod 16. It is blocked by the connecting rod 16 and cannot move downward. In this way, when the power disc 23 is rotated, the second drive member 22 can maintain stable synchronous rotation. The tightening work of the connecting rod 16 can be carried out on the outside of the connecting rod 16. During the rotation, the power disc 23 is on the outside of the lower frame, and the rotation is not hindered by the lower frame and other components, making the rotation more convenient. The assembly and disassembly between the lifting device and the bridge deck are also more convenient.

[0046] Working principle:

[0047] The lifting device for hoisting concrete bridge decks is mainly composed of channel steel. The upper left beam 1, lower left beam 2, upper right beam 3, and lower right beam 4 are all composed of channel steel. The channel steels are connected by steel pipes with a diameter of 102mm and a thickness of 8mm to form a stable truss structure, namely a stable upper frame and lower frame.

[0048] The lifting device is designed as a three-layer box structure, with the upper frame and the lower frame connected by a pin 6 in the middle. The lower frame is tightly connected to the bridge deck using an anchor bolt structure, and corresponding lifting holes are reserved on the bridge deck.

[0049] The lower frame is connected to the pin 6 by bolts, supplemented by welding to ensure stability; the pin 6 connection area is connected to the upper frame by welding, and the weld height is not less than 5mm; the pin 6 connection area uses an 80mm diameter pin 6 to connect the upper ear plate and the lower ear plate for easy disassembly.

[0050] The upper frame is connected to the crane wire rope via shackles 14 and rigging 15. M30 high-strength bolts are used for forming the lifting holes, and a positioning frame with angle steel welded clamps is used and connected to the top of the end mold for fixation. The bridge deck is lifted at four points, with the lifting points located on the top chamfered plate. Each lifting point consists of two lifting holes, each with a diameter of 60mm. During lifting operations, the bridge deck's own weight is transferred to the lifting equipment via wire ropes, which then transfer the gravity load to the lifting equipment.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting device for hoisting concrete bridge decks, comprising an upper frame and a lower frame, characterized in that, The upper frame includes a left upper beam (1) and a right upper beam (3), and the lower frame includes a left lower beam (2) and a right lower beam (4). The left upper beam (1) and the right upper beam (3) are connected by multiple first square tubes, and several second square tubes are installed between the left lower beam (2) and the right lower beam (4). The upper frame and the lower frame are respectively equipped with an upper ear plate and a lower ear plate, and the upper ear plate and the lower ear plate are detachably connected by a pin (6); The upper frame is equipped with shackles (14) and rigging (15), and the upper frame is connected to the crane wire rope through the shackles (14) and rigging (15); The lower frame is detachably connected to the concrete bridge deck via an anchor bolt structure.

2. The lifting device for hoisting concrete bridge decks according to claim 1, characterized in that, The upper left beam (1) and the upper right beam (3) are fixed together by welding, and the lower left beam (2) and the lower right beam (4) are fixed together by welding, with the weld seam being greater than 5mm.

3. The lifting device for hoisting concrete bridge decks according to claim 1, characterized in that, The pin (6) has a diameter of 80mm. The lower frame is connected to the upper ear plate by fastening bolts (7). A shaft end baffle is sleeved on the outside of the fastening bolts (7).

4. The lifting device for hoisting concrete bridge decks according to claim 3, characterized in that, The shaft end baffle rests against the flat washer, and a spring washer is provided between the flat washer and the head of the fastening bolt (7).

5. The lifting device for hoisting concrete bridge decks according to claim 1, characterized in that, The anchor bolt structure includes a connecting rod (16), which is inserted into the hoisting hole in the bridge deck and is connected to the lower frame by a thread. The connecting rod (16) is inserted into a sleeve (17), and the top of the sleeve (17) is provided with an angle that matches the inclined edge of the bridge deck.

6. The lifting device for hoisting concrete bridge decks according to claim 5, characterized in that, A base plate (18) is provided between the sleeve (17) and the bridge deck. One end of the base plate (18) is attached to the inclined side of the bridge deck, and the other end of the base plate (18) is attached to the inclined angle of the sleeve (17).

7. The lifting device for hoisting concrete bridge decks according to claim 1, characterized in that, The anchor bolt structure also includes a first driving member (19), which has a first square groove that engages with the square portion at the top of the connecting rod (16).

8. The lifting device for hoisting concrete bridge decks according to claim 7, characterized in that, A first connecting shaft (20) is installed on the first driving member (19) at a position away from the center. The first connecting shaft (20) is inserted into the synchronization plate (21), and the other end of the synchronization plate (21) is inserted into the second connecting shaft. The second connecting shaft is fixedly installed on the second driving member (22) at a position away from the center.

9. A lifting device for hoisting concrete bridge decks according to claim 8, characterized in that, A square rod (25) is inserted at the center of the second drive member (22). The square rod (25) is inserted into the power plate (23), and the power plate (23) is located on the upper side of the second drive member (22). Several handles are installed on the power plate (23). The handles are distributed upward on the side away from the center line of the power plate (23). A pressure component (24) is installed on the upper side of the power plate (23).

10. A lifting device for hoisting concrete bridge decks according to claim 9, characterized in that, The pressure assembly (24) includes an upper pressure plate and a lower pressure plate. A spring is installed between the upper pressure plate and the lower pressure plate. The square rod (25) is inserted into two mounting seats (26) on its upper and lower sides respectively. The lower mounting seat (26) abuts against the upper side of the bridge panel, and the upper mounting seat (26) abuts against the inclined plate on the lower frame.

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