Anti-deformation hoist for prefabricated box girder reinforcement framework

Abstract

The application relates to the technical field of construction, and discloses a precast box girder reinforcement cage anti-deformation lifting appliance, which comprises a reinforcement cage, lifting appliance assemblies are arranged at the two ends of the reinforcement cage, the lifting appliance assemblies comprise a buffer frame, first sliding rods are fixedly installed on the two sides of the buffer frame, first springs are sleeved on the outer surfaces of the first sliding rods, fixed blocks are fixedly installed on the upper surface of the reinforcement cage, threaded rods are threadedly connected to the two ends of the buffer frame, the lifting appliance assemblies can reduce the flexible limiting of the reinforcement cage during hoisting, so that the stress of the reinforcement cage during hoisting is relatively uniform, local reinforcement is prevented from being bent due to excessive tension, the change of the geometric size of the reinforcement cage is prevented from affecting the subsequent concrete pouring quality, the buffer mechanism can reduce the shaking range of the reinforcement cage during hoisting, the risk of collision with surrounding equipment and structure is reduced, the life safety of on-site personnel is ensured, and major safety accidents caused by the falling of the reinforcement cage are avoided.

Description

Technical Field

[0001] This application relates to the field of construction technology, and in particular to anti-deformation lifting devices for precast box girder steel reinforcement cages. Background Technology

[0002] With the booming development of transportation infrastructure construction, precast box girders have become a common component in bridge engineering due to their advantages such as convenient construction and stable quality. The steel reinforcement cage, as the "skeleton" of the precast box girder, directly determines the load-bearing capacity and service life of the box girder in terms of its integrity and precision. However, deformation has always been a persistent problem during the hoisting of the precast box girder's steel reinforcement cage. Traditional hoisting methods often use wire rope binding. Due to the complex structure and large span of the steel reinforcement cage, the force is extremely uneven during hoisting. Local steel bars are prone to bending due to excessive tension, leading to changes in the cage's geometric dimensions and affecting the quality of subsequent concrete pouring. Even with simple hoists, the lack of an effective force adjustment mechanism makes it impossible to accurately control the force on each part, and deformation is still difficult to avoid. Furthermore, the steel reinforcement cage is prone to swaying during hoisting, which makes the hoisting trajectory difficult to control, increasing the risk of collisions with surrounding equipment and structures, threatening the lives of on-site personnel, and potentially causing the cage to fall and resulting in a major safety accident. Utility Model Content

[0003] To overcome the shortcomings of uneven force distribution during hoisting, which can easily lead to bending of local steel bars due to excessive tension, resulting in changes in the geometric dimensions of the skeleton and affecting the quality of subsequent concrete pouring, even with the use of simple hoists, the lack of an effective force adjustment mechanism makes it impossible to accurately control the force on each part, and deformation is still difficult to avoid. In addition, the steel skeleton is prone to swaying during hoisting, which makes the hoisting trajectory difficult to control, increases the risk of collision with surrounding equipment and structures, threatens the lives of on-site personnel, and may also cause the skeleton to fall, causing a major safety accident. The purpose of this utility model is to provide a modular precast box girder steel reinforcement binding frame to solve the above-mentioned deficiencies.

[0004] This application provides a precast box girder reinforcement cage anti-deformation lifting device, including a reinforcement cage, with lifting device assemblies at both ends of the reinforcement cage. The lifting device assemblies include a buffer frame, with first sliding rods fixedly installed on both sides of the buffer frame. A first spring is sleeved on the outer surface of the first sliding rod. A fixing block is fixedly installed on the upper surface of the reinforcement cage. Threaded rods are threadedly connected to both ends of the buffer frame. A button is provided on the outer surface of the fixing block. An alarm is provided on the outer surface of the fixing block. A buffer mechanism is provided on the upper surface of the buffer frame. A lifting ring is fixedly installed on the upper surface of the buffer mechanism.

[0005] Furthermore, the buffer frame and the steel reinforcement frame are slidably connected, the first sliding rod and the fixed block are slidably connected, the first spring is located between the buffer frame and the fixed block, and fixed blocks are provided on both sides of the buffer frame, with the buffer frame located in the middle of the two fixed blocks.

[0006] Furthermore, the threaded rod and the button are at the same height, the button and the alarm are electrically connected, and pressing the button controls the alarm to sound.

[0007] Furthermore, the buffer mechanism includes a connecting plate, a buffer plate is fixedly installed on the lower surface of the connecting plate, a second slide rod is fixedly installed on the outer surface of the buffer plate, a second spring is sleeved on the outer surface of the second slide rod, a washer is slidably connected to the outer surface of the second slide rod, a limit ring is provided on the lower surface of the connecting plate, and a groove is opened in the inner cavity of the limit ring.

[0008] Furthermore, the second spring is located between the buffer disc and the gasket, the gasket is slidably connected to the inner wall of the limiting ring, the second slide rod is slidably connected to the slide groove, and there is a gap between the connecting disc and the limiting ring.

[0009] Furthermore, the upper surface of the connecting plate is fixedly connected to the lifting ring, the lower surface of the buffer plate is not in contact with the upper surface of the buffer frame, and the buffer frame is fixedly connected to the limiting ring.

[0010] The technical solution provided in this application has at least the following technical effects or advantages:

[0011] 1. By adopting a lifting device assembly, this invention effectively solves the problem of traditional lifting methods that often use wire rope binding. Due to the complex structure and large span of the reinforcing steel cage, the force is extremely uneven during lifting, and some local reinforcing bars are prone to bending due to excessive tension, resulting in changes in the geometric dimensions of the cage and affecting the quality of subsequent concrete pouring. Even when using some simple lifting frames, the lack of an effective force adjustment mechanism makes it impossible to accurately control the force on each part, and deformation problems are still difficult to avoid. This utility model can reduce the flexibility limitation of the reinforcing steel cage during the lifting process through the lifting device assembly, thereby making the reinforcing steel cage more evenly stressed during the lifting process, avoiding the bending of some local reinforcing bars due to excessive tension, and preventing changes in the geometric dimensions of the reinforcing steel cage from affecting the quality of subsequent concrete pouring.

[0012] 2. Due to the adoption of a buffer mechanism, the problem of swaying during the hoisting of the steel reinforcement frame is effectively solved. Swaying makes the hoisting trajectory difficult to control, increases the risk of collision with surrounding equipment and structures, threatens the lives of on-site personnel, and may also cause the frame to fall, resulting in a major safety accident. This utility model can reduce the swaying amplitude of the steel reinforcement frame during hoisting through the buffer mechanism, reduce the risk of collision with surrounding equipment and structures, ensure the lives of on-site personnel, and avoid the frame falling and causing a major safety accident. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure in the embodiments of this application;

[0014] Figure 2 This is a schematic diagram of the lifting device assembly structure in an embodiment of this application;

[0015] Figure 3 This is a schematic diagram of the buffer frame structure in the embodiments of this application;

[0016] Figure 4 This is a schematic diagram of the buffer mechanism structure in the embodiments of this application;

[0017] In the diagram: 1. Steel reinforcement frame; 2. Lifting device assembly; 21. Buffer frame; 22. First slide rod; 23. First spring; 24. Fixing block; 25. Threaded rod; 26. Button; 27. Alarm; 28. Buffer mechanism; 281. Connecting plate; 282. Buffer plate; 283. Second slide rod; 284. Second spring; 285. Shim; 286. Limiting ring; 287. Slide groove; 29. ​​Lifting ring. Detailed Implementation

[0018] For situations where the force is extremely uneven during hoisting, this invention can reduce the flexible limitation on the steel reinforcement cage during hoisting through the hoisting tool assembly, thereby making the force on the steel reinforcement cage relatively uniform during hoisting and avoiding local steel bars from bending due to excessive tension. For situations where swaying is likely to occur during hoisting, this invention can reduce the swaying amplitude of the steel reinforcement cage through the buffer mechanism, reducing the risk of collision with surrounding equipment and structures.

[0019] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0020] Example

[0021] Please see Figure 1 As shown, the precast box girder steel reinforcement cage anti-deformation lifting device includes a steel reinforcement cage 1, and lifting device assemblies 2 are provided at both ends of the steel reinforcement cage 1. The lifting device assemblies 2 are used to lift the steel reinforcement cage 1.

[0022] Please see Figure 2 and Figure 3As shown, the lifting device assembly 2 includes a buffer frame 21. First slide rods 22 are fixedly installed on both sides of the buffer frame 21. A first spring 23 is sleeved on the outer surface of the first slide rods 22. A fixing block 24 is fixedly installed on the upper surface of the reinforcing steel frame 1. Threaded rods 25 are threadedly connected to both ends of the buffer frame 21. A button 26 and an alarm 27 are provided on the outer surface of the fixing block 24. A buffer mechanism 28 is provided on the upper surface of the buffer frame 21. A lifting ring 29 is fixedly installed on the upper surface of the buffer mechanism 28. The buffer frame 21 and the reinforcing steel frame 1 are slidably connected. The first slide rods 22 and the fixing blocks 24 are slidably connected. The first spring 23 is located between the buffer frame 21 and the fixing blocks 24. Fixing blocks 24 are provided on both sides of the buffer frame 21, and the buffer frame 21 is located in the middle of the two fixing blocks 24. The threaded rods 25 and the button 26 are at the same height. The button 26 and the alarm 27 are electrically connected, and pressing the button 26 controls the alarm 27 to sound an alarm. During the hoisting of the steel reinforcement cage 1, the rigid connection will cause the steel reinforcement cage 1 to be subjected to extremely uneven force. Local steel bars are prone to bending due to excessive tension, resulting in changes in the geometric dimensions of the cage. Therefore, the buffer frame 21 is flexibly limited by the fixing block 24. During the hoisting process, the lifting ring 29 is connected by the hook to drive the buffer mechanism 28 to move. The buffer mechanism 28 can be used to buffer the shaking generated during the hoisting process. When the force on the lifting ring 29 is uneven, it will drive the buffer frame 21 to slide on the outer surface of the steel reinforcement cage 1. At this time, the buffer frame 21 will drive the first sliding rod 22 to slide in the inner cavity of the fixing block 24 and compress the first spring 23. When the movement amplitude is too large, the threaded rod 25 will compress the button 26, causing the alarm 27 to sound an alarm, reminding the staff to maintain it in time and prevent the steel reinforcement cage 1 from deforming. The distance between the threaded rod 25 and the button 26 can be changed by rotating the position of the threaded rod 25 in the inner cavity of the buffer frame 21, thereby changing the alarm spacing, which can be adjusted according to needs.

[0023] Please see Figure 2 and Figure 4As shown, the buffer mechanism 28 includes a connecting plate 281, a buffer plate 282 fixedly mounted on the lower surface of the connecting plate 281, a second slide rod 283 fixedly mounted on the outer surface of the buffer plate 282, a second spring 284 sleeved on the outer surface of the second slide rod 283, and a washer 285 slidably connected to the outer surface of the second slide rod 283. A limit ring 286 is provided on the lower surface of the connecting plate 281, and a groove 287 is formed in the inner cavity of the limit ring 286. The second spring 284 is located between the buffer plate 282 and the washer 285. The washer 285 is slidably connected to the inner wall of the limit ring 286 to prevent the second spring 284 from rubbing against the inner wall of the limit ring 286. The second slide rod 283 is slidably connected to the groove 287. There is a gap between the connecting plate 281 and the limit ring 286, so that the connecting plate 281 can move in multiple directions above the limit ring 286. The upper surface of 81 is fixedly connected to the lifting ring 29, and the lower surface of the buffer plate 282 does not contact the upper surface of the buffer frame 21. In this way, the buffer plate 282 can float in multiple directions within the inner cavity of the limiting ring 286. The buffer frame 21 and the limiting ring 286 are fixedly connected. When swaying occurs during hoisting, the lifting ring 29 drives the connecting plate 281 to sway. The swaying of the connecting plate 281 drives the buffer plate 282 to sway. The swaying of the buffer plate 282 drives the second slide rod 283 to slide within the inner cavity of the slide groove 287 and compress the second spring 284. At this time, the elastic force of the second spring 284 reduces the swaying amplitude of the buffer plate 282, thereby reducing the swaying amplitude of the buffer frame 21. Therefore, during hoisting, the swaying amplitude of the steel frame 1 can be reduced, reducing the risk of collision with surrounding equipment and structures, ensuring the safety of on-site personnel, and preventing the frame from falling and causing a major safety accident.

[0024] In summary, the lifting assembly 2 is used to lift the reinforcing steel cage 1. During the lifting process, the rigid connection will cause the reinforcing steel cage 1 to be subjected to extremely uneven forces. Local reinforcing bars are prone to bending due to excessive tension, resulting in changes in the geometric dimensions of the cage. Therefore, the buffer frame 21 is flexibly limited by the fixing block 24. During the lifting process, the lifting ring 29 is connected by the hook to drive the buffer mechanism 28 to move. The buffer mechanism 28 can be used to buffer the swaying generated during the lifting process. When the force on the lifting ring 29 is uneven, it will drive the buffer frame 21 to slide on the outer surface of the reinforcing steel cage 1. At this time, the buffer frame 21 will drive the first sliding rod 22 to move inside the fixing block 24. The cavity slides and compresses the first spring 23. When the movement is too large, the threaded rod 25 compresses the button 26, causing the alarm 27 to sound. When shaking occurs during hoisting, the lifting ring 29 drives the connecting plate 281 to shake. The shaking of the connecting plate 281 causes the buffer plate 282 to shake. The shaking of the buffer plate 282 causes the second slide rod 283 to slide in the inner cavity of the slide groove 287 and compress the second spring 284. At this time, the elastic force of the second spring 284 reduces the shaking amplitude of the buffer plate 282, thereby reducing the shaking amplitude of the buffer frame 21. Therefore, the shaking amplitude of the steel frame 1 can be reduced during hoisting.

[0025] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0026] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. A precast box girder reinforcement cage anti-deformation lifting device, comprising a reinforcement cage (1), characterized in that, The steel reinforcement cage (1) is provided with lifting assemblies (2) at both ends; The lifting device assembly (2) includes a buffer frame (21), with first slide rods (22) fixedly installed on both sides of the buffer frame (21). A first spring (23) is sleeved on the outer surface of the first slide rods (22). A fixing block (24) is fixedly installed on the upper surface of the steel frame (1). Threaded rods (25) are threaded to both ends of the buffer frame (21). A button (26) is provided on the outer surface of the fixing block (24). An alarm (27) is provided on the outer surface of the fixing block (24). A buffer mechanism (28) is provided on the upper surface of the buffer frame (21). A lifting ring (29) is fixedly installed on the upper surface of the buffer mechanism (28).

2. The anti-deformation lifting device for the precast box girder steel reinforcement cage as described in claim 1, characterized in that, The buffer frame (21) and the steel reinforcement frame (1) are slidably connected. The first slide rod (22) and the fixing block (24) are slidably connected. The first spring (23) is located between the buffer frame (21) and the fixing block (24). Fixing blocks (24) are provided on both sides of the buffer frame (21), and the buffer frame (21) is located in the middle of the two fixing blocks (24).

3. The anti-deformation lifting device for the precast box girder steel reinforcement cage as described in claim 1, characterized in that, The threaded rod (25) and the button (26) are at the same height. The button (26) and the alarm (27) are electrically connected, and pressing the button (26) controls the alarm (27) to sound an alarm.

4. The anti-deformation lifting device for the precast box girder steel reinforcement cage as described in claim 1, characterized in that, The buffer mechanism (28) includes a connecting plate (281), a buffer plate (282) is fixedly installed on the lower surface of the connecting plate (281), a second slide rod (283) is fixedly installed on the outer surface of the buffer plate (282), a second spring (284) is sleeved on the outer surface of the second slide rod (283), a gasket (285) is slidably connected to the outer surface of the second slide rod (283), a limit ring (286) is provided on the lower surface of the connecting plate (281), and a groove (287) is opened in the inner cavity of the limit ring (286).

5. The anti-deformation lifting device for the precast box girder steel reinforcement cage as described in claim 4, characterized in that, The second spring (284) is located between the buffer plate (282) and the pad (285), the pad (285) and the inner wall of the limiting ring (286) are slidably connected, the second slide rod (283) and the slide groove (287) are slidably connected, and the connecting plate (281) and the limiting ring (286) have a gap.

6. The anti-deformation lifting device for the precast box girder steel reinforcement cage as described in claim 5, characterized in that, The upper surface of the connecting plate (281) is fixedly connected to the lifting ring (29), the lower surface of the buffer plate (282) is not in contact with the upper surface of the buffer frame (21), and the buffer frame (21) is fixedly connected to the limiting ring (286).

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