A steel cage hoisting and lowering device for extra-large offshore pile foundations

Abstract

This utility model discloses a rebar cage hoisting and lowering device for extra-large offshore pile foundations, relating to the field of rebar cage lowering technology. It includes a fixed base and a fixed plate, which is raised and lowered by a lifting mechanism. A fixing mechanism is fixedly installed on the top of the fixed plate, including a stepper motor. The output shaft of one end of the stepper motor is driven by a lead screw via a central transmission box. A threaded sleeve is threadedly connected to the outer wall of the lead screw, and a moving plate is fixedly installed at the bottom of the threaded sleeve. A limiting groove for sliding the moving plate is opened inside the fixed plate, and a clamping plate is fixedly installed at the bottom of the moving plate. A reinforcing component is installed on the outer wall of the moving plate near the clamping plate. This utility model achieves effective fixing of the extra-large rebar cage by driving three lead screws through a stepper motor in the fixing mechanism, realizing single-point drive synchronous control of multiple fixed points through mechanical linkage, thus ensuring the stability of the extra-large rebar cage during offshore hoisting and lowering.

Description

Technical Field

[0001] This utility model relates to the field of steel cage lowering technology, specifically a steel cage hoisting and lowering device for extra-large marine pile foundations. Background Technology

[0002] With the rapid development of my country's marine economy, the construction scale of major projects such as cross-sea bridges, offshore wind power, and deep-water ports is expanding daily. The foundations of these projects often utilize ultra-large diameter and ultra-long bored piles, making the preparation and installation of their core structure—the extra-large steel cage—a crucial process. A current type of safe hoisting and lowering device for rebar cages, as described in patent CN220376261U, comprises: a support frame mounted on external equipment; a lifting mechanism and a lubrication mechanism mounted on the support frame; the lifting mechanism including a hydraulic cylinder, a lifting frame, a horizontal bar, an extension plate, a fixing frame, a cylinder, a snap-fit ​​plate, a bonding plate, and a fixing column; two hydraulic cylinders are provided, with their ends rotatably connected to the support frame and the horizontal bar, respectively; during the hoisting of the rebar cage, because there are multiple notches on the rebar cage, the fixing column can be inserted into the rebar cage to fix it; then, the hydraulic cylinder drives the lifting and lowering of the rebar cage, thereby moving the rebar cage to the corresponding position, thus improving the effectiveness of use, avoiding swaying of the rebar cage, and improving the stability of use.

[0003] Regarding the aforementioned technologies, the applicant discovered that a single-point fixing method driven by a hydraulic cylinder, used in the operation of a rebar cage safety hoisting and lowering device, lacks multi-directional constraint capability for the rebar cage. Furthermore, in rough seas at sea, this single-point fixing method is prone to structural swaying, affecting the final lowering and installation of the rebar cage. Therefore, we propose a rebar cage hoisting and lowering device for extra-large offshore pile foundations. Utility Model Content

[0004] The purpose of this invention is to provide a steel cage hoisting and lowering device for extra-large marine pile foundations, which can solve the problem of poor stability of steel cages in windy and wave environments when fixed at a single point.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steel cage hoisting and lowering device for extra-large offshore pile foundations, comprising a fixed base and a fixed plate. The fixed plate is raised and lowered by a lifting mechanism. A fixing mechanism is fixedly installed on the top of the fixed plate. The fixing mechanism includes a stepper motor. The output shaft of one end of the stepper motor is driven and connected to a lead screw through a central transmission box. A threaded sleeve is threadedly connected to the outer wall of the lead screw. A movable plate is fixedly installed at the bottom of the threaded sleeve. A limiting groove for sliding of the movable plate is opened inside the fixed plate. A clamping plate is fixedly installed at the bottom of the movable plate. A reinforcing component is installed on the outer wall of the movable plate near the clamping plate.

[0006] By adopting the above technical solutions, the stability of the steel cage during hoisting and lowering can be improved.

[0007] Preferably, the lifting mechanism includes a fixed frame, and hydraulic cylinders are fixedly installed at both ends of the top wall of the fixed frame, and a movable frame is fixedly installed at the telescopic end of the hydraulic cylinders.

[0008] By adopting the above technical solution, it is possible to hoist and lower the steel cage.

[0009] Preferably, there are three lead screws, which are distributed at 120-degree intervals.

[0010] By adopting the above technical solution, the steel cage can be fixed at different positions.

[0011] Preferably, the reinforcing component includes a pressure plate, a limiting plate is fixedly provided at one end of the pressure plate, a hidden groove is provided inside the movable plate for the limiting plate to slide, an adjusting plate is slidably connected to the bottom of the hidden groove, the adjusting plate and the hidden groove are interference fit, and a strong spring is elastically connected between the adjusting plate and the limiting plate.

[0012] By adopting the above technical solutions, the steel cage can be further reinforced.

[0013] Preferably, the cross-section of the adjusting plate is T-shaped, and the outer side wall of the movable plate is provided with a limiting groove for the adjusting plate to slide.

[0014] By adopting the above technical solution, the movement of the adjustment plate can be limited.

[0015] Preferably, one end of the adjusting plate is threadedly connected to a threaded rod, the threaded rod is rotatably connected to the moving plate, and a handwheel is fixedly installed at the bottom of the threaded rod.

[0016] By adopting the above technical solution, the elastic potential energy of a powerful spring can be adjusted.

[0017] Compared with the prior art, the beneficial effects of this utility model are: Firstly, by setting up a fixing plate and a fixing mechanism, and by using a stepper motor in the fixing mechanism to drive three lead screws, the mechanical linkage of multiple fixing points is achieved through single-point drive synchronous control, thereby realizing the effective fixing of the extra-large steel cage and ensuring the stability of the extra-large steel cage during offshore hoisting and lowering.

[0018] Secondly, by setting up a fixing mechanism and a reinforcing component, and by the contact between the pressure plate in the reinforcing component and the top of the extra-large steel cage, the handwheel drives the threaded rod, which realizes the adaptive adjustment of the fixing effect of the pressure plate on the extra-large steel cage. This improves the stability of the extra-large steel cage during fixing and also expands the applicability of the device during use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the fixing plate and fixing mechanism of this utility model; Figure 3 This is a schematic diagram of the fixing mechanism of this utility model; Figure 4 This is a schematic diagram of the reinforcement component structure of this utility model.

[0020] In the diagram: 1. Fixed base; 101. Fixed plate; 2. Lifting mechanism; 201. Fixed frame; 202. Hydraulic cylinder; 203. Moving frame; 3. Fixed mechanism; 301. Stepper motor; 302. Central transmission box; 303. Lead screw; 304. Threaded sleeve; 305. Moving plate; 3051. Limiting groove; 306. Clamping plate; 4. Reinforcing components; 401. Pressure plate; 402. Limiting plate; 4021. Hidden groove; 403. Adjusting plate; 4031. Limiting groove; 404. Strong spring; 405. Threaded rod; 4051. Handwheel. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below.

[0026] Please see Figures 1-3The diagram shows a rebar cage hoisting and lowering device for an extra-large offshore pile foundation, comprising a fixed base 1 and a fixed plate 101. The fixed base 1 is installed on an external device. The fixed plate 101 is raised and lowered by a lifting mechanism 2, which includes a fixed frame 201 fixedly connected to the fixed base 1. Hydraulic cylinders 202 are fixedly installed at both ends of the top wall of the fixed frame 201. A movable frame 203 is fixedly installed at the telescopic end of the hydraulic cylinders 202 and fixedly connected to the fixed plate 101. A fixing mechanism 3 is fixedly installed on the top of the fixed plate 101. The fixing mechanism 3 includes a stepper motor 301, and the output shaft of one end of the stepper motor 301 is driven by a central transmission. The transmission box 302 is connected to a lead screw 303. The stepper motor 301 is fixedly installed on the top of the central transmission box 302. The central transmission box 302 is fixedly connected to the fixed plate 101. The central transmission box 302 and the lead screw 303 are connected by a bevel gear. There are three lead screws 303, which are distributed at 120-degree intervals. The outer wall of the lead screw 303 is threaded with a threaded sleeve 304. The bottom of the threaded sleeve 304 contacts the top of the fixed plate 101. A movable plate 305 is fixedly installed at the bottom of the threaded sleeve 304. A limiting groove 3051 for sliding the movable plate 305 is opened inside the fixed plate 101. A clamping plate 306 is fixedly installed at the bottom of the movable plate 305. During the hoisting and lowering of the rebar cage, the extra-large rebar cage is placed at the bottom of the fixing plate 101 and between the three clamping plates 306. Then, the stepper motor 301 is started. Driven by the stepper motor 301 and the bevel gear, the three lead screws 303 are driven to rotate synchronously inside the threaded sleeve 304. This causes the moving plate 305 and the clamping plates 306 to move towards the position of the extra-large rebar cage under the limit of the limiting groove 3051. Since there are multiple notches on the extra-large rebar cage, the notches of the clamping plates 306 can be inserted into the notches of the extra-large rebar cage to fix it. Then, by starting the hydraulic cylinder 202 in the lifting mechanism 2, the moving frame 203, the fixing plate 101, the fixing mechanism 3, and the rebar cage are raised and lowered in sequence. Then, the stepper motor 301 in the fixing mechanism 3 drives the three lead screws 303 to achieve single-point drive synchronous control of the mechanical linkage of multiple fixed points, thereby achieving effective fixation of the extra-large rebar cage and ensuring the stability of the extra-large rebar cage during hoisting and lowering at sea.

[0027] Please see Figures 2-4In the figure, a reinforcing component 4 is installed on the outer wall of the movable plate 305 near the clamping plate 306. The reinforcing component 4 includes a pressure plate 401. One end of the pressure plate 401 is inclined downward. A limiting plate 402 is fixedly installed on one end of the pressure plate 401. The limiting plate 402 has a T-shaped cross section. A hidden groove 4021 for the limiting plate 402 to slide is opened inside the movable plate 305. An adjusting plate 403 is slidably connected to the bottom of the hidden groove 4021. The adjusting plate 403 and the hidden groove 4021 are interference fit. The adjusting plate 403 has a T-shaped cross section. A limiting groove 4031 for the adjusting plate 403 to slide is opened on the outer wall of the movable plate 305. A strong spring 404 is elastically connected between the adjusting plate 403 and the limiting plate 402. A threaded rod 405 is threadedly connected to one end of the adjusting plate 403. The threaded rod 405 is rotatably connected to the movable plate 305. A handwheel 4051 is fixedly installed at the bottom of the threaded rod 405. As the moving plate 305 and clamping plate 306 approach the extra-large steel cage, the top of the extra-large steel cage comes into contact with the inclined surface of one end of the pressure plate 401. As the moving plate 305 and clamping plate 306 gradually approach, the pressure plate 401 is abutted by the extra-large steel cage, automatically driving the limiting plate 402 to rise inside the concealed groove 4021 and stretching the strong spring 404. Until the fixing mechanism 3 completes the fixing of the extra-large steel cage, the pressure plate 401 synchronously abuts against the top of the extra-large steel cage under the elastic potential energy of the strong spring 404, and the fixing force of the pressure plate 401 is required. During adjustment, rotating the handwheel 4051 drives the threaded rod 405 to rotate inside the adjusting plate 403. This causes the adjusting plate 403 to move away from the position of the strong spring 404 under the limit of the limiting groove 4031, stretching the strong spring 404. Then, through the contact between the pressure plate 401 in the reinforcing component 4 and the top of the extra-large steel cage, and driven by the handwheel 4051 on the threaded rod 405, the pressure plate 401 can adaptively adjust the fixing effect of the extra-large steel cage. This improves the stability of the extra-large steel cage during fixing and also expands the applicability of the device during use.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0029] Furthermore, the structures not described in this utility model do not involve the design points and improvement directions of this utility model and all adopt existing technology. The above content falls within the scope of the inventor's technical knowledge. Since the technical content in this field is vast and complex, the above content of this application does not necessarily constitute prior art.

[0030] 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 rebar cage hoisting and lowering device for extra-large offshore pile foundations, characterized in that: The device includes a fixed base (1) and a fixed plate (101). The fixed plate (101) is raised and lowered by a lifting mechanism (2). A fixed mechanism (3) is fixedly installed on the top of the fixed plate (101). The fixed mechanism (3) includes a stepper motor (301). The output shaft of one end of the stepper motor (301) is connected to a lead screw (303) through a central transmission box (302). A threaded sleeve (304) is threadedly connected to the outer wall of the lead screw (303). A movable plate (305) is fixedly installed at the bottom of the threaded sleeve (304). A limiting groove (3051) for sliding of the movable plate (305) is opened inside the fixed plate (101). A clamping plate (306) is fixedly installed at the bottom of the movable plate (305). A reinforcing component (4) is installed on the side of the outer wall of the movable plate (305) near the clamping plate (306).

2. The steel cage hoisting and lowering equipment for extra-large offshore pile foundations according to claim 1, characterized in that: The lifting mechanism (2) includes a fixed frame (201), and hydraulic cylinders (202) are fixedly installed at both ends of the top wall of the fixed frame (201). A movable frame (203) is fixedly installed at the telescopic end of the hydraulic cylinder (202).

3. The steel cage hoisting and lowering equipment for extra-large offshore pile foundations according to claim 1, characterized in that: There are three lead screws (303), and the three lead screws (303) are distributed at 120-degree intervals.

4. The steel cage hoisting and lowering equipment for extra-large offshore pile foundations according to claim 1, characterized in that: The reinforcing component (4) includes a pressure plate (401), one end of which is fixedly provided with a limiting plate (402). The interior of the movable plate (305) is provided with a hidden groove (4021) for the limiting plate (402) to slide. An adjusting plate (403) is slidably connected to the bottom of the hidden groove (4021). The adjusting plate (403) and the hidden groove (4021) are interference-fitted. A strong spring (404) is elastically connected between the adjusting plate (403) and the limiting plate (402).

5. The steel cage hoisting and lowering equipment for extra-large offshore pile foundations according to claim 4, characterized in that: The cross-section of the adjusting plate (403) is T-shaped, and the outer side wall of the moving plate (305) is provided with a limiting groove (4031) for the adjusting plate (403) to slide.

6. The steel cage hoisting and lowering equipment for extra-large offshore pile foundations according to claim 4, characterized in that: One end of the adjusting plate (403) is threadedly connected to a threaded rod (405), the threaded rod (405) is rotatably connected to the moving plate (305), and a handwheel (4051) is fixedly installed at the bottom of the threaded rod (405).

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