A positioning and fixing device for a reinforcement cage of a cast-in-place pile

Abstract

The utility model relates to reinforcing cage technical field, and disclose a kind of positioning and fixing device for cast-in-place pile reinforcing cage, including circular mounting disc, the central position of mounting disc is equipped with through-hole, the inside of mounting disc is provided with annular groove, several gear wheels are rotatably connected in the annular groove, several support rods are transversely passed in the mounting disc, the end above of support rod near the through-hole is equipped with limit slot, the side wall of support rod is fixedly connected with rack, the gear wheel is engaged with the rack, the outer ring side wall of annular groove is rotatably connected with gear ring, the gear ring is engaged with the gear wheel. The utility model mainly solves the problem that the stability of existing device is poor when fixing reinforcing cage, and deviation phenomenon can easily occur, and the positioning requirement of high-precision reinforcing cage cannot be realized.

Description

Technical Field

[0001] This utility model relates to the field of steel cage technology, specifically to a positioning and fixing device for steel cages in cast-in-place piles. Background Technology

[0002] A cast-in-place pile reinforcement cage refers to a structure where a pre-fabricated reinforcement cage is placed into a pile hole after machine punching or water-jet drilling, and then a guide pipe is inserted for concrete pouring. It is typically a cage-shaped structure made of tied reinforcing bars and can be prefabricated as an important component of the pile foundation structure. With continuous social development and progress, many construction projects now use extra-long cast-in-place piles. To enhance the strength of the pile foundation, reinforcement cages are added inside the pile. When installing the reinforcement cage in sections, the current method is to use double single-bar supports to suspend and fix the lowered reinforcement cage.

[0003] Chinese Patent 202422249607.5 discloses "A Temporary Fixing Platform for Installing Reinforcing Cages of Cast-in-Place Piles" (Publication No. CN223017634U). The technical solution disclosed in this patent document is as follows: it includes a fixing ring and symmetrically arranged adjustable lugs. The fixing ring is a base welded from structural steel. The adjustable lugs include a positioning steel plate, a limiting steel plate, and a pull-out steel plate. The positioning steel plate is vertically fixed to the outside of the fixing ring, and a long groove is cut in the lower middle part of the positioning steel plate. One end of the pull-out steel plate passes through the long groove. The two limiting steel plates are fixed to the outside of the pull-out steel plate, and a limiting groove is cut above the front end of the pull-out steel plate. This patent can quickly temporarily fix the reinforcing cage, but it has the following problems: the pull-out steel plate in this device is prone to moving back and forth when fixing the reinforcing cage, resulting in poor stability. Furthermore, the pull-out steel plate of this device needs to be adjusted in position sequentially, which is inefficient and prone to misalignment, making it impossible to achieve the high-precision positioning requirement of the reinforcing cage. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a positioning and fixing device for cast-in-place pile reinforcement cages. It mainly solves the problems that existing devices have poor stability when fixing reinforcement cages and are prone to deviation, thus failing to meet the high-precision positioning requirements of reinforcement cages.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a positioning and fixing device for a cast-in-place pile reinforcement cage, comprising a circular mounting plate, a through hole at the center of the mounting plate, an annular groove inside the mounting plate, several gears rotatably connected in the annular groove, several support rods passing laterally through the mounting plate, a limiting groove being formed above the end of each support rod near the through hole, a rack being fixedly connected to the side wall of each support rod, the gears meshing with the racks, and a gear ring rotatably connected to the outer side wall of the annular groove, the gear ring meshing with the gears.

[0006] By adopting the above structural design, the support rod can be moved synchronously and precisely through gear and rack transmission, avoiding the misalignment problem caused by traditional manual adjustment and ensuring the high precision requirement of the rebar cage positioning.

[0007] Preferably, a snap-fit ​​strip is fixedly connected to the lower end of the support rod. The snap-fit ​​strip is the same length as the support rod and is embedded in the mounting plate and can slide within the mounting plate.

[0008] The above structural design utilizes a sliding fit between the snap-fit ​​strip and the mounting plate to create a physical limit, preventing the support rod from detaching from the mounting plate during adjustment or load-bearing, thus enhancing safety. The snap-fit ​​strip provides additional support points, constraining the axial movement of the support rod and ensuring that it remains in a stable position throughout the installation of the reinforcing cage, preventing displacement due to vibration or load.

[0009] Preferably, a movable groove is provided on the outer wall of the mounting plate, and a lever is provided in the movable groove, one end of which is fixedly connected to the gear ring.

[0010] By adopting the above structural design, the gear ring is driven to rotate by the lever, which in turn drives all gears and racks to move synchronously, so as to realize the simultaneous expansion or contraction of the support rod, reducing the step of manual adjustment one by one and improving construction efficiency.

[0011] Preferably, the mounting plate, through hole, and annular groove are arranged in concentric circles with the same center as the reference.

[0012] The above structural design allows the device to adapt to steel cages of different diameters. By aligning the center during installation, it ensures precise alignment between the steel cage and the hole of the cast-in-place pile, meeting the requirements of high-precision construction.

[0013] Preferably, there are four gears arranged in an array around the center of the mounting plate, and the number and position of the support rods correspond to those of the gears.

[0014] With the above structural design, the four gears are arranged in an array, so that the support rods are evenly distributed in the circumferential direction, ensuring that the steel cage is subjected to uniform force in all directions.

[0015] Compared with the prior art, this utility model provides a hoisting device suitable for wave piles, which has the following beneficial effects:

[0016] The device drives the gear ring to rotate via a lever, which in turn drives all gears and racks to move synchronously, enabling the support rods to expand or contract simultaneously. This reduces the need for manual adjustments and improves construction efficiency. The gear and rack transmission ensures synchronous and precise movement of the support rods, avoiding misalignment issues caused by traditional manual adjustments and guaranteeing the high-precision positioning of the rebar cage. Through center-aligned installation, this device is adaptable to rebar cages of different diameters, enhancing its versatility. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the annular groove of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the installation disk of this utility model. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-3 This utility model provides a positioning and fixing device for a reinforcing cage of a cast-in-place pile, including a circular mounting plate 1. A through hole 2 is formed at the center of the mounting plate 1. An annular groove 4 is formed inside the mounting plate 1. The mounting plate 1, through hole 2, and annular groove 4 are concentrically distributed with the same center as a reference. Four gears 5 are rotatably connected within the annular groove 4, and the gears 5 are arranged in an array with respect to the center of the mounting plate 1. Four support rods 3 pass laterally through the mounting plate 1, and the positions of the support rods 3 and gears 5 correspond to those of the gears 5. A limiting groove 302 is formed above the end of each support rod 3 near the through hole 2. A rack 7 is fixedly connected to the side wall of the support rod 3, and the gears 5 mesh with the rack 7. A gear ring 6 is rotatably connected to the outer side wall of the annular groove 4, and the gear ring 6 is rotatably connected to the mounting plate 1 via a bearing to ensure smooth rotation. The gear ring 6 meshes with the gears 5. The length of the rack 7 must cover the entire stroke of the support rod 3 to ensure effective transmission during extension and retraction.

[0022] A snap-fit ​​strip 301 is fixedly connected to the lower end of the support rod 3. The snap-fit ​​strip 301 is the same length as the support rod 3 and is embedded in the mounting plate 1 and can slide within the mounting plate 1. The snap-fit ​​strip 301 can be made of wear-resistant engineering plastic or stainless steel, and its sliding limit is achieved through a dovetail groove structure to prevent the support rod 3 from axially dislodging.

[0023] A movable groove is provided on the outer wall of the mounting plate 1, and a lever 8 is disposed in the movable groove. One end of the lever 8 is fixedly connected to the gear ring 6. The length of the lever should be convenient for manual operation, and the surface should be provided with anti-slip texture.

[0024] Working principle:

[0025] First, the operator places the mounting plate 1 above the pile hole through the through hole 2, ensuring that the center of the mounting plate 1 is aligned with the center of the pile hole. The operator manually rotates the lever 8, driving the gear ring 6 to rotate, which in turn moves the gear 5 and rack 7, retracting the support rod 3 from the through hole 2 into the mounting plate 1. The reinforcing cage is then lowered into the pile hole using a crane. After the top of the reinforcing cage is lowered to the support rod 3, the operator rotates the lever 8, causing the support rod 3 to extend under the reinforcing stirrups of the reinforcing cage. The reinforcing stirrups are then engaged in the limiting groove 302. The crane hook is then released, and the next section of the reinforcing cage is hoisted, repeating the above steps to connect the upper and lower sections. Welding can then be performed to precisely connect the two reinforcing cages. The entire reinforcing cage is then lifted upwards, while the support rod 3 is retracted. Subsequently, the reinforcing cage is lowered to the predetermined elevation, and the above steps are repeated until the entire reinforcing cage is successfully lowered. The lever 8 drives the gear ring 6 to rotate, which in turn drives all the gears 5 and racks 7 to move synchronously, enabling the support rods 3 to expand or contract simultaneously. This reduces the need for manual adjustment of each rod individually and improves construction efficiency. The gear and rack transmission system ensures synchronous and precise movement of the support rods, avoiding misalignment problems caused by traditional manual adjustments and guaranteeing the high-precision positioning of the rebar cage. This device is adaptable to rebar cages of different diameters, improving its applicability.

[0026] 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 positioning and fixing device for a reinforcing cage of a cast-in-place pile, characterized in that: The device includes a circular mounting plate (1), with a through hole (2) at the center of the mounting plate (1). An annular groove (4) is provided inside the mounting plate (1), and several gears (5) are rotatably connected inside the annular groove (4). Several support rods (3) pass through the mounting plate (1) laterally. A limit groove (302) is provided above one end of the support rod (3) near the through hole (2). A rack (7) is fixedly connected to the side wall of the support rod (3), and the gears (5) mesh with the rack (7). A gear ring (6) is rotatably connected to the outer side wall of the annular groove (4), and the gear ring (6) meshes with the gears (5).

2. The positioning and fixing device for a cast-in-place pile reinforcement cage according to claim 1, characterized in that: The lower end of the support rod (3) is fixedly connected to a snap-fit ​​strip (301). The snap-fit ​​strip (301) is the same length as the support rod (3). The snap-fit ​​strip (301) is embedded in the mounting plate (1) and can slide in the mounting plate (1).

3. The positioning and fixing device for the reinforcing cage of a cast-in-place pile according to claim 1, characterized in that: The mounting plate (1) has a movable groove on its outer side wall, and a lever (8) is provided in the movable groove. One end of the lever (8) is fixedly connected to the gear ring (6).

4. The positioning and fixing device for the reinforcing cage of a cast-in-place pile according to claim 1, characterized in that: The mounting plate (1), through hole (2) and annular groove (4) are arranged in concentric circles with the same center as the reference.

5. A positioning and fixing device for a cast-in-place pile reinforcement cage according to claim 1, characterized in that: There are four gears (5), and the gears (5) are arranged in an array with the center of the mounting plate (1). The number and position of the support rod (3) correspond to the number and position of the gears (5).

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