A device for limiting the lowering of a reinforcement cage for a pile foundation with a bearing platform

Abstract

The application discloses a reinforcing cage lowering and limiting device for pile cap pile foundation construction, which comprises a steel casing, a plurality of limiting arc-shaped plates are arranged on the inner side of the steel casing, the plurality of limiting arc-shaped plates are equidistantly arranged in a ring shape in the steel casing, a fixing seat is arranged on one side of the limiting arc-shaped plate, the fixing seat is arranged on the inner side of the steel casing, a plurality of pushing assemblies are arranged in the fixing seat, a synchronous assembly is arranged on the top of the fixing seat, the plurality of pushing assemblies comprise: a lead screw which is rotationally connected to the inner side of the fixing seat; a movable sleeve which is sleeved and threadedly connected to the outer side of the lead screw, one end of the movable sleeve is fixedly connected with the limiting arc-shaped plate, the movable sleeve is driven to move by the lead screw, the limiting arc-shaped plate at one end of the movable sleeve moves towards the center of the circle, the fixed ring moves up and down through the meshing of the gear and the rack, the plurality of racks at the bottom of the fixed ring drive the lead screw to rotate, so that the plurality of limiting arc-shaped plates synchronously move towards the center of the circle, and the reinforcing cages with different diameters are limited.

Description

Technical Field

[0001] This application relates to the field of pile foundation construction, and in particular to a lowering limit device for a steel cage used in the construction of a pile cap foundation. Background Technology

[0002] A pile cap is a reinforced concrete platform installed at the top of the pile foundation to bear and distribute the load transmitted from the pier. It connects the tops of the piles and serves as the link between the piles and the column or pier. When constructing the pile foundation for the pile cap, the bored pile method is used. First, a steel casing is installed, then a hole is drilled with mud slurry to protect the wall. After cleaning the hole, a reinforcing cage needs to be lowered, and then underwater concrete is poured. The depth of the guide pipe is controlled. When lowering the reinforcing cage, a limiting device is required to prevent the cage from shifting during lowering.

[0003] However, during the implementation of the relevant technical solutions, at least the following technical problems were found: When lowering the rebar cage, a limiting device matching the diameter of the rebar cage is generally used and set on the steel casing to limit the lowering of the rebar cage. However, when lowering multiple rebar cages of different diameters, different limiting devices need to be prepared according to the diameter of each rebar cage, which is inconvenient to operate. Too many limiting devices will also occupy the construction site and increase the construction cost. Utility Model Content

[0004] This application provides a lowering limit device for steel cages used in pile foundation construction, which solves the problem that existing lowering limit devices cannot adapt to steel cages of various diameters, and achieves the effect of adjusting the size of the lowering limit device according to the diameter of the steel cage.

[0005] This application provides a lowering limiting device for a reinforcing cage used in the construction of a pile cap foundation, comprising a steel casing, wherein multiple limiting arc plates are provided on the inner side of the steel casing, the multiple limiting arc plates are arranged in a ring at equal intervals inside the steel casing, a fixed seat is provided on one side of each limiting arc plate, the fixed seat is located inside the steel casing, a pushing component is provided inside the multiple fixed seats to drive the limiting arc plates to move, and a synchronization component is provided on the top of the multiple fixed seats to drive the multiple limiting arc plates to move synchronously. The multiple pushing components include: a lead screw, rotatably connected to the inside of the fixed seat; and a movable sleeve, sleeved and threadedly connected to the outside of the lead screw, one end of the movable sleeve being fixedly connected to the limiting arc plate, and the movable sleeve being inserted and connected to the fixed seat.

[0006] Furthermore, limit blocks are fixedly provided at both the top and bottom of the movable sleeve, and the movable sleeve is connected to the fixed seat through the two limit blocks.

[0007] Furthermore, one of the fixed seats is provided with a drive assembly that drives one of the lead screws to rotate. The drive assembly includes: a worm gear, which is fixedly disposed on the outside of one of the lead screws; and a worm, which is meshed with one side of the worm gear.

[0008] Furthermore, the drive assembly also includes: a connecting rod, rotatably connected to the top of the steel casing, and the connecting rod being fixedly connected to the worm gear; and a rotary knob, located at the end of the connecting rod extending out of the top of the steel casing.

[0009] Furthermore, the synchronization component includes: a plurality of gears, each fixedly disposed on the outer side of the middle portion of the plurality of lead screws; a rack meshing with one side of the gears, and the rack being inserted into the top of the fixed base; and a fixing ring, fixedly disposed on the top of the plurality of racks.

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

[0011] The movable sleeve is moved by the lead screw, causing the limiting arc plate at one end of the movable sleeve to move towards the center. Through the meshing of the gear and rack, the fixed ring moves up and down, causing multiple racks at the bottom of the fixed ring to drive the lead screw to rotate. This causes multiple limiting arc plates to move synchronously towards the center, thus limiting the rebar cages of different diameters and ensuring that the rebar cage is always in the center position, making the lowering of the rebar cage more accurate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the limiting device in the embodiments of this application;

[0013] Figure 2 This is a cross-sectional structural diagram of the fixing seat in an embodiment of this application;

[0014] Figure 3 This is a schematic diagram of the structure of the synchronization component in the embodiments of this application;

[0015] In the diagram: 10. Steel casing; 20. Limiting arc plate; 30. Fixed seat; 40. Pushing assembly; 50. Drive assembly; 60. Synchronizing assembly; 41. Lead screw; 42. Movable sleeve; 43. Limiting block; 51. Worm gear; 52. Worm; 53. Connecting rod; 54. Rotary knob; 61. Gear; 62. Rack; 63. Fixed ring. Detailed Implementation

[0016] This application discloses a lowering limiting device for a steel cage used in the construction of a pile foundation. Through the meshing of the outer gear 61 of the lead screw 41 and the rack 62, when one lead screw 41 rotates, the rack 62 can drive multiple gears 61 to rotate through the fixing ring 63, thereby making multiple lead screws 41 rotate synchronously. This causes multiple limiting arc plates 20 to move towards the center, so that the multiple limiting arc plates 20 can limit steel cages of different diameters and keep the steel cage in the center position, making the lowering of the steel cage more accurate.

[0017] 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.

[0018] Please refer to Figure 1 and Figure 2 This embodiment provides a lowering limiting device for a steel reinforcement cage used in the construction of a pile cap foundation. It includes a steel casing 10, with multiple limiting arc-shaped plates 20 arranged equidistantly in a ring inside the casing 10. A fixing seat 30 is provided on one side of each limiting arc-shaped plate 20, located inside the casing 10. A pushing assembly 40 for moving the limiting arc-shaped plates 20 is located inside each fixing seat 30. A synchronizing assembly 60 for synchronously moving the limiting arc-shaped plates 20 is located on the top of each fixing seat 30. Each pushing assembly 40 includes a lead screw 41, a movable sleeve 42, and a limiting block 43. The lead screw 41 is rotatably connected to the inside of the fixing seat 30, and the movable sleeve 42 is fitted and threadedly connected to the outside of the lead screw 41. One end of the movable sleeve 42 is fixedly connected to the limiting arc plate 20. The movable sleeve 42 points to the center of the steel casing 10. The movable sleeve 42 is inserted and connected to the fixed seat 30. Two limiting blocks 43 are set at the top and bottom of the movable sleeve 42. The movable sleeve 42 is inserted and connected to the fixed seat 30 through the two limiting blocks 43. The rotation of the screw 41 inside the fixed seat 30 drives the movable sleeve 42, which is threaded to it, to move accordingly. The limiting blocks 43 at the top and bottom of the movable sleeve 42 limit the movable sleeve 42, so that the limiting blocks 43 will not rotate with the screw 41. This allows the movable sleeve 42 to move towards the center with the rotation of the screw 41, thereby changing the distance from the limiting arc plate 20 to the center. This allows the limiting arc plate 20 to limit the outer side of steel cages of different diameters.

[0019] Please refer to Figure 1 , Figure 2 and Figure 3One of the fixed seats 30 has a drive assembly 50 inside that drives one of the lead screws 41 to rotate. The drive assembly 50 includes a worm gear 51, a worm 52, a connecting rod 53, and a rotary knob 54. The worm gear 51 is fixedly installed on the outside of one of the lead screws 41. The worm 52 is meshed with one side of the worm gear 51. The connecting rod 53 is rotatably connected to the top of the steel casing 10 and is fixedly connected to the worm 52. The rotary knob 54 is located at the end of the connecting rod 53 that extends out of the top of the steel casing 10. By manually rotating the rotary knob 54, the rotary knob 54 drives the connecting rod 53 and the worm 52 to rotate. With the worm 52 meshing with the worm gear 51, the worm gear 51 drives the lead screw 41 to rotate, providing power for the movement of the limiting arc plate 20. The self-locking of the worm gear 51 and the worm 52 also prevents the limiting arc plate 20 from moving arbitrarily due to collisions with the steel cage, making the lowering process of the steel cage more accurate.

[0020] Please refer to Figure 1 , Figure 2 and Figure 3 The synchronization component 60 includes gears 61, racks 62, and a retaining ring 63. Multiple gears 61 are fixedly mounted on the outer sides of the middle sections of multiple lead screws 41. Racks 62 are meshed with one side of the gears 61 and are inserted into the top of the fixed base 30. The retaining ring 63 is fixedly mounted on the top of the multiple racks 62. A worm gear 51 drives the rotation of one lead screw 41, causing the outer gears 61 to rotate accordingly. This causes the gears 61 to drive the meshing racks 62 to move up and down within the fixed base 30, resulting in the racks 61... 2. The top fixing ring 63 moves up and down, thereby causing multiple racks 62 at the bottom of the fixing ring 63 to pass through multiple fixing seats 30. The synchronous up and down movement of the multiple racks 62 causes the gears 61 meshing with them to rotate, so that the gears 61 can drive the lead screw 41 to rotate, thereby causing multiple limiting arc plates 20 to move synchronously towards the center. This allows the multiple limiting arc plates 20 to limit the outer side of steel cages of different diameters. The operation is relatively simple, and it can also keep the steel cage in the center position, making the lowering of the steel cage more accurate.

[0021] The functional principle of this application can be explained through the following methods:

[0022] In use, the rebar cage is hoisted to the top of the steel casing 10. The rotary knob 54 at the top of the steel casing 10 is rotated by hand, causing the rotary knob 54 to rotate the connecting rod 53. The rotation of the connecting rod 53 causes the worm gear 52 inside the fixed seat 30 to rotate, which in turn drives the worm wheel 51 meshing with the lead screw 41 to rotate. This causes the lead screw 41 to move the outer threaded sleeve 42 towards the center. The limiting blocks 43 at the top and bottom of the sleeve 42 limit its movement, preventing it from rotating with the lead screw 41. The rotation of one lead screw 41 drives the outer gear 61 to rotate, causing the gear 61 to drive the meshing rack 62 to move up and down. The movement of the rack 62 causes the top rack 62 to move up and down, thus causing the bottom of the fixed ring 63 to... Multiple racks 62 in the part move up and down synchronously. The remaining racks 62, inserted at the top of the fixed seat 30, drive the gears 61 meshing with them inside the fixed seat 30 to rotate. This causes the multiple gears 61 to drive the lead screw 41 to rotate synchronously. This allows the movable sleeve 42, which is threaded to one end of the lead screw 41, to move the limiting arc plate 20 towards the center. This causes the multiple limiting arc plates 20 to contact the middle of the reinforcing cage on the outside. The multiple limiting arc plates 20 push the reinforcing cage to the center position, allowing the multiple limiting arc plates 20 to limit reinforcing cages of different diameters, improving the applicability of the lowering limiting device. The self-locking of the worm gear 51 and worm 52 also prevents the reinforcing cage from pushing the limiting arc plate 20 to move, preventing the reinforcing cage from tilting when it moves down, and making the lowering process of the reinforcing cage more accurate.

[0023] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

[0024] 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 lowering limiting device for a reinforcing cage used in the construction of a pile cap foundation, comprising a steel casing (10), characterized in that, The inner side of the steel casing (10) is provided with a plurality of limiting arc plates (20), which are arranged in a ring at equal intervals inside the steel casing (10). A fixing seat (30) is provided on one side of each limiting arc plate (20), which is located inside the steel casing (10). A pushing component (40) is provided inside each fixing seat (30) to drive the limiting arc plates (20) to move. A synchronizing component (60) is provided on the top of each fixing seat (30) to drive the limiting arc plates (20) to move synchronously. The pushing component (40) includes: The lead screw (41) is rotatably connected to the inside of the fixed base (30); The movable sleeve (42) is sleeved and threaded to the outside of the lead screw (41). One end of the movable sleeve (42) is fixedly connected to the limiting arc plate (20), and the movable sleeve (42) is inserted into the fixed seat (30).

2. The lowering limiting device for a reinforcing cage used in the construction of a pile cap foundation as described in claim 1, characterized in that, The top and bottom of the movable sleeve (42) are fixedly provided with limiting blocks (43), and the movable sleeve (42) is connected to the fixed seat (30) through the two limiting blocks (43).

3. The lowering limiting device for a reinforcing cage used in the construction of a pile foundation as described in claim 1, characterized in that, One of the fixed bases (30) is internally provided with a drive assembly (50) for rotating one of the lead screws (41), the drive assembly (50) comprising: A worm gear (51) is fixedly disposed on the outside of one of the lead screws (41); The worm (52) is meshed with one side of the worm wheel (51).

4. The lowering limiting device for a reinforcing cage used in the construction of a pile cap foundation as described in claim 3, characterized in that, The drive component (50) further includes: The connecting rod (53) is rotatably connected to the top of the steel casing (10), and the connecting rod (53) is fixedly connected to the worm gear (52); A rotary knob (54) is located at one end of the connecting rod (53) that extends out of the top of the steel casing (10).

5. The lowering limiting device for a reinforcing cage used in the construction of a pile cap foundation as described in claim 1, characterized in that, The synchronization component (60) includes: Multiple gears (61) are respectively fixedly disposed on the outer side of the middle part of multiple lead screws (41); A rack (62) is meshed with one side of the gear (61), and the rack (62) is inserted into the top of the fixed base (30); A retaining ring (63) is fixedly disposed on the top of the plurality of racks (62).

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