A pile foundation steel cage hoisting device

Abstract

The present invention provides a pile foundation steel cage hoisting device, which belongs to the field of building construction technology. Its technical solution is as follows: it includes a hollow cylinder and a clamp-shaped clamping assembly, the inner wall of the hollow cylinder is symmetrically provided with a U-shaped plate, the U-shaped plate is provided with a fixed shaft, an adjustment rod is rotatably provided on the fixed shaft, and slideways are provided on the opposite surfaces of the two adjustment rods; the upper end of the adjustment rod is provided on the upper part of the inner wall of the hollow cylinder through an adjustment spring; the clamp-shaped clamping assembly includes two clamping arms, the upper parts of the two clamping arms are connected by a limit spring, the limit spring and the adjustment spring are not subject to external force, the two clamping arms are provided in the slideway, and the clamping part formed by the two clamping arms extends out of the slideway and the clamping part is in an open state, the clamping part is provided with a groove for placing a reinforcing hoop of the steel cage, and the upper end of the clamping arm is higher than the fixed shaft; it also includes a steel wire rope for tightening the two adjustment rods. The beneficial effects of the present invention are: it can replace the existing lifting rod to hoist the steel cage, is easy to disassemble and can be reused.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a pile foundation reinforcement cage hoisting device. Background Art

[0002] During the construction of the foundation and base of a building project, it is necessary to hoist the steel cage. The hoisting of the steel cage is done by lifting the steel cage with lifting rods. The lifting rods lift the steel cage so that its bottom end is a certain distance away from the bottom of the pile. Due to the action of gravity, the steel cage naturally hangs down, thereby ensuring the verticality of the steel cage and accurately controlling the position of the steel cage within the deviation range. Generally, this part of the welded lifting rod will also become a one-time measure. The lifting rod cannot be reused, resulting in a great cost loss. In addition, there are also cases in the prior art where the lifting rod can be disassembled, such as the "Quick lifting rod for steel cage" with patent number CN201721452255 and the "A lifting rod recovery structure suitable for super-long hole pile steel cage" with patent number CN201520146288.

[0003] The aforementioned patent's principle for achieving reusable and recyclable hanger bars is essentially a rotary disassembly mechanism similar to a threaded device. However, in practice, rotary disassembly and extraction are difficult. The slenderness ratio of the steel bars used as hanger bars is too large, and the force applied to the twisting at the top of the pile hole is poorly transmitted to the rotary disassembly mechanism, making rotary disassembly difficult. Summary of the Invention

[0004] The object of the present invention is to provide a pile foundation reinforcement cage hoisting device which is easy to disassemble and reusable.

[0005] The present invention is achieved through the following measures: a pile foundation steel cage hoisting device, characterized in that it includes a hollow cylinder and a clamp-shaped clamping assembly arranged inside the hollow cylinder, a U-shaped plate is symmetrically arranged in the middle of the inner wall of the hollow cylinder, a fixed shaft is provided on the U-shaped plate, an adjustment rod is rotatably provided on the fixed shaft, the middle position of the adjustment rod is set on the fixed shaft, the axis of the fixed shaft is perpendicular to the axis of the hollow cylinder, and slideways are provided on the opposite surfaces of the two adjustment rods;

[0006] The upper end of the adjusting rod is arranged on the upper part of the inner wall of the hollow cylinder through the adjusting spring, and the adjusting rod is arranged obliquely and the upper end of the adjusting rod is close to the inner wall of the hollow cylinder;

[0007] The clamp-shaped clamping assembly includes two clamping arms arranged to rotate with each other, the upper parts of the two clamping arms are connected by a limit spring, the limit spring and the adjustment spring are not subject to external force, the two clamping arms are arranged in the slideway, and the clamping part formed by the two clamping arms extends out of the slideway and the clamping part is in an open state, the clamping part is provided with a groove capable of placing a reinforcing hoop of a steel cage, and the upper end of the clamping arm is higher than the fixed axis;

[0008] A fixing plate is provided on the upper end surface of the hollow cylinder, and a through hole is provided at the center of the fixing plate;

[0009] It also includes a steel wire rope for tightening the two adjusting rods. The steel wire rope passes through the through hole from above and is divided into two branches. The lower ends of the two branches are connected to the upper ends of the adjusting rods. The steel wire rope can be connected to the lifting device.

[0010] The maximum opening and closing angle of the clamping portion is less than 90 degrees, generally 40-70 degrees.

[0011] A locking rod is symmetrically hingedly provided on the lower part of the inner wall of the hollow cylinder, and the locking rod is fixed to the inner wall of the hollow cylinder by a tension spring. The tension spring is not subject to external force, and the outer end of the locking rod is tilted downward and contacts the clamping arm and is located above the connection between the two clamping arms;

[0012] A limiting roller is provided on the adjusting rod and located on the upper part of the two side walls of the slide, an opening is provided on the adjusting rod and located below the limiting roller, and the branch passes through the inner side of the limiting roller, the opening and the middle position of the U-shaped plate in sequence and is provided at the outer end of the locking rod.

[0013] When the steel cage moves downward, the clamp-shaped clamping assembly moves downward along the slideway under the action of the gravity of the steel cage. However, due to the presence of the locking rod, the clamp-shaped clamping assembly is prevented from moving downward. Moreover, since the clamping arm is tilted, the force on the clamping arm under the action of the locking rod becomes greater and greater, which not only limits the downward movement of the clamp-shaped clamping assembly but also further tightens the clamping part.

[0014] A guide roller is provided between the two side plates of the U-shaped plate, and the branch is located between the U-shaped plate and the guide roller.

[0015] Guide pulleys are symmetrically arranged on the lower end surface of the fixing plate, and the branches are in contact with the guide pulleys.

[0016] The fixing plate is provided with a sliding opening, the guide pulley is slidably arranged in the sliding opening through a bracket, the upper end of the bracket is provided with a screw passing through the sliding opening, the upper end of the screw extends out of the fixing plate and is fixed by a nut.

[0017] A flower basket is provided in the middle of the fixed plate, and two screw rods of the flower basket are respectively connected to the brackets of the guide pulley.

[0018] A sealing plate is provided below the hollow cylinder, and a strip-shaped opening is provided in the middle of the sealing plate for allowing the clamping portion to extend out.

[0019] The sealing plate is made up of two semicircular plates, one end of the semicircular plate away from the center of the hollow cylinder is rotated and set on the inner wall of the hollow cylinder, and the other ends of the two semicircular plates are connected in a detachable manner, which can be connected by pins or bolts, generally by bolts.

[0020] The pile foundation reinforcement cage hoisting device in the present application can be used in combination with multiple ones, and the adjusting rod and the track can be replaced by channel steel.

[0021] Working principle: the clamping part of the clamp-shaped clamping assembly is extended out of the sealing plate, and then the grooves of the two clamping parts are placed on the stiffening hoop, and then the wire rope is tightened. The lower ends of the two branches lift the outer end of the locking rod so that it presses against the clamping arm and the branches pass through the guide roller and the limit roller and converge into the through hole. Since the upper end of the adjusting rod is connected by a spring, the two branches will be tightened when passing through the through hole. Under the restriction of the limit roller, the branch pulls the adjusting rod toward the position of the through hole. At this time, the adjusting rod rotates at the position of the fixed axis and the two adjusting rods clamp the two clamping arms and compress the limit spring while approaching the middle position, so as to achieve the tightening of the clamping end and clamp it on the stiffening hoop.

[0022] After the wire rope is tightened, the two branches can be further tightened by adjusting the positions of the two guide pulleys.

[0023] When the steel cage reaches the specified position, the steel wire rope is loosened, and the two clamping arms are reset under the action of the limit spring. At this time, the clamping part is loosened and separated from the reinforcing hoop.

[0024] In order to prevent concrete from entering the interior of the hollow cylinder through the strip-shaped opening, it is best to wrap and seal it with plastic paper or tape.

[0025] Compared with the prior art, the beneficial effects of the present invention are: it can replace the existing lifting rods to lift the steel cage, is easy to disassemble and can be reused; the clamping part can be clamped by tightening the wire rope, and the position of the clamping arm can be further limited by the cooperation of the locking rod, thereby improving the safety of the entire device under the action of the gravity of the steel cage, the locking rod and the adjusting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the internal structure of the present invention;

[0028] Figure 3 For Figure 2 Schematic diagram of the structure at different angles;

[0029] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0030] Figure 5 Schematic diagram of the structure with the sealing plate open;

[0031] Figure 6 It is a structural diagram of a hollow cylinder;

[0032] Among them, the figures are marked as: 1. hollow cylinder; 2. clamp-shaped clamping assembly; 3. sealing plate; 4. wire rope; 5. U-shaped plate; 6. adjusting rod; 7. fixed plate; 8. guide pulley; 9. locking rod; 201. clamping arm; 202. limit spring; 203. clamping part; 2031. groove; 301. strip mouth; 302. semicircular plate; 401. branch; 501. guide roller; 502. fixed shaft; 601. slideway; 602. adjusting spring; 603. limit roller; 604. opening; 701. through hole; 801. bracket; 802. screw; 803. nut; 901. tension spring. DETAILED DESCRIPTION

[0033] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0034] See also Figures 1-6 A pile foundation reinforcement cage hoisting device includes a hollow cylinder 1 and a clamp-shaped clamping assembly 2 arranged inside the hollow cylinder 1. A U-shaped plate 5 is symmetrically arranged in the middle of the inner wall of the hollow cylinder 1. A fixed shaft 502 is provided on the U-shaped plate 5. An adjusting rod 6 is rotatably arranged on the fixed shaft 502. The middle position of the adjusting rod 6 is set on the fixed shaft 502. The axis of the fixed shaft 502 is perpendicular to the axis space of the hollow cylinder 1. Slideways 601 are provided on the opposite surfaces of the two adjusting rods 6.

[0035] The upper end of the adjusting rod 6 is arranged on the upper part of the inner wall of the hollow cylinder 1 through the adjusting spring 602. The adjusting rod 6 is arranged obliquely and the upper end of the adjusting rod 6 is close to the inner wall of the hollow cylinder 1.

[0036] The clamp-shaped clamping assembly 2 includes two clamping arms 201 that are rotatably arranged relative to each other. The upper portions of the two clamping arms 201 are connected by a limit spring 202. The limit spring 202 and the adjustment spring 602 are not subject to external forces. The two clamping arms 201 are arranged within a slideway 601, and a clamping portion 203 formed by the two clamping arms 201 extends out of the slideway 601 and is in an open state. A groove 2031 is provided on the clamping portion 203 for accommodating a reinforcing hoop of a steel cage. The upper end of the clamping arm 201 is higher than the fixed shaft 502.

[0037] A fixing plate 7 is provided on the upper end surface of the hollow cylinder 1, and a through hole 701 is provided at the center position of the fixing plate 7;

[0038] It also includes a steel wire rope 4 for tightening the two adjusting rods 6. The steel wire rope 4 passes through the through hole 701 from above and is divided into two branches 401. The lower ends of the two branches 401 are connected to the upper ends of the adjusting rods 6. The steel wire rope 4 can be connected to the lifting device.

[0039] The maximum opening and closing angle of the clamping portion 203 is less than 90 degrees, generally 40-70 degrees.

[0040] A locking rod 9 is symmetrically hingedly provided on the lower portion of the inner wall of the hollow cylinder 1. The locking rod 9 is fixed to the inner wall of the hollow cylinder 1 by a tension spring 901. The tension spring 901 is not subjected to external force. The outer end of the locking rod 9 is tilted downward and contacts the clamping arm 201 and is located above the connection between the two clamping arms 201.

[0041] A limiting roller 603 is provided on the adjusting rod 6 and located on the upper part of the two side walls of the slide 601. An opening 604 is provided on the adjusting rod 6 and located below the limiting roller 603. The branch 401 passes through the inner side of the limiting roller 603, the opening 604 and the middle position of the U-shaped plate 5 in sequence and is provided at the outer end of the locking rod 9.

[0042] When the steel cage moves downward, the clamp clamping assembly 2 moves downward along the slide 601 under the action of the gravity of the steel cage, but the presence of the locking rod 9 prevents the clamp clamping assembly 2 from moving downward and because the clamp arm 201 is set at an angle, the force on the clamp arm 201 under the action of the locking rod 9 becomes increasingly greater, which not only limits the downward movement of the clamp clamping assembly 2 but also further tightens the clamping part 203.

[0043] A guide roller 501 is provided between the two side plates of the U-shaped plate 5 , and the branch 401 is located between the U-shaped plate 5 and the guide roller 501 .

[0044] Guide pulleys 8 are symmetrically provided on the lower end surface of the fixing plate 7 , and the branches 401 are in contact with the guide pulleys 8 .

[0045] A slide groove is provided on the fixed plate 7, and the guide pulley 8 is slidably set in the slide groove through the bracket 801. The upper end of the bracket 801 is provided with a screw rod 802 passing through the slide groove. The upper end of the screw rod 802 extends out of the fixed plate 7 and is fixed by a nut 803.

[0046] A flower basket is provided in the middle of the fixed plate 7 , and two screw rods 802 of the flower basket are respectively connected to the brackets 801 of the guide pulley 8 .

[0047] A sealing plate 3 is provided below the hollow cylinder 1 , and a strip-shaped opening 301 is provided in the middle of the sealing plate 3 to allow the clamping portion 203 to extend out.

[0048] The sealing plate 3 is made up of two semicircular plates 302. One end of the semicircular plate 302 away from the center of the hollow cylinder is rotated and set on the inner wall of the hollow cylinder. The other ends of the two semicircular plates 302 are connected in a detachable manner, which can be connected by pins or bolts, and bolts are generally used.

[0049] The pile foundation reinforcement cage hoisting device in the present application can be used in combination with multiple ones, and the adjustment rod 6 and the track can be replaced by channel steel.

[0050] Working principle: extend the clamping part 203 of the clamp-shaped clamping assembly 2 out of the sealing plate 3, then place the grooves 2031 of the two clamping parts 203 on the stiffening hoop, and then tighten the wire rope 4. The lower ends of the two branches 401 lift the outer ends of the locking rod 9 so that it is pressed against the clamping arm 201 and the branches 401 pass through the guide roller 501 and the limit roller 603 and then converge into the through hole 701. Since the upper end of the adjusting rod 6 is connected by a spring, the two branches 401 will be tightened when passing through the position of the through hole 701. Under the restriction of the limit roller 603, the branch 401 will tighten the adjusting rod 6 to the position of the through hole 701. At this time, the adjusting rod 6 rotates at the position of the fixed shaft 502 and the two adjusting rods 6 will clamp the two clamping arms 201 and compress the limit spring 202 when approaching the middle position, so as to achieve the tightening of the clamping end and clamp it on the stiffening hoop.

[0051] After the steel wire rope 4 is tightened, the two branches 401 can be further tightened by adjusting the positions of the two guide pulleys 8 .

[0052] When the steel cage reaches the designated position, the steel wire rope 4 is loosened, and the two clamping arms 201 are reset under the action of the limit spring 202. At this time, the clamping portion 203 is loosened and separated from the stiffening hoop.

[0053] In order to prevent concrete from entering the interior of the hollow cylinder 1 through the strip-shaped opening 301, it is best to wrap and seal it with plastic paper or tape.

[0054] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0056] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0057] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A pile foundation reinforcement cage hoisting device, characterized in that: The invention comprises a hollow cylinder and a clamp-shaped clamping assembly arranged inside the hollow cylinder, a U-shaped plate is symmetrically arranged in the middle of the inner wall of the hollow cylinder, a fixed shaft is provided on the U-shaped plate, an adjustment rod is rotatably provided on the fixed shaft, the middle position of the adjustment rod is provided on the fixed shaft, the axis of the fixed shaft is perpendicular to the axis of the hollow cylinder, and slideways are provided on the opposite surfaces of the two adjustment rods; The upper end of the adjusting rod is arranged on the upper part of the inner wall of the hollow cylinder through the adjusting spring, and the adjusting rod is arranged obliquely and the upper end of the adjusting rod is close to the inner wall of the hollow cylinder; The clamp-shaped clamping assembly includes two clamping arms arranged to rotate with each other, the upper parts of the two clamping arms are connected by a limit spring, the limit spring and the adjustment spring are not subject to external force, the two clamping arms are arranged in the slideway, and the clamping part formed by the two clamping arms extends out of the slideway and the clamping part is in an open state, the clamping part is provided with a groove capable of placing a reinforcing hoop of a steel cage, and the upper end of the clamping arm is higher than the fixed axis; A fixing plate is provided on the upper end surface of the hollow cylinder, and a through hole is provided at the center of the fixing plate; It also includes a steel wire rope for tightening the two adjusting rods, the steel wire rope passes through the through hole from above and is divided into two branches, the lower ends of the two branches are connected to the upper ends of the adjusting rods, and the steel wire rope can be connected to the lifting device; A guide roller is provided between the two side plates of the U-shaped plate, and the branch is located between the U-shaped plate and the guide roller; A guide pulley is symmetrically provided on the lower end surface of the fixed plate, and the branch contacts the guide pulley; A sealing plate is provided below the hollow cylinder, and a strip-shaped opening is provided in the middle of the sealing plate for allowing the clamping portion to extend out.

2. The pile foundation reinforcement cage hoisting device according to claim 1, characterized in that: A locking rod is symmetrically hingedly provided on the lower part of the inner wall of the hollow cylinder, and the locking rod is fixed to the inner wall of the hollow cylinder by a tension spring. The tension spring is not subject to external force, and the outer end of the locking rod is tilted downward and contacts the clamping arm and is located above the connection between the two clamping arms; A limiting roller is provided on the adjusting rod and located on the upper part of the two side walls of the slide, an opening is provided on the adjusting rod and located below the limiting roller, and the branch passes through the inner side of the limiting roller, the opening and the middle position of the U-shaped plate in sequence and is provided at the outer end of the locking rod.

3. The pile foundation reinforcement cage hoisting device according to claim 1, characterized in that: The fixing plate is provided with a sliding opening, the guide pulley is slidably arranged in the sliding opening through a bracket, the upper end of the bracket is provided with a screw passing through the sliding opening, the upper end of the screw extends out of the fixing plate and is fixed by a nut.

4. The pile foundation reinforcement cage hoisting device according to claim 3, characterized in that: A flower basket is provided in the middle of the fixed plate, and two screw rods of the flower basket are respectively connected to the brackets of the guide pulley.

5. The pile foundation reinforcement cage hoisting device according to claim 1, characterized in that: The sealing plate is formed by splicing two semicircular plates, one end of the semicircular plate away from the center of the hollow cylinder is rotatably arranged on the inner wall of the hollow cylinder, and the other ends of the two semicircular plates are connected in a detachable manner.

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