Cast-in-situ bored pile reinforcement cage lowering positioning device

Abstract

The invention provides a cast-in-situ bored pile reinforcement cage lowering positioning device which comprises a supporting cylinder, two positioning assemblies are symmetrically arranged on the supporting cylinder, supporting discs are fixedly arranged at the two ends of the supporting cylinder, and main reinforcement connecting assemblies corresponding to main reinforcements of a reinforcement cage are arranged on the supporting discs in a circumferential array mode. A telescopic driving assembly for driving the main reinforcement connecting assembly to reciprocate is arranged in the middle of the top of the supporting disc; according to the device, in the lowering process of the reinforcement cage, the pulleys at the ends of the telescopic arms make contact with and are in sliding connection with the inner wall of a drill hole, the positioning effect can be achieved when the reinforcement cage is lowered into the drill hole, the reinforcement cage is prevented from deviating in the drill hole, and the construction quality is guaranteed; the main reinforcement connecting assembly is driven by the telescopic driving assembly to extend outwards or retract inwards, so that the end of the main reinforcement connecting assembly abuts against or is separated from a main reinforcement of the reinforcement cage, and rapid connection or release between the device and the reinforcement cage is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of bored cast-in-place pile construction, and in particular relates to a bored cast-in-place pile reinforcement cage lowering positioning device. Background Art

[0002] Bored cast-in-place piles refer to piles made by forming pile holes in the foundation soil at the construction site through mechanical drilling, steel pipe squeezing or manual excavation, placing a steel cage inside and pouring concrete.

[0003] During the placement of the steel cage, a hanger is usually welded in the center of the top of the steel cage, and the crane hook is used to connect the hanger. The steel cage is lifted and lowered to the bored pile position. During the lowering process, care must be taken to avoid deviation of the steel cage. Deflection of the steel cage will result in insufficient thickness of the steel bar protective layer on one side, which will damage the durability of the pile foundation. The steel cage will easily hit the hole wall, which will easily damage the stability of the hole wall, leading to an increase in sediment at the bottom of the pile, affecting the bearing capacity of the pile foundation and post-construction settlement, and having a serious impact on the construction quality.

[0004] The steel cage in the prior art is usually set on the ground outside the top of the drill hole. For example, the Chinese utility model patent document with authorization announcement number CN221663644U discloses a steel cage positioning device. This positioning device can only limit the steel cage at the top of the drill hole. When the steel cage enters the drill hole, it is still easy to deviate, which affects the construction quality.

[0005] Therefore, it is necessary to design a bored pile reinforcement cage lowering positioning device that can position the reinforcement cage inside the borehole, avoid the displacement of the reinforcement cage inside the borehole, and ensure the construction quality to solve the current technical problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a bored cast-in-place pile reinforcement cage lowering and positioning device which can position the reinforcement cage inside the borehole, avoid the displacement of the reinforcement cage inside the borehole, and ensure the construction quality.

[0007] The technical solution of the present invention is as follows: a positioning device for lowering a bored cast-in-place pile reinforcement cage comprises a support tube, on which two groups of positioning components are symmetrically arranged, support plates are fixedly arranged at both ends of the support tube, main reinforcement connection components corresponding to the main reinforcement of the reinforcement cage are arranged in a circular array on the support plate, and a telescopic driving component for driving the main reinforcement connection component to move back and forth is centrally arranged on the top of the support plate; the positioning component comprises a positioning cylinder body fixedly connected to the support tube, four groups of telescopic arms are arranged in a circular array on the outer side of the positioning cylinder body, a pulley is rotatably arranged on the end of the telescopic arm away from the positioning cylinder body, and a telescopic adjustment mechanism for driving the telescopic arms on the outer side to synchronously extend and retract is arranged inside the positioning cylinder body.

[0008] The telescopic arm comprises an outer arm arranged on the outer side of the positioning cylinder along the radial direction thereof, an inner arm is slidably arranged inside the outer arm, the pulley is rotatably arranged at one end of the inner arm, an internal threaded hole is opened inside the inner arm, a driving screw is rotatably arranged inside the outer arm, the driving screw is threadedly connected to the internal threaded hole, and the telescopic adjustment mechanism is transmission-connected to one end of the driving screw.

[0009] The telescopic adjustment mechanism has a driven bevel gear fixedly arranged at one end of the driving screw, a frame plate is fixedly arranged inside the positioning cylinder perpendicular to its axial direction, an active bevel gear meshing with the driven bevel gear is arranged at the bottom of the frame plate, and an adjustment drive motor driving the active bevel gear to rotate is arranged at the top of the frame plate.

[0010] The main reinforcement connecting piece has a sliding seat fixedly arranged on the top of the support plate, a sliding rod is arranged inside the sliding seat for radial sliding along the support plate, a groove matching the main reinforcement of the steel cage is fixedly arranged on the end of the sliding rod away from the center of the support plate, an anti-slip pad is arranged inside the groove, a connecting rod is hinged on the other end of the sliding rod, a hinge seat is hinged on the end of the connecting rod away from the groove, and the telescopic drive assembly drives the hinge seat to reciprocate along the axial direction of the support tube.

[0011] The telescopic driving assembly has a lifting plate arranged above the supporting plate in an axially sliding manner, the supporting plate is provided with a lifting driving mechanism for driving the lifting plate to move up and down, and the hinge seat is fixedly arranged at the bottom of the supporting plate.

[0012] The lifting drive mechanism rotates a lead screw arranged on the top of the support plate along the axial direction thereof, a lead screw nut threadedly connected to the lead screw is fixedly arranged on the lifting plate, and a lifting drive motor for driving the lead screw to rotate is fixedly arranged at the bottom of the support plate.

[0013] The top of the support plate is provided with four guide rods in a circular array, the lifting plate is fixedly provided with a linear bearing slidably sleeved on the outside of the guide rods, and the top of the guide rods is fixedly provided with a limit plate.

[0014] The top of the support plate is provided with hanging plates in a circular array. The hanging plates are vertically fixed on the top of the support plate, and hanging holes are opened on the hanging plates.

[0015] The support cylinder has a fixed cylinder body, a sleeve is fixedly arranged at one end of the fixed cylinder body, a telescopic cylinder body is slidably arranged inside the end of the sleeve away from the fixed cylinder body, and an electric push rod is arranged inside the sleeve to drive the telescopic cylinder body to reciprocate inside the sleeve.

[0016] A base plate is fixedly provided on one end of the sleeve close to the fixed cylinder body, a slide plate slidably arranged inside the sleeve is fixedly provided on one end of the telescopic cylinder close to the sleeve, the electric push rod is arranged between the slide plate and the base plate, and a retaining ring corresponding to the edge of the slide plate is fixedly provided on the inner side of one end of the sleeve facing away from the fixed cylinder body.

[0017] Beneficial effects of the present invention:

[0018] (1) In the present invention, the pulley at the end of the telescopic arm contacts and slides with the inner wall of the borehole during the lowering process of the steel cage, which can play a positioning role when the steel cage is lowered inside the borehole, thereby preventing the steel cage from deflecting inside the borehole and ensuring the construction quality;

[0019] (2) The main reinforcement connection assembly is driven to extend outward or retract inward by the telescopic driving assembly, so that the end of the main reinforcement connection assembly is abutted against or separated from the main reinforcement of the steel cage, thereby realizing the rapid connection or release between the device and the steel cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the positioning device for lowering the bored cast-in-place pile reinforcement cage in the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of the positioning component in the present invention.

[0022] Figure 3 for Figure 2 Cross-section view at AA in the middle.

[0023] Figure 4 It is a structural schematic diagram of the main reinforcement connection assembly in the present invention.

[0024] Figure 5 It is a structural schematic diagram of the telescopic drive assembly in the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the support tube in the present invention. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is not intended to be any limitation on the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limitations.

[0027] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] like Figures 1 to 6 As shown, the positioning device for lowering the reinforcement cage of bored cast-in-place piles comprises a support tube 1, on which two groups of positioning components 5 are symmetrically arranged, support plates 2 are fixedly arranged at both ends of the support tube 1, main reinforcement connection components 3 corresponding to the main reinforcement of the reinforcement cage are arranged in a circumferential array on the support plate 2, and a telescopic driving component 4 for driving the main reinforcement connection component 3 to move back and forth is arranged in the center of the top of the support plate 2; the positioning component 5 has a positioning cylinder body 51 fixedly connected to the support tube 1, and four groups of telescopic arms 52 are arranged in a circumferential array on the outer side of the positioning cylinder body 51, and a pulley 53 is rotatably arranged on the end of the telescopic arm 52 away from the positioning cylinder body 51, and a telescopic adjustment mechanism 54 for driving the telescopic arm 52 on the outer side thereof to synchronously extend and retract is arranged inside the positioning cylinder body 51; in this embodiment, the positioning device for lowering the reinforcement cage of bored cast-in-place piles is pre-installed inside the reinforcement cage before the reinforcement cage is lifted, and the main reinforcement connection component 3 is driven to extend outward by the telescopic driving component 4. The main reinforcement of the steel cage is abutted against it to achieve fixation between the device and the steel cage, and then the length of the telescopic arm 52 is adjusted by the telescopic adjustment mechanism 54 according to the inner diameter of the borehole, so that the length of the telescopic arm 52 matches the inner diameter of the borehole, and then a support plate 2 is lifted by a hook to lift the steel cage vertically and lower it into the borehole. During the lowering process, the pulley 53 at the end of the telescopic arm 52 contacts and slides with the inner wall of the borehole, which can play a positioning role when the steel cage is lowered into the borehole, avoiding the displacement of the steel cage inside the borehole and ensuring the construction quality; after the steel cage is lowered into place, the main reinforcement connection component 3 is driven inwardly by the telescopic drive component 4 to separate the end of the main reinforcement connection component 3 from the main reinforcement of the steel cage, so as to achieve release between the device and the steel cage, and then the telescopic arm 52 is retracted into the steel cage, and the bored cast-in-place pile steel cage lowering positioning device can be lifted upward from the inside of the steel cage.

[0029] In some embodiments, the telescopic arm 52 has an outer arm 521 arranged on the outer side of the positioning cylinder 51 along the radial direction thereof, an inner arm 522 is slidably arranged inside the outer arm 521, a pulley 53 is rotatably arranged at one end of the inner arm 522, an internal threaded hole 523 is opened inside the inner arm 522, a driving screw 524 is rotatably arranged inside the outer arm 521, the driving screw 524 is threadedly connected to the internal threaded hole 523, the telescopic adjustment mechanism 54 is transmission-connected to one end of the driving screw 524, the driving screw 524 is driven to rotate forward and reversely through the telescopic adjustment mechanism 54, the driving screw 524 cooperates with the internal threaded hole 523, and can drive the inner arm 522 to slide back and forth inside the outer arm 521, thereby realizing the telescopic control of the telescopic arm 52.

[0030] In some embodiments, the telescopic adjustment mechanism 54 has a driven bevel gear 544 fixedly arranged at one end of the driving screw 524, a frame plate 541 is fixedly arranged inside the positioning cylinder 51 perpendicular to its axial direction, an active bevel gear 543 meshing with the driven bevel gear 544 is arranged at the bottom of the frame plate 541, and an adjusting drive motor 542 driving the active bevel gear 543 to rotate is arranged on the top of the frame plate 541, the adjusting drive motor 542 drives the active bevel gear 543 to rotate forward and reverse, the active bevel gear 543 drives the driven bevel gear 544 to rotate forward and reverse, and the driven bevel gear 544 can drive the driving screw 524 to rotate back and forth, thereby realizing the telescopic control of the telescopic arm 52.

[0031] In some embodiments, the main reinforcement connector 3 has a slide seat 31 fixedly arranged on the top of the support plate 2, a slide rod 32 is arranged inside the slide seat 31 for radial sliding along the support plate 2, a slot 33 matching the main reinforcement of the steel cage is fixedly arranged on the end of the slide rod 32 away from the center of the support plate 2, an anti-slip pad 34 is arranged inside the slot 33, a connecting rod 35 is hinged at the other end of the slide rod 32, a hinge seat 36 is hinged at the end of the connecting rod 35 away from the slot 33, and the telescopic drive assembly 4 drives the hinge seat 36 to reciprocate along the axial direction of the support tube 1 Movement; During the axial reciprocating movement of the hinge seat 36 along the support tube 1, the connecting rod 35 pushes the sliding rod 32 to slide outward or slide inward to reset inside the sliding seat 31, so that the slot 33 abuts against the outside of the main reinforcement of the steel cage or the slot 33 is separated from the main reinforcement of the steel cage; when all the slots 33 on the support plate 2 abut against the outside of the main reinforcement of the steel cage at the same time, the device can be fixed to the steel cage; the anti-slip pad 34 can prevent the slot 33 from sliding against the main reinforcement of the steel cage, thereby ensuring the stability of the connection.

[0032] In some embodiments, the telescopic drive assembly 4 has a lifting plate 41 which is arranged above the support plate 2 and slides along the axial direction thereof. A lifting drive mechanism 42 is arranged on the support plate 2 to drive the lifting plate 41 to move back and forth up and down. The hinge seat 36 is fixedly arranged at the bottom of the support plate 2. The lifting drive mechanism 42 drives the lifting plate 41 to move up and down, and the lifting plate 41 drives the hinge seat 36 to move back and forth up and down along the axial direction of the support tube 1. The hinge seat 36 drives the connecting rod 35 to push the sliding rod 32 to slide outward or slide inward to reset inside the sliding seat 31, so that the slot 33 abuts against the outside of the main reinforcement of the steel cage or the slot 33 is separated from the main reinforcement of the steel cage.

[0033] In some embodiments, the lifting drive mechanism 42 is provided with a lead screw 422 on the top thereof that rotates axially along the support plate 2, a lead screw nut 423 that is threadedly connected to the lead screw 422 is fixedly provided on the lifting plate 41, and a lifting drive motor 421 that drives the lead screw 422 to rotate is fixedly provided at the bottom of the support plate 2. The lifting drive motor 421 drives the lead screw 422 to rotate, and the lead screw 422 and the lead screw nut 423 are matched through a threaded structure, so that the lead screw nut 423 drives the lifting plate 41 to move back and forth along the axial direction of the support plate 2.

[0034] In some embodiments, four guide rods 43 are arranged in a circular array on the top of the support plate 2, a linear bearing 45 is fixedly provided on the lifting plate 41 and is slidably mounted on the outside of the guide rod 43, a limit plate 44 is fixedly provided on the top of the guide rod 43, and the lifting plate 41 cooperates with the guide rod 43 through the linear bearing 45 to achieve axial sliding above the support plate 2; the limit plate 44 can prevent the lifting plate 41 from slipping off the guide rod 43.

[0035] In some embodiments, a hanging plate 6 is arranged in a circular array on the top of the support plate 2. The hanging plate 6 is vertically fixed on the top of the support plate 2. A hanging hole 61 is opened on the hanging plate 6. A steel wire rope can be inserted into the inside of the hanging hole 61. The steel wire rope is connected to the hook when lifting the device.

[0036] In some embodiments, the support tube 1 has a fixed cylinder body 11, a sleeve 12 is fixedly provided at one end of the fixed cylinder body 11, a telescopic cylinder body 13 is slidably provided inside the end of the sleeve 12 away from the fixed cylinder body 11, and an electric push rod 14 is provided inside the sleeve 12 for driving the telescopic cylinder body 13 to reciprocate inside the sleeve 12. The telescopic cylinder body 13 is driven to reciprocate inside the sleeve 12 by the electric push rod 14, so that the length of the support tube 1 can be adjusted. When in use, it can be adaptively adjusted according to the length of the steel cage, and is suitable for steel cages of different lengths.

[0037] In some embodiments, a base plate 17 is fixedly provided on one end of the sleeve 12 close to the fixed cylinder body 11, a slide plate 15 slidably arranged inside the sleeve 12 is fixedly provided on one end of the telescopic cylinder body 13 close to the sleeve 12, an electric push rod 14 is arranged between the slide plate 15 and the base plate 17, and a retaining ring 16 corresponding to the edge of the slide plate 15 is fixedly provided on the inner side of the end of the sleeve 12 facing away from the fixed cylinder body 11, and the retaining ring 16 is used to prevent the telescopic cylinder body 13 from slipping out of the sleeve 13.

[0038] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0039] The above-mentioned embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A positioning device for lowering a bored pile reinforcement cage, characterized in that: It comprises a support cylinder, on which two groups of positioning components are symmetrically arranged, support plates are fixedly arranged at both ends of the support cylinder, main reinforcement connection components corresponding to the main reinforcement of the steel cage are arranged in a circumferential array on the support plate, and a telescopic driving component for driving the main reinforcement connection component to move back and forth is arranged in the center of the top of the support plate; The positioning assembly comprises a positioning cylinder body fixedly connected to the supporting cylinder, the outer side of the positioning cylinder body is provided with four groups of telescopic arms in a circular array, a pulley is rotatably provided on one end of the telescopic arm away from the positioning cylinder body, and the interior of the positioning cylinder body is provided with a telescopic adjustment mechanism for driving the telescopic arms on the outer side thereof to synchronously telescope.

2. The positioning device for lowering a bored pile reinforcement cage according to claim 1, characterized in that: The telescopic arm comprises an outer arm arranged on the outer side of the positioning cylinder along the radial direction thereof, an inner arm is slidably arranged inside the outer arm, the pulley is rotatably arranged at one end of the inner arm, an internal threaded hole is opened inside the inner arm, a driving screw is rotatably arranged inside the outer arm, the driving screw is threadedly connected to the internal threaded hole, and the telescopic adjustment mechanism is transmission-connected to one end of the driving screw.

3. The positioning device for lowering a bored pile reinforcement cage according to claim 2, characterized in that: The telescopic adjustment mechanism has a driven bevel gear fixedly arranged at one end of the driving screw, a frame plate is fixedly arranged inside the positioning cylinder perpendicular to its axial direction, an active bevel gear meshing with the driven bevel gear is arranged at the bottom of the frame plate, and an adjustment drive motor driving the active bevel gear to rotate is arranged at the top of the frame plate.

4. The positioning device for lowering a bored pile reinforcement cage according to claim 1, characterized in that: The main reinforcement connecting piece has a sliding seat fixedly arranged on the top of the support plate, a sliding rod is arranged inside the sliding seat for radial sliding along the support plate, a groove matching the main reinforcement of the steel cage is fixedly arranged on the end of the sliding rod away from the center of the support plate, an anti-slip pad is arranged inside the groove, a connecting rod is hinged on the other end of the sliding rod, a hinge seat is hinged on the end of the connecting rod away from the groove, and the telescopic drive assembly drives the hinge seat to reciprocate along the axial direction of the support tube.

5. The positioning device for lowering a bored pile reinforcement cage according to claim 4 is characterized in that: The telescopic driving assembly has a lifting plate arranged above the supporting plate in an axially sliding manner, the supporting plate is provided with a lifting driving mechanism for driving the lifting plate to move up and down, and the hinge seat is fixedly arranged at the bottom of the supporting plate.

6. The positioning device for lowering a bored pile reinforcement cage according to claim 5, characterized in that: The lifting drive mechanism rotates a lead screw arranged on the top of the support plate along the axial direction thereof, a lead screw nut threadedly connected to the lead screw is fixedly arranged on the lifting plate, and a lifting drive motor for driving the lead screw to rotate is fixedly arranged at the bottom of the support plate.

7. The positioning device for lowering a bored pile reinforcement cage according to claim 6, characterized in that: The top of the support plate is provided with four guide rods in a circular array, the lifting plate is fixedly provided with a linear bearing slidably sleeved on the outside of the guide rods, and the top of the guide rods is fixedly provided with a limit plate.

8. The positioning device for lowering a bored pile reinforcement cage according to claim 1, characterized in that: The top of the support plate is provided with hanging plates in a circular array. The hanging plates are vertically fixed on the top of the support plate, and hanging holes are opened on the hanging plates.

9. The positioning device for lowering a bored pile reinforcement cage according to claim 1, characterized in that: The support cylinder has a fixed cylinder body, a sleeve is fixedly arranged at one end of the fixed cylinder body, a telescopic cylinder body is slidably arranged inside the end of the sleeve away from the fixed cylinder body, and an electric push rod is arranged inside the sleeve to drive the telescopic cylinder body to reciprocate inside the sleeve.

10. The positioning device for lowering a bored pile reinforcement cage according to claim 9, characterized in that: A base plate is fixedly provided on one end of the sleeve close to the fixed cylinder body, a slide plate slidably arranged inside the sleeve is fixedly provided on one end of the telescopic cylinder close to the sleeve, the electric push rod is arranged between the slide plate and the base plate, and a retaining ring corresponding to the edge of the slide plate is fixedly provided on the inner side of one end of the sleeve facing away from the fixed cylinder body.

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