Prefabricated short pile hoisting device

Abstract

The utility model provides a kind of prefabricated short pile hoisting device, it is related to the technical field of prefabricated short pile hoisting, the prefabricated short pile hoisting device includes hoisting body, upper connector is provided at the upper end of the hoisting body, multiple support arms are provided at the lower end of the hoisting body, and the support plate is used to abut with the lower end surface of prefabricated short pile.The hoisting body of prefabricated short pile hoisting device provided by the utility model is inserted into prefabricated short pile;Multiple support arms are folded to hoisting body, when support arm is worn from the lower end of prefabricated short pile, multiple support arms are scattered, and the support plate on support arm abuts with the lower end surface of prefabricated short pile, so that prefabricated short pile can be lifted by lifting equipment;When prefabricated short pile is moved to the upper end of the prefabricated short pile to be butt-jointed, hoisting body is inserted into the prefabricated short pile to be butt-jointed, and the prefabricated short pile makes support arm fold, so that the hoisting body can be extracted from prefabricated short pile, and the hoisting of one prefabricated short pile is completed.

Description

Technical Field

[0001] This utility model relates to the technical field of precast short pile hoisting, and in particular to a precast short pile hoisting device. Background Technology

[0002] With the widespread application of new precast composite soil extrusion-cured short piles, traditional hoisting methods have significant shortcomings. Due to the small size and unique weight distribution of short piles, traditional hoisting methods are prone to causing localized stress concentration, leading to damage at the pile edges. The brittle nature of composite materials makes existing rigid hoisting tools susceptible to micro-cracks at the contact surface. Furthermore, short pile construction requires rapid and continuous hoisting, and traditional methods have low tool conversion efficiency, making them unsuitable for high-frequency operations.

[0003] Therefore, it is necessary to develop hoisting devices suitable for new precast composite soil extrusion and curing short piles to ensure the smooth implementation of hoisting operations. Utility Model Content

[0004] The purpose of this invention is to provide a precast short pile hoisting device to alleviate the technical problem of low hoisting tool conversion efficiency in traditional methods, which cannot meet the needs of high-frequency operations.

[0005] This utility model provides a precast short pile hoisting device, including a hoisting body, an upper connector is provided at the upper end of the hoisting body, and a plurality of support arms are provided at the lower end of the hoisting body. One end of each support arm is hinged to the hoisting body, and the other end is provided with a support plate. The support plate is used to abut against the lower end surface of the precast short pile.

[0006] A return spring is provided between the support arm and the hoisting body.

[0007] In an optional embodiment, the hoisting body includes a telescopic outer sleeve and a telescopic boom, with one end of the telescopic boom mounted on the telescopic outer sleeve;

[0008] The upper connector is mounted on the telescopic outer sleeve, and the support arm is mounted on the telescopic rod.

[0009] In an optional embodiment, the lower end of the telescopic outer tube is provided with a plurality of limiting extension rods, and the limiting extension rods are evenly arranged along the periphery of the telescopic outer tube.

[0010] Multiple limiting through holes are provided along the length of the limiting extension rod, and multiple limiting slots are provided along the length of the telescopic rod; at least one limiting through hole corresponds to one limiting slot; a limiting bolt is fitted on the limiting through hole, and the limiting bolt is inserted into the limiting slot.

[0011] In an optional embodiment, the limiting groove is an annular groove.

[0012] In an optional embodiment, an auxiliary pulley is provided on the upper end face of the support plate, and the support plate abuts against the precast short pile through the auxiliary pulley;

[0013] The lower end face of the support plate is provided with a main pulley, which is used to abut against the inner wall of the precast short pile.

[0014] In an optional embodiment, a linkage mechanism is also included, one end of which is connected to the support arm and the other end of which is connected to the hoisting body;

[0015] Furthermore, each of the support arms is connected to the hoisting body by a linkage mechanism.

[0016] In an optional embodiment, the upper connector is a lifting ring.

[0017] In an optional embodiment, the hoisting body is provided with four support arms, which are evenly arranged along the periphery of the hoisting body.

[0018] In an optional embodiment, a plurality of limiting blocks are also included, which are assembled between the support arm and the hoisting body, and are used to maintain a fixed interval between the support arm and the hoisting body.

[0019] In an optional embodiment, multiple limiting blocks are spliced ​​together to form a ring, which is engaged between the support arm and the hoisting body.

[0020] The precast short pile hoisting device provided by this utility model has an upper connecting part for connecting with a tower crane. The hoisting body is equipped with support arms. When the hoisting body is inserted into the precast short pile, multiple support arms retract towards the hoisting body. When the support arms protrude from the lower end of the precast short pile, the multiple support arms spread out, and the support plates on the support arms abut against the lower end face of the precast short pile. In this way, the precast short pile can be lifted by the lifting equipment. When the precast short pile is moved to the upper end of the precast short pile to be connected, the hoisting body is inserted into the precast short pile to be connected. The precast short pile causes the support arms to retract, so the hoisting body can be pulled out from the precast short pile, completing the hoisting of one precast short pile. This improves the efficiency of hoisting precast short piles, and the multiple support plates supporting the lower end of the precast short pile make it less likely for the precast short pile to crack. It improves operational efficiency and construction safety, and is particularly suitable for repeated hoisting, large-scale, and high-frequency construction scenarios. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the prefabricated short pile hoisting device provided in an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 A partial enlarged view of diagram A of the precast short pile hoisting device shown;

[0024] Figure 3 for Figure 1 The diagram shows the structural configuration of the precast short pile hoisting device in use.

[0025] Figure 4 for Figure 3 A partial enlarged view of section B in the structural schematic diagram of the precast short pile hoisting device in use;

[0026] Figure 5 for Figure 1 A schematic diagram of another usage state of the precast short pile hoisting device shown;

[0027] Figure 6 for Figure 5 A partial enlarged view of section C of the structural schematic diagram of another usage state of the precast short pile hoisting device shown.

[0028] Icons: 100-Precast short pile; 200-Lifting body; 201-Telescopic outer sleeve; 202-Telescopic boom; 2021-Limiting slot; 300-Upper connector; 400-Support arm; 500-Limiting extension rod; 501-Limiting bolt; 502-Limiting perforation; 600-Reset spring; 700-Linkage mechanism; 800-Limiting stop; 900-Main pulley; 110-Auxiliary pulley. Detailed Implementation

[0029] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0030] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0033] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.

[0034] Example

[0035] Reference Figures 1-6 This utility model provides a precast short pile hoisting device, including a hoisting body 200, an upper connector 300 is provided at the upper end of the hoisting body 200, and a plurality of support arms 400 are provided at the lower end of the hoisting body 200. One end of each support arm 400 is hinged to the hoisting body 200, and the other end is provided with a support plate. The support plate is used to abut against the lower end surface of the precast short pile 100.

[0036] A return spring 600 is provided between the support arm 400 and the hoisting body 200.

[0037] In some embodiments, the upper end of the hoisting body 200 of the precast short pile hoisting device is provided with an upper connector 300. The upper connector 300 is located at the top of the hoisting rod and is made of high-strength steel. The upper connector 300 is generally a hoisting ring with a standard hook hole, which can be connected to hoisting equipment such as tower cranes and winches.

[0038] As the hoisting connection point for the entire machine, the lifting ring is a key node in the external force transmission device, bearing all vertical tension and transmitting it to the boom.

[0039] Multiple support arms 400 are provided at the lower end of the hoisting body 200. One end of each support arm 400 is hinged to the hoisting body 200, and the other end is provided with a support plate. When the lower end of the hoisting body 200 is inserted into the precast short pile 100, the multiple support arms 400 are squeezed by the precast short pile, causing the multiple support arms 400 to move closer to the center; thus, the hoisting body 200 can be inserted into the precast short pile 100. When the hoisting body 200 passes through the lower end of the precast short pile 100, the support arms 400 separate. After the support plate at the upper end of the support arm 400 abuts against the lower end of the precast short pile 100, the lifting equipment pulls the hoisting body 200, and the support plates of the multiple support arms 400 form a support plane. This support plane abuts against the lower end face of the precast short pile 100, thus lifting the precast short pile 100. Because the precast short pile 100 is supported by a single supporting plane, the precast short pile 100 is subjected to uniform force, which makes it less likely for the edge of the precast short pile 100 to break. This solves the problem that the brittle properties of composite materials make it easy for existing rigid lifting tools to generate micro-cracks at the contact surface.

[0040] In an optional embodiment, the hoisting body 200 includes a telescopic outer sleeve 201 and a telescopic boom 202, with one end of the telescopic boom 202 mounted on the telescopic outer sleeve 201;

[0041] The upper connector 300 is mounted on the telescopic outer sleeve 201, and the support arm 400 is mounted on the telescopic rod 202.

[0042] In some embodiments, the hoisting body 200 includes a telescopic outer tube 201, an upper connector 300 is disposed at the upper end of the telescopic outer tube 201, a support arm 400 is disposed at the lower end of the telescopic boom 202, and one end of the telescopic boom 202 is located inside the telescopic outer tube 201.

[0043] The telescopic boom 202 can extend and retract relative to the telescopic outer sleeve 201, thereby adjusting the length of the entire hoisting body 200 so that the hoisting body 200 can adapt to precast short piles 100 of different specifications.

[0044] Reference Figure 2 In an optional embodiment, the lower end of the telescopic outer sleeve 201 is provided with a plurality of limiting extension rods 500, and the limiting extension rods 500 are evenly arranged along the periphery of the telescopic outer sleeve 201.

[0045] Multiple limiting through holes 502 are provided along the length of the limiting extension rod 500, and multiple limiting slots 2021 are provided along the length of the telescopic rod 202; at least one of the limiting through holes 502 corresponds to one of the limiting slots 2021; a limiting bolt 501 is installed on the limiting through hole 502, and the limiting bolt 501 is inserted into the limiting slot 2021.

[0046] In an optional embodiment, the limiting slot 2021 is an annular slot.

[0047] To ensure the telescopic boom 202 can maintain a fixed extension length, a limiting slot 2021 is provided on the telescopic boom 202, with multiple limiting slots 2021 arranged along the length of the telescopic boom 202. A limiting extension rod 500 is provided at the lower end of the telescopic outer tube 201, and multiple limiting through holes 502 are provided on the limiting extension rod 500. At least one limiting through hole 502 corresponds to the limiting slot 2021 on the telescopic boom 202. When the limiting bolt 501 is inserted into the limiting through hole 502 and continues to be inserted into the limiting slot 2021, the telescopic boom 202 cannot move relative to the telescopic outer tube 201. This achieves relative fixation between the telescopic boom 202 and the limiting extension rod 500.

[0048] When it is necessary to adjust the length of the entire hoisting body 200, the limiting bolt 501 is pulled out from the limiting slot 2021, at which point the limiting extension rod 500 and the telescopic boom 202 can move relative to each other; when the telescopic boom 202 moves to the appropriate position, the limiting bolt 501 is then inserted into the limiting slot 2021 on the telescopic boom 202, thus fixing the position of the limiting extension rod and the telescopic boom 202, and fixing the length of the hoisting body 200, thereby realizing the length adjustment of the hoisting body 200.

[0049] The telescopic outer sleeve 201 is a hollow tube at the lower end, which is sleeved on the telescopic boom 202 and has a pluggable limit bolt 501 on its side wall; by inserting the limit bolt 501 into the limit slot 2021 of the telescopic boom 202, the hoisting body 200 can be locked and positioned at different length levels.

[0050] The telescopic boom 202 is made of high-strength round steel and has several longitudinal grooves or circumferential limiting grooves in its axial direction (designed according to the required pitch adjustment). The telescopic boom 202 is located inside the lower end of the telescopic outer sleeve 201. With the use of the limiting bolt 501, the length of the telescopic boom 202 can be freely adjusted between multiple positions by changing the insertion position of the locking protrusion 501 of the limiting bolt 501, so as to adapt to the precast short piles 100 of composite soil extrusion and curing of different length specifications.

[0051] When the limit bolt 501 is combined with the limit slot 2021, it forms a mechanical stop, which can effectively prevent the telescopic boom 202 from slipping, retracting or being accidentally displaced during hoisting.

[0052] Reference Figure 4 In an optional embodiment, an auxiliary pulley 110 is provided on the upper end surface of the support plate, and the support plate abuts against the precast short pile 100 through the auxiliary pulley 110.

[0053] The lower end face of the support plate is provided with a main pulley 900, which is used to abut against the inner wall of the precast short pile 100.

[0054] In some embodiments, a plurality of auxiliary pulleys 110 are provided on the upper surface of the support plate, the auxiliary pulleys 110 abut against the lower surface of the precast short pile 100, and a main pulley 900 is also provided at the lower end of the support plate.

[0055] The main roller guides the precast short pile 100 into the pile hole, reducing overall friction and improving the smoothness of retraction. The auxiliary roller, during contact with the bottom edge or inner end of the precast short pile 100, further disperses contact pressure, reducing scratches and wear between structures. The auxiliary roller works in conjunction with the main roller to ensure a smooth transition of the support arm 400 throughout the retraction process, preventing jamming or vibration and improving the stability and lifespan of the hoisting device.

[0056] In an optional embodiment, a linkage mechanism 700 is also included, one end of which is connected to the support arm 400 and the other end of which is connected to the hoisting body 200.

[0057] Furthermore, a linkage mechanism 700 is provided between each of the support arms 400 and the hoisting body 200.

[0058] Each support arm 400 is hinged to the telescopic rod 202 via a rigid connecting rod, which controls the unfolding and retraction path of the support arm 400; limits the unfolding angle of the support arm 400 to prevent structural deformation; and coordinates the telescopic rod 202 and the main pulley 900 to complete the overall linkage.

[0059] The return spring 600 is located below the linkage mechanism 700, connecting the support arm 400 and the lower part of the telescopic rod 202, and is made of fatigue-resistant steel spring or helical return component.

[0060] When the support arm 400 is extended to the preset maximum angle, it provides a rebound limit to prevent the structure from being over-opened, which could lead to fatigue damage or jamming. During the retraction process, it provides tension guidance to ensure that the support arm 400 is stably and snugly retracted to both sides of the boom, improving the smoothness of the operation and the consistency of the structure. It also enhances the overall service life and reliability of the device and maintains the dynamic balance between retraction and extension during long-term construction cycles.

[0061] Reference Figure 4 In an optional embodiment, a plurality of limiting blocks 800 are also included. The limiting blocks 800 are assembled between the support arm 400 and the hoisting body 200, and the limiting blocks 800 are used to maintain a fixed interval between the support arm 400 and the hoisting body 200.

[0062] In an optional embodiment, multiple limiting blocks 800 are spliced ​​into a ring and engaged between the support arm 400 and the hoisting body 200.

[0063] The limiting block 800 is generally made of rubber; multiple limiting blocks 800 are spliced ​​into a ring and set between the support arm 400 and the hoisting body 200 before the precast short pile 100 is hoisted; the limiting block 800 limits the range of motion of the support arm, improves safety, ensures the accurate movement trajectory of each component, and extends the service life of the device.

[0064] Before the formal lifting operation begins, the length of the lifting body 200 is adjusted to a suitable position by inserting and removing the limit bolt 501; the support arm 400 is manually adjusted to the extended state, and the limit stop 800 is installed. Then, the lifting device is passed through the pile hole of the precast short pile 100 to be lifted. After the device is inserted, the lifting ring is exposed outside the pile body, and is connected to the slings of the lifting equipment (such as tower crane, winch, crawler crane, etc.) through the lifting ring.

[0065] The precast short pile 100 was slowly lifted upwards, and under the stable guidance of the support arm 400 and the axial vertical force of the hoisting body 200, it was steadily pulled to a vertical position.

[0066] After the lifting is completed and the structure is in a vertical position, the lifting equipment slowly transports the lifting device and the precast short pile 100 as a whole to the position above the lower pile body to be connected, ensuring that the axis is aligned.

[0067] After positioning, the hoisting body 200 is slowly lowered by controlling the lifting equipment, which drives the entire precast short pile 100 to descend vertically to the docking hole position of the lower precast short pile 100. When the support arm 400 comes into contact with the inner wall of the lower precast short pile 100, the limiting block is removed, and the support arm 400 gradually compresses and retracts towards the center under the squeezing force provided by the side wall.

[0068] Under the combined action of the auxiliary rollers and the side wall pressure, the support arm 400 slowly fits into the telescopic boom 202 and enters the pile hole of the precast pile being hoisted.

[0069] Once the lower end of the precast short pile 100 being hoisted contacts the upper end of the pile body to be connected, the connection is considered complete. At this point, the hoisting equipment is continued to be lifted, causing the telescopic boom 202 to slowly detach from the hoisting body 200, and the entire hoisting device is pulled out while the support arm 400 is naturally retracted.

[0070] Finally, the hoisting device completely detached from the borehole of the pile being hoisted, completing a full short pile hoisting and docking construction process.

[0071] The precast short pile hoisting device provided by this utility model has an upper connecting member 300 for connecting to a lifting device. The upper connecting member 300 is used to connect to a lifting device. The hoisting body 200 is equipped with support arms 400. When the hoisting body 200 is inserted into the precast short pile 100, multiple support arms 400 retract towards the hoisting body 200. When the support arms 400 protrude from the lower end of the precast short pile 100, the multiple support arms 400 spread out, and the support plates on the support arms 400 abut against the lower end face of the precast short pile 100. Thus, the precast short pile 100 can be lifted by the lifting device. When the precast short pile 100 is moved to… The hoisting body 200 is inserted into the upper end of the precast short pile 100 to be connected. The lateral pressure generated by the contact between the inner wall of the precast short pile 100 and the support arm 400 causes the support arm 400 to retract, so that the hoisting body 200 can be pulled out from the precast short pile 100. This completes the hoisting of one precast short pile 100. This improves the efficiency of hoisting the precast short pile 100, and the multiple support plates at the lower end of the precast short pile 100 make it less likely for cracks to occur. It improves operational efficiency and construction safety, and is particularly suitable for repeated hoisting, large-scale, and high-frequency construction scenarios.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A precast short pile hoisting device, characterized in that, The system includes a hoisting body (200), an upper connector (300) is provided at the upper end of the hoisting body (200), and a plurality of support arms (400) are provided at the lower end of the hoisting body (200). One end of each support arm (400) is hinged to the hoisting body (200), and the other end is provided with a support plate. The support plate is used to abut against the lower end face of the precast short pile (100). A return spring (600) is provided between the support arm (400) and the hoisting body (200).

2. The precast short pile hoisting device according to claim 1, characterized in that, The hoisting body (200) includes a telescopic outer sleeve (201) and a telescopic boom (202), one end of which is mounted on the telescopic outer sleeve (201); The upper connector (300) is disposed on the telescopic outer sleeve (201), and the support arm (400) is disposed on the telescopic rod (202).

3. The precast short pile hoisting device according to claim 2, characterized in that, The lower end of the telescopic outer tube (201) is provided with a plurality of limiting extension rods (500), and the limiting extension rods (500) are evenly arranged along the periphery of the telescopic outer tube (201). Multiple limiting through holes (502) are provided along the length of the limiting extension rod (500), and multiple limiting slots (2021) are provided along the length of the telescopic rod (202); at least one of the limiting through holes (502) corresponds to one of the limiting slots (2021); a limiting bolt (501) is fitted on the limiting through hole (502), and the limiting bolt (501) is inserted into the limiting slot (2021).

4. The precast short pile hoisting device according to claim 3, characterized in that, The limiting slot (2021) is an annular groove.

5. The precast short pile hoisting device according to claim 3, characterized in that, An auxiliary pulley (110) is provided on the upper end surface of the support plate, and the support plate abuts against the precast short pile (100) through the auxiliary pulley (110); The lower end face of the support plate is provided with a main pulley (900), which is used to abut against the inner wall of the precast short pile (100).

6. The precast short pile hoisting device according to claim 1, characterized in that, It also includes a linkage mechanism (700), one end of which is connected to the support arm (400) and the other end is connected to the hoisting body (200); Furthermore, a linkage mechanism (700) is provided between each of the support arms (400) and the hoisting body (200).

7. The precast short pile hoisting device according to claim 1, characterized in that, The upper connector (300) is a lifting ring.

8. The precast short pile hoisting device according to claim 1, characterized in that, The hoisting body (200) is provided with four support arms (400), which are evenly arranged along the periphery of the hoisting body (200).

9. The precast short pile hoisting device according to claim 1, characterized in that, It also includes multiple limiting blocks (800), which are assembled between the support arm (400) and the hoisting body (200) and are used to maintain a fixed interval between the support arm (400) and the hoisting body (200).

10. The precast short pile hoisting device according to claim 9, characterized in that, Multiple limiting blocks (800) are spliced ​​into a ring and locked between the support arm (400) and the hoisting body (200).

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