A hoisting structure for precast concrete components

Abstract

This utility model relates to a hoisting structure for precast concrete components, belonging to the field of hoisting technology. The hoisting structure includes hoisting slots and lifting devices; multiple hoisting slots are formed on the sidewalls of the precast concrete component, with the bottom surfaces of the slots inclined from high to low from the inside out, and the slots are symmetrically arranged relative to the precast concrete component; the lifting devices include a lifting frame for connecting a crane, a hook, and ropes; the hook has a hook portion for inserting into the hoisting slot to hook onto the top surface of the slot, with a space between the bottom surface of the hook portion and the bottom surface of the hoisting slot when the hook portion is hooked onto the top surface of the slot; the bottom surface of the hook portion is inclined to allow sliding engagement with the bottom surface of the hoisting slot, causing the hook portion to slide out of the hoisting slot along the bottom surface. This hoisting structure for precast concrete components is simple in structure, low in cost, and can quickly achieve automatic unhooking, improving hoisting efficiency while maintaining low-cost construction.

Description

Technical Field

[0001] This utility model belongs to the field of hoisting technology, and in particular relates to a hoisting structure for precast concrete components. Background Technology

[0002] Precast concrete components are increasingly widely used in engineering due to their advantages such as precise quality control, less on-site construction, high construction efficiency, and low construction costs. Especially in waterway engineering, the use of precast concrete components can reduce the amount of on-site concrete work and overcome the limitations of on-site concrete construction in water-based projects, due to factors such as tides.

[0003] Because precast concrete components are manufactured in different locations, their transportation to the construction site typically requires multiple hoisting operations, and their assembly also involves a significant amount of hoisting work. Therefore, the requirements for hoisting operations of precast concrete components are constantly increasing in terms of safety, ease of hook operation, and economic efficiency. Patent CN220056020U discloses an automatic unhooking hanger, which, through the coordinated operation of a crossbeam, connecting rod, and hook, can cooperate with a pre-installed lifting point box within the precast concrete component to achieve automatic unhooking during the hoisting process. However, the structure required for this automatic unhooking hanger to achieve automatic unhooking remains relatively complex, and the manufacturing cost of the hanger is high.

[0004] Therefore, how to provide a lifting structure that is easy to automatically unhook and economical, suitable for lifting operations of precast concrete components, is a technical problem that urgently needs to be solved. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a hoisting structure for precast concrete components. This structure is simple, low-cost, and can quickly achieve automatic unhooking, thereby improving the hoisting efficiency of precast concrete components while maintaining low-cost construction.

[0006] This utility model provides a hoisting structure for precast concrete components, comprising: Multiple lifting slots are provided on the side wall of the precast concrete component. The bottom surface of the lifting slots is inclined from high to low from the inside to the outside. The multiple lifting slots are symmetrically arranged with respect to the precast concrete component. The lifting device includes a lifting frame for connecting a crane, hooks corresponding to lifting slots, and ropes connecting the hooks and the lifting frame. The hooks have a hook portion for inserting into the lifting slots to hook onto the top surface of the lifting slots. When the hook portion is hooked onto the top surface of the lifting slots, there is a space between the bottom surface of the hook portion and the bottom surface of the lifting slots. The end of the hook portion extending into the lifting slot is designated as the first end, and the end of the hook portion located at the outer end of the lifting slot is designated as the second end. The bottom surface of the hook portion is inclined from high to low from the first end to the second end to slide and engage with the bottom surface of the lifting slots so that the hook portion slides out of the lifting slots along the bottom surface of the lifting slots.

[0007] In some embodiments, the angle of inclination of the bottom surface of the hook relative to the horizontal plane is smaller than the angle of inclination of the bottom surface of the lifting groove relative to the horizontal plane.

[0008] In some embodiments, the bottom surface of the lifting trough is inclined at an angle of 45° to 55° relative to the horizontal plane, and the bottom surface of the hook is inclined at an angle of 35° to 45° relative to the horizontal plane.

[0009] In some embodiments, the top surface of the hoisting slot is inclined from high to low from the inside out, and the top surface of the hook matches the top surface of the hoisting slot so that it fits against the top surface of the hoisting slot when the hook is hooked on the top surface of the hoisting slot. The inclination angle of the top surface of the hoisting slot relative to the horizontal plane is smaller than the inclination angle of the bottom surface of the hoisting slot relative to the horizontal plane.

[0010] In some embodiments, the top surface of the hoisting trough is tilted at an angle of 5° to 10° relative to the horizontal plane.

[0011] In some embodiments, the hook further includes a connecting portion, one side of which is a planar abutment surface extending vertically, a second end of the hook is connected to the abutment surface of the connecting portion, and the top end of the connecting portion is connected to a rope; when the hook is hooked to the top surface of the lifting slot, the abutment surface of the connecting portion, except for the connecting hook portion, abuts against the side wall surface of the precast concrete component.

[0012] In some embodiments, the top surface of the hoisting slot is provided with a chamfered edge where it intersects with the side wall of the precast concrete component, and a transitional connection is provided between the top surface of the hook and the abutting surface of the connecting part for matching and fitting with the chamfered edge.

[0013] In some embodiments, the chamfer is a C-shaped chamfer, and the bevel angle of the C-shaped chamfer is 40°~50°.

[0014] In some embodiments, multiple lifting slots are symmetrically arranged on two opposite side walls of the precast concrete component, and multiple lifting slots are evenly distributed on each side wall; the lifting frame includes a square frame, and hooks corresponding to the lifting slots are symmetrically connected to two opposite sides of the square frame.

[0015] In some embodiments, the lifting trough is integrally formed into the sidewall of the precast concrete component.

[0016] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: 1. The hoisting structure for precast concrete components provided by this utility model has a hoisting slot in the precast concrete component, and the bottom surface of the hoisting slot is set as an inclined surface, which cooperates with the inclined bottom surface of the hook in the hoisting tool, realizing rapid automatic unhooking without complicating the structure of the hoisting tool. It improves the hoisting efficiency of precast concrete components while maintaining low-cost construction of hoisting operations. 2. The hoisting structure for precast concrete components provided by this utility model adopts the method of opening a hoisting groove on the side wall of the precast concrete component, which avoids the problems of positioning difficulties, affecting the quality of concrete pouring, and affecting the appearance of precast concrete components that exist in traditional pre-embedded hoisting points. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 A schematic diagram of a hoisting structure for precast concrete components in a hoisting state, provided as an embodiment of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 A schematic diagram of a hoisting structure for precast concrete components in the unhooked state, provided as an embodiment of the present invention; Figure 4 for Figure 5 A magnified view of a section at point B in the middle; Figure 5 A schematic diagram of the structure of a precast concrete component in a hoisting structure for precast concrete components provided in one embodiment of this utility model; Figure 6 For along Figure 5 A cross-sectional view of the CC line; Figure 7 for Figure 6 A magnified view of a section at point D; Figure 8 A schematic diagram of the lifting device in a hoisting structure for precast concrete components provided in one embodiment of this utility model; Figure 9 This is a schematic diagram of the hook structure in a hoisting structure for precast concrete components, provided as an embodiment of the present invention.

[0018] In the picture: 1. Precast concrete components; 2. Lifting troughs; 3. Lifting equipment; 21. Chamfered edge; 31. Hook; 311. Hook part; 312. Connecting part; 313. Transition connecting part; 32. Rope; 33. Lifting frame; 34. Lifting ring; a. Space; b. First end; c. Second end; d. Abutting surface. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] As attached Figures 1-9As shown in an illustrative embodiment of the hoisting structure for precast concrete component 1 of this utility model, the hoisting structure for precast concrete component 1 includes hoisting slots 2 and lifting devices 3; there are multiple hoisting slots 2, which are opened on the side wall of the precast concrete component 1, and the bottom surface of the hoisting slots 2 is inclined from high to low from the inside to the outside, and the multiple hoisting slots 2 are symmetrically arranged with respect to the precast concrete component 1; the lifting device 3 includes a lifting frame 33 for connecting a crane, hooks 31 corresponding to the hoisting slots 2 one by one, and ropes 3 connecting the hooks 31 and the lifting frame 33. 2; The hook 31 has a hook portion 311 for inserting into the lifting groove 2 to hook onto the top surface of the lifting groove 2. When the hook portion 311 is hooked onto the top surface of the lifting groove 2, there is a space a between the bottom surface of the hook portion 311 and the bottom surface of the lifting groove 2. The end of the hook portion 311 that extends into the lifting groove 2 is the first end b, and the end of the hook portion 311 that is located at the outer end of the lifting groove 2 is the second end c. The bottom surface of the hook portion 311 is inclined from high to low from the first end b to the second end c, so as to slide and cooperate with the bottom surface of the lifting groove 2 so that the hook portion 311 slides out of the lifting groove 2 along the bottom surface of the lifting groove 2.

[0023] The working principle of the hoisting structure used for the precast concrete component 1 is as follows: Figure 1 and Figure 2 As shown, during hoisting, the hook 311 of the hook 31 is inserted into the hoisting slot 2, and the lifting frame 33 is lifted by the crane. The lifting frame 33 provides tension to the hook 31 through the rope 32, so that the hook 311 of the hook 31 hooks onto the top surface of the hoisting slot 2, achieving stable hoisting; when the hoisting is in place, as... Figure 3 and Figure 4 As shown, the crane lowers the height of the lifting frame 33. As the height of the lifting frame 33 decreases, the hook 31 also decreases, causing the hook part 311 of the hook 31 to descend within the lifting groove 2 until the bottom surface of the hook part 311 contacts the bottom surface of the lifting groove 2. Since both the bottom surface of the lifting groove 2 and the bottom surface of the hook part 311 are inclined slopes, the hook part 311 of the hook 31 will slide downward along the bottom surface of the lifting groove 2, thereby causing the hook part 311 of the hook 31 to disengage from the lifting groove 2, achieving automatic disengagement.

[0024] The aforementioned hoisting structure for precast concrete component 1 features a hoisting slot 2 on the precast concrete component 1, with the bottom surface of the slot 2 being inclined. This inclined surface mates with the inclined bottom surface of the hook 311 in the lifting device 3, enabling rapid and automatic unhooking without complicating the structure of the lifting device 3. This improves the hoisting efficiency of the precast concrete component 1 while maintaining low-cost construction. Furthermore, the hoisting structure for precast concrete component 1 utilizes a hoisting slot 2 on the side wall of the precast concrete component 1, avoiding the problems of positioning difficulties, impact on concrete pouring quality, and negatively affecting the aesthetic appearance of the precast concrete component 1 associated with traditional pre-embedded hoisting points.

[0025] like Figure 2 and Figure 4 As shown, the angle of inclination of the bottom surface of the hook 311 relative to the horizontal plane is smaller than the angle of inclination of the bottom surface of the lifting groove 2 relative to the horizontal plane. This arrangement ensures that when the hook 311 descends within the lifting groove 2, its first end b first contacts the bottom surface of the lifting groove 2. Furthermore, as the hook 311 continues to descend, it will flip downwards until its bottom surface is in contact with the bottom surface of the lifting groove 2, thereby causing the hook 31 to be in an outward tilted state, which facilitates the hook 31's disengagement from the lifting groove 2.

[0026] Preferably, the bottom surface of the lifting groove 2 has an inclination angle of 45° to 55° relative to the horizontal plane, and the bottom surface of the hook 311 has an inclination angle of 35° to 45° relative to the horizontal plane. Setting the inclination angle of the bottom surface of the lifting groove 2 within the range of 45° to 55° avoids excessive resistance to unhooking due to an excessively small inclination angle, while also preventing the hook 311 from slipping out of the lifting groove 2 during lifting due to an excessively large inclination angle. This preferred range of inclination angles for the bottom surface of the lifting groove 2 balances the reliability of automatic unhooking with the safety of lifting. Furthermore, setting the inclination angle of the bottom surface of the hook 311 within the range of 35° to 45° relative to the horizontal plane allows for better coordination with the bottom surface of the lifting groove 2.

[0027] like Figure 2 , Figure 7 and Figure 9 As shown, the top surface of the lifting trough 2 is inclined from high to low from the inside out. The top surface of the hook 311 matches the top surface of the lifting trough 2 so that it adheres to the top surface of the lifting trough 2 when hooked. The inclination angle of the top surface of the lifting trough 2 relative to the horizontal plane is smaller than the inclination angle of the bottom surface of the lifting trough 2 relative to the horizontal plane. By setting the top surface of the lifting trough 2 as an inclined surface, it is beneficial to avoid the risk of the hook 311 slipping off the lifting trough 2 during the lifting process, thereby preventing accidental disengagement due to swinging during the lifting process and improving the lifting stability. At the same time, setting the top surface of the hook 311 to match the top surface of the lifting trough 2 so that it adheres to the top surface of the lifting trough 2 when hooked, so that the top surface of the hook 311 and the top surface of the lifting trough 2 form a surface contact during the lifting process, which is beneficial to distribute the lifting load and reduce the risk of damage caused by local compressive stress concentration in the concrete.

[0028] Preferably, the inclination angle of the top surface of the lifting slot 2 relative to the horizontal plane is in the range of 5° to 10°. Setting the inclination angle of the top surface of the lifting slot 2 relative to the horizontal plane within the range of 5° to 10° can avoid the risk of the hook 311 slipping out of the lifting slot 2 during lifting due to the inclination angle of the top surface of the lifting slot 2 being too small. At the same time, it can avoid problems such as excessive local stress on the top surface of the lifting slot 2 or inconvenience in the processing of the lifting slot 2 due to the inclination angle of the top surface of the lifting slot 2 being too large. The above-mentioned preferred inclination angle range of the top surface of the lifting slot 2 can take into account both the safety of lifting and the feasibility of processing the lifting slot 2.

[0029] like Figure 2 , Figure 7 and Figure 9 As shown, the inner end of the top surface of the lifting groove 2 and the inner end of the bottom surface of the lifting groove 2 are smoothly connected by an arc surface. The end of the hook 311 that is inserted into the inner end of the lifting groove 2 has an arc surface to match the shape of the inner end of the lifting groove 2. This design of the lifting groove 2 can eliminate stress concentration points at the inner end of the lifting groove 2 and prevent cracks from forming due to stress concentration. At the same time, the arc surface matching design of the end of the hook 311 not only facilitates the insertion of the hook 311 into the lifting groove 2, improving the convenience of hooking operation, but also prevents the hook 311 from getting stuck in the lifting groove 2 when it is detached, which helps to improve the reliability of automatic hooking.

[0030] like Figure 9 As shown, the hook 31 also includes a connecting portion 312. One side of the connecting portion 312 is a vertically extending and planar abutment surface d. The second end c of the hook portion 311 is connected to the abutment surface d of the connecting portion 312 and is located near the bottom end of the connecting portion 312. The top end of the connecting portion 312 is connected to the rope 32. When the hook portion 311 is hooked on the top surface of the lifting slot 2, the abutment surface d of the connecting portion 312 abuts against the side wall of the precast concrete component 1. By having the abutment surface d of the connecting portion 312 adhere to the side wall of the precast concrete component 1, a rigid support can be formed for the precast concrete component 1, offsetting the horizontal component force generated by the tension of the rope 32 during lifting, reducing the swing amplitude of the rope 32 during lifting, and improving the stability and safety of lifting. Preferably, the height of the connecting portion 312 of the hook 31 satisfies the following condition: when the hook portion 311 of the hook 31 is hooked on the top surface of the lifting slot 2, the top end of the connecting portion 312 of the hook 31 is higher than the top surface of the precast concrete component 1. The connection part 312 with the above-mentioned height design can make the part of the side wall of the precast concrete component 1 above the hoisting groove 2 fit with the abutment surface d of the connection part 312, which is beneficial to improving hoisting stability and safety.

[0031] like Figure 2 , Figure 7 and Figure 9As shown, the top surface of the lifting trough 2 intersects with the side wall of the precast concrete component 1 at a chamfered edge 21. A transition connecting part 313 for matching and fitting with the chamfered edge 21 is connected between the top surface of the hook 311 and the abutting surface d of the connecting part 312. By matching and fitting the chamfered edge 21 of the lifting trough 2 with the transition connecting part 313 of the hook 31, the line contact between the hook part 311 of the hook 31 and the edge of the top surface of the lifting trough 2 can be eliminated, the contact area can be increased, and the risk of crushing of the edge of the precast concrete component 1 can be reduced. At the same time, by connecting the hook part 311 and the connecting part 312 through the transition connecting part 313, the shear force at the connection between the hook part 311 and the connecting part 312 can be reduced, and the risk of deformation of the hook part 311 can be reduced. This is especially suitable for lifting scenarios of large precast concrete components 1.

[0032] Preferably, the chamfered portion 21 is a C-shaped chamfer, and the inclination angle of the C-shaped chamfer is in the range of 40° to 50°. Using the C-shaped chamfer with the above-mentioned preferred inclination angle is more conducive to dispersing the stress of the chamfered portion 21.

[0033] like Figure 5 and Figure 6 As shown, multiple lifting slots 2 are symmetrically arranged on two opposite side walls of the precast concrete component 1, with multiple lifting slots 2 evenly distributed on each side wall; as Figure 8 As shown, the lifting frame 33 includes a square frame, with hooks 31 symmetrically connected to the two opposite sides of the square frame, corresponding to the lifting slot 2. This design of the lifting slot 2 and the lifting device 3 achieves multi-point uniform force distribution, which helps to improve the stability and safety of the lifting operation.

[0034] In addition, regarding the processing of the hoisting groove 2, it should be noted that a protrusion for forming the hoisting groove 2 is provided on the mold for casting the precast concrete component 1, so that the hoisting groove 2 is integrally formed on the side wall of the precast concrete component 1. This can avoid structural damage to the precast concrete component 1 caused by subsequent grooving, and at the same time simplify the processing flow of the hoisting groove 2.

[0035] In addition, regarding the lifting frame 33, it should be noted that, as Figure 8 As shown, the lifting frame 33 also includes a lifting ring 34 for connecting the crane, the lifting ring 34 being connected to the top of the lifting frame 33.

[0036] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0037] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A hoisting structure for a concrete precast member, characterized by, include: Multiple lifting slots are provided, which are located on the side wall of the precast concrete component. The bottom surface of the lifting slots is inclined from high to low from the inside to the outside. The multiple lifting slots are symmetrically arranged with respect to the precast concrete component. The lifting device includes a lifting frame for connecting a crane, hooks corresponding to the lifting slots, and ropes connecting the hooks and the lifting frame. The hooks have a hook portion for inserting into the lifting slots to hook onto the top surface of the lifting slots. When the hook portion is hooked onto the top surface of the lifting slots, a space is left between the bottom surface of the hook portion and the bottom surface of the lifting slots. The end of the hook portion extending into the lifting slot is designated as the first end, and the end of the hook portion located outside the lifting slot is designated as the second end. The bottom surface of the hook portion is inclined from high to low from the first end to the second end, so as to slide and engage with the bottom surface of the lifting slots, allowing the hook portion to slide out of the lifting slots along the bottom surface of the lifting slots.

2. The hoisting structure for a concrete precast member according to claim 1, characterized by, The angle of inclination of the bottom surface of the hook relative to the horizontal plane is smaller than the angle of inclination of the bottom surface of the hoisting groove relative to the horizontal plane.

3. The hoisting structure for a concrete precast member according to claim 2, characterized by, The bottom surface of the hoisting trough has an inclination angle of 45° to 55° relative to the horizontal plane, and the bottom surface of the hook has an inclination angle of 35° to 45° relative to the horizontal plane.

4. A lifting arrangement for a precast concrete element according to any one of claims 1-3, characterized in that, The top surface of the hoisting slot is inclined from high to low from the inside to the outside. The top surface of the hook matches the top surface of the hoisting slot so that it fits against the top surface of the hoisting slot when the hook is hooked. The inclination angle of the top surface of the hoisting slot relative to the horizontal plane is smaller than the inclination angle of the bottom surface of the hoisting slot relative to the horizontal plane.

5. The hoisting structure for a concrete precast member according to claim 4, characterized by The top surface of the hoisting trough has an inclination angle of 5° to 10° relative to the horizontal plane.

6. The hoisting structure for precast concrete components according to claim 1, characterized in that, The hook also includes a connecting part, one side of which is a planar abutment surface extending vertically. The second end of the hook is connected to the abutment surface of the connecting part, and the top end of the connecting part is connected to the rope. When the hook is hooked onto the top surface of the hoisting slot, the abutment surface of the connecting part, except for the part connected to the hook, abuts against the side wall of the precast concrete component.

7. The hoisting structure for a concrete precast member according to claim 6, characterized by The top surface of the hoisting slot has a chamfered edge where it intersects with the side wall of the precast concrete component, and a transition connection is provided between the top surface of the hook and the abutting surface of the connecting part for matching and fitting with the chamfered edge.

8. The hoisting structure for a concrete precast member according to claim 7, characterized by The chamfered portion is a C-shaped chamfer, and the inclination angle of the C-shaped chamfer is 40°~50°.

9. The hoisting structure for a concrete precast member according to claim 1, characterized by, Multiple lifting slots are symmetrically arranged on two opposite side walls of the precast concrete component, and multiple lifting slots are evenly distributed on each side wall; the lifting frame includes a square frame, and the hooks corresponding to the lifting slots are symmetrically connected to the two opposite sides of the square frame.

10. The hoisting structure for a concrete precast member according to claim 1 or 9, characterized by, The hoisting trough is integrally formed on the side wall of the precast concrete component.

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