Concrete precast unit hoist
By designing a lifting device for precast concrete components that does not require pre-embedded lifting nails, and using mounting plates, wire ropes, and fixing mechanisms, the structural damage caused by pre-embedded holes was solved, achieving stable lifting and improved construction efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHUZHOU MODERN CONSTR TECH CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-14
AI Technical Summary
In existing technologies, when precast concrete components are hoisted, the embedded lifting nails form through or non-through embedded holes, which damages the structural integrity, requires subsequent repairs, increases construction costs and time, and affects durability and safety.
A concrete precast component lifting device was designed, which uses an installation plate, wire rope, adjustment mechanism and fixing mechanism. The concrete precast component is fixed by hooks, lifting belts and limit rings, and can be directly lifted to the required position without the need for pre-embedded lifting nails.
It enables hoisting without the need for pre-embedded holes, simplifies the construction process, saves manpower and resources, avoids repair steps, and ensures the structural integrity and safety of precast components.
Smart Images
Figure CN224493436U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lifting tools, specifically relating to a lifting tool for precast concrete components. Background Technology
[0002] In the process of modern industrialized construction, precast concrete components are widely used in various construction projects, including residential, municipal, and transportation projects, due to their advantages such as high production efficiency, stable quality, energy saving, and environmental protection. The hoisting of precast concrete components is a crucial link in their production, transportation, and on-site installation, directly affecting construction safety, efficiency, and the integrity of the precast components. To achieve safe hoisting of precast concrete components, the industry generally adopts a method of coordinating lifting tools with lifting points on the precast components. Currently, commonly used lifting tools include duckbill lifting tools, universal lifting spikes, hooks, and clamp-type lifting tools. Among these, the combination of duckbill lifting tools and pre-embedded lifting spikes is widely used in the hoisting of precast components such as walls and stairs due to its reliable connection and convenient operation.
[0003] Specifically, this hoisting method involves pre-embedding lifting nails during the production of precast concrete components to create dedicated lifting points. During transport, the duckbill portion of a duckbill lifting device is inserted into the outer end of the pre-embedded nails, and the device's own structure automatically locks in place during lifting, thus completing the hoisting and transfer of the precast component. However, the pre-embedded nails create through or non-through holes in the precast concrete components. After hoisting, these holes can compromise the original structural integrity of the precast components. To ensure the structural strength and performance of the precast concrete components, these holes must be filled and repaired later. This not only increases the construction process, consuming additional manpower, resources, and time, and extending the construction period, but also, if the repair quality is not properly controlled, it may lead to stress concentration, cracks, and other problems at the pre-embedded holes, affecting the durability and safety of the precast components and posing a potential threat to the overall quality of the building project.
[0004] Therefore, there is an urgent need for a lifting device for precast concrete components that does not require pre-embedded holes. Utility Model Content
[0005] (1) Technical problems to be solved
[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a concrete precast component lifting tool. This tool aims to solve the problem that existing technologies often create through-holes or non-through-holes in precast concrete components due to embedded lifting nails. These holes, after lifting operations, can damage the original structural integrity of the precast component. To ensure the structural strength and performance of the precast concrete component, these holes must be filled and repaired later. This not only increases the construction process, consuming additional manpower, resources, and time, and prolonging the construction period, but also, if the repair quality is not properly controlled, it can lead to stress concentration, cracks, and other problems at the embedded holes, affecting the durability and safety of the precast component and posing a hidden danger to the overall quality of the building project.
[0007] (2) Technical solution
[0008] To solve the above-mentioned technical problems, this utility model provides a concrete precast component lifting device, including an installation plate. Steel wire ropes are installed at both the front and rear ends of the upper side of the installation plate. An adjustment mechanism is installed above the installation plate, and a fixing mechanism is installed below the installation plate. The fixing mechanism includes lifting straps fixedly connected at equal intervals to the lower front end of the installation plate. A hook is fixedly connected to the other end of each lifting strap. U-shaped hanging rods are welded at equal intervals on the upper side of the installation plate. Second threaded rods are installed at both the front and rear ends below the installation plate. A left baffle is installed at the left outer end of the second threaded rod, a left limiting ring is installed at the left side of the second threaded rod to the left of the left baffle, a right baffle is installed at the right outer end of the second threaded rod, and a right limiting ring is installed at the right side of the second threaded rod to the right of the right baffle.
[0009] Furthermore, the adjustment mechanism includes an adjustment ring disposed at the outer end of the wire rope, a U-shaped sleeve rod welded to the upper outer side of the adjustment ring, a first threaded rod connected to the upper end of the adjustment ring, and a rotating handle welded to the upper end of the first threaded rod.
[0010] Furthermore, the inner side of the hook is sleeved with the outer side of the upper end of the U-shaped hanging rod.
[0011] Furthermore, the lower end of the mounting plate is provided with a groove, and the left and right ends of the second threaded rod are fixedly connected to the left and right ends of the inner side of the groove. The inner sides of the left and right limiting rings are provided with internal threads, and the inner sides of the left and right limiting rings are threadedly connected to the outer side of the second threaded rod. The front and rear ends of the upper part of the left baffle are provided with sliding holes that pass through left and right. The outer side of the second threaded rod is slidably connected to the inner side of the sliding hole. The outer side of the upper end of the left and right baffles is slidably connected to the inner side of the groove.
[0012] Furthermore, the outer side of the lifting sling abuts against the outer end of the precast concrete component being lifted, the left side of the left baffle abuts against the right side of the left limiting ring, the right side of the left baffle abuts against the left end of the precast concrete component, the right side of the right baffle abuts against the left side of the right limiting ring, the left side of the right baffle abuts against the right end of the precast concrete component, and the lower side of the mounting plate abuts against the upper end of the precast concrete component.
[0013] Furthermore, a threaded hole is provided at the middle of the upper part of the inner side of the adjusting ring, and the outer side of the first threaded rod is threadedly connected to the inner side of the threaded hole.
[0014] Furthermore, the lower inner side of the adjusting ring is slidably connected to the outer side of the wire rope, and the lower end of the first threaded rod abuts against the upper outer side of the wire rope.
[0015] (3) Beneficial effects
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] This utility model, through the setting of a fixing mechanism, allows for the hoisting of precast concrete components. First, the mounting plate is moved above the precast concrete component to be hoisted. Then, the hook passes through the bottom of the precast concrete component and is fitted onto the outer end of the U-shaped hanging rod at the corresponding position above the mounting plate, tightening the hoisting strap around the outer end of the precast concrete component. Next, the left and right baffles are moved to the left and right ends of the precast concrete component respectively. Then, the left and right limiting rings are rotated, moving them to the left side of the left baffle and the right side of the right baffle respectively, fixing the left and right baffles to the left and right ends of the precast concrete component. This secures the precast concrete component between the mounting plate, hoisting strap, left baffle, and right baffle. Finally, the hoisting device can be suspended to hoist the precast concrete component to the desired position without the need for pre-embedded hoisting nails, thus eliminating the need for subsequent repairs.
[0018] This utility model, by setting an adjustment mechanism, allows the center of gravity of the lifting device to change when it is suspended after the adjustment ring is slid to different positions on the outside of the wire rope and fixed. Thus, when fixing different shaped precast concrete components at the lower end of the mounting plate, the lifting device can maintain stable suspension by adjusting the center of gravity when suspending different precast concrete components. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the structure of the adjustment mechanism of this utility model;
[0022] Figure 3 This is a schematic diagram of the lower end structure of the mounting plate of this utility model;
[0023] Figure 4 This is a schematic diagram of the structure at the outer end of the mounting plate of this utility model;
[0024] Figure 5 This is a schematic diagram of the structure at the outer end of the second threaded rod of this utility model.
[0025] The markings in the attached diagram are as follows: 1. Mounting plate; 2. Steel wire rope; 301. Adjusting ring; 302. U-shaped sleeve rod; 303. First threaded rod; 304. Rotating handle; 401. Lifting sling; 402. Hook; 403. U-shaped hanging rod; 404. Second threaded rod; 405. Left baffle; 406. Left limit ring; 407. Right baffle; 408. Right limit ring. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] This specific embodiment is a lifting device for precast concrete components, and its structural schematic diagram is shown below. Figure 1 and Figure 2 As shown, the system includes a mounting plate 1. Steel wire ropes 2 are mounted on the front and rear ends of the upper side of the mounting plate 1. An adjustment mechanism is located above the mounting plate 1. The adjustment mechanism includes an adjustment ring 301 located at the outer end of the steel wire ropes 2. A U-shaped sleeve rod 302 is welded to the upper outer end of the adjustment ring 301. A first threaded rod 303 is connected to the upper end of the adjustment ring 301. A threaded hole is formed at the middle of the upper inner end of the adjustment ring 301. The outer side of the first threaded rod 303 is threaded to the inner side of the threaded hole. A rotating handle 304 is welded to the upper end of the first threaded rod 303. The lower inner side of the adjustment ring 301 is slidably connected to the outer side of the steel wire rope 2, and the lower end of the first threaded rod 303 abuts against the upper outer side of the steel wire rope 2. Rotating the rotating handle 304 causes the first threaded rod 303 to rotate within the threaded hole and move downwards until the steel wire rope 2 is pressed against the inner side of the adjustment ring 301, thus fixing the steel wire rope 2 and the adjustment ring 301 relatively.
[0028] Cooperate Figure 3 and Figure 5 As shown, a fixing mechanism is provided below the mounting plate 1, and the fixing mechanism includes a lifting strap 401 fixedly connected at equal intervals to the lower front end of the mounting plate 1. The other end of the lifting strap 401 is fixedly connected to a hook 402. U-shaped hanging rods 403 are welded at equal intervals on the upper side of the mounting plate 1. The inner side of the hook 402 is sleeved with the outer side of the upper end of the U-shaped hanging rod 403. The mounting plate 1 has a second threaded rod 404 at both ends below it. A left baffle 405 is provided at the left end of the second threaded rod 404. A left limiting ring 406 is provided at the left end of the second threaded rod 404 to the left of the left baffle 405. A right baffle 407 is provided at the right end of the second threaded rod 404. The mounting plate 1 has a groove at its lower end. The left and right ends of the second threaded rod 404 are fixedly connected to the left and right ends of the groove. The left limiting ring 406 and the right limiting ring 408 have internal threads on their inner sides. The inner sides of the left limiting ring 406 and the right limiting ring 408 are threadedly connected to the outer side of the second threaded rod 404. The left baffle 405 has a sliding hole that runs through the left and right sides at both ends above its upper interior. The outer side of the second threaded rod 404 is slidably connected to the inner side of the sliding hole. The outer side of the upper end of the left baffle 405 and the right baffle 407 is slidably connected to the inner side of the groove. A right limiting ring 408 is provided on the outer side of the second threaded rod 404, located to the right of the right baffle 407. The outer side of the lifting belt 401 abuts against the outer end of the precast concrete component being lifted, the left side of the left baffle 405 abuts against the right side of the left limiting ring 406, the right side of the left baffle 405 abuts against the left end of the precast concrete component, the right side of the right baffle 407 abuts against the left side of the right limiting ring 408, the left side of the right baffle 407 abuts against the right end of the precast concrete component, and the lower side of the mounting plate 1 abuts against the upper end of the precast concrete component. Therefore, when hoisting precast concrete components, the installation plate 1 is first moved above the precast concrete component to be hoisted. Then, the hook 402 is passed through the bottom of the precast concrete component and then fitted onto the outer end of the U-shaped hanging rod 403 at the corresponding position above the installation plate 1, so that the hoisting strap 401 is tightly fitted to the outer end of the precast concrete component. Next, the left baffle 405 and the right baffle 407 are moved to the left and right ends of the precast concrete component respectively, and then the left limiting ring 406 and the right limiting ring 408 are rotated. This allows the components to move to the left side of the left baffle 405 and the right side of the right baffle 407, respectively. The left baffle 405 and the right baffle 407 are then fixed to the left and right ends of the precast concrete component. This allows the precast concrete component to be fixed between the mounting plate 1, the lifting belt 401, the left baffle 405, and the right baffle 407. The precast concrete component can then be hoisted to the required position by suspending the lifting device. There is no need to pre-embed lifting nails in the precast concrete component, and therefore no need to repair the precast concrete component afterward.
[0029] Working principle: When hoisting precast concrete components, first move the mounting plate 1 above the precast concrete component to be hoisted, then pass the hook 402 through the bottom of the precast concrete component, and then put it on the outer end of the U-shaped hanging rod 403 at the corresponding position above the mounting plate 1, so that the hoisting strap 401 is tightly fitted to the outer end of the precast concrete component. Next, move the left baffle 405 and the right baffle 407 to the left and right ends of the precast concrete component respectively, and then rotate the left limiting ring 406 and the right limiting ring 408 so that they move to the left side of the left baffle 405 and the right side of the right baffle 407 respectively, fixing the left baffle 405 and the right baffle 407 to the left and right ends of the precast concrete component, thereby fixing the precast concrete component between the mounting plate 1, the hoisting strap 401, the left baffle 405 and the right baffle 407. Then, use the crane hook to lift the U-shaped hanging rod 302, lift the whole hoisting device, and hoist the precast concrete component.
[0030] All technical features in this embodiment can be freely combined according to actual needs.
[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A lifting device for precast concrete components, comprising a mounting plate (1), characterized in that, The mounting plate (1) has steel wire ropes (2) at both the front and rear ends on its upper side. An adjustment mechanism is provided above the mounting plate (1), and a fixing mechanism is provided below the mounting plate (1). The fixing mechanism includes lifting straps (401) fixedly connected at equal intervals to the lower front end of the mounting plate (1). A hook (402) is fixedly connected to the other end of the lifting straps (401). U-shaped hanging rods (403) are welded at equal intervals on the upper side of the mounting plate (1). The front and rear ends of the lower part are provided with a second threaded rod (404). A left baffle (405) is provided on the left side of the second threaded rod (404). A left limiting ring (406) is provided on the left side of the second threaded rod (404) to the left of the left baffle (405). A right baffle (407) is provided on the right side of the second threaded rod (404). A right limiting ring (408) is provided on the right side of the second threaded rod (404) to the right of the right baffle (407).
2. The concrete precast component lifting tool according to claim 1, characterized in that, The adjustment mechanism includes an adjustment ring (301) disposed at the outer end of the wire rope (2), a U-shaped sleeve rod (302) is welded to the upper outer side of the adjustment ring (301), a first threaded rod (303) is connected to the upper end of the adjustment ring (301), and a rotating handle (304) is welded to the upper end of the first threaded rod (303).
3. The concrete precast component lifting tool according to claim 1, characterized in that, The inner side of the hook (402) is sleeved with the outer side of the upper end of the U-shaped hanging rod (403).
4. A precast concrete component lifting device according to claim 1, characterized in that, The mounting plate (1) has a groove at its lower end. The left and right ends of the second threaded rod (404) are fixedly connected to the left and right ends of the groove. The left limiting ring (406) and the right limiting ring (408) have internal threads on their inner sides. The inner sides of the left limiting ring (406) and the right limiting ring (408) are threadedly connected to the outer side of the second threaded rod (404). The left baffle (405) has sliding holes that pass through the left and right sides at its upper front and rear ends. The outer side of the second threaded rod (404) is slidably connected to the inner side of the sliding hole. The outer side of the upper end of the left baffle (405) and the right baffle (407) is slidably connected to the inner side of the groove.
5. A precast concrete component lifting device according to claim 1, characterized in that, The outer side of the hoisting belt (401) abuts against the outer end of the hoisted precast concrete component, the left side of the left baffle (405) abuts against the right side of the left limiting ring (406), the right side of the left baffle (405) abuts against the left end of the precast concrete component, the right side of the right baffle (407) abuts against the left side of the right limiting ring (408), the left side of the right baffle (407) abuts against the right end of the precast concrete component, and the lower side of the mounting plate (1) abuts against the upper end of the precast concrete component.
6. A precast concrete component lifting device according to claim 2, characterized in that, The adjusting ring (301) has a threaded hole that runs vertically through the middle of its upper end, and the outer side of the first threaded rod (303) is threadedly connected to the inner side of the threaded hole.
7. A precast concrete component lifting device according to claim 6, characterized in that, The lower inner side of the adjusting ring (301) is slidably connected to the outer side of the wire rope (2), and the lower end of the first threaded rod (303) abuts against the upper outer side of the wire rope (2).