Lifting appliance suitable for lifting concrete products with holes and lifting method
By designing a spreader suitable for holed concrete products, the contact between the pliers and the reserved holes of the components is solved, and the safety hazards and operational complexity of existing spreaders are solved when lifting large concrete products, achieving a more efficient and safe lifting process.
Patent Information
- Application Number
- CN202411995935.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-03-21
AI Technical Summary
When lifting large or large single-sided prefabricated concrete products, existing spreaders have difficulty in clamping and fixing operation, and safety hazards of overturning or flipping of components, which increases the difficulty and complexity of lifting.
设计了一种适用于带孔混凝土制品的吊具，通过钳牙伸入构件预留孔中，贴紧构件内表面，结合防脱落杆和吊钩孔，实现对构件的稳定夹持和紧固。
By increasing the contact area between the clamp teeth and the member, the spreader reduces the shaking of the member during the lifting process, avoids the risk of the member flip or overturning, and significantly improves the safety and efficiency of the lifting operation.
Smart Images
Figure CN119660533A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of lifting construction equipment, and in particular relates to a lifting device and a lifting method suitable for lifting a concrete product with a hole. Background Art
[0002] Prefabricated concrete structures have now become one of the important development directions in the field of modern engineering construction. Compared with traditional cast-in-place construction methods, prefabricated structures use factory-made prefabricated components that are transported to the site and then assembled. Thanks to the standardization and large-scale production of prefabricated components, prefabricated structures have many advantages, such as stable engineering quality, full recycling and reuse, and a wide range of applications for special-shaped structures. In addition to the above-mentioned characteristics in appearance, structure, and environment, its advantages in construction direction are more prominent: on the one hand, it can shorten the construction period, save manpower, and help further reduce the cost of engineering construction; on the other hand, due to the simple and fast construction process, it can reduce the negative impact of construction on the environment, and the interference of weather factors during construction is also small. While the technical advantages are significant, it follows the principle of sustainable development and can better respond to the "green construction" strategic planning advocated by the country, so the overall development and application prospects are broad.
[0003] At present, the prefabricated components of prefabricated structures are mainly concrete products. On-site hoisting is one of the important links in the construction method of this structure. Among them, the choice of hoisting tools mostly uses clamp-type clamps. The main principle is to use the clamp arm to mobilize the clamp teeth to clamp and tighten the two ends of the entire component inward, and then lift the component to complete the hoisting. However, when the overall volume or single-sided area of the component is large, not only is the clamping and fixing operation difficult, but there are also serious safety hazards such as component overturning and flipping, which greatly increases the difficulty and complexity of hoisting. The above problems cannot be fundamentally solved by simply increasing the clamping force of the clamp arm and the contact area between the clamp teeth and the component. The shape of prefabricated components usually needs to consider the design requirements of the construction project. Therefore, a considerable number of concrete products inevitably need to reserve intermediate holes during prefabrication. Using the reserved holes in prefabricated components for hoisting can effectively improve the simplicity and safety of operation. Summary of the invention
[0004] In view of the above problems, the present invention provides a hoisting device suitable for hoisting concrete products with holes, which improves the simplicity and safety of hoisting operations by using reserved holes in components.
[0005] The lifting device suitable for lifting the concrete product with holes comprises a clamp arm, clamp teeth, a pin shaft, an anti-falling rod and a hook hole; The clamp arm comprises a left clamp arm and a right clamp arm, and the single body structure is a V-shaped sheet type, and is cut from a single piece of steel; The jaws include a left jaw and a right jaw, and the single body structure is a rectangular sheet type, which is rigidly connected to the left jaw arm and the right jaw arm respectively, and the jaw arm surface and the jaw tooth surface are perpendicular to each other, and the size and angle of the jaw teeth opening and closing are controlled by rotating the jaw arm; The pin shaft includes a rotating rod and a bolt. The rotating rod is a connecting structure between the left clamp arm and the right clamp arm. The rotating rod is arranged at the overlapping part of the turning point of the V-shaped structure of the left clamp arm and the right clamp arm. The two clamp arms realize the opening and closing operation with the rotating rod as the rotating axis. The bolt is tightened on the rotating rod as a fixing device of the rotating rod. The anti-falling rod comprises a left anti-falling rod and a right anti-falling rod, which are respectively welded to the outer side surfaces of the left clamp arm and the right clamp arm and are perpendicular to the surface of the clamp arm, and are used to locate the depth of the clamp teeth passing through the reserved hole of the component and prevent the hoisting device from falling into the component through the reserved hole of the component during hoisting; The hook holes include a left hook hole and a right hook hole, which are respectively arranged at the tail ends of the V-shaped structures of the left clamp arm and the right clamp arm. When the left clamp arm and the right clamp arm are closed, the left hook hole and the right hook hole overlap with each other, and then a hook or a sling is inserted to fix the opening and closing angles of the two clamp arms to achieve clamping and tightening of the component.
[0006] The method for lifting by using the above-mentioned lifting device suitable for lifting concrete products with holes is as follows: the left clamp arm and the right clamp arm rotate around the pin shaft to open the two hook holes to the left and right ends, thereby closing the left clamp teeth and the right clamp teeth, and then extend the clamp teeth in the closed state into the reserved hole of the component until the anti-falling rod reaches the outer surfaces on both sides of the reserved hole of the component; at this time, the left clamp arm and the right clamp arm rotate around the pin shaft in opposite directions to overlap the two hook holes, thereby expanding the left clamp teeth and the right clamp teeth outward, and the outer facades of the clamp teeth are close to the inner surfaces on both sides of the reserved hole of the component, so as to clamp and tighten the component; pass the hook or sling through the overlapping hook holes, fix the opening and closing angles of the clamp teeth, and lift the hook or sling with the help of lifting equipment to complete the lifting of the component.
[0007] Compared with the existing traditional slings, the sling provided by the present invention has the following advantages: 1) High safety: The hoisting device lifts the component by inserting the jaws into the reserved holes and clinging to the inner surface of the component. Compared with the traditional hoisting method of clamping the entire component at both ends for lifting, the contact area between the jaws and the component is increased, which can effectively reduce the shaking of the component during the hoisting process; on the other hand, since the hoisting device extends into the interior of the component, it can prevent the component from flipping, overturning or even falling off during the hoisting process, greatly improving the safety of the hoisting operation; 2) High efficiency: This hoist only needs one reserved hole to complete the hoisting of perforated concrete products. Compared with traditional hoists that require at least two clamping points, it can simplify the operation process and improve construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1It is a front view structural schematic diagram of a lifting device suitable for lifting a concrete product with a hole provided by the present invention; Figure 2 It is a side view structural diagram of the spreader; Figure 3 It is a schematic diagram of the overhead structure of the spreader; Figure 4 It is a schematic diagram of the front view structure of a concrete member with a hole; Figure 5 It is a top view structural diagram of the component; Figure 6 It is a side view structural diagram of the component; Figure 7 It is a schematic diagram of the front view structure of the hook and the fixing device; Figure 8 It is a schematic diagram of the side view structure of the hook and the fixing device; Fig. 9 It is a structural schematic diagram of the clamp teeth being in a closed state when the hanger is inserted into the reserved hole of the component; Fig.10 It is a schematic diagram of the structure when the sling clamps the component with its jaws open.
[0009] Numbers in the figure: 1. left clamp arm; 2. right clamp arm; 3. left clamp tooth; 4. right clamp tooth; 5. pin; 6. left anti-fall rod; 7. right anti-fall rod; 8. left hook hole; 9. right hook hole; 10. bolt; 11. rotating rod; 12. reserved hole for component; 13. fork arm mouth; 14. hook; 15. sling. DETAILED DESCRIPTION
[0010] The following is a further detailed description of a sling suitable for hoisting a concrete product with a hole according to the present invention in conjunction with the accompanying drawings and specific embodiments: Example 1
[0011] Combination Figures 1 to 3 As shown, the lifting device suitable for lifting the concrete product with holes comprises a clamp arm, clamp teeth, a pin shaft, an anti-falling rod and a hook hole; The clamp arm comprises a left clamp arm and a right clamp arm, and the single body structure is a V-shaped sheet type, and is cut from a single piece of steel; The jaws include a left jaw and a right jaw, and the single body structure is a rectangular sheet type, which is rigidly connected to the left jaw arm and the right jaw arm respectively, and the jaw arm surface and the jaw tooth surface are perpendicular to each other, and the size and angle of the jaw teeth opening and closing are controlled by rotating the jaw arm; The pin shaft includes a rotating rod and a bolt. The rotating rod is a connecting structure between the left clamp arm and the right clamp arm. The rotating rod is arranged at the overlapping part of the turning point of the V-shaped structure of the left clamp arm and the right clamp arm. The two clamp arms realize the opening and closing operation with the rotating rod as the rotating axis. The bolt is tightened on the rotating rod as a fixing device of the rotating rod. The anti-falling rod comprises a left anti-falling rod and a right anti-falling rod, which are respectively welded to the outer side surfaces of the left clamp arm and the right clamp arm and are perpendicular to the surface of the clamp arm, and are used to locate the depth of the clamp teeth passing through the reserved hole of the component and prevent the hoisting device from falling into the component through the reserved hole of the component during hoisting; The hook holes include a left hook hole and a right hook hole, which are respectively arranged at the tail ends of the V-shaped structures of the left clamp arm and the right clamp arm. When the left clamp arm and the right clamp arm are closed, the left hook hole and the right hook hole overlap with each other, and then a hook or a sling is inserted to fix the opening and closing angles of the two clamp arms to achieve clamping and tightening of the component.
[0012] The above-mentioned lifting equipment suitable for lifting perforated concrete products is used for loading, unloading and placing the guardrail of the central dividing strip of the expressway: Figures 4 to 6 As shown, the guardrail is a prefabricated concrete component produced in a factory. The component has a hollow structure and a reserved opening 12 for pouring internal concrete is provided on the top. First, rotate the left clamp arm and the right clamp arm around the pin shaft to open the two hook holes to the left and right ends, thereby closing the left clamp teeth and the right clamp teeth. Then extend the closed clamp teeth into the reserved hole of the component until the anti-fall rod reaches the outer surfaces on both sides of the reserved hole of the component. At this time, the left clamp arm and the right clamp arm rotate in opposite directions around the pin shaft to overlap the two hook holes, thereby expanding the left clamp teeth and the right clamp teeth outward, and the outer facades of the clamp teeth are pressed against the inner surfaces on both sides of the reserved hole of the component to achieve clamping and tightening of the component. Pass the sling through the overlapping hook holes to fix the opening and closing angles of the clamp teeth. Combined with Figures 7 and 8 As shown, the forklift arm is inserted into the fork arm opening 14 and connected with the hook 13 to be fixed, and then the hook 13 is connected to the lifting device, and the fork arm is lifted to realize the lifting of the component.
[0013] If the plane where the reserved holes of the concrete product are located is not a horizontal plane, the left and right hook holes cannot overlap after the clamp teeth are in close contact with the lower surface. At this time, a double chain hook or a sling can be used to hang into the hook holes respectively, and the component can be clamped and tightened by the deadweight of the component during the lifting process of the lifting equipment.
[0014] If the volume and self-weight of the concrete product are large, and the reserved hole is too small, the length of the clamp arm and the clamp teeth can be extended, and a hydraulic device can be added at the clamp arm position to achieve normal opening and closing of the spreader.
[0015] The examples of the present invention are described in detail above in conjunction with the embodiments, but the present invention is not limited to the above examples. Various changes can be made within the knowledge scope of ordinary technicians in the field without departing from the purpose of the present invention, and should also be regarded as the protection scope of the present invention.
Claims
1. A lifting device suitable for lifting concrete products with holes, characterized in that: The lifting device comprises a clamp arm, clamp teeth, a pin shaft, an anti-falling rod and a hook hole; The clamp arm comprises a left clamp arm and a right clamp arm, and the single body structure is a V-shaped sheet type, and is cut from a single piece of steel; The jaws include a left jaw and a right jaw, and the single body structure is a rectangular sheet type, which is rigidly connected to the left jaw arm and the right jaw arm respectively, and the jaw arm surface and the jaw tooth surface are perpendicular to each other, and the size and angle of the jaw teeth opening and closing are controlled by rotating the jaw arm; The pin shaft includes a rotating rod and a bolt. The rotating rod is a connecting structure between the left clamp arm and the right clamp arm. The rotating rod is arranged at the overlapping part of the turning point of the V-shaped structure of the left clamp arm and the right clamp arm. The two clamp arms realize the opening and closing operation with the rotating rod as the rotating axis. The bolt is tightened on the rotating rod as a fixing device of the rotating rod. The anti-falling rod comprises a left anti-falling rod and a right anti-falling rod, which are respectively welded to the outer side surfaces of the left clamp arm and the right clamp arm and are perpendicular to the surface of the clamp arm, and are used to locate the depth of the clamp teeth passing through the reserved hole of the component and prevent the hoisting device from falling into the component through the reserved hole of the component during hoisting; The hook holes include a left hook hole and a right hook hole, which are respectively arranged at the tail ends of the V-shaped structures of the left clamp arm and the right clamp arm. When the left clamp arm and the right clamp arm are closed, the left hook hole and the right hook hole overlap with each other, and then a hook or a sling is inserted to fix the opening and closing angles of the two clamp arms to achieve clamping and tightening of the component.
2. The method for hoisting a hoisting device for hoisting a concrete product with a hole according to claim 1, characterized in that: The specific operation of the lifting method is as follows: the left clamp arm and the right clamp arm rotate around the pin shaft to make the two hook holes open to the left and right ends, thereby closing the left clamp teeth and the right clamp teeth, and then extend the clamp teeth in the closed state into the reserved hole of the component until the anti-falling rod reaches the outer surfaces on both sides of the reserved hole of the component; at this time, the left clamp arm and the right clamp arm rotate in opposite directions around the pin shaft to make the two hook holes overlap, thereby making the left clamp teeth and the right clamp teeth expand outward, and the outer facades of the clamp teeth are close to the inner surfaces on both sides of the reserved hole of the component to achieve clamping and tightening of the component; pass the hook or sling through the overlapping hook holes, fix the opening and closing angles of the clamp teeth, and lift the hook or sling with the help of lifting equipment to complete the lifting of the component.