A large-span arc-shaped beam hoisting hoist and a design method thereof

Abstract

This invention discloses a lifting device and its design method for hoisting a large-span curved beam, comprising a lifting device body; two first lifting rings are arranged on the lower surface of the lifting device body; the distance between the two first lifting rings is equal to the distance between the lifting rings on the curved beam at both ends of the large-span curved eccentric beam; the lifting device body is connected to the curved eccentric beam via connecting shackles; two second lifting rings are arranged on the upper surface of the lifting device body; the distance between the two second lifting rings is twice the maximum horizontal distance from the center of gravity of the curved eccentric beam to the lifting lug. The invention uses a lifting ring spacing of 2B on the upper surface of the lifting device, which is twice the maximum horizontal distance B between the lifting ring and the center of gravity, ensuring the horizontal balance of the curved eccentric beam during hoisting. Compared to using the length of the lifting rope to match and adjust the horizontal balance of the hoisting, this invention makes it easier to ensure the horizontal balance of the curved eccentric beam during hoisting.

Description

Technical Field

[0001] This invention relates to the field of bridge installation technology, and in particular to a hoisting tool for large-span curved beams and its design method. Background Technology

[0002] In municipal bridge engineering, the use of large-span curved beams is common in the design of overpass bridges. The hoisting of large-span curved beams presents certain technical challenges compared to the hoisting of components with conventional regular shapes.

[0003] 1) The center of gravity of the curved beam component is eccentric relative to its own external dimensions. Symmetrical lifting points are arranged on the component body to meet the lifting technical requirements and reasonable lifting points. Components with large eccentric dimensions cannot be implemented and lifting beams or lifting tools need to be designed to solve the lifting work.

[0004] 2) For conventional curved beams with relatively small external dimensions, a single lifting device is generally used, with three lifting points set on the curved beam to ensure lifting balance.

[0005] 3) If a large-span curved beam is hoisted using a single lifting device with three lifting points, it requires a longer lifting arm and a larger working space, which is not feasible in municipal engineering projects due to the limitations of external environment in hoisting technology.

[0006] To enable the hoisting of large-span curved beams using two lifting devices, this invention proposes the design of a lifting beam or lifting device. This addresses the issue of eccentric center of gravity in large-span curved beams by connecting the lifting device to the lifting lugs at both ends of the component body, thereby achieving balanced hoisting of the eccentric curved beam and completing the hoisting work. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a lifting device and its design method for lifting large-span curved beams. Compared to using the length of the lifting rope to match and adjust the horizontal balance of the beam, using the lifting device makes it easier to ensure the horizontal balance of large-span curved eccentric beams.

[0008] This invention is achieved through the following technical solution:

[0009] A lifting device for a large-span curved beam includes a lifting device body; two first lifting rings are arranged on the lower surface of the lifting device body; the distance between the two first lifting rings is equal to the distance between the lifting rings on the curved beam at both ends of the large-span curved eccentric beam; the lifting device body is connected to the curved eccentric beam via a connecting shackle; two second lifting rings are arranged on the upper surface of the lifting device body; the distance between the two second lifting rings is twice the maximum horizontal distance from the center of gravity of the curved eccentric beam to the lifting lug.

[0010] As a further improvement to the technical solution of this invention, a design method for a hoisting device for a large-span curved beam includes the following steps:

[0011] Step S1: Accurately calculate the position of the center of gravity of the curved eccentric beam according to the design drawings;

[0012] Step S2: Determine a set of cross reference lines on the arc-shaped eccentric beam, then arrange arc-shaped beam lifting rings at both ends of the upper surface of the arc-shaped eccentric beam, and determine the horizontal distance dimensions of the arc-shaped beam lifting rings from the center of gravity as B and C respectively;

[0013] Step S3: Arrange a set of first lifting rings on the lower surface of the lifting device body. The spacing between the first lifting rings is (B+C), and ensure that (B+C)>B, that is, ensure that the center of gravity is between the two first lifting rings.

[0014] Step S4: Arrange a set of second lifting rings on the upper surface of the lifting device body. The spacing between the second lifting rings is 2B.

[0015] Step S5: The lifting device body and the arc-shaped eccentric beam are connected by a connecting shackle;

[0016] Step S6: During hoisting, the resultant force of the hoisting ropes on the hoisting equipment body passes through the center of gravity of the arc-shaped eccentric beam to ensure the balance of the eccentric steel beam in the left and right horizontal directions.

[0017] As a further improvement to the technical solution of the present invention, the first lifting ring and the arc-shaped beam lifting ring are perpendicular to each other in terms of their arrangement angle.

[0018] As a further improvement to the technical solution of the present invention, the connecting shackle includes a pin, an arc-shaped ring, and a nut; the pin passes through the first lifting ring and is locked and fixed by the nut, the pin passes through the arc-shaped beam lifting ring and is locked and fixed by the nut; the arc-shaped ring on the lifting body and the arc-shaped ring on the arc-shaped eccentric beam are interlocked and connected, the axes of the two arc-shaped rings are at a 90-degree angle to each other, and the two shackles transmit force through mutual contact and compression.

[0019] The present invention has the following beneficial effects:

[0020] 1. This invention is particularly suitable when it is impossible to arrange symmetrical lugs about the center of gravity on the body of the arc-shaped eccentric beam, and when the eccentricity is large.

[0021] 2. The spacing between the lifting rings arranged on the upper surface of the lifting device is 2B, which is twice the maximum horizontal distance B between the lifting ring and the center of gravity. This ensures the horizontal balance of the curved eccentric beam during hoisting. Compared with using the length of the lifting rope to match and adjust the horizontal balance of the hoisting, the horizontal balance of the curved eccentric beam is more easily guaranteed by using the lifting device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure for accurately calculating the center of gravity position of the arc-shaped eccentric beam according to the present invention;

[0023] Figure 2 The present invention provides a schematic diagram showing how a set of cross reference lines are determined on an arc-shaped eccentric beam, and then two sets of lifting rings are arranged on the upper surface of each end of the beam, with the horizontal distance dimensions B and C between the lifting rings and the center of gravity determined respectively.

[0024] Figure 3 This is a schematic diagram of the structure of the connecting shackle according to an embodiment of the present invention;

[0025] Figure 4 for Figure 2 A magnified diagram of the connection form of the connecting shackle in part A.

[0026] In the attached diagram: 1-Lifting device body; 2-First lifting ring; 3-Arc-shaped eccentric beam; 4-Arc-shaped beam lifting ring; 5-Connecting shackle; 6-Second lifting ring; 51-Pin; 52-Arch-shaped ring; 53-Nut. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] In this invention, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this invention.

[0031] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below.

[0032] This invention relates to a lifting device for a large-span curved beam, comprising a lifting device body 1; two first lifting rings 2 are arranged on the lower surface of the lifting device body 1; the distance between the two first lifting rings 2 is equal to the distance between the curved beam lifting rings 4 at both ends of the large-span curved eccentric beam 3; the lifting device body 1 is connected to the curved eccentric beam 3 via connecting shackles 5; two second lifting rings 6 are arranged on the upper surface of the lifting device body 1; the distance between the two second lifting rings 6 is twice the maximum horizontal distance between the center of gravity of the curved eccentric beam 3 and the lifting lugs. It should be noted that this invention is particularly suitable when it is impossible to arrange lifting lugs symmetrically about the center of gravity on the curved eccentric beam 3 body, and when the eccentricity is large.

[0033] Specifically, in this embodiment, a design method for a lifting device for a large-span curved beam includes the following steps:

[0034] Step S1: According to the design drawings, accurately calculate the position of the center of gravity of the curved eccentric beam 3; such as Figure 1 As shown.

[0035] Step S2: Determine a set of cross reference lines on the arc-shaped eccentric beam 3, then arrange arc-shaped beam lifting rings 4 at both ends of the upper surface of the arc-shaped eccentric beam 3, and determine the horizontal distances B and C between the arc-shaped beam lifting rings 4 and the center of gravity, respectively; Figure 2 As shown.

[0036] Step S3: Arrange a set of first lifting rings 2 on the lower surface of the lifting device body 1. The spacing between the first lifting rings 2 is (B+C), and ensure that (B+C)>B, that is, ensure that the center of gravity is between the two first lifting rings 2.

[0037] Step S4: Arrange a set of second lifting rings 6 on the upper surface of the lifting device body 1. The spacing between the second lifting rings 6 is 2B; Figure 2 As shown.

[0038] Step S5: The lifting device body 1 and the arc-shaped eccentric beam 3 are connected by the connecting shackle 5;

[0039] Step S6: During hoisting, the resultant force of the hoisting ropes on the hoisting device body 1 passes through the center of gravity of the arc-shaped eccentric beam 3, ensuring the balance of the eccentric steel beam in the left and right horizontal directions.

[0040] It should be noted that the spacing between the lifting rings arranged on the upper surface of the lifting device in this invention is 2B, which is twice the maximum horizontal distance B between the lifting ring and the center of gravity. This ensures the horizontal balance of the arc-shaped eccentric beam 3 during lifting. Compared with using the length of the lifting rope to match and adjust the horizontal balance of the lifting, the horizontal balance of the arc-shaped eccentric beam 3 is more easily guaranteed by using the lifting device.

[0041] Specifically, in this embodiment, the first lifting ring 2 and the arc-shaped beam lifting ring 4 are perpendicular to each other in terms of their arrangement angle.

[0042] Specifically, in this embodiment, the connecting shackle 5 includes a pin 51, an arc-shaped ring 52, and a nut 53; the pin 51 passes through the first lifting ring 2 and is locked and fixed by the nut 53, and the pin 51 passes through the arc-shaped beam lifting ring 4 and is locked and fixed by the nut 53; the arc-shaped ring 52 on the lifting body 1 and the arc-shaped ring 52 on the arc-shaped eccentric beam 3 are interlocked, with the axes of the two arc-shaped rings 52 forming a 90-degree angle, and the two shackles transmit force through mutual contact and compression. It should be noted that the shackle style uses a standard shackle that can be purchased on the market, and does not need to be specially manufactured, such as... Figure 3 The diagram shows the details of the shackle connection. Figure 4 As shown.

[0043] Compared with existing technologies, the present invention has the following advantages:

[0044] 1. This invention is particularly suitable when it is impossible to arrange symmetrical lugs about the center of gravity on the body of the arc-shaped eccentric beam, and when the eccentricity is large.

[0045] 2. The spacing between the lifting rings arranged on the upper surface of the lifting device is 2B, which is twice the maximum horizontal distance B between the lifting ring and the center of gravity. This ensures the horizontal balance of the curved eccentric beam during hoisting. Compared with using the length of the lifting rope to match and adjust the horizontal balance of the hoisting, the horizontal balance of the curved eccentric beam is more easily guaranteed by using the lifting device.

[0046] The present invention provides a lifting device and its design method for lifting large-span curved beams. Compared with using the length of the lifting rope to match and adjust the balance in the left and right horizontal directions of the lifting, the use of the lifting device makes it easier to ensure the balance in the left and right horizontal directions of large-span curved eccentric beams.

[0047] The technical solutions provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of the present invention. The descriptions of the embodiments above are only for helping to understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A design method for a lifting device for a large-span curved beam, comprising a lifting device body; two first lifting rings arranged on the lower surface of the lifting device body; the distance between the two first lifting rings being equal to the distance between the lifting rings on both ends of the curved eccentric beam; the lifting device body being connected to the curved eccentric beam via connecting shackles; two second lifting rings arranged on the upper surface of the lifting device body; the distance between the two second lifting rings being twice the maximum horizontal distance from the center of gravity of the curved eccentric beam to the lifting lug; characterized in that, Includes the following steps: Step S1: Accurately calculate the position of the center of gravity of the curved eccentric beam according to the design drawings; Step S2: Determine a set of cross reference lines on the arc-shaped eccentric beam, then arrange arc-shaped beam lifting rings at both ends of the upper surface of the arc-shaped eccentric beam, and determine the horizontal distance dimensions of the arc-shaped beam lifting rings from the center of gravity as B and C respectively; Step S3: Arrange a set of first lifting rings on the lower surface of the lifting device body. The spacing between the first lifting rings is (B+C), and ensure that (B+C)>B, that is, ensure that the center of gravity is between the two first lifting rings. Step S4: Arrange a set of second lifting rings on the upper surface of the lifting device body. The spacing between the second lifting rings is 2B. Step S5: The lifting device body and the arc-shaped eccentric beam are connected by a connecting shackle; Step S6: During hoisting, the resultant force of the hoisting ropes on the hoisting equipment body passes through the center of gravity of the arc-shaped eccentric beam to ensure the horizontal balance of the arc-shaped eccentric beam.

2. The design method of a hoisting tool for a large-span curved beam according to claim 1, characterized in that: The first lifting ring and the arc-shaped beam lifting ring are perpendicular to each other in terms of their arrangement angle.

3. The design method of a hoisting tool for a large-span curved beam according to claim 1, characterized in that: The connecting shackle includes a pin, an arc-shaped ring, and a nut; the pin passes through the first lifting ring and is locked and fixed by the nut, and the pin passes through the arc-shaped beam lifting ring and is locked and fixed by the nut; the arc-shaped ring on the lifting body and the arc-shaped ring on the arc-shaped eccentric beam are interlocked and connected, the axes of the two arc-shaped rings are at a 90-degree angle to each other, and the force is transmitted between the two shackles through mutual contact and compression.

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