Method for assembling a fabricated spreader beam

Abstract

The application discloses an assembly method of a fabricated sling crossbeam, which comprises the following steps: dispersively arranging a plurality of isolation bushings between adjacent bearing plates which are arranged in parallel and spaced from each other, and connecting the isolation bushings and the bearing plates through fasteners to form a crossbeam body; manufacturing a panel limiting frame and sleeving the limiting frame on both ends of the crossbeam body to frame the end face and / or the peripheral wall of the crossbeam body. According to the sling crossbeam, a plurality of bearing plates are arranged in parallel, adjacent bearing plates are separated by isolation bushings, the use is safe and reliable, the sling crossbeam is suitable for large-tonnage hoisting equipment, the problem of lateral tilting deformation of the fabricated sling crossbeam can be solved successfully, damaged parts can be quickly replaced, the sling crossbeam is convenient for disassembly, assembly and storage of parts.

Description

Technical Field

[0001] This application belongs to the field of engineering machinery, and specifically relates to a method for assembling a prefabricated lifting beam. Background Technology

[0002] During the heavy load test of the prefabricated spreader beam with a capacity of 1,000 tons, the prefabricated spreader beam is suspended in the air at a height of 20 to 32 meters above the ground. Due to the effect of lateral wind force, the spreader will have a lateral swing motion, and the weight frame suspended below will also have a double swing motion. The resulting inertia will seriously affect the load test. At the same time, the middle plate and middle side plate inside the spreader will have tilting deformation.

[0003] like Figure 1 As shown, existing technology typically uses pins to connect multiple load-bearing plates into a crossbeam body 100, and then welds them together through multiple welds 300 to ensure the stability of each load-bearing plate and prevent lateral tilting. However, under heavy load, the prefabricated combined lifting beam is suspended high in the air and subjected to lateral wind forces. The weight frame suspended below undergoes a double-pendulum motion, and the connecting slings are subjected to oblique tension, which can cause the welds 300 between the pins and the load-bearing plates to crack. Moreover, once multiple load-bearing plates are welded together with pins, if any component is damaged, replacement is difficult and not easy to operate. Summary of the Invention

[0004] The purpose of this application is to provide a method for assembling a prefabricated spreader beam to solve the problem of lateral tilting deformation of the prefabricated spreader beam.

[0005] To achieve the above objectives, this application provides a method for assembling a prefabricated lifting beam, comprising:

[0006] Multiple isolation bushings are dispersed between adjacent load-bearing plates that are spaced apart and parallel to each other, and the isolation bushings and the load-bearing plates are connected by fasteners to form a crossbeam body;

[0007] A panel limiting frame is fabricated and fitted onto both ends of the crossbeam body to tightly frame the end faces and / or peripheral walls of the crossbeam body.

[0008] In the manner described in this application, the step of distributing multiple isolation bushings between adjacent parallel bearing plates spaced apart from each other, and connecting the isolation bushings and the bearing plates with fasteners to form the beam body includes:

[0009] The middle plate of the beam body is suspended, and multiple pre-set through holes are distributed on the middle plate along the thickness direction.

[0010] Prepare multiple fasteners of various specifications and pass them through the multiple pre-set through holes one by one;

[0011] Each of the fasteners is fitted with a first isolation bushing positioned on both sides of the middle plate;

[0012] Side plates are installed on both sides of the middle plate, parallel to and spaced apart from the middle plate. The middle plate and the side plates are locked together along the thickness direction by some of the fasteners, so that the first isolation bushing is pressed between the adjacent surfaces of the middle plate and the side plates.

[0013] In the manner described in this application, the step of distributing multiple isolation bushings between adjacent parallel bearing plates spaced apart from each other, and connecting the isolation bushings and the bearing plates with fasteners to form the beam body, further includes:

[0014] A second isolation bushing located on the outside of the middle side plate is fitted at both ends of each of the fasteners passing through the middle side plate;

[0015] A panel is installed on the outside of the middle side plate, parallel to and spaced from the middle side plate, and the panel, the middle side plate, and the middle plate are locked together along the plate thickness direction by the fasteners, so that the second isolation bushing is pressed between the adjacent plate surfaces of the middle side plate and the panel.

[0016] In the manner described in this application, each of the second isolation bushings has the same thickness, each of the first isolation bushings has the same thickness, and the thickness of the second isolation bushing is less than the thickness of the first isolation bushing.

[0017] In the manner described in this application, the fastener includes a load-bearing pin for connecting the end of a load-bearing weight rack, a long screw, and a short screw. The diameter of the load-bearing pin is larger than the diameter of the long screw or the short screw. The lengths of the load-bearing pin and the long screw are set to be able to penetrate the crossbeam body as a whole along the plate thickness direction. The short screw is used to pass through and lock the middle plate and the middle side plates on both sides along the plate thickness direction.

[0018] In the manner described in this application, the first isolation bushing includes a first pin bushing sleeved on the load-bearing pin and a first screw bushing sleeved on the long screw or the short screw; the second isolation bushing includes a second pin bushing sleeved on the load-bearing pin and a second screw bushing sleeved on the long screw or the short screw.

[0019] In the method described in this application, the ends of the fasteners are locked using a double-nut fixing method, and the nut ends are pressed against the outer surface of the bearing plate by a washer.

[0020] In the manner described in this application, the surface spacing between the middle plate and the middle side plate, which are arranged in parallel intervals, is L1, and the surface spacing between the middle side plate and the panel, which are arranged in parallel intervals, is L2, and L1 and L2 satisfy the golden ratio relationship.

[0021] In the manner described in this application, the step of fabricating the panel limiting frame and fitting it onto both ends of the crossbeam body to frame the end faces and / or peripheral walls of the crossbeam body includes:

[0022] A rectangular box frame with one open end is made as the panel limiting frame;

[0023] The open ends of the panel limiting frame are fitted onto both ends of the crossbeam body and fixed by the fasteners.

[0024] In the manner described in this application, the peripheral wall of the panel limiting frame is provided with a frame wall through hole, and the fastener located at the end of the crossbeam body passes through the frame wall through hole and is locked to the outer peripheral wall of the panel limiting frame.

[0025] The prefabricated spreader beam and its assembly method described in this application aim to prevent lateral tilting deformation of the prefabricated spreader beam during operation. Multiple load-bearing plates are arranged in parallel, separated by isolation bushings, and connected in series using fasteners such as pins. The ends of the pins are tightened with washers and nuts to form a unified connection. This method of isolating adjacent load-bearing plates with bushings effectively controls the tilting of each load-bearing plate. Furthermore, panel limiting frames are added at both ends of the beam body to further limit and stabilize the ends of the load-bearing plates, preventing lateral tilting deformation. The prefabricated combined spreader beam of this application can bear high loads, covering overload conditions testing of the entire series of thousand-ton crawler cranes.

[0026] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings:

[0028] Figure 1 This is a structural schematic diagram of a lifting beam in the prior art;

[0029] Figures 2a to 2c This is a schematic diagram illustrating the assembly process of the assembly method for the prefabricated lifting beam according to a specific embodiment of this application.

[0030] Figure 2dThis is a schematic diagram illustrating the assembly steps of a prefabricated lifting beam according to a specific embodiment of this application;

[0031] Figure 3 , Figure 4 These are, respectively, the front view and the top view of the beam body of the lifting beam according to a specific embodiment of this application;

[0032] Figure 5 for Figure 3 A cross-sectional view along plane AA;

[0033] Figure 6 for Figure 3 A cross-sectional view along the BB plane;

[0034] Figure 7 for Figure 3 A cross-sectional view along the CC plane;

[0035] Figure 8 A front view of the lifting beam according to a specific embodiment of this application; and

[0036] Figure 9 The diagram illustrates the spacing relationship between the various load-bearing plates in the beam body.

[0037] Explanation of reference numerals in the attached figures

[0038] 1. Load-bearing pin 2. Large nut

[0039] 3. Large gasket; 4. Second pin bushing

[0040] 5 First pin bushing 6 Middle plate

[0041] 7 small nuts 8 small washers

[0042] 9 Long screw 10 Second screw bushing

[0043] 11 First screw bushing 12 Middle side plate

[0044] 13 Panel 14 Short Screw

[0045] 100 Crossbeam body 200 Panel limiting frame

[0046] 300 weld Detailed Implementation

[0047] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0048] The following description, with reference to the accompanying drawings, describes the prefabricated lifting beam according to this application and its assembly method.

[0049] To prevent tilting deformation of the middle plate and side plates inside the lifting device during lifting tests, this application proposes a targeted control strategy or process, namely, an assembly method for the crossbeam of a prefabricated lifting device. In one specific embodiment, see... Figure 2d The assembly method according to this application may include:

[0050] Step S100: Multiple isolation bushings are dispersed between adjacent bearing plates that are spaced apart and parallel to each other, and the isolation bushings and bearing plates are connected by fasteners to form the crossbeam body 100.

[0051] Step S200: Make a panel limiting frame 200 and fit it on both ends of the beam body 100 to frame the end face and / or peripheral wall of the beam body 100.

[0052] As can be seen, the prefabricated lifting beam and its assembly method of this application are a process method to prevent lateral tilting deformation of the prefabricated lifting beam. It uses bushings to isolate adjacent bearing plates to control the tilting of each bearing plate. Simultaneously, panel limiting frames 200 are added to both ends of the beam body 100 to stabilize the ends of the bearing plates, further preventing lateral tilting deformation. Figure 8 As shown.

[0053] like Figure 3 , Figure 4 As shown, multiple load-bearing plates are arranged in parallel, separated by isolation bushings, and connected in series using fasteners such as pins. The ends of the pins are tightened with washers and nuts to form a complete connection. CAE finite element analysis shows that this assembled combined lifting beam can bear loads up to 4000 tons, covering overload conditions for almost the entire range of thousand-ton crawler cranes.

[0054] To assemble and form the crossbeam body 100, step S100 may further include:

[0055] The middle plate 6 of the crossbeam body 100 is suspended, and multiple pre-set through holes are distributed on the middle plate 6 along the thickness direction.

[0056] Prepare multiple fasteners of various specifications and pass them through multiple pre-set through holes one by one;

[0057] Each fastener is fitted with a first isolation bushing positioned on both sides of the middle plate 6;

[0058] Side plates 12, parallel and spaced apart from the middle plate 6, are installed on both sides of the middle plate 6. The middle plate 6 and the side plates 12 on both sides are locked along the thickness direction by some fasteners, so that the first isolation bushing is pressed between the adjacent plate surfaces of the middle plate 6 and the side plates 12.

[0059] Specifically, see Figure 2a , Figure 2b To assemble the lifting beam, the middle plate 6 is first suspended, and then multiple fasteners are threaded through the surface of the middle plate 6. The pre-set through holes on the surface of the middle plate 6 are as follows: Figure 3 As shown, the fasteners are distributed along the length and width of the plate to ensure better stress balance at the connection points. The pre-set through holes and their corresponding fasteners come in different specifications for different purposes. Different types of fasteners are threaded through the corresponding pre-set through holes.

[0060] After connecting all the fasteners, a first isolation bushing is fitted at both ends of each fastener, positioned on both sides of the middle plate 6, and then... Figure 2b As shown, side plates 12 are installed on both sides of the middle plate 6, parallel to and spaced apart from the middle plate 6. To fix the relatively parallel positional relationship between the middle plate 6 and the side plates 12, the middle plate 6 and the two side plates 12 are partially locked along the plate thickness direction using fasteners. Simultaneously, the first isolation bushings on both sides are subjected to locking pressure along the plate thickness direction, causing the two ends of the bushings to press against the adjacent plate surfaces, thereby ensuring a stable and spaced distance between the middle plate 6 and the side plates 12.

[0061] In addition, step S100 further includes:

[0062] A second isolation bushing located on the outside of the middle side plate 12 is fitted at both ends of each fastener passing through the middle side plate 12;

[0063] A panel 13 is installed on the outside of the middle side plate 12, parallel and spaced apart from the middle side plate 12. The panel 13, the middle side plate 12 and the middle plate 6 are locked together along the thickness direction by fasteners, so that the second isolation bushing is pressed between the adjacent surfaces of the middle side plate 12 and the panel 13.

[0064] See Figure 2c ,exist Figure 2b Based on the structure, a second isolation bushing is provided at both ends of each fastener passing through the middle side plate 12, and a parallel and spaced panel 13 is further provided on the outside of the middle side plate 12. Finally, the panel 13, the middle side plate 12 and the middle plate 6 are locked from the outside to the inside by fasteners along the plate thickness direction, and the first and second isolation bushings are also pressed along the plate thickness direction of the crossbeam body 100 (i.e. the fastener connection direction).

[0065] To maintain consistency in the spacing between the various bearing plates, the thickness of each second isolation bushing is the same, and the thickness of each first isolation bushing is also the same. In particular, in this embodiment, the thickness of the second isolation bushing is less than that of the first isolation bushing to obtain better structural stability, which will be described in detail below.

[0066] In this embodiment, there are five support plates and three specifications of fasteners, but this application is not limited to these. Figures 3 to 7 As shown, the fasteners in this embodiment include a load-bearing pin 1 for connecting the end to the load-bearing weight rack, and three specifications: a long screw 9 and a short screw 14. The diameter of the load-bearing pin 1 is larger than the diameter of the long screw 9 or the short screw 14. The lengths of the load-bearing pin 1 and the long screw 9 are set to be able to penetrate the crossbeam body 100 along the plate thickness direction to connect the five load-bearing plates. The short screw 14 is used to connect and lock the middle plate 6 and the middle side plates 12 on both sides along the plate thickness direction.

[0067] Figure 5 Half-sectional views of the long screw 9 and the short screw 14 are shown. Figure 6 A half-sectional view of the load-bearing pin 1 is shown. It can be seen that the load-bearing pin 1, as a load-bearing component, has a large diameter and a long length. The long screw 9 is mainly used to connect the various bearing plates; it is long but has a small diameter. The short screw 14 is only used to connect the middle side plate 12 and the middle plate 6, and therefore has a shorter length.

[0068] Accordingly, such as Figures 4 to 6 As shown, the first isolation bushing includes a first pin bushing 5 sleeved on the load-bearing pin 1 and a first screw bushing 11 sleeved on the long screw 9 or the short screw 14; the second isolation bushing includes a second pin bushing 4 sleeved on the load-bearing pin 1 and a second screw bushing 10 sleeved on the long screw 9 or the short screw 14.

[0069] In particular, such as Figures 4 to 7 As shown, a double-nut fixing method is used to lock the ends of each fastener, and the nut ends are pressed against the outer surface of the bearing plate by washers to achieve the purpose of fastening and preventing loosening. Among them, the end fastening structure of the load-bearing pin 1 includes two large nuts 2 and a large washer 3, and the end fastening structures of the long screw 9 and the short screw 14 each include two small nuts 7 and small washers 8.

[0070] Regarding the design of panel spacing, in this embodiment, see [reference needed]. Figure 9 The distance between the parallel-spaced middle plate 6 and the middle side plate 12 in the beam body 100 is L1, and the distance between the parallel-spaced middle side plate 12 and the panel 13 is L2. L1 and L2 satisfy the golden ratio, approximately L1:L2 = 1.618:1. Thus, as... Figure 9 The use of the "golden ratio" and "symmetrical distribution" methods for overall distribution enhances the aesthetic appeal of the structural design. More importantly, CAE finite element analysis and multiple load tests demonstrate that it provides better stability in preventing structural deformation under stress.

[0071] Specifically, step S200 may further include:

[0072] Create a rectangular box frame with one end open as the panel constraint frame 200;

[0073] The open end of the panel limiting frame 200 is fitted onto both ends of the crossbeam body 100 and fixed by fasteners.

[0074] like Figure 8 As shown, in this embodiment, the panel limiting frame 200 is a rectangular frame to adapt to the end shape of the beam body 100. The panel limiting frame 200 is fitted onto the end of the beam body 100 and can then be connected and locked together by fasteners. Specifically, the peripheral wall of the panel limiting frame 200 may be provided with a frame wall through hole, through which the fasteners located at the end of the beam body 100 pass and are locked to the outer peripheral wall of the panel limiting frame 200. See also Figure 7 The fasteners connecting the crossbeam body 100 and the panel limiting frame 200 may include a load-bearing pin 1 and a long screw 9.

[0075] Thus, by limiting the length, width and height of the end of the beam body 100 in three directions and enhancing the connection through the panel limiting frame 200, the lifting beam can become a more integrated whole device, thereby effectively solving the problem of lateral tilting deformation of the assembled lifting beam.

[0076] In summary, the assembly method of the prefabricated lifting beam of this application can effectively prevent the load-bearing plate from tilting and deforming. In the specific assembly operation, the middle plate 6 can be suspended first, and the load-bearing pin 1 can be inserted. Then, the load-bearing pin 1, the long screw 9, and the short screw 14 can be installed. Then, the first pin bushing 5 can be inserted into the load-bearing pin 1, the first screw bushing 11 can be inserted into the long screw 9, and the first screw bushing 11 can be inserted into the short screw 14 to complete the bushing connection. Then, the middle side plate 12 can be inserted into the load-bearing pin 1, the long screw 9, and the short screw 14 to complete the insertion. The short screw 14 can be locked with the small nut 7 and the small washer 8 to complete the basic assembly.

[0077] Then, the second pin bushing 4 and the second screw bushing 10 can be inserted into the load-bearing pin 1 and the long screw 9 respectively. Next, the panel 13 can be inserted into the load-bearing pin 1 and the long screw 9. After insertion, the load-bearing pin 1 is locked using the large nut 2 and the large washer 3, and the long screw 9 is locked using the small nut 7 and the small washer 8. In all cases, a double-nut fixing method is used to prevent the panel from loosening.

[0078] Finally, the panel limiting frames 200 at the left and right ends are fitted onto both ends of the crossbeam body 100, and the center holes are aligned. The load-bearing pin 1 and the long screw 9 are then inserted into them respectively. The load-bearing pin 1 is locked with the large nut 2 and the large washer 3, and the long screw 9 is locked with the small nut 7 and the small washer 8. This completes the assembly of the lifting beam.

[0079] During lifting, the lifting device is first connected to the crane boom via a wire rope. Then, the transition connector for lifting is installed on the load-bearing pin 1, and the transition connector is then connected to the counterweight. To more clearly demonstrate that the lifting device beam assembled in this application can withstand a lifting test of thousands of tons, loads G ranging from 2000t to 5400t were applied to the lifting device beam using finite element software and analyzed. The material of the load-bearing plate was selected as HG785, and the data are shown in Table 1 below:

[0080]

[0081] It can be seen from the above table:

[0082] (1) Under the condition of a load of 2000t, the maximum calculated stress of the lifting beam is 314.6MPa, which is less than the allowable stress of 467MPa (safety factor n = 1.34) and the maximum calculated displacement is 12.1mm. Therefore, the strength of the lifting beam meets the requirements under the condition of a load of 2000t.

[0083] (2) Under the condition of a load of 2500t, the maximum calculated stress of the lifting beam is 392.2MPa, which is less than the allowable stress of 513MPa (safety factor n = 1.22) and the maximum calculated displacement is 12.2mm. Therefore, the strength of the lifting beam meets the requirements under the condition of a load of 2500t.

[0084] (3) Under the condition of a load of 4500t, the maximum calculated stress of the lifting beam is 428.2MPa, which is less than the allowable stress of 513.5MPa (safety factor n = 1.34) and the maximum calculated displacement is 12.7mm. Therefore, the strength of the lifting beam meets the requirements under the condition of a load of 4500t.

[0085] (4) Under the condition of a load of 4950t, the maximum stress of the lifting beam is calculated to be 476.2MPa through finite element analysis, which is less than the allowable stress of 513.5MPa (safety factor n = 1.22), and the maximum displacement is calculated to be 14mm. Therefore, the strength of the lifting beam meets the requirements under the condition of a load of 4950t.

[0086] (5) Under the condition of a load of 5400t, the maximum calculated stress of the lifting beam is 503.3MPa, which is less than the allowable stress of 513.5MPa (safety factor n = 1.22) and the maximum calculated displacement is 19.2mm. Therefore, the strength of the lifting beam meets the requirements under the condition of a load of 5400t.

[0087] For the calculation of allowable stress, please refer to page 35 of GB / T3811-2008 Crane Design Code.

[0088] As can be seen from the above, the lifting beam provided in this embodiment is safe and reliable in use and is suitable for lifting heavy-duty lifting equipment. The assembly method of the prefabricated lifting beam of this application can successfully solve the problem of lateral deformation of the prefabricated lifting beam, and also allows for quick replacement of damaged parts, facilitating disassembly and assembly of objects, and making parts easier to store.

[0089] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0090] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0092] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for assembling a prefabricated lifting beam, characterized in that, The assembly method includes: Multiple isolation bushings are distributed between adjacent bearing plates that are spaced apart and parallel to each other, and the isolation bushings and the bearing plates are connected by fasteners to form a crossbeam body (100). A panel limiting frame (200) is made and fitted onto both ends of the beam body (100) to frame the end face and / or peripheral wall of the beam body (100). The step of distributing multiple isolation bushings between adjacent bearing plates that are spaced apart and parallel to each other, and connecting the isolation bushings and the bearing plates with fasteners to form the beam body (100) includes: The middle plate (6) of the beam body (100) is suspended, and multiple pre-set through holes are dispersed on the middle plate (6) along the thickness direction. Prepare multiple fasteners of various specifications and pass them through the multiple pre-set through holes one by one; Each of the fasteners is fitted with a first isolation bushing arranged on both sides of the middle plate (6); Middle side plates (12) are installed on both sides of the middle plate (6) and are parallel to and spaced apart from the middle plate (6). The middle plate (6) and the middle side plates (12) on both sides are locked along the thickness direction by some of the fasteners, so that the first isolation bushing is pressed between the adjacent plate surfaces of the middle plate (6) and the middle side plates (12). The step of distributing multiple isolation bushings between adjacent parallel support plates and connecting the isolation bushings and the support plates with fasteners to form the beam body (100) further includes: A second isolation bushing located on the outside of the middle side plate (12) is fitted at both ends of each of the fasteners passing through the middle side plate (12); A panel (13) is installed on the outside of the middle side plate (12) and spaced parallel to the middle side plate (12). The panel (13), the middle side plate (12) and the middle plate (6) are locked together along the thickness direction by the fasteners, so that the second isolation bushing is pressed between the adjacent surfaces of the middle side plate (12) and the panel (13). Each of the second isolation bushings has the same thickness, each of the first isolation bushings has the same thickness, and the thickness of the second isolation bushing is less than the thickness of the first isolation bushing.

2. The assembly method of the prefabricated lifting beam according to claim 1, characterized in that, The fastener includes a load-bearing pin (1) for connecting the end of the load-bearing weight rack, a long screw (9), and a short screw (14). The diameter of the load-bearing pin (1) is larger than the diameter of the long screw (9) or the short screw (14). The lengths of the load-bearing pin (1) and the long screw (9) are set to be able to penetrate the crossbeam body (100) as a whole along the plate thickness direction. The short screw (14) is used to pass through and lock the middle plate (6) and the middle side plates (12) on both sides along the plate thickness direction.

3. The assembly method of the prefabricated lifting beam according to claim 2, characterized in that, The first isolation bushing includes a first pin bushing (5) sleeved on the load-bearing pin (1) and a first screw bushing (11) sleeved on the long screw (9) or the short screw (14); the second isolation bushing includes a second pin bushing (4) sleeved on the load-bearing pin (1) and a second screw bushing (10) sleeved on the long screw (9) or the short screw (14).

4. The assembly method of the prefabricated lifting beam according to claim 1, characterized in that, The fastener is secured with a double nut, and the nut end is pressed against the outer surface of the bearing plate by a washer.

5. The assembly method of the prefabricated lifting beam according to any one of claims 1 to 4, characterized in that, The distance between the middle plate (6) and the middle side plate (12) arranged in parallel intervals is L1, and the distance between the middle side plate (12) and the front panel (13) arranged in parallel intervals is L2, and L1 and L2 satisfy the golden ratio relationship.

6. The assembly method of the prefabricated lifting beam according to claim 1, characterized in that, The step of fabricating the panel limiting frame (200) and fitting it onto both ends of the beam body (100) to frame the end face and / or peripheral wall of the beam body (100) includes: A rectangular box frame with one open end is made as the panel constraint frame (200). The open end of the panel limiting frame (200) is fitted onto both ends of the crossbeam body (100) and fixed by the fasteners.

7. The assembly method of the prefabricated lifting beam according to claim 6, characterized in that, The peripheral wall of the panel limiting frame (200) is provided with a frame wall through hole, and the fastener located at the end of the beam body (100) passes through the frame wall through hole and is locked to the outer peripheral wall of the panel limiting frame (200).

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