Sectional hoisting construction method and device for steel truss

Abstract

The invention provides a steel truss segmented hoisting construction method, which comprises a construction method, and the construction method comprises the following steps: step 1, selecting a stress point and a gravity center line; step 2, constructing a model: constructing a steel truss model consistent with reality through finite element numerical simulation software; thirdly, constraints in the X direction, the Y direction and the Z direction of the lifting hook are set, the specific shape and mode of the steel net frame are adjusted according to needs, and the limiting directions of the X direction, the Y direction and the Z direction of the steel rope are determined; and fourthly, the hanging beam is assembled. When the segmented hoisting construction device for the steel truss is used, the displacement of the limiting seat between the fixed seat and the movable seat is adjusted, the width between the bearing seats is adjusted, the bearing area of the steel truss with different lengths is adjusted, in addition, the bearing seats can be rotated on the limiting seat through the connecting seat according to the width of the steel truss while the bearing seats are horizontally adjusted, and the hoisting construction device is convenient to use. The bearing direction is changed through rotation, and hoisting of steel net racks of different sizes is achieved.

Description

Technical Field

[0001] The invention relates to the field of steel grid hoisting equipment, and in particular to a steel grid segmented hoisting construction method and device. Background Art

[0002] The size of steel grid structures is increasing. Due to the advantages of steel structures such as light weight, high rigidity and good seismic performance, a single crane is generally used for lifting and installation in actual projects. Due to the small number of lifting fulcrums, the steel grid is prone to local buckling, causing damage to the steel grid. In order to prevent this from happening, multiple cranes are usually used for collaborative lifting operations, but there are problems such as poor coordination and low work efficiency during the lifting process.

[0003] According to the patent document with the existing publication number CN115092806A, a lifting beam device and a design method for lifting a steel grid frame are disclosed, which includes a single crane hook and a lifting beam structure composed of a box model. The lifting beam structure is connected to the single crane hook by a steel rope, a hook is arranged at the lower part of the lifting beam structure and the steel grid structure is connected by the hook, and the lifting beam structure is composed of at least two box models spliced ​​together, and the adjacent box models are connected by high-strength bolts. When using this technical solution, the deformation characteristics of the steel grid structure can be accurately known through numerical simulation, and the maximum spacing and the minimum number of lifting beam hooks can be reversely designed by comparing the model deformation value with the allowable deformation value, so as to ensure the stability of the steel grid lifting and save the cost. With respect to the above technical solution, although the solution reduces the number of hooks, it is impossible to adjust the width of the lifting beam according to the length of the steel grid when lifting the steel grid, and it is impossible to adjust the lifting according to steel grids of different widths and directions, which is inconvenient when using it. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a method and device for the segmented lifting construction of a steel grid frame to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. When in use, the limit seat is displaced and adjusted between the fixed seat and the movable seat, the width between the load-bearing seats is adjusted, and the load-bearing area is adjusted for steel grid frames of different lengths. In addition, while the load-bearing seat is adjusted horizontally, the load-bearing seat can be rotated on the limit seat through the connecting seat according to the width of the steel grid frame. The rotation changes the load-bearing direction to realize the lifting of steel grid frames of different sizes.

[0005] In order to achieve the above object, the present invention is implemented through the following technical scheme: a steel grid segmented hoisting construction method, including a construction method, the construction method comprising the following steps:

[0006] Step 1: Select the force point and center of gravity line;

[0007] Step 2: Construct a model by using finite element numerical simulation software to construct a steel grid model consistent with the actual situation;

[0008] Step 3: Set the constraints of the hook in the three directions of X, Y, and Z, adjust the specific shape and method of the steel grid as needed, and determine the limit directions of the steel rope in the three directions of X, Y, and Z;

[0009] Step 4: Assemble the hanging beam;

[0010] Step 5: Connect the hanging beam to the steel grid;

[0011] Step 6: Install the crane hook and connect it to the hanging beam.

[0012] In this embodiment, in the step one, the maximum distance between adjacent stress points on the steel grid model is obtained based on the maximum allowable deformation value, maximum bending stress and maximum torque of the steel grid, and the center of gravity of the steel grid is determined, wherein the stress points should be distributed around the center of gravity of the steel grid so that the steel grid can maintain a stable shape after being subjected to vertical force.

[0013] In this embodiment, in step 4, the hanging beam is assembled according to the size of the steel grid and the number of stress points, so that the stress points of the hanging beam and the steel grid are located on the same vertical line.

[0014] In this embodiment, in the step 2, the material parameters of the steel rope model are adjusted according to the data comparison, and then the elongation of the steel rope model is obtained according to the displacement cloud map and compared with the allowable elongation until the elongation of the steel rope model is less than the allowable elongation, and the material parameters of the steel rope are determined.

[0015] The steel grid segmented lifting construction device used in the steel grid segmented lifting construction method as described in claim 1 includes a fixed seat, the fixed seat is provided with an opening, a support column is movably installed inside the opening, a lifting ring is fixed to one end of the support column, the fixed seat is provided with an opening, a movable seat is movably installed on one side of the opening, and limiting grooves are provided on the movable seat and the fixed seat.

[0016] Furthermore, a limiting plate is movably installed inside the limiting groove, a limiting seat is welded between the limiting plates, a fixing ring is fixed on the top of the limiting seat, and a load-bearing seat is movably installed on the bottom of the limiting seat.

[0017] Furthermore, a support ring is fixed inside the load-bearing seat, a connecting seat is welded on the load-bearing seat, a cavity is opened inside the limit seat, an annular groove is opened on the inner wall of the cavity, a limit plate is movably installed inside the annular groove, and the limit plate is fixed on the connecting seat.

[0018] Furthermore, a positioning hole and a threaded hole are formed on the fixed seat, a limiting screw is rotatably installed inside the threaded hole, a positioning column is movably installed inside the positioning hole, one end of the positioning column is fixed on the movable seat, and the limiting screw is rotatably installed on the movable seat.

[0019] Furthermore, a limiting hole is provided on the connecting seat, a limiting column is movably installed inside the limiting hole, one end of the limiting column is respectively welded to the movable seat and the fixed seat, and a fixing hole is provided on the limiting seat, and the fixing hole cooperates with the limiting hole.

[0020] Furthermore, a slide groove is provided on the inner wall of the opening, a slider is movably installed inside the slide groove, one end of the slider is fixed on a support column, a bearing seat is fixed on the bottom of the support column, and a threaded column is movably installed on the bearing seat.

[0021] Beneficial effects of the present invention:

[0022] 1. This kind of steel grid segmented lifting construction device, when in use, the limit seat is displaced and adjusted between the fixed seat and the movable seat, the width between the load-bearing seats is adjusted, and the load-bearing area is adjusted for steel grids of different lengths. In addition, while the load-bearing seat is adjusted horizontally, the load-bearing seat can be rotated on the limit seat through the connecting seat according to the width of the steel grid, and the rotation changes the load-bearing direction to realize the lifting of steel grids of different sizes.

[0023] 2. In this steel grid segmented lifting construction device, the limit column and the limit plate provide double support for the limit seat and limit and fix the connecting seat at the same time. The limit column limits and fixes the connecting seat from the side of the limit seat to avoid the influence caused by the shaking of the limit seat inside the opening. The support column can adjust the height of the support column under the push of the threaded column, so that the height of the lifting ring is adjusted according to the position of the fixing ring to avoid damage caused by the tightening of the connecting steel cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the steps of a steel grid segmented hoisting construction method of the present invention;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of a hanging beam of a steel grid segmented hanging construction device of the present invention;

[0026] Figure 3 It is a structural schematic diagram of a steel grid segmented hoisting construction device of the present invention after the movable seat is removed;

[0027] Figure 4 It is a schematic diagram of the side cross-sectional structure of a fixing seat of a steel grid segmented hoisting construction device of the present invention;

[0028] Figure 5It is a schematic diagram of a top view cross-sectional structure of a limit seat of a steel grid segmented hoisting construction device of the present invention;

[0029] Figure 6 It is a schematic diagram of the side cross-sectional structure of a fixing seat of a steel grid segmented hoisting construction device of the present invention;

[0030] Figure 7 It is a schematic diagram of the bottom structure of a load-bearing seat of a steel grid segmented hoisting construction device of the present invention;

[0031] In the figure: 1. fixed seat; 2. opening; 3. support column; 4. lifting ring; 5. opening; 6. limiting column; 7. movable seat; 8. limiting groove; 9. limiting seat; 10. fixing ring; 11. limiting screw; 12. limiting plate; 13. fixing hole; 14. positioning column; 15. threaded hole; 16. load-bearing seat; 17. ring groove; 18. limiting plate; 19. connecting seat; 20. limiting hole; 21. bearing seat; 22. threaded column; 23. support ring; 24. slide groove; 25. slider. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] See also Figures 1 to 7 The present invention provides a technical solution: a steel grid segmented hoisting construction method, including a construction method, the construction method comprising the following steps:

[0034] Step 1: Select the force point and center of gravity line;

[0035] Step 2: Construct a model by using finite element numerical simulation software to construct a steel grid model consistent with the actual situation;

[0036] Step 3: Set the constraints of the hook in the three directions of X, Y, and Z, adjust the specific shape and method of the steel grid as needed, and determine the limit directions of the steel rope in the three directions of X, Y, and Z;

[0037] Step 4: Assemble the hanging beam;

[0038] Step 5: Connect the hanging beam to the steel grid;

[0039] Step 6: Install the crane hook and connect it to the hanging beam.

[0040] In this embodiment, in the step 1, the maximum distance between adjacent stress points on the steel grid model is obtained based on the maximum allowable deformation value, maximum bending stress and maximum torque of the steel grid, and the center of gravity of the steel grid is determined, wherein the stress points should be distributed around the center of gravity of the steel grid so that the steel grid can maintain a stable shape after being subjected to vertical force. In the step 4, the hanging beam is assembled according to the size of the steel grid and the number of stress points, so that the stress points of the hanging beam and the steel grid are located on the same vertical line. In the step 2, the material parameters of the steel rope model are adjusted according to data comparison, and then the elongation of the steel rope model is obtained according to the displacement cloud map and compared with the allowable elongation until the elongation of the steel rope model is less than the allowable elongation, and the material parameters of the steel rope are determined.

[0041] The steel grid segmented hoisting construction device used in the steel grid segmented hoisting construction method as described in claim 1 comprises a hoisting device, comprising a fixed seat 1, an opening 2 is formed on the fixed seat 1, a support column 3 is movably installed inside the opening 2, a lifting ring 4 is fixed to one end of the support column 3, an opening 5 is formed on the fixed seat 1, a movable seat 7 is movably installed on one side of the opening 5, a limiting groove 8 is formed on the movable seat 7 and the fixed seat 1, a limiting plate 12 is movably installed inside the limiting groove 8, a limiting seat 9 is welded between the limiting plates 12, and a fixed seat 9 is fixed on the top The fixed ring 10, a load-bearing seat 16 is movably installed at the bottom of the limit seat 9, a support ring 23 is fixed inside the load-bearing seat 16, a connecting seat 19 is welded on the load-bearing seat 16, a cavity is opened inside the limit seat 9, an annular groove 17 is opened on the inner wall of the cavity, a limit plate 18 is movably installed inside the annular groove 17, the limit plate 18 is fixed on the connecting seat 19, the limit plate 18 cooperates with the annular groove 17 to provide support points for the connecting seat 19 and the load-bearing seat 16, and while improving the support point, the connecting seat 19 can be rotated and adjusted inside the limit seat 9 to adjust the direction of the two ends of the load-bearing seat 16.

[0042] In this embodiment, a positioning hole and a threaded hole 15 are provided on the fixed seat 1, a limiting screw 11 is rotatably installed inside the threaded hole 15, a positioning column 14 is movably installed inside the positioning hole, one end of the positioning column 14 is fixed on the movable seat 7, the limiting screw 11 is rotatably installed on the movable seat 7, a limiting hole 20 is provided on the connecting seat 19, a limiting column 6 is movably installed inside the limiting hole 20, one end of the limiting column 6 is respectively welded to the movable seat 7 and the fixed seat 1, a fixing hole 13 is provided on the limiting seat 9, the fixing hole 13 cooperates with the limiting hole 20, a sliding groove 24 is provided on the inner wall of the opening 2, a slider 25 is movably installed inside the sliding groove 24, one end of the slider 25 is fixed on the supporting column 3, a bearing seat 21 is fixed at the bottom of the supporting column 3, a threaded column 22 is movably installed on the bearing seat 21, the supporting column 3 is pushed up and down by the threaded column 22, and the tightness of the steel cable is adjusted according to the position of the limiting seat 9.

[0043] When the device is in use, the width between the load-bearing seats 16 is first adjusted according to the length of the steel grid. When the length of the steel grid is wider than the length of the fixed seat 1, the position of the load-bearing seat 16 is adjusted in order to lift the load-bearing area. By rotating the limit screw 11, the limit screw 11 rotates inside the threaded hole 15. When the limit screw 11 rotates, it pushes the movable seat 7 to move outward. While the movable seat 7 moves outward, the positioning column 14 moves inside the positioning hole. The positioning column 14 provides support for the movable seat 7. When the movable seat 7 moves to the maximum extent, the limit seat 9 is moved in the direction of the fixed seat 1. The limit seat 9 moves to separate the fixing hole 13 from the limit column 6. After the limit column 6 is pulled out from the fixing hole 13, the limit plate 12 continues to be installed in the limiting groove 8. The limit plate 12 and the positioning column 14 cooperate to keep the movable seat 7 limited and fixed. The limit seat 9 is moved inside the limiting groove 8 through the limit plate 12 to move and adjust the width between the load-bearing seats 16. When the adjustment is completed, the fixed hole 1 on the limit seat 9 is 3 first enters the limiting column 6 on the movable seat 7, rotates the limiting screw 11 to push the movable seat 7 to move to the other side of the fixed seat 1, and after the movement, the limiting column 6 simultaneously enters the inside of the limiting seat 9. Before the limiting seat 9 is returned to its position, the direction of the load-bearing seat 16 can be adjusted according to the width of the steel grid. When the direction of the load-bearing seat 16 is adjusted, the connecting seat 19 rotates 90 degrees inside the limiting seat 9, and the limiting column 6 enters the inside of the limiting hole 20 to limit the connecting seat 19. The direction and position of the load-bearing seat 16 are adjusted. Adjust, rotate the support ring 23 to the position in contact with the steel grid, so as to determine the adjustment of the overall force point and center line of the fixed seat 1. When the limit seat 9 moves toward the two ends of the fixed seat 1, rotate the threaded column 22 to make the support column 3 descend inside the opening 2. The descent of the support column 3 reduces the height of the lifting ring 4. After the lifting ring 4 is lowered, it provides a moving distance for the steel cable on the fixed ring 10. During the later lifting, the lifting ring 4 is connected to the hook, and the support ring 23 is connected to the steel grid through a steel wire or a fixed hook for lifting.

[0044] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A steel grid segmented hoisting construction method, comprising a construction method, characterized in that: The construction method comprises the following steps: Step 1: Select the force point and center of gravity line; Step 2: Construct a model by using finite element numerical simulation software to construct a steel grid model consistent with the actual situation; Step 3: Set the constraints of the hook in the three directions of X, Y, and Z, adjust the specific shape and method of the steel grid as needed, and determine the limit directions of the steel rope in the three directions of X, Y, and Z; Step 4: Assemble the hanging beam; Step 5: Connect the hanging beam to the steel grid; Step 6: Install the crane hook and connect it to the hanging beam.

2. A steel grid segmented hoisting construction method according to claim 1, characterized in that: In the step 1, the maximum distance between adjacent stress points on the steel grid model is obtained based on the maximum allowable deformation value, maximum bending stress and maximum torque of the steel grid, and the center of gravity of the steel grid is determined, wherein the stress points should be distributed around the center of gravity of the steel grid so that the steel grid can maintain a stable shape after being subjected to vertical force.

3. The method for sectional hoisting of a steel grid according to claim 1 is characterized in that: In the step 4, the hanging beam is assembled according to the size of the steel grid and the number of stress points, so that the stress points of the hanging beam and the steel grid are located on the same vertical line.

4. The method for sectional hoisting of a steel grid according to claim 1 is characterized in that: In the step 2, the material parameters of the steel rope model are adjusted according to the data comparison, and then the elongation of the steel rope model is obtained according to the displacement cloud map and compared with the allowable elongation until the elongation of the steel rope model is less than the allowable elongation, and the material parameters of the steel rope are determined.

5. The steel grid segmented hoisting construction device used in the steel grid segmented hoisting construction method as claimed in claim 1 comprises a hoisting device, comprising a fixing seat (1), characterized in that: The fixed seat (1) is provided with an opening (2), a support column (3) is movably mounted inside the opening (2), a lifting ring (4) is fixed to one end of the support column (3), an opening (5) is provided on the fixed seat (1), a movable seat (7) is movably mounted on one side of the opening (5), and limiting grooves (8) are provided on both the movable seat (7) and the fixed seat (1).

6. The steel grid segmented hoisting construction device according to claim 5 is characterized by: A limiting plate (12) is movably mounted inside the limiting groove (8), a limiting seat (9) is welded between the limiting plates (12), a fixing ring (10) is fixed on the top of the limiting seat (9), and a load-bearing seat (16) is movably mounted on the bottom of the limiting seat (9).

7. The steel grid segmented hoisting construction device according to claim 6 is characterized by: A support ring (23) is fixed inside the load-bearing seat (16), a connecting seat (19) is welded on the load-bearing seat (16), a cavity is opened inside the limit seat (9), an annular groove (17) is opened on the inner wall of the cavity, a limit plate (18) is movably installed inside the annular groove (17), and the limit plate (18) is fixed on the connecting seat (19).

8. The steel grid segmented hoisting construction device according to claim 5 is characterized by: The fixed seat (1) is provided with a positioning hole and a threaded hole (15); a limiting screw (11) is rotatably mounted inside the threaded hole (15); a positioning column (14) is movably mounted inside the positioning hole; one end of the positioning column (14) is fixed on the movable seat (7); and the limiting screw (11) is rotatably mounted on the movable seat (7).

9. The steel grid segmented hoisting construction device according to claim 7, characterized in that: The connecting seat (19) is provided with a limiting hole (20), a limiting column (6) is movably installed inside the limiting hole (20), one end of the limiting column (6) is respectively welded to the movable seat (7) and the fixed seat (1), and the limiting seat (9) is provided with a fixing hole (13), and the fixing hole (13) matches the limiting hole (20).

10. The steel grid segmented hoisting construction device according to claim 5, characterized in that: A slide groove (24) is provided on the inner wall of the opening (2), a slider (25) is movably installed inside the slide groove (24), one end of the slider (25) is fixed on the support column (3), a bearing seat (21) is fixed on the bottom of the support column (3), and a threaded column (22) is movably installed on the bearing seat (21).

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