Lifting device of steel structure roof net rack

Abstract

A lifting device of a steel structure roof net rack comprises a lifting platform and a hydraulic lifter. The lifting platform comprises platform supporting columns, lifting platform beams and a platform frame. The platform strut is vertically fixed in the middle of the top surface of the concrete column; the lifting platform beam is transversely arranged at the top of the platform strut, and two ends respectively extend out of the concrete column to form cantilevers; four frame stand columns of the platform frame are fixed to the top faces of the concrete columns and surround the peripheries of the platform stand columns at equal intervals, and the two cantilevers extend out of the positions between every two frame stand columns. The two frame supporting rods are symmetrically and vertically arranged below the roots of the inner sides of the two cantilevers respectively; the two reinforcing rods are obliquely arranged between the frame supporting rods and the cantilevers on the same side respectively; and hydraulic lifters are mounted at the outer ends of the two cantilevers. Therefore, left and right synchronous lifting can be carried out, and the construction efficiency and safety are improved. The overall structure stability of the platform supporting columns, the frame stand columns and the frame supporting rods is good.

Description

Technical Field

[0001] The utility model relates to the technical field of building steel structure installation, in particular to a lifting device for a steel structure roof grid. Background Art

[0002] In the past, during the construction of steel structure grids, prefabricated components were mostly lifted by truck cranes and then spliced, installed or welded at high altitudes. This method had a slow construction progress and posed great safety risks in high-altitude operations. With the advancement of technology, people have gradually improved the lifting process and adopted a construction plan of ground-assembled grid structures using hydraulic lifting. This ensured the quality of grid assembly, greatly reduced the workload of high-altitude operations, ensured the construction period, saved investment, and greatly improved construction safety.

[0003] The commonly used lifting scheme is usually to set up a lifting platform on the concrete, install a single-sided cantilever beam, and then install a hydraulic lifter on the cantilever beam. The steel structure grid is lifted by installing lifting platforms on multiple concretes. However, the single lifting platform of this lifting scheme can only lift in one direction, and the construction efficiency is low.

[0004] Therefore, some existing lifting solutions will set symmetrical cantilever beams on both sides of the concrete lifting platform to install two hydraulic lifters, so as to achieve two-way lifting and improve construction efficiency. However, the structural stability of the existing lifting platform that can be lifted in both directions needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a lifting device for a steel structure roof grid.

[0006] In order to achieve the above objectives, the solution of the present invention is:

[0007] A lifting device for a steel structure roof grid comprises a lifting platform and a hydraulic lifter;

[0008] The lifting platform includes platform pillars, lifting platform beams and platform frames;

[0009] The platform pillar is vertically fixed on a concrete platform cast in the middle of the top surface of the concrete column; the lifting platform beam is horizontally arranged on the top of the platform pillar, and both ends extend outward from the concrete column to form a cantilever;

[0010] The platform frame includes four frame columns, two frame struts and two reinforcement rods; the four frame columns are fixed to the top surface of the concrete column and surround the outer periphery of the platform pillar at equal intervals, and two cantilevers extend from between two frame columns respectively; the two frame struts are symmetrically arranged below the inner roots of the two cantilevers; the two reinforcement rods are obliquely arranged between the frame struts and the cantilevers on the same side; support cross bars are also provided between adjacent frame columns and frame columns, and between adjacent frame columns and frame struts of the platform frame;

[0011] Hydraulic lifters are installed on the outer ends of the two cantilevers.

[0012] Furthermore, the platform pillars, lifting platform beams, frame columns and frame struts are all made of box-section steel; and the supporting cross bars are made of steel pipes or box-section steel.

[0013] Furthermore, the cantilever extends transversely, and an upper sling extending longitudinally is installed at the outer end of the cantilever; at least two hydraulic lifters are installed longitudinally at intervals on the upper sling; and the lower ends of the steel strands of the two hydraulic lifters are connected to a lower sling.

[0014] Furthermore, a transverse temporary rod is connected to the lower sling, and a temporary ball is provided at the outer end of the temporary rod away from the lower sling.

[0015] Furthermore, the supporting cross bars include several middle cross bars and several top cross bars, each middle cross bar is respectively connected to the middle between the frame columns and the frame columns or between the frame columns and the frame struts, and each top cross bar is respectively connected to the top between the frame columns and the frame columns or between the frame columns and the frame struts.

[0016] Furthermore, bottom reinforcement rods are connected between the bottoms of the two frame struts and the middle platform pillars, and the bottom reinforcement rods are close to the tops of the concrete columns.

[0017] Furthermore, the lower end of the reinforcement rod is connected to the middle part of the frame support rod, and the upper end is connected to the outer end of the cantilever.

[0018] Furthermore, it also includes a control system; the control system includes a main control box, a gravity sensor arranged on the temporary pole, and strain sensors on the reinforcement pole and the temporary pole, and the main control box is electrically connected to the gravity sensor and the strain sensor.

[0019] After adopting the above technical solution, the utility model installs the platform frame at the lifting point of the concrete column in the middle of the steel structure grid roof component. Since the lifting platform beam has cantilevers on both sides and hydraulic lifters are installed, the hydraulic lifters are connected to the steel structure grid roof component to be lifted through steel strands, so it can perform left and right bidirectional synchronous lifting, which speeds up the construction progress and improves construction efficiency and safety.

[0020] Furthermore, during the lifting operation, while one hydraulic lifter is lifting the steel structure grid roof components, the other hydraulic lifter can also simultaneously lift the steel structure grid roof components. The tension is maintained consistent by the tension gauges on the hydraulic lifters. The forces exerted on the lifting platform by the tension on both sides are transmitted to the platform pillars, reinforcement rods, and platform frame. In particular, the triangular structure formed between the diagonally arranged reinforcement rods, frame struts, and cantilever arms effectively strengthens and secures the platform. The forces acting on the platform pillars are transmitted to the concrete columns below via the concrete column platform, while the forces acting on the frame columns and frame struts are directly transmitted to the concrete columns below. As a result, during hydraulic lifting, the entire lifting platform is in a stable state of stress, and the overall structural stability is excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional schematic diagram of Example 1 of the present utility model;

[0022] Figure 2 This is a schematic diagram of the main view of Example 1 of the utility model;

[0023] Figure 3 This is a side view schematic diagram of Example 1 of the present utility model;

[0024] Figure 4 This is a schematic top view of Example 1 of the present utility model;

[0025] Figure 5 This is a schematic front view of Example 2 of the present utility model.

[0026] Explanation of reference numerals: lifting platform 1, platform pillar 11, lifting platform beam 12, cantilever 121, platform frame 13, frame column 131, frame strut 132, reinforcement rod 133, support cross bar 134, middle cross bar 1341, top cross bar 1342, bottom reinforcement rod 135, hydraulic lifter 2, steel strand 21, concrete column 3, concrete platform 31, steel structure grid roof component 4, upper sling 5, lower sling 6, temporary rod 7, temporary ball 8, control system 9, main control box 91, gravity sensor 92, strain sensor 93. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] like Figures 1 to 4The utility model provides a lifting device for a steel structure roof grid, comprising a lifting platform 1 and a hydraulic lifter 2 (all schematically drawn in the figures); the lifting platform 1 comprises a platform column 11, a lifting platform beam 12 and a platform frame 13; the platform column 11 is vertically fixed on a concrete platform 31 cast in the middle of the top surface of a concrete column 3; the lifting platform beam 12 is horizontally arranged on the top of the platform column 11, and its two ends extend outward from the concrete column 3 to form a cantilever 121.

[0029] The platform frame 13 includes four frame columns 131, two frame struts 132 and two reinforcement rods 133; the four frame columns 131 are fixed to the top surface of the concrete column 3 and are evenly spaced around the outer periphery of the platform pillar 11, and the two cantilevers 121 extend from between the two frame columns 131 respectively; and the two frame struts 132 are symmetrically erected below the inner roots of the two cantilevers 121; the two reinforcement rods 133 are respectively obliquely arranged between the frame struts 132 and the cantilevers 121 on the same side; support cross bars 134 are also provided between adjacent frame columns 131 and frame columns 131, and between adjacent frame columns 131 and frame struts 132 of the platform frame 13.

[0030] Hydraulic lifters 2 are installed at the outer ends of the two cantilevers 121 .

[0031] Thus, in this embodiment, after the platform frame 13 is installed at the lifting point of the concrete column 3 in the middle of the steel structure grid roof component 4 (only a partial structure is simply shown in the figure), since the lifting platform beam 12 has cantilevers 121 on both sides and hydraulic lifters 2 are installed, the hydraulic lifters 2 are connected to the steel structure grid roof component 4 to be lifted by the steel strand 21, so that left and right bidirectional synchronous lifting can be performed, which speeds up the construction progress and improves construction efficiency and safety.

[0032] During the lifting operation, when the hydraulic lifter 2 on one side lifts the steel structure grid roof component 4, the hydraulic lifter 2 on the other side can also lift the steel structure grid roof component 4 at the same time. The tension is maintained consistent by the tension reading meter on the hydraulic lifter 2, and the force generated by the tension on both sides on the lifting platform 1 is transmitted to the platform pillars 11, reinforcement rods 133, and platform frame 13. In particular, the triangular structure between the reinforcement rods 133, frame struts 132, and cantilever 121 can effectively strengthen the fixation. The force on the platform pillars 11 can be transmitted to the lower concrete column 3 through the platform of the lower concrete column 3, while the force on the frame columns 131 and frame struts 132 can be directly transmitted to the lower concrete column 3. As a result, during the hydraulic lifting, the entire lifting platform 1 is in a stable state under stress.

[0033] In this embodiment, the platform pillars 11, the lifting platform beams 12, the frame columns 131 and the frame struts 132 can all be made of box-section steel to ensure structural strength; and the support crossbars 134 can be made of steel pipes or box-section steel.

[0034] The support crossbars 134 include a plurality of middle crossbars 1341 and a plurality of top crossbars 1342. The middle crossbars 1341 are connected to the middle between the frame columns 131 and the frame columns 131 or between the frame columns 131 and the frame struts 132, and the top crossbars 1342 are connected to the top between the frame columns 131 and the frame columns 131 or between the frame columns 131 and the frame struts 132. The support crossbars 134 are provided to further improve the overall structural stability of the lifting platform 1.

[0035] The bottom of the two frame struts 132 and the middle platform pillar 11 are connected with a bottom reinforcement rod 135, and the bottom reinforcement rod 135 is close to the top of the concrete column 3. In this way, the stability of the frame struts 132 and the platform pillar 11 is enhanced.

[0036] The lower end of the reinforcing rod 133 can be connected to the middle of the frame support rod 132, and the upper end is connected to the outer end of the cantilever 121 to ensure the reinforcement effect.

[0037] In this embodiment, the cantilever 121 extends transversely, and a longitudinally extending upper sling 5 can be mounted on the outer end of the cantilever 121. The upper sling 5 can be welded to the outer end of the cantilever 121. At least two hydraulic lifters 2 are mounted longitudinally spaced apart on the upper sling 5. The lower ends of the steel strands 21 of the two hydraulic lifters 2 are connected to a lower sling 6. The lower ends of the steel strands 21 pass through the lower sling 6 and are then secured using high-strength bolts, steel plates, and anchor pads (not shown). Thus, the provision of an upper sling 5 allows for the installation of multiple hydraulic lifters 2, enhancing operational safety.

[0038] The lower sling 6 may also be connected to a temporary horizontal rod 7, with a temporary ball 8 provided at the outer end of the temporary rod 7 away from the lower sling 6. The temporary rod 7 is used to assist in lifting, and the temporary ball 8 is used to be welded to the steel structure grid roof component 4 to be lifted. After the lifting is completed, the welding between the steel structure grid roof component 4 and other components can be released, and the welding between the temporary ball 8 and the steel structure grid roof component 4 can be released.

[0039] Example 2

[0040] like Figure 5 As shown, the structure of this embodiment is basically the same as that of the above embodiment, the main difference being that this embodiment is further provided with a control system 9.

[0041] The control system 9 includes a main control box 91 , a gravity sensor 92 provided on the temporary pole 7 , and strain sensors 93 on the reinforcement pole 133 and the temporary pole 7 .

[0042] During the lifting process of the steel structure grid, the gravity sensor 92 installed on the temporary rod 7 monitors the acceleration of the steel structure grid components during the lifting process, and the strain sensor 93 installed on the reinforcement rod 133 and the temporary rod 7 monitors the deformation of the temporary rod 7 and the reinforcement rod 133 during the lifting process of the steel structure grid components.

[0043] The main control box 91 is electrically connected to the gravity sensor 92 and the strain sensor 93, and is used to evaluate whether there is any abnormality in the lifting process of the steel structure grid through dynamic acceleration analysis and deformation control. If there is an abnormality in the acceleration, the tension is adjusted through the hydraulic lifter 2 so that the lifting points of the steel structure grid components on the left and right sides can be stably and synchronously lifted; if there is an abnormality in the deformation, the tension is adjusted through the hydraulic lifter 2, and the tensioning is stopped if necessary, and the reinforcement rod 133 and the temporary rod 7 are checked to see if they are damaged during tensioning to avoid safety accidents.

[0044] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, equivalent changes and modifications that do not depart from the principles of the present invention should still fall within the scope of protection of the present invention.

[0045] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is conventionally placed when in use, or is the orientation or position relationship conventionally understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

Claims

1. A lifting device for a steel structure roof grid, characterized by: Includes lifting platform and hydraulic lifter; The lifting platform includes platform pillars, lifting platform beams and platform frames; The platform pillar is vertically fixed on a concrete platform cast in the middle of the top surface of the concrete column; the lifting platform beam is horizontally arranged on the top of the platform pillar, and both ends extend outward from the concrete column to form a cantilever; The platform frame includes four frame columns, two frame struts and two reinforcement rods; the four frame columns are fixed to the top surface of the concrete column and surround the outer periphery of the platform pillar at equal intervals, and two cantilevers extend from between two frame columns respectively; the two frame struts are symmetrically arranged below the inner roots of the two cantilevers; the two reinforcement rods are obliquely arranged between the frame struts and the cantilevers on the same side; support cross bars are also provided between adjacent frame columns and frame columns, and between adjacent frame columns and frame struts of the platform frame; Hydraulic lifters are installed on the outer ends of the two cantilevers.

2. The lifting device for a steel structure roof grid according to claim 1, characterized in that: The platform pillars, lifting platform beams, frame columns and frame struts are all made of box-section steel; the supporting cross bars are made of steel pipes or box-section steel.

3. The lifting device for a steel structure roof grid according to claim 1, characterized in that: The cantilever extends transversely, and an upper sling extending longitudinally is installed at the outer end of the cantilever; at least two hydraulic lifters are installed longitudinally at intervals on the upper sling; the lower ends of the steel strands of the two hydraulic lifters are connected to a lower sling.

4. The lifting device for a steel structure roof grid according to claim 3, characterized in that: The lower sling is connected with a transverse temporary rod, and an outer end of the temporary rod away from the lower sling is provided with a temporary ball.

5. The lifting device for a steel structure roof grid according to claim 1, characterized in that: The supporting cross bars include several middle cross bars and several top cross bars, each middle cross bar is respectively connected to the middle between the frame columns and the frame columns or between the frame columns and the frame struts, and each top cross bar is respectively connected to the top between the frame columns and the frame columns or between the frame columns and the frame struts.

6. The lifting device for a steel structure roof grid according to claim 1, characterized in that: A bottom reinforcement rod is connected between the bottom of the two frame struts and the middle platform pillar respectively, and the bottom reinforcement rod is close to the top of the concrete column.

7. The lifting device for a steel structure roof grid according to claim 1, characterized in that: The lower end of the reinforcement rod is connected to the middle part of the frame support rod, and the upper end is connected to the outer end of the cantilever.

8. The lifting device for a steel structure roof grid according to claim 1, characterized in that: It also includes a control system; the control system includes a main control box, a gravity sensor set on the temporary pole, and strain sensors on the reinforcement pole and the temporary pole, and the main control box is electrically connected to the gravity sensor and the strain sensor.

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