Steel net rack jacking overturn-preventing limiting structure

Abstract

The utility model relates to the technical field of steel net rack jacking, in particular to a steel net rack jacking overturn-preventing limiting structure which comprises a bearing base body unit, a jacking execution unit, a composite supporting unit and a dynamic locking mechanism. The top end of the embedded screw protrudes out of the surface of the concrete base, and the jacking execution unit comprises a hydraulic jack and a jacking disc arranged at the output end of the hydraulic jack. When the pre-tightening nut is screwed on the pre-embedded screw rod, the prismatic surface opposite to the pre-tightening nut is parallel to the inner side wall of the limiting groove, and the pre-tightening nut is limited by the limiting groove by turning over the connecting seat, so that dynamic load and vibration in the jacking process can be dealt with, and stable connection between the supporting seat and the pre-embedded screw rod is promoted; the defect that a traditional nut fastening mode is prone to loosening when subjected to complex stress is overcome, and meanwhile the risk that the steel net frame overturns is reduced.

Description

Technical Field

[0001] This utility model relates to the field of steel space frame lifting technology, and more specifically, to a steel space frame lifting anti-tipping limiting structure. Background Technology

[0002] Steel space frame jacking is an important technique used in building construction for the installation of large-span steel space frame structures. During construction, the steel space frame is first assembled in sections on the ground. Then, using specialized equipment such as hydraulic jacks and jacking supports, the assembled steel space frame is gradually lifted to the design height according to predetermined steps. Finally, it is connected and secured at high altitude.

[0003] In traditional steel space frame jacking and limiting structures, jacks are mostly fixed to the concrete foundation by tightening nuts. This installation method is prone to loosening and displacement when faced with dynamic loads, vibrations, and long-term continuous stress during the jacking process, and cannot form a stable limiting constraint, which in turn leads to the risk of the steel space frame overturning. Utility Model Content

[0004] This utility model proposes a steel space frame lifting anti-overturning limiting structure, which solves the technical problem that the traditional method of relying on nut fastening is prone to loosening and displacement when facing dynamic loads, vibrations and long-term continuous forces during the lifting process, and cannot form a stable limiting constraint, thus leading to the risk of steel space frame overturning.

[0005] To solve the above-mentioned technical problems, this utility model proposes a steel grid frame lifting anti-overturning limiting structure, which includes a bearing base unit, a lifting execution unit, a composite support unit, and a dynamic locking mechanism.

[0006] The supporting base unit includes a concrete base and a pre-embedded screw rod vertically embedded inside it, with the top end of the pre-embedded screw rod protruding from the surface of the concrete base.

[0007] The lifting actuator includes a hydraulic jack and a top plate located at its output end;

[0008] The composite support unit includes a support base sleeved on the outer periphery of the hydraulic jack and multiple reinforcing plates evenly distributed circumferentially between the support base and the hydraulic jack. The top of the support base is provided with a connection hole corresponding to the position of the pre-embedded screw, and each reinforcing plate is provided with an installation hole.

[0009] The dynamic locking mechanism includes a preload nut threadedly connected to a pre-embedded screw, a rotating shaft rotatably connected in a mounting hole, and a connecting seat fixed to the outer wall of the rotating shaft. The end of the connecting seat is provided with a limiting groove that matches the outer contour of the preload nut. By rotating the connecting seat, the limiting groove is engaged with the prism surface of the preload nut.

[0010] Preferably, a pre-embedded steel plate is welded to the bottom of the pre-embedded screw, the pre-embedded steel plate is embedded inside the concrete base and has anti-pull-out protrusions on its surface.

[0011] Preferably, the reinforcing plate has an arc-shaped fixing groove on the side facing the hydraulic jack, and a fixing ring is welded to the corresponding position on the outer shell of the hydraulic jack, the fixing ring being welded into the corresponding fixing groove.

[0012] Preferably, it also includes a guide linkage assembly, which includes multiple sliding sleeves vertically fixed to the top of the support base, sliding rods that slide in cooperation with the sliding sleeves, and annular connecting plates fixed to the outer wall of each sliding rod. The output end of the hydraulic jack is fixed with a connecting ring, and the connecting ring is fixedly connected to the end of the connecting plate.

[0013] Preferably, the slide bar surface is coated with a low-friction coefficient coating and has laser-etched stroke scale lines evenly spaced along the axial direction.

[0014] Preferably, the connection between the embedded steel plate and the embedded screw is provided with radially distributed fan-shaped reinforcing ribs.

[0015] Preferably, the bottom surface of the top plate is provided with a pressure sensor array, and the pressure sensor array signal is connected to the PLC control system of the hydraulic jack.

[0016] The beneficial effects of this utility model, achieved through the above technical solution, are as follows:

[0017] 1. When the pre-tightening nut is screwed onto the embedded screw, the prism face of the pre-tightening nut is parallel to the inner wall of the limiting groove. By flipping the connecting seat, the limiting groove limits the pre-tightening nut, which can cope with the dynamic load and vibration during the jacking process, promote the stable connection between the support seat and the embedded screw, make up for the defect of traditional nut fastening method that is easy to loosen when facing complex forces, and at the same time reduce the risk of the steel grid frame overturning.

[0018] 2. During the pouring of the concrete base, the pre-embedded screw rod with the pre-embedded steel plate and the pull-out resistance protrusion is embedded in the concrete base. After the concrete solidifies, the pull-out resistance protrusion is tightly embedded in the concrete. When the external force is generated during the jacking process and applied to the pre-embedded screw rod, the pre-embedded steel plate disperses the force to the surrounding concrete through the pull-out resistance protrusion. The compressive strength of the concrete and the friction between the two are used to resist the influence of the external force on the pre-embedded screw rod and improve the stability of the pre-embedded screw rod. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the installation structure of the embedded steel plate of this utility model;

[0021] Figure 3This is a schematic diagram of the structure of the support base of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the connector of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the reinforcing plate of this utility model.

[0024] In the diagram: 1. Concrete base; 2. Embedded screw; 3. Embedded steel plate; 4. Support seat; 5. Connecting hole; 6. Pre-tightening nut; 7. Reinforcing plate; 8. Mounting hole; 9. Connecting seat; 10. Rotating shaft; 11. Limiting groove; 12. Fixing groove; 13. Fixing ring; 14. Hydraulic jack; 15. Top plate; 16. Sliding sleeve; 17. Sliding rod; 18. Connecting plate; 19. Connecting ring. Detailed Implementation

[0025] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model. In this utility model, unless otherwise expressly specified and limited, the term "fixed connection" should be interpreted broadly. For example, "fixed connection" can mean fixed installation, detachable connection, or integral; it can mean mechanical connection or electrical connection; it can mean direct connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, a steel space frame lifting anti-overturning limiting structure includes a load-bearing base unit, a lifting execution unit, a composite support unit, and a dynamic locking mechanism;

[0027] The supporting base unit includes a concrete base 1 and a pre-embedded screw 2 vertically embedded inside it, with the top end of the pre-embedded screw 2 protruding from the surface of the concrete base 1;

[0028] The lifting actuator includes a hydraulic jack 14 and a top plate 15 disposed at its output end;

[0029] The composite support unit includes a support base 4 sleeved on the outer periphery of the hydraulic jack 14, and multiple reinforcing plates 7 evenly distributed circumferentially between the support base 4 and the hydraulic jack 14. The top of the support base 4 is provided with a connection hole 5 corresponding to the position of the pre-embedded screw 2. The bottom of the reinforcing plate 7 is fixedly connected to the support base 4. Each reinforcing plate 7 is provided with an installation hole 8.

[0030] The dynamic locking mechanism includes a preload nut 6 threadedly connected to the pre-embedded screw 2, a rotating shaft 10 rotatably connected in the mounting hole 8, and a connecting seat 9 fixed to the outer wall of the rotating shaft 10. The end of the connecting seat 9 is provided with a limiting groove 11 that matches the outer contour of the preload nut 6. By rotating the connecting seat 9, the limiting groove 11 is engaged with the prism surface of the preload nut 6.

[0031] When the pre-tightening nut 6 is screwed onto the pre-embedded screw 2, the opposing prism surfaces of the pre-tightening nut 6 are parallel to the inner wall of the limiting groove 11. By flipping the connecting seat 9, the limiting groove 11 limits the pre-tightening nut 6, which can effectively cope with the dynamic load and vibration during the jacking process, improve the stable connection between the support seat 4 and the pre-embedded screw 2, make up for the defect of traditional nut fastening method that is prone to loosening when facing complex forces, and at the same time reduce the risk of the steel grid frame overturning.

[0032] like Figure 2 As shown, in some embodiments, a pre-embedded steel plate 3 is welded to the bottom of the pre-embedded screw 2. The pre-embedded steel plate 3 is embedded inside the concrete base 1 and has anti-pull-out protrusions on its surface.

[0033] During the pouring of the concrete base 1, the pre-embedded screw rod 2 with the pre-embedded steel plate 3 and the pull-out bulge is embedded in the concrete base 1. After the concrete solidifies, the pull-out bulge is tightly embedded in the concrete. When the external force is generated during the jacking process and applied to the pre-embedded screw rod 2, the pre-embedded steel plate 3 disperses the force to the surrounding concrete through the pull-out bulge. By utilizing the compressive strength of the concrete and the friction between the two, the influence of the external force on the pre-embedded screw rod 2 is resisted, which improves the stability of the pre-embedded screw rod 2 to a certain extent.

[0034] The bottom of the pre-embedded screw 2 is welded with a pre-embedded steel plate 3 and has pull-out bulges, which enhances the connection strength and anchoring force between the pre-embedded screw 2 and the concrete base 1. The pull-out bulges increase the friction and engagement between the pre-embedded steel plate 3 and the concrete, making it less likely for the pre-embedded screw 2 to be pulled out of the concrete base 1 or to be displaced when subjected to dynamic loads, vibrations and long-term continuous forces during the jacking process. This can reduce the risk of the steel grid structure overturning to a certain extent.

[0035] like Figure 1 As shown, in some embodiments, the reinforcing plate 7 has an arc-shaped fixing groove 12 on the side facing the hydraulic jack 14, and a fixing ring 13 is welded to the corresponding position on the outer shell of the hydraulic jack 14. The fixing ring 13 is welded into the corresponding fixing groove 12.

[0036] During installation, align the fixing ring 13 on the outer shell of the hydraulic jack 14 with the fixing groove 12 of the reinforcing plate 7, and securely fix the fixing ring 13 in the fixing groove 12 by welding. The design of the reinforcing plate 7, the fixing groove 12, and the fixing ring 13 enhances the connection strength and stability between the support base 4 and the hydraulic jack 14. During the lifting process, when the hydraulic jack 14 is subjected to pressure from the steel grid frame, the connection structure between the fixing ring 13 and the fixing groove 12 can transfer the force to the reinforcing plate 7 and the support base 4. The structural strength of the reinforcing plate 7 and the support base 4 is used to resist external forces, which can improve the stability of the hydraulic jack 14 to a certain extent.

[0037] like Figure 1 As shown, in some embodiments, a guide linkage assembly is also included, which includes multiple sliding sleeves 16 vertically fixed to the top of the support base 4, sliding rods 17 that slide with the sliding sleeves 16, and annular connecting plates 18 fixed to the outer wall of each sliding rod 17. A connecting ring 19 is fixed to the output end of the hydraulic jack 14. The connecting ring 19 is fixedly connected to the end of the connecting plate 18. The sliding sleeves 16 are distributed in annular and equally spaced structure on the top of the support base 4, and the sliding sleeves 16 are located between two adjacent connecting bases 9.

[0038] When the hydraulic jack 14 starts to lift, its output end pushes the connecting ring 19 to rise. The connecting ring 19 drives the connecting plate 18 to move upward. The connecting plate 18 achieves vertical limiting movement through the sliding of the slide rod 17 in the sliding sleeve 16. The guiding effect of the sliding sleeve 16 on the slide rod 17 restricts the horizontal displacement of the slide rod 17, thereby ensuring the vertical lifting of the hydraulic jack 14 and avoiding tilting or deviation.

[0039] In some possible embodiments, the surface of the slide bar 17 is coated with a low coefficient of friction coating and has laser-etched stroke scale lines at equal intervals along the axial direction.

[0040] The slide rod 17 is coated with a low-friction coefficient coating, which reduces the frictional resistance between the slide rod 17 and the slide sleeve 16, making the lifting process of the hydraulic jack 14 smoother; the stroke scale lines are laser-etched, making it easy for operators to observe the lifting height of the hydraulic jack 14.

[0041] In some possible embodiments, the connection between the embedded steel plate 3 and the embedded screw 2 is provided with radially distributed fan-shaped reinforcing ribs. This design can improve the structural strength and fatigue resistance of the connection between the embedded screw 2 and the embedded steel plate 3 to a certain extent. When bearing complex loads during the jacking process, the reinforcing ribs can disperse stress and avoid stress concentration at the connection to a certain extent, which facilitates a stable connection between the embedded screw 2 and the concrete base 1.

[0042] The reinforcing plate 7 is connected to the support base 4 by welding, and two adjacent reinforcing plates 7 are arranged perpendicularly to each other.

[0043] In some possible embodiments, a pressure sensor array is provided on the bottom surface of the top plate 15, and the pressure sensor array signal is connected to the PLC control system of the hydraulic jack 14.

[0044] During the lifting of the steel space frame, the pressure sensor array collects pressure data at various points on the contact surface between the top plate 15 and the steel space frame in real time, and converts this data into electrical signals that are transmitted to the PLC control system. The PLC control system analyzes and processes these signals and compares them with preset pressure parameters. If a significant difference is found in the pressure at a certain location compared to other locations, the PLC control system automatically adjusts the hydraulic output of the corresponding hydraulic jack 14, increasing or decreasing the lifting force of the hydraulic jack 14 to balance the forces on various parts of the steel space frame. It should be noted that the circuit connection and control process of the sensors, PLC, and actuators are existing technologies and are connection schemes that can be conventionally selected by those skilled in the art based on actual working conditions. The specific circuit design does not need to be elaborated.

[0045] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A steel space frame lifting anti-tipping limiting structure, characterized in that, include: The supporting base unit includes a concrete base (1) and a pre-embedded screw (2) vertically embedded inside it, the top end of the pre-embedded screw (2) protruding from the surface of the concrete base (1); The lifting actuator includes a hydraulic jack (14) and a top plate (15) disposed at its output end. The composite support unit includes a support base (4) sleeved on the outer periphery of the hydraulic jack (14) and multiple reinforcing plates (7) evenly distributed circumferentially between the support base (4) and the hydraulic jack (14). The bottom of the reinforcing plate (7) is fixedly connected to the support base (4). The top of the support base (4) is provided with a connection hole (5) corresponding to the position of the pre-embedded screw (2). Each reinforcing plate (7) is provided with an installation hole (8). The dynamic locking mechanism includes a preload nut (6) threadedly connected to the pre-embedded screw (2), a rotating shaft (10) rotatably connected in the mounting hole (8), and a connecting seat (9) fixed to the outer wall of the rotating shaft (10). The end of the connecting seat (9) is provided with a limiting groove (11) that matches the outer contour of the preload nut (6). By rotating the connecting seat (9), the limiting groove (11) is engaged with the prism surface of the preload nut (6).

2. The steel space frame lifting anti-overturning limiting structure according to claim 1, characterized in that: The bottom of the pre-embedded screw (2) is welded with a pre-embedded steel plate (3), which is embedded in the concrete base (1) and has anti-pull-out protrusions on its surface.

3. The steel space frame lifting anti-overturning limiting structure according to claim 2, characterized in that: The reinforcing plate (7) has an arc-shaped fixing groove (12) on the side facing the hydraulic jack (14). The fixing ring (13) is welded to the corresponding position of the outer shell of the hydraulic jack (14). The fixing ring (13) is welded into the corresponding fixing groove (12).

4. The steel space frame lifting anti-overturning limiting structure according to claim 3, characterized in that: It also includes a guide linkage assembly, which includes multiple sliding sleeves (16) vertically fixed to the top of the support base (4), sliding rods (17) that slide in cooperation with the sliding sleeves (16), and annular connecting plates (18) fixed to the outer wall of each sliding rod (17).

5. The steel space frame lifting anti-overturning limiting structure according to claim 4, characterized in that: The sliding sleeve (16) is distributed in a ring-shaped, equally spaced structure on the top of the support base (4), and the sliding sleeve (16) is located between two adjacent connecting bases (9).

6. The steel space frame lifting anti-overturning limiting structure according to claim 5, characterized in that: The output end of the hydraulic jack (14) is fixed with a connecting ring (19), and the connecting ring (19) is fixedly connected to the end of the connecting plate (18).

7. The steel space frame lifting anti-overturning limiting structure according to claim 6, characterized in that: The slide bar (17) is coated with a low friction coefficient coating and has laser-etched stroke scale lines at equal intervals along the axial direction.

8. The steel space frame lifting anti-overturning limiting structure according to claim 7, characterized in that: The two adjacent reinforcing plates (7) are arranged perpendicularly to each other.

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