A hoisting device for a section steel arch

Abstract

The utility model relates to the technical field of profiled steel arch frame, and disclose a hoisting device for profiled steel arch frame, including two parallel bearing frame that set up, the lower end symmetry of bearing frame is provided with support frame, one side of support frame is installed with electric push rod, sliding connection has the moving link between support frame, the moving link can be along the length direction of support frame activity, one end of moving link is connected with the push rod of electric push rod, the other end of moving link projects support frame, equidistant fixed connection has a plurality of moving blocks on moving link, still fixedly connected with fixed link between support frame, fixedly connected with the fixed block that corresponds with moving block on fixed link, the lower end of fixed block and moving block is fixedly connected with first clamping jaw and second clamping jaw respectively. The utility model mainly solves the problem that the existing hoisting mode is high in labor cost and cannot guarantee hoisting safety.

Description

Technical Field

[0001] This utility model relates to the field of steel arch frame technology, specifically a hoisting device for steel arch frames. Background Technology

[0002] The steel arch frame is arched in shape and has an I-shaped cross-section. Due to its shape, the steel arch frame is difficult to stack and secure during transport. Therefore, steel bars are typically used to temporarily weld and secure several steel arch frames together before hoisting equipment is used for transport.

[0003] The following drawbacks exist when using steel bars to temporarily weld and fix several sections of steel arch frame: First, the welding operation requires workers to have welding skills, which increases the wages of welders and raises labor costs; second, the welding quality is difficult to control, posing a risk of the steel arch frame falling accidentally and reducing the safety of hoisting. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hoisting device for steel arch frames, which mainly solves the problems of high labor costs and inability to guarantee hoisting safety in existing hoisting methods.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hoisting device for steel arch frames, comprising two parallel bearing frames, with support frames symmetrically arranged at the lower end of the bearing frames, an electric push rod installed on one side of each support frame, a movable rod slidably connected between the support frames, the movable rod being movable along the length direction of the support frame, one end of the movable rod being connected to the push rod of the electric push rod, the other end of the movable rod extending out of the support frame, three movable blocks being fixedly connected at equal intervals on the movable rod, a fixed rod being fixedly connected between the support frames, a fixed block corresponding to the movable block being fixedly connected on the fixed rod, and a first gripper and a second gripper being fixedly connected to the lower end of the fixed block and the movable block, respectively.

[0006] With the above structural design, this device achieves automatic and rapid clamping and fixing of multiple steel arch frames through two parallel support frames, an electric push rod driving the moving rod, and a symmetrically distributed gripper structure. It eliminates the need for steel bar welding, avoids the risk of falling due to unstable welding quality, and ensures a stable and reliable hoisting process.

[0007] Preferably, a hydraulic rod is installed at the middle position of the upper end of the support frame, and the piston rods of the two hydraulic rods pass through the support frame and are fixedly connected to both ends of the pressure plate.

[0008] With the above structural design, the hydraulic rod drives the pressure plate to press down, which, together with the lateral clamping of the grippers, forms a multi-point constraint on the steel arch frame, effectively preventing shaking or falling off during the transfer process.

[0009] Preferably, the upper ends of the first gripper and the second gripper are provided with a second rubber pad that matches the curvature of the upper flange of the steel arch frame.

[0010] With the above structural design, the arc-shaped design of the rubber pad fits the flange contour of the I-shaped section, avoiding scratches or deformation caused by rigid contact and protecting the surface quality of the steel arch frame; at the same time, the rubber pad provides a larger coefficient of friction, preventing slippage caused by vibration during hoisting or transportation, and improving clamping reliability and stability.

[0011] Preferably, a first rubber pad is provided at the lower end of the pressure plate.

[0012] With the above structural design, the upper and lower rubber pads wrap around the steel arch frame from the top and sides respectively, forming a comprehensive protective layer to reduce damage caused by collision or squeezing during transportation; the elastic properties of the rubber pads can absorb the impact load during transportation, reduce structural stress, and ensure the stability of hoisting.

[0013] Preferably, lifting rings are symmetrically fixedly connected at both ends of the upper part of the support frame.

[0014] The above structural design, with symmetrically arranged lifting rings at both ends, ensures even force distribution during lifting, preventing tilting or swaying due to uneven loading and guaranteeing safety during high-altitude operations. It also facilitates quick connection with lifting equipment, improving lifting efficiency.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This device achieves automatic and rapid clamping and fixing of multiple steel arch frames through two parallel support frames, an electric push rod driving the moving rod, and a symmetrically distributed gripper structure. It eliminates the need for steel bar welding, avoiding the risk of falling due to unstable welding quality and ensuring a stable and reliable hoisting process. The hydraulic rod drives the pressure plate to press down, which, together with the lateral clamping of the grippers, forms multi-point constraints on the steel arch frames, effectively preventing shaking or falling off during transportation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the support frame of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a side view of the hydraulic rod and pressure plate of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 This utility model provides a hoisting device for steel arch frames, including two parallel bearing frames 1. Support frames 2 are symmetrically arranged at the lower ends of the bearing frames 1, and the bearing frames 1 and support frames 2 are arranged longitudinally and transversely. An electric push rod 5 is installed on one side of each support frame 2. A movable rod 6 is slidably connected between the support frames 2. The electric push rod 5 is fixed to the side wall of the support frame 2 by flange bolts, and the axis of the push rod is coaxial with the movable rod 6. The movable rod 6 can move along the length of the support frame 2. One end of the movable rod 6 is connected to the push rod of the electric push rod 5, and the other end of the movable rod 6 extends out of the support frame 2 and is fixedly connected to a limit plate 13. Several movable blocks 10 are fixedly connected at equal intervals on the movable rod 6. A fixed rod 7 is also fixedly connected between the support frames 2. A fixed block 9 corresponding to the movable block 10 is fixedly connected to the fixed rod 7. The lower ends of the fixed block 9 and the movable block 10 are respectively fixedly connected to a first clamping claw 11 and a second clamping claw 12 by bolts. The first jaw 11 and the second jaw 12 are L-shaped forgings.

[0019] A hydraulic rod 4 is installed at the upper middle position of the support frame 1. The base flange of the hydraulic rod 4 is fixed to the upper end face of the support frame 1, and the piston rod is vertically downward. The piston rods of the two hydraulic rods 4 pass through the support frame 1 and are fixedly connected to both ends of the pressure plate 3.

[0020] The upper ends of the first gripper 11 and the second gripper 12 are provided with a second rubber pad 8 that matches the curvature of the upper flange of the steel arch frame.

[0021] A first rubber pad 15 is provided at the lower end of the pressure plate 3. Both the first rubber pad 15 and the second rubber pad 8 are rubber cushioning pads.

[0022] The upper two ends of the support frame 1 are symmetrically fixed with lifting rings 14.

[0023] Working principle: The hoisting device is lifted to a position directly above the neatly stacked steel arch frame assembly. The position is adjusted so that the first clamp 11 and the second clamp 12 at each workstation are precisely aligned with the sides of the arch frame web, while the pressure plate 3 is directly above the center line of the top of the arch frame. The electric push rod 5 is activated, which pushes the moving rod 6 to slide horizontally along the length of the support frame 2. The moving rod 6 drives all the moving blocks 10 to move inward synchronously, while the fixed block 9 remains stationary, so that the second clamp 12 moves closer to the first clamp 11 until the arch frame web is completely clamped by the first clamp 11 and the second clamp 12. At this time, the second rubber pad 8 adaptively conforms to the curvature of the upper flange of the arch frame, increasing friction and protecting the surface. Then, the hydraulic rod 4 is activated, and the piston rod pushes the pressure plate 3 downward to move vertically. The pressure plate 3 presses the upper flange of the top of the arch frame assembly through the first rubber pad 15, forming a three-dimensional constraint system of "lateral clamping of the web and vertical clamping of the flange". The steel arch frame can then be hoisted by connecting the four symmetrically arranged lifting rings 14 to the crane hook.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hoisting device for steel arch frames, characterized in that: The device includes two parallel support frames (1), with a support frame (2) symmetrically arranged at the lower end of each support frame (1). An electric push rod (5) is installed on one side of each support frame (2). A movable rod (6) is slidably connected between the support frames (2). The movable rod (6) can move along the length of the support frame (2). One end of the movable rod (6) is connected to the push rod of the electric push rod (5), and the other end of the movable rod (6) extends out of the support frame (2). Several movable blocks (10) are fixedly connected at equal intervals on the movable rod (6). A fixed rod (7) is also fixedly connected between the support frames (2). A fixed block (9) corresponding to the movable block (10) is fixedly connected on the fixed rod (7). A first gripper (11) and a second gripper (12) are fixedly connected to the lower ends of the fixed block (9) and the movable block (10), respectively.

2. The hoisting device for steel arch frames according to claim 1, characterized in that: A hydraulic rod (4) is installed at the middle of the upper end of the support frame (1). The piston rods of the two hydraulic rods (4) pass through the support frame (1) and are fixedly connected to both ends of the pressure plate (3).

3. The hoisting device for steel arch frames according to claim 1, characterized in that: The upper ends of the first gripper (11) and the second gripper (12) are provided with a second rubber pad (8) that matches the curvature of the upper wing plate of the steel arch frame.

4. A hoisting device for steel arch frames according to claim 2, characterized in that: The lower end of the pressure plate (3) is provided with a first rubber pad (15).

5. A hoisting device for steel arch frames according to claim 1, characterized in that: The upper two ends of the support frame (1) are symmetrically fixed with lifting rings (14).

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