Anti-falling device for Lassen steel sheet pile hoisting

Abstract

The invention relates to the technical field of Larsen steel sheet piles, in particular to a Larsen steel sheet pile hoisting anti-falling device which comprises a hoisting connecting piece, limiting control pieces are fixedly connected to the left side and the right side of the front side of the hoisting connecting piece correspondingly, and limiting pieces are arranged at the tops and the bottoms of the front sides of the two limiting control pieces correspondingly; by arranging the hoisting connecting piece, the limiting control piece and the limiting piece, the all-dimensional stable limiting and anti-falling functions in the Larsen steel sheet pile hoisting process are achieved, through an ingeniously-designed mechanical linkage structure, after hoisting operation is started, all the components act in sequence, stable acting force is applied to the Larsen steel sheet pile in multiple directions, and the hoisting efficiency is improved. According to the anti-skid device for the Larsen steel sheet piles, the situation that the device shakes, shifts and even falls off in the hoisting process is ensured, the positions of the rubber anti-skid wheels are flexibly adjusted, the device can better adapt to the surface characteristics of the Larsen steel sheet piles of different specifications, the anti-skid and fixing effects are further enhanced, and the safety and reliability of Larsen steel sheet pile hoisting operation are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of Larssen sheet pile technology, and more specifically, to a device for preventing the falling off of Larssen sheet piles during hoisting. Background Technology

[0002] Larssen sheet piles are a specially designed sheet pile structure, typically with a U-shaped or Z-shaped cross-section. This unique design gives them excellent strength and stiffness, enabling them to withstand large external loads. In building construction, bridge construction, port terminals, and other infrastructure projects, Larssen sheet piles are widely used in retaining walls, cofferdams, and foundation pit support, playing a vital supporting and protective role. However, during the actual hoisting operation of Larssen sheet piles, due to their irregular shape and large individual weight, slippage, tilting, and even falling are prone to occur. Such accidents can not only damage equipment but also seriously threaten the lives of on-site personnel. Therefore, to effectively prevent such risks, a specially designed hoisting anti-fall device must be used. This device can firmly lock the sheet piles, preventing them from shifting or falling during hoisting, thereby significantly improving the safety and reliability of the construction process.

[0003] According to patent document CN115404865B, a guiding device for Larssen sheet pile support is disclosed, which includes a frame and a first limiting structure disposed on the frame. The first limiting structure includes a first clamping assembly, which includes a first clamping plate and a second clamping plate that can move on the frame. A gap is provided between the first clamping plate and the second clamping plate for the Larssen sheet pile to pass through. The first limiting structure also includes an adjusting assembly for adjusting the size of the gap between the first clamping plate and the second clamping plate. This application has the effect of reducing the deviation phenomenon when Larssen sheet piles are driven into the ground, limiting the position of Larssen sheet piles, and guiding the driving direction of Larssen sheet piles.

[0004] Larssen sheet piles, as a common foundation pit support structure, are widely used in temporary support projects during the excavation of various building foundation pits. However, in the actual construction process of Larssen sheet piles, vibratory hammer equipment is usually required. The sheet piles are lifted into the air by the clamping force provided by the hydraulic clamps before being driven in. During this process, problems such as loose clamping, unstable oil pressure, or mechanical wear of the hydraulic clamps of the vibratory hammer can easily lead to insufficient clamping force, which can cause the Larssen sheet piles to fall off unexpectedly during hoisting or vibratory driving. Such situations not only affect the construction progress but also pose serious safety hazards, threatening on-site workers and equipment. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a device for preventing Larssen sheet piles from falling off during hoisting. The technical problem to be solved by the present invention is that the hydraulic clamp of the vibratory hammer may have problems such as loose clamping, unstable oil pressure or mechanical wear, which can easily lead to insufficient clamping force, thereby causing Larssen sheet piles to fall off unexpectedly during hoisting or vibratory driving. Such situations not only affect the construction progress, but also bring serious safety hazards and pose a threat to on-site workers and equipment.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A device for preventing the falling off of Larssen sheet piles during hoisting includes a hoisting connector, wherein limit control components are fixedly connected to both the left and right sides of the front side of the hoisting connector, and limit components are provided at the top and bottom of the front side of the two limit control components. The hoisting connector includes a hoisting connecting plate, a hoisting connection port is fixedly connected to the top of the hoisting connecting plate, an electric push rod is fixedly connected to the middle of the bottom of the hoisting connecting plate, a push-pull plate is fixedly connected to the rear end of the electric push rod, and columnar push-pull blocks are fixedly connected to the left and right sides of the front side of the push-pull plate. Both of the aforementioned limit control components include L-shaped side plates. Guide rods are fixedly connected to the top and bottom of the outer sides of the two L-shaped side plates. The inner sides of the two L-shaped side plates are fixedly connected to the left and right sides of the hoisting connection plate. Guide uprights are fixedly connected to the front sides of the two L-shaped side plates. Each of the plurality of limiting components includes a C-shaped connecting housing, and a limiting component hinge plate is fixedly connected to the outer side of each of the plurality of C-shaped connecting housings. A sliding groove is provided on the front side of each of the plurality of C-shaped connecting housings.

[0007] As a further embodiment of the present invention: C-shaped sliders are slidably connected to the outer walls of both sets of guide rods; push-pull blocks are fixedly connected to the middle of the outer sides of both C-shaped sliders; second columnar push-pull blocks are fixedly connected to the front sides of both push-pull blocks; convex push-pull plates are fixedly connected to the front ends of both second columnar push-pull blocks; elliptical abutment plates are fixedly connected to the rear sides of both convex push-pull plates; rotating rods are rotatably connected to both sides of the middle of the outer sides of both L-shaped side plates; rotating rod abutments are fixedly connected to the rear sides of the outer sides of both sets of rotating rods; and the outer walls of both sets of rotating rod abutments are slidably connected to the inner walls of the two elliptical abutment plates.

[0008] As a further embodiment of the present invention: connecting blocks are rotatably connected to both sides of the front side of the outer middle of the two L-shaped side plates; connecting blocks are fixedly connected to the middle of the outer side of the two guide uprights; columnar connecting rods are fixedly connected to the inner walls of the two connecting blocks; C-shaped abutments are fixedly connected to the front ends of the two columnar connecting rods; the front sides of the left and right sets of rotating rods and the left and right sets of connecting blocks are rotatably connected to the rear side of the multiple limiting member hinge plates; and the middle of the rear side of the two push-pull blocks is fixedly connected to the front ends of the two columnar push-pull blocks.

[0009] As a further embodiment of the present invention: L-shaped push-pull uprights are slidably connected to the inner walls of the plurality of sliding grooves, and abutments are fixedly connected to the outer sides of the plurality of L-shaped push-pull uprights. The side of the plurality of L-shaped push-pull uprights away from the abutments extends to the outer wall of the C-shaped connecting housing through a sliding groove opened in the C-shaped connecting housing. The rear sides of the plurality of C-shaped connecting housings are slidably connected to the front sides of the two guide uprights. The outer sides of the left and right sets of L-shaped push-pull uprights are aligned with the inner sides of the two C-shaped abutments. Limiting components are fixedly connected to the inner sides of the left and right sets of C-shaped connecting housings. Positioning components are fixedly connected to the inner sides of the top and bottom sets of limiting components.

[0010] As a further aspect of the present invention: each of the plurality of limiting components includes two Z-shaped plates, and rectangular connecting rods are fixedly connected to the top and bottom of the outer sides of the plurality of Z-shaped plates. Inverted L-shaped hinge blocks are fixedly connected to the outer sides of the plurality of Z-shaped plates that are close to each other. V-shaped rotating arms are rotatably connected to the inner sides of the plurality of inverted L-shaped hinge blocks. Limiting clamps are fixedly connected to one side of the plurality of V-shaped rotating arms. Rotary wheels are rotatably connected to the inner sides of the plurality of V-shaped rotating arms. Springs are fixedly connected to the inner sides of the plurality of V-shaped rotating arms. The inner sides of the plurality of rotating wheels are all in contact with the outer walls of the plurality of abutment plates.

[0011] As a further embodiment of the present invention: Each of the multiple sets of rectangular connecting rods is fixedly connected to an inner connecting side plate on the side away from the Z-shaped plate; each of the multiple sets of inner connecting side plates is fixedly connected to a hinged side plate on its inner side; each of the multiple sets of hinged side plates is fixedly connected to a columnar crossbar on its inner wall; each of the multiple sets of hinged side plates is rotatably connected to a rotating arm at its top and bottom; each of the multiple sets of columnar crossbars is rotatably connected to a circular turntable on both sides of its outer wall; each of the multiple sets of circular turntables is rotatably connected to a swing rod on its outer wall; each of the multiple sets of swing rods is rotatably connected to the inner wall of multiple top rotating arms on its outer wall; each of the multiple sets of rotating arms is fixedly connected to a side connecting upright on its outer wall; each of the multiple sets of rotating arms is rotatably connected to a lifting plate on its side away from the hinged side plate; and the inner wall of each of the multiple sets of lifting plates is fixedly connected to the outer wall of multiple L-shaped push-pull uprights.

[0012] As a further aspect of the present invention: Z-shaped lifting side plates are slidably connected to the inner sides of the multiple sets of Z-shaped plates, one side of each set of Z-shaped lifting side plates is fixedly connected to one side of the multiple sets of lifting plates, and retraction and expansion control rods are rotatably connected to the inner sides of each set of Z-shaped lifting side plates.

[0013] As a further aspect of the present invention: each of the multiple positioning components includes a rectangular upright plate, the outer sides of the multiple rectangular upright plates are fixedly connected to the inner sides of multiple sets of Z-shaped plates, a rectangular upright plate groove is opened on the top of one side of each of the multiple rectangular upright plates, and L-shaped expansion and contraction plate sliders are slidably connected to both sides of the inner wall of the rectangular upright plate groove opened on the multiple rectangular upright plates.

[0014] As a further embodiment of the present invention: an L-shaped expanding plate is fixedly connected to one side of each of the multiple sets of L-shaped expanding plate sliders, and an L-shaped expanding plate hinge plate is fixedly connected to the outer side of each of the multiple sets of L-shaped expanding plate sliders.

[0015] As a further embodiment of the present invention: the inner walls of the multiple sets of L-shaped expansion and contraction plates are rotatably connected to the outer wall of the multiple sets of expansion and contraction control rods on the side away from the Z-shaped lifting side plate, and rubber anti-slip wheels are rotatably connected to the inner sides of the multiple sets of L-shaped expansion and contraction plates.

[0016] The beneficial effects of this invention are as follows: This invention, by incorporating lifting connectors, limit control components, and limiters, achieves comprehensive stabilization and anti-fall-off functions during the lifting of Larssen sheet piles. Through a cleverly designed mechanical linkage structure, after the lifting operation begins, each component moves sequentially and orderly, applying stabilizing forces to the Larssen sheet piles from multiple directions, ensuring that they will not shake, shift, or even fall off during the lifting process. Simultaneously, the flexible adjustment of the rubber anti-slip wheel position better adapts to the surface characteristics of Larssen sheet piles of different specifications, further enhancing the anti-slip and fixing effects. This significantly improves the safety and reliability of Larssen sheet pile lifting operations, effectively avoiding serious accidents such as personnel injuries and equipment damage that may be caused by lifting detachment, and providing a solid safety guarantee for related engineering construction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional separation structure of the main body of the present invention; Figure 3 This is a schematic diagram of the three-dimensional separation structure of the hoisting connector of the present invention; Figure 4 This is a three-dimensional structural diagram of the limiting control component and the limiting component of the present invention; Figure 5 This is a three-dimensional structural diagram of the limiting control component of the present invention; Figure 6 This is a three-dimensional structural diagram of the limiting component of the present invention; Figure 7 This is a schematic diagram of the three-dimensional separation structure of a single limiting member according to the present invention; Figure 8 This is a schematic diagram of the three-dimensional separation structure of a single limiting component and a positioning component of the present invention; Figure 9 This is a schematic diagram of the three-dimensional separation structure of a single limiting component of the present invention; Figure 10 This is a schematic diagram of the three-dimensional separation structure of a single positioning component according to the present invention.

[0018] In the diagram: 1. Lifting connector; 11. Lifting connecting plate; 12. Lifting connection port; 13. Electric push rod; 14. Push-pull plate; 15. Columnar push-pull block; 2. Limit control component; 21. L-shaped side plate; 22. Guide rod; 23. Guide upright plate; 24. C-shaped slider; 25. Push-pull block; 26. Rotating rod; 27. Second columnar push-pull block; 28. Rotating rod abutment block; 29. ​​Convex push-pull plate; 210. Elliptical abutment plate; 211. Second rotating rod; 212. Connecting block; 213. Columnar connecting rod; 214. C-shaped abutment plate; 3. Limiting component; 31. C-shaped connecting shell; 32. Limiting component hinge plate; 33. Slide groove; 34. Abutment plate; 35. L-shaped push-pull upright; 36. Limiting component Components; 361, Z-shaped plate; 362, inverted L-shaped hinged block; 363, rectangular connecting rod; 364, inner connecting side plate; 365, hinged side plate; 366, columnar crossbar; 367, circular turntable; 368, swing rod; 369, rotating arm; 3610, side connecting upright; 3611, lifting plate; 3612, Z-shaped lifting side plate; 3613, retraction and expansion control rotating rod; 3614, limit clamp; 3615, V-shaped rotating arm; 3616, rotating wheel; 3617, spring; 37, positioning component; 371, rectangular upright plate; 372, rectangular upright plate slide groove; 373, L-shaped retraction and expansion plate; 374, L-shaped retraction and expansion plate hinge plate; 375, L-shaped retraction and expansion plate slider; 376, rubber anti-slip wheel. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1-2As shown, the present invention provides a device for preventing the falling off of Larssen steel sheet piles during hoisting, including a hoisting connector 1, with limit control components 2 fixedly connected to both the left and right sides of the front side of the hoisting connector 1, and limit components 3 provided at the top and bottom of the front side of the two limit control components 2.

[0021] like Figure 3-7 As shown, the hoisting connector 1 includes a hoisting connector plate 11. A hoisting connector port 12 is fixedly connected to the top of the hoisting connector plate 11. An electric push rod 13 is fixedly connected to the middle of the bottom of the hoisting connector plate 11. A push-pull plate 14 is fixedly connected to the rear end of the electric push rod 13. Columnar push-pull blocks 15 are fixedly connected to the left and right sides of the front of the push-pull plate 14. Both limit control components 2 include L-shaped side plates 21. Guide rods 22 are fixedly connected to the top and bottom of the outer sides of the two L-shaped side plates 21. The inner sides of the two L-shaped side plates 21 are fixedly connected to the left and right sides of the hoisting connector plate 11. Guide uprights 23 are fixedly connected to the front of the two L-shaped side plates 21. C-shaped sliders 24 are slidably connected to the outer walls of the left and right guide rods 22. Push-pull blocks 25 are fixedly connected to the middle of the outer sides of the two C-shaped sliders 24. Second columnar push-pull blocks 27 are fixedly connected to the front of the two push-pull blocks 25. The front ends of the two second columnar push-pull blocks 27 are fixedly connected to... The two convex push-pull plates 29 are each fixedly connected to an elliptical abutment plate 210 on their rear sides. Rotating rods 26 are rotatably connected to both sides of the outer middle of the two L-shaped side plates 21. Rotating rod blocks 28 are fixedly connected to the rear sides of the outer sides of the two sets of rotating rods 26. The outer walls of the two sets of rotating rod blocks 28 are slidably connected to the inner walls of the two elliptical abutment plates 210. Second rotating rods 211 are rotatably connected to both sides of the front side of the outer middle of the two L-shaped side plates 21. Two guide plates 23 are fixedly connected to the middle of their outer sides with connecting blocks 212. Two connecting blocks 212 are fixedly connected to the inner walls of their inner walls with columnar connecting rods 213. Two columnar connecting rods 213 are fixedly connected to the front ends of their front ends with C-shaped abutments 214. The front ends of the two sets of left and right rotating rods 26 and the two sets of left and right second rotating rods 211 are rotatably connected to the rear ends of multiple limiting member hinge plates 32. The middle of the rear ends of the two push-pull blocks 25 are fixedly connected to the front ends of the two columnar push-pull blocks 15. When hoisting Larssen sheet piles, first connect the hoisting equipment through the hoisting connection port 12, and control the main body of the device so that the Larssen sheet pile is inside the limit control parts 2 and 3 on both sides. Then, start the electric push rod 13 to pull the push-pull plate 14 forward. The forward movement of the push-pull plate 14 drives the columnar push-pull block 15 to move synchronously. The columnar push-pull block 15 pushes the push-pull block 25 forward, thereby causing the C-shaped slider 24 to slide along the guide rod 22. As the C-shaped slider 24 moves... The second columnar push-pull block 27 drives the convex push-pull plate 29 to move forward, and the elliptical abutment plate 210 also moves forward, pushing the rotating rod abutment block 28 to slide in the elliptical abutment plate 210, so that the rotating rod 26 rotates around the rotating connection point with the L-shaped side plate 21. The rotation of the rotating rod 26 drives the second rotating rod 211 to rotate, which in turn causes the limiting member hinge plate 32 to rotate. Multiple limiting members 3 cooperate with each other to limit and fix the Larssen steel sheet pile from multiple directions to prevent it from falling off during hoisting.

[0022] like Figure 8-10As shown, each of the multiple limiting components 3 includes a C-shaped connecting housing 31. A limiting component hinge plate 32 is fixedly connected to the outer side of each of the multiple C-shaped connecting housings 31. A sliding groove 33 is provided on the front side of each of the multiple C-shaped connecting housings 31. An L-shaped push-pull rod 35 is slidably connected to the inner wall of each of the multiple sliding grooves 33. A stop plate 34 is fixedly connected to the outer side of each of the multiple L-shaped push-pull rods 35. The side of each L-shaped push-pull rod 35 away from the stop plate 34 extends through the sliding groove 33 of the C-shaped connecting housing 31 to the outer wall of the C-shaped connecting housing 31. The rear side of each of the multiple C-shaped connecting housings 31 is slidably connected to the front side of two guide plates 23. The outer sides of the left and right sets of L-shaped push-pull rods 35 are aligned with the inner sides of the two C-shaped stop plates 214. The left and right sets of C-shaped connecting housings 31... Each of the following components is fixedly connected to the inner side of a 1-shaped plate: a limiting component 36; positioning components 37 are fixedly connected to the inner sides of the top and bottom sets of limiting components 36; each of the multiple limiting components 36 includes two Z-shaped plates 361; rectangular connecting rods 363 are fixedly connected to the top and bottom of the outer sides of the multiple sets of Z-shaped plates 361; inverted L-shaped hinge blocks 362 are fixedly connected to the outer sides of the multiple sets of Z-shaped plates 361 that are close to each other; V-shaped rotating arms 3615 are rotatably connected to the inner sides of the multiple sets of inverted L-shaped hinge blocks 362; limiting clamps 3614 are fixedly connected to one side of the multiple sets of V-shaped rotating arms 3615; rotating wheels 3616 are rotatably connected to the inner sides of the multiple sets of V-shaped rotating arms 3615; and springs 3617 are fixedly connected to the inner sides of the multiple sets of V-shaped rotating arms 3615. The inner sides of 16 are all in contact with the outer walls of multiple abutment plates 34. Multiple sets of rectangular connecting rods 363 are fixedly connected to inner connecting side plates 364 on the side away from the Z-shaped plate 361. Multiple sets of inner connecting side plates 364 are fixedly connected to hinged side plates 365 on their inner sides. Multiple sets of hinged side plates 365 are fixedly connected to columnar crossbars 366 on their inner walls. Multiple sets of hinged side plates 365 are rotatably connected to the top and bottom of their inner sides with rotating arms 369. Multiple sets of columnar crossbars 366 are rotatably connected to both sides of their outer walls with circular turntables 367. Multiple sets of circular turntables 367 are rotatably connected to their outer walls with swing rods 368. Multiple sets of swing rods 368 are rotatably connected to the inner walls of multiple top rotating arms 369 on their outer walls away from the circular turntables 367. Multiple sets of rotating arms 369 are fixedly connected to... The system includes a side-connecting upright 3610, multiple sets of rotating arms 369, each with a lifting plate 3611 rotatably connected to the side away from the hinged side plate 365. The inner walls of the multiple lifting plates 3611 are fixedly connected to the outer walls of multiple L-shaped push-pull uprights 35. The inner sides of multiple Z-shaped plates 361 are slidably connected to Z-shaped lifting side plates 3612. One side of each Z-shaped lifting side plate 3612 is fixedly connected to one side of each lifting plate 3611. The inner sides of each Z-shaped lifting side plate 3612 are rotatably connected to a retraction / expansion control rod 3613. Multiple positioning components 37 each include a rectangular upright plate 371. The outer sides of each rectangular upright plate 371 are fixedly connected to the inner sides of each Z-shaped plate 361. A rectangular upright plate groove 372 is provided on the top of one side of each rectangular upright plate 371.Multiple rectangular vertical plates 371 have L-shaped retractable sliding plate sliders 375 slidably connected to both sides of the inner wall of the rectangular vertical plate grooves 372. Each set of L-shaped retractable sliding plate sliders 375 has an L-shaped retractable plate 373 fixedly connected to one side. Each set of L-shaped retractable sliding plate 373 has an L-shaped retractable sliding plate hinge plate 374 fixedly connected to the outer wall of the L-shaped retractable control levers 3613 away from the Z-shaped lifting side plate 3612. Multiple sides of the inner side of the L-shaped retractable sliding plate 373 are rotatably connected to rubber anti-slip wheels 376. During the process of multiple limiting components 3 moving inward under the control of limiting control component 2, the two sets of L-shaped push-pull uprights 35 are pushed by two C-shaped abutment plates 214. After being pushed by the two C-shaped abutment plates 214, the two sets of L-shaped push-pull uprights 35 will slide inward along the sliding groove 33 opened on the front side of the C-shaped connecting housing 31. As the L-shaped push-pull uprights 35 move, the abutment plate 34 fixedly connected to them will also move inward synchronously, thereby pushing the rotating wheel 3616 to rotate. The rotation of the rotating wheel 3616 will drive the V-shaped rotating arm 3615 to rotate around the inverted L-shaped hinged upright block 362, so that the limiting clamp 3614 gradually approaches and finally clamps the Larssen steel sheet pile, and provides stable limiting and fixing from multiple directions. Simultaneously, the movement of the L-shaped push-pull upright 35 will also drive the lifting plate 3611 to move up and down, thereby causing the Z-shaped lifting side plate 3612 to slide inside the Z-shaped plate 361. The sliding of the Z-shaped lifting side plate 3612 will cause the retraction and expansion control rod 3613 to rotate, thereby driving the L-shaped retraction and expansion plate 373 to slide in the rectangular upright plate slide groove 372 through the L-shaped retraction and expansion plate slider 375. The movement of the L-shaped retraction and expansion plate 373 will adjust the position of the rubber anti-slip wheel 376 connected to its inner side, so that it can better fit the surface of the Larssen steel sheet pile, further enhancing the effect of limiting and fixing, preventing the Larssen steel sheet pile from falling off or shaking during the hoisting process, and ensuring the safety and stability of the hoisting operation. In addition, during the lowering of Larssen sheet piles, as the Larssen sheet piles are gradually lowered to the predetermined position, the rubber anti-slip wheel 376 in the positioning component 37 maintains a tight fit with the surface of the sheet pile. It absorbs the minor impact force during the lowering process through elastic deformation, avoiding the risk of slippage caused by rigid contact. At this time, the rectangular vertical plate 371, through the sliding pair formed by the L-shaped expansion plate slider 375 and the L-shaped expansion plate 373, enables the rubber anti-slip wheel 376 to automatically adjust the contact angle according to the curvature of the sheet pile surface. Combined with the three-dimensional clamping force field formed by the limiting clamp 3614, a dynamically balanced limiting system is constructed.

[0023] Working principle of this invention: When hoisting Larssen sheet piles, the hoisting equipment is first connected through the hoisting connection port 12, and the main body of the device is controlled so that the Larssen sheet pile is inside the limiting control parts 2 and 3 on both sides. Then, the electric push rod 13 is activated to pull the push-pull plate 14 forward. The forward movement of the push-pull plate 14 drives the columnar push-pull block 15 to move synchronously. The columnar push-pull block 15 pushes the push-pull block 25 forward, thereby causing the C-shaped slider 24 to slide along the guide rod 22. As the C-shaped slider 24 moves, the second columnar push-pull block 24 moves forward. Pull block 27 moves the convex push-pull plate 29 forward, and the elliptical abutment plate 210 also moves forward, pushing the rotating rod abutment block 28 to slide within the elliptical abutment plate 210. This causes the rotating rod 26 to rotate around the rotation connection point with the L-shaped side plate 21. The rotation of the rotating rod 26 drives the second rotating rod 211 to rotate, thereby causing the limiting member hinge plate 32 to slide inward. During the process of multiple limiting members 3 moving inward under the control of the limiting control member 2, the two sets of L-shaped push-pull uprights 35 are abutted by the two C-shaped abutment plates 214. After being pushed by the two C-shaped abutments 214, the pull rod 35 slides inward along the groove 33 on the front side of the C-shaped connecting housing 31. As the L-shaped push-pull rod 35 moves, the abutment 34 fixedly connected to it also moves inward synchronously, thereby pushing the rotating wheel 3616 to rotate. The rotation of the rotating wheel 3616 will drive the V-shaped rotating arm 3615 to rotate around the inverted L-shaped hinged block 362, so that the limiting clamp 3614 gradually approaches and finally clamps the Larssen steel sheet pile, providing stable limiting and fixation from multiple directions. At the same time, the movement of the L-shaped push-pull pole 35 will also drive the lifting plate 3611 to move up and down, which in turn will drive the Z-shaped lifting side plate 3612 to slide inside the Z-shaped plate 361. The sliding of the Z-shaped lifting side plate 3612 will cause the retraction and expansion control rod 3613 to rotate, thereby driving the L-shaped retraction and expansion plate 373 to slide in the rectangular upright plate slide groove 372 through the L-shaped retraction and expansion plate slider 375. The movement of the L-shaped retraction and expansion plate 373 will adjust the position of the rubber anti-slip wheel 376 connected to its inner side, so that it can better fit the surface of the Larssen steel sheet pile.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing the falling off of Larssen sheet piles during hoisting, comprising a hoisting connector (1), characterized in that: Limit control components (2) are fixedly connected to the left and right sides of the front side of the hoisting connector (1), and limit components (3) are provided at the top and bottom of the front side of the two limit control components (2). The hoisting connector (1) includes a hoisting connector plate (11), a hoisting connector port (12) is fixedly connected to the top of the hoisting connector plate (11), an electric push rod (13) is fixedly connected to the middle of the bottom of the hoisting connector plate (11), a push-pull plate (14) is fixedly connected to the rear end of the electric push rod (13), and columnar push-pull blocks (15) are fixedly connected to the left and right sides of the front side of the push-pull plate (14). Both of the limiting control components (2) include L-shaped side plates (21). Guide rods (22) are fixedly connected to the top and bottom of the outer side of the two L-shaped side plates (21). The inner sides of the two L-shaped side plates (21) are fixedly connected to the left and right sides of the hoisting connection plate (11). Guide uprights (23) are fixedly connected to the front side of the two L-shaped side plates (21). Each of the limiting members (3) includes a C-shaped connecting housing (31), and a limiting member hinge plate (32) is fixedly connected to the outer side of each of the C-shaped connecting housings (31). A sliding groove (33) is provided on the front side of each of the C-shaped connecting housings (31).

2. The anti-fall-off device for Larssen sheet pile hoisting according to claim 1, characterized in that: Both sets of guide rods (22) are slidably connected to C-shaped sliders (24) on their outer walls. Push-pull blocks (25) are fixedly connected to the middle of the outer sides of the two C-shaped sliders (24). Second columnar push-pull blocks (27) are fixedly connected to the front sides of the two push-pull blocks (25). Convex push-pull plates (29) are fixedly connected to the front ends of the two second columnar push-pull blocks (27). Elliptical abutment plates (210) are fixedly connected to the rear sides of the two convex push-pull plates (29). Rotating rods (26) are rotatably connected to the two sides of the middle of the outer sides of the two L-shaped side plates (21). Rotating rod abutments (28) are fixedly connected to the rear sides of the outer sides of the two sets of rotating rods (26). The outer walls of the two sets of rotating rod abutments (28) are slidably connected to the inner walls of the two elliptical abutment plates (210).

3. A device for preventing the falling off of Larssen sheet piles during hoisting, as described in claim 2, is characterized in that: The two L-shaped side plates (21) are rotatably connected to the two sides of the front side of the middle outer side. The two guide plates (23) are fixedly connected to the middle outer side of the two guide plates (23). The inner walls of the two connecting blocks (212) are fixedly connected to the columnar connecting rods (213). The front ends of the two columnar connecting rods (213) are fixedly connected to the C-shaped abutment plates (214). The front sides of the two sets of rotating rods (26) and the two sets of second rotating rods (211) are rotatably connected to the rear side of the multiple limiting member hinge plates (32). The middle of the rear side of the two push-pull blocks (25) are fixedly connected to the front ends of the two columnar push-pull blocks (15).

4. The anti-fall-off device for Larssen sheet pile hoisting according to claim 1, characterized in that: The inner walls of the multiple sliding grooves (33) are slidably connected with L-shaped push-pull rods (35), and the outer sides of the multiple L-shaped push-pull rods (35) are fixedly connected with abutments (34). The side of the multiple L-shaped push-pull rods (35) away from the abutments (34) extends to the outer wall of the C-shaped connecting housing (31) through the sliding grooves (33) opened in the C-shaped connecting housing (31). The rear side of the multiple C-shaped connecting housings (31) is slidably connected to the front side of the two guide plates (23). The outer sides of the left and right sets of L-shaped push-pull rods (35) are aligned with the inner sides of the two C-shaped abutments (214). The inner sides of the left and right sets of C-shaped connecting housings (31) are fixedly connected with limit components (36), and the inner sides of the top and bottom sets of limit components (36) are fixedly connected with positioning components (37).

5. A device for preventing the falling off of Larssen sheet piles during hoisting, as described in claim 4, is characterized in that: Each of the multiple limiting components (36) includes two Z-shaped plates (361). Rectangular connecting rods (363) are fixedly connected to the top and bottom of the outer sides of the multiple sets of Z-shaped plates (361). Inverted L-shaped hinge blocks (362) are fixedly connected to the outer sides of the multiple sets of Z-shaped plates (361) on the side that is close to each other. V-shaped rotating arms (3615) are rotatably connected to the inner side of the multiple sets of inverted L-shaped hinge blocks (362). Limiting clamps (3614) are fixedly connected to one side of the multiple sets of V-shaped rotating arms (3615). Rotating wheels (3616) are rotatably connected to the inner side of the multiple sets of V-shaped rotating arms (3615). Springs (3617) are fixedly connected to the inner side of the multiple sets of V-shaped rotating arms (3615). The inner side of the multiple sets of rotating wheels (3616) is in contact with the outer wall of the multiple abutment plates (34).

6. A device for preventing the falling off of Larssen sheet piles during hoisting, as described in claim 5, is characterized in that: Each of the multiple sets of rectangular connecting rods (363) has an inner connecting side plate (364) fixedly connected to the side away from the Z-shaped plate (361). Each of the multiple sets of inner connecting side plates (364) has a hinged side plate (365) fixedly connected to its inner side. Each of the multiple sets of hinged side plates (365) has a columnar crossbar (366) fixedly connected to its inner wall. Each of the multiple sets of hinged side plates (365) has a rotating arm (369) rotatably connected to its top and bottom. Each of the multiple sets of columnar crossbars (366) has a circular turntable (367) rotatably connected to both sides of its outer wall. The outer wall of the turntable (367) is rotatably connected to a swing rod (368). The outer wall of the multiple sets of swing rods (368) away from the round turntable (367) is rotatably connected to the inner wall of multiple top rotating arms (369). The outer wall of the multiple sets of rotating arms (369) is fixedly connected to a side connecting rod (3610). The side of the multiple sets of rotating arms (369) away from the hinged side plate (365) is rotatably connected to a lifting plate (3611). The inner wall of the multiple sets of lifting plates (3611) is fixedly connected to the outer wall of multiple L-shaped push-pull rods (35).

7. A device for preventing the falling off of Larssen sheet piles during hoisting, as described in claim 6, is characterized in that: The inner sides of the multiple sets of Z-shaped plates (361) are slidably connected with Z-shaped lifting side plates (3612), one side of the multiple sets of Z-shaped lifting side plates (3612) is fixedly connected to one side of the multiple sets of lifting plates (3611), and the inner sides of the multiple sets of Z-shaped lifting side plates (3612) are rotatably connected with retraction and expansion control rods (3613).

8. A device for preventing the falling off of Larssen sheet piles during hoisting, as described in claim 4, is characterized in that: Each of the positioning components (37) includes a rectangular upright plate (371). The outer sides of the rectangular upright plates (371) are fixedly connected to the inner sides of multiple Z-shaped plates (361). A rectangular upright plate groove (372) is provided on the top of one side of each of the rectangular upright plates (371). L-shaped expansion and contraction plate sliders (375) are slidably connected to both sides of the inner wall of the rectangular upright plate groove (372) provided by the rectangular upright plates (371).

9. A device for preventing the falling off of Larssen sheet piles during hoisting, as described in claim 8, characterized in that: One side of each of the multiple sets of L-shaped expansion plate sliders (375) is fixedly connected to an L-shaped expansion plate (373), and the outer side of each of the multiple sets of L-shaped expansion plates (373) is fixedly connected to an L-shaped expansion plate hinge plate (374).

10. A device for preventing the falling off of Larssen sheet piles during hoisting, as described in claim 9, characterized in that: The inner walls of the multiple sets of L-shaped expansion and contraction plates (374) are rotatably connected to the outer wall of the multiple sets of expansion and contraction control rods (3613) away from the Z-shaped lifting side plate (3612). Rubber anti-slip wheels (376) are rotatably connected to the inner sides of the multiple sets of L-shaped expansion and contraction plates (373).

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