A trencher grab retrieval device

Abstract

The application discloses a kind of slotting machine grab fishing device, including fishing main rod assembly, ground load counterforce frame, jacking beam and hydraulic jacking system, fishing main rod assembly is a integral vertical main rod, main rod body is linearly and uniformly arranged with horizontal wing plate and support rib plate, and multiple jacking beam sockets are provided on the length direction of the rod body, ground load counterforce frame is laid on the top of foundation pit guide wall, including roadbed steel plate, load counterforce box and pad box, jacking beam can be transversely clamped into the jacking beam socket;Hydraulic jacking system includes jack and its base, fixedly installed on the top of pad box, piston rod extends upward and is in thrusting cooperation with jacking beam.The application cooperates with fishing main rod and jacking beam, jack and ground crane, realizes step-by-step jacking fishing, combines the lifting force of crane and the mechanical thrust of jack, effectively disperses counterforce, safely and smoothly fishes the grab stuck in deep slot stage by stage, significantly improves fishing efficiency and safety.

Description

Technical Field

[0001] This invention relates to the field of underground continuous wall construction equipment technology, and in particular to a novel salvage device for retrieving the grab bucket of a trenching machine buried in a section of the underground continuous wall. Background Technology

[0002] During the construction of diaphragm walls, the grab bucket of the trenching machine may fall and become stuck in the trench section due to collisions with hard soil layers and boulders, soil collapse, or even the machine's instability and overturning. Because diaphragm walls can be tens of meters deep and the trench openings are narrow, traditional salvage methods usually rely on cranes to directly and forcibly lift the wall upwards.

[0003] However, crane lifting is often limited by the length of the wire rope and the lifting capacity, and it is difficult to accurately and smoothly transfer the huge pulling force to the stuck grab bucket body, which can easily cause secondary accidents or break the wire rope. At the same time, the huge reaction force when forcibly lifted has nowhere to be released, which can easily damage the ground guide wall and the surrounding foundation.

[0004] Existing related patent technologies include a bucket salvage device and method disclosed in patent document (CN109518746A). This patent uses a "wire rope clamp (U-shaped double-ended bolt)" or "binding fixation" method to connect the salvage steel bar / wire rope to the main body of the lifting plate. When the bucket is severely jammed, the salvage wire rope is subjected to huge, even impact-like, non-uniform tensile force. U-shaped bolts and binding methods cannot guarantee uniform force distribution, and stress concentration is easily generated at the edges of the jamming or holes, leading to local wear, deformation, slippage, or even sudden breakage of the wire rope. This patent only mentions "hooking the bucket to be salvaged with a salvage hook set at one end of the salvage wire rope." In actual deep trenches, jammed buckets often tilt or twist. Single-point or simple hook-and-hook connections cannot achieve "accurate and stable" force transmission. Once the force is eccentric, the salvage hook can easily detach, causing the bucket to fall again and causing secondary accidents that damage the trench wall or equipment. The patent requires "two lifting devices to lift synchronously." However, in actual engineering, the bucket jamming is often asymmetrical (e.g., one side is jammed while the other side is loose). Forced synchronous lifting will cause the lifting platform to twist under stress, which may result in jamming and inability to continue lifting, or even structural bending damage to the lifting beam or support plate.

[0005] Therefore, there is an urgent need for a specialized device that can combine crane-assisted lifting with intermittent hydraulic jacking to achieve large-tonnage, controllable step-by-step salvage. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a novel grab bucket salvage device for trenching machines. By rationally setting the main lifting rod for salvage, the ground bearing reaction frame, the hydraulic lifting system, and the step-by-step lifting method in conjunction with the crane, the lifting force of the crane and the huge thrust of the jack are combined to safely and steadily salvage the grab bucket of the trenching machine stuck in the deep trench step by step.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] A grab bucket salvage device for a trenching machine includes a ground-based crane, a ground-based load-bearing reaction frame, a salvage main rod assembly, a lifting crossbeam, and a hydraulic lifting system. The ground load-bearing reaction frame is laid above the guide wall of the foundation pit and includes a roadbed steel plate as the bottom foundation. A load-bearing reaction box is provided above the roadbed steel plate. A pad box for dispersing the reaction force of the jack is provided on the top of the load-bearing reaction box. The salvage main rod assembly is a single, continuous vertical main rod. Horizontal wing plates extending outwards are linearly and evenly distributed along the main rod. Support ribs are provided between the horizontal wing plates and the main rod. Multiple lifting beam slots are evenly distributed along the length of the main rod. Hooks for hooking the grab bucket of the trenching machine can be welded to the bottom of the main rod. The lifting beam is mounted on the center of the main pole assembly and is horizontally and flush with the insertion slot of the lifting beam. Both ends of the lifting beam are placed on the bearing surface at the top of the jack piston rod. The hydraulic jacking system includes a jack and its matching base. The jack is fixedly installed above the pad box. The piston rod of the jack extends upward and cooperates with the two ends of the jacking beam mounted on the salvage main rod to push.

[0009] Furthermore, the jacks work in conjunction with ground-based cranes, with the crane's cables suspending the top of the salvage main pole assembly. When the jacks push the lifting beam and the main pole passing through it upwards by the distance of one lifting beam slot, the ground-based crane suspends the salvage main pole assembly under load. The jacks then retract and remove the lifting beam, which is then moved downwards and inserted into the next lifting beam slot on the main pole. Subsequently, the jacks extend and lift again, repeating this cycle to achieve step-by-step salvage.

[0010] Furthermore, the lifting beam socket is a rectangular through hole opened on both sides of the salvage main rod. The two ends of the lifting beam span the outside of the salvage main rod, and the middle part passes through the lifting beam socket, connecting the salvage main rod assembly with the jacks on both sides into an integrated force coupling system.

[0011] Furthermore, the horizontal wing plate is a steel plate that is horizontally set in the main body, and the supporting rib plate below it is vertically connected to the main rod and the bottom side of the horizontal wing plate.

[0012] Furthermore, an inverted L-shaped or inverted J-shaped steel grab hook is installed at the bottom of the salvage main rod assembly for hooking the grab bucket of the trenching machine.

[0013] Furthermore, in the event of a jamming or falling accident involving the grab bucket of the trenching machine, the salvage main pole assembly is slowly lowered into the trench section of the ground wall using a crane until the hook at the bottom of the main pole catches the grab bucket. At this time, the jacks of the hydraulic jacking system are in a low position, the ground load-bearing reaction frame is stably erected on the guide wall, and the jacking beam is inserted into the socket of the jacking beam of the main pole.

[0014] Furthermore, both the pad box and the load-bearing reaction box are closed or semi-closed box-shaped structures welded from channel steel or H-beams.

[0015] Furthermore, the load-bearing reaction box is equipped with reinforcing ribs inside to distribute the force and enhance rigidity.

[0016] Furthermore, the side wing plate of the pad box is provided with reinforcing ribs to distribute the force and enhance the rigidity.

[0017] Furthermore, the reinforcing ribs are vertically welded to both sides of the pad box to prevent local buckling or deformation of the pad box under the reaction force of the jack.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a hook welded to the lower end of the main retrieval pole to directly hook the grab bucket, combined with horizontal wing plates with supporting ribs to enhance the overall rigidity of the main pole, ensuring structural stability during lowering and stress application. A composite load-bearing reaction frame, consisting of a roadbed steel plate, a load-bearing reaction box with internal ribs, and pad boxes with reinforcing ribs on both sides, is installed on the ground to effectively disperse the enormous reaction force generated during retrieval, preventing damage to the pit guide wall. Simultaneously, through the cooperation of jacks with the lifting beam and multiple sockets on the main pole, combined with ground crane assistance for suspension, a "step-by-step" segmented lifting is achieved, breaking the limitations of conventional cranes' single lifting height. This transforms the enormous pulling force into a controllable mechanical thrust, safely and efficiently retrieving the grab bucket stuck in the deep trench. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the grab bucket salvage device for the trenching machine of the present invention; Figure 2 This is a three-dimensional schematic diagram of the salvage main rod assembly structure of the present invention; Figure 3 This is a schematic plan view of the salvage main pole assembly structure of the present invention; Figure 4 This is a three-dimensional schematic diagram of the load-bearing reaction frame and hydraulic lifting system of the present invention; Figure 5This is a schematic plan view of the load-bearing reaction frame and hydraulic lifting system of the present invention; In the diagram: 1. Ground load-bearing reaction frame; 101. Roadbed steel plate; 102. Load-bearing reaction box; 103. Internal reinforcing rib; 104. Pad box; 105. Reinforcing rib; 2. Salvage main pole assembly; 201. Main pole; 202. Horizontal wing plate; 203. Support rib; 204. Load-bearing slot / insert; 3. Lifting crossbeam; 4. Hydraulic lifting system; 401. Jack; 402. Jack base. Detailed Implementation

[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the description herein... The preferred embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0021] like Figures 1 to 5 As shown in the figure, an embodiment of the present invention provides a novel grab bucket salvage device for trenching machines, including a ground-based crane (not shown) and a pit guide wall (not shown). The device also includes a salvage main rod assembly 2, a ground-based load-bearing reaction frame 1, a lifting beam 3, and a hydraulic lifting system 4.

[0022] The ground-supporting reaction frame 1 is laid above the guide wall of the foundation pit, including a roadbed steel plate 101 as the bottom foundation. A load-bearing reaction box 102 is provided above the roadbed steel plate 101. The load-bearing reaction box 102 is provided with reinforcing ribs 103 inside to distribute the force and enhance the rigidity. A pad box 104 is provided on the top of the load-bearing reaction box 102 to distribute the jack reaction force. A reinforcing rib 105 is provided below the side wing plate of the pad box 104 to distribute the force and enhance the rigidity.

[0023] The salvage main pole assembly 2 is a single, continuous vertical main pole. Horizontal wing plates 202 extending outwards are linearly and evenly distributed along the pole body of the main pole 201. Supporting ribs 203 are provided between the horizontal wing plates 202 and the main pole. Multiple lifting crossbeam insertion slots 204 are evenly distributed along the length of the main pole 201. The bottom end of the main pole 201 can be welded with a hook (not shown in the figure) for hooking the grab bucket of the trenching machine, which is integrated with the main pole 201. The lifting beam 3 is mounted on the center of the main rod 201 and can be horizontally and flushly inserted into the lifting beam slot 204. Both ends of the lifting beam 3 are placed on the bearing surface at the top of the jack piston rod. The hydraulic jacking system 4 includes a jack 401 and its matching base 402. The jack 401 is fixedly installed above the pad box 104. The piston rod of the jack 401 extends upward and cooperates with the two ends of the jacking beam 3 mounted on the salvage main rod assembly 2 for jacking.

[0024] Furthermore, the jack 401 works in conjunction with the ground crane, with the crane's cable suspending the top of the salvage main pole assembly 2. When the jack 401 pushes the lifting beam 3 and the main pole passing through it upwards by the distance of the lifting beam insertion slot 204, the ground crane suspends the salvage main pole assembly 2 under the force. The jack 401 retracts and removes the lifting beam 3, then moves the lifting beam 3 downwards and inserts it into the next lifting beam insertion slot 204 of the main pole. Subsequently, the jack 401 extends and lifts again, repeating this cycle to achieve step-by-step salvage.

[0025] Furthermore, the lifting beam inlet 204 is a rectangular through hole opened on both sides of the salvage main rod assembly 2. The two ends of the lifting beam 3 span the outside of the salvage main rod assembly 2, and the middle part passes through the lifting beam inlet 204, connecting the salvage main rod assembly 2 with the jacks 401 on both sides into an integrated force coupling system.

[0026] Furthermore, the horizontal wing plate 202 is a steel plate that is horizontally set as the main body, and the supporting rib plate 203 below it is vertically connected to the bottom side of the main rod and the horizontal wing plate 202; the bottom of the salvage main rod assembly 2 can be equipped with an inverted L-shaped or inverted J-shaped steel grab hook for hooking the troughing machine grab bucket.

[0027] Specifically, in the event of a jamming or falling accident involving the grab bucket of the trenching machine, the main salvage assembly 2 is first slowly lowered into the trench section of the ground wall using a crane until the hook at the bottom of the main assembly catches the grab bucket. At this time, the jacks 401 of the hydraulic jacking system 4 are in a low position, and the ground load-bearing reaction frame 1 is stably erected on the guide wall. The lifting beam 3 is then inserted into the lifting beam socket 204 of the main assembly 201.

[0028] The hydraulic jacking system 4 is activated, and jack 401 simultaneously pushes the lifting beam 3 upwards, causing the main pole 201 to move upwards by one insertion distance. During this process, the ground crane maintains a slight tension on the cable to cope with emergencies. After moving one distance, the crane tightens the cable to suspend the salvage main pole 201. At this time, jack 401 retracts, and the operator pulls the lifting beam 3 out of the slot and moves it downwards to insert it into the next insertion 204 of the main pole 201. Jack 401 is activated again to lift, and this cycle is repeated, with the main pole 201 and the bottom grab bucket climbing upwards step by step.

[0029] Because the pad box 104 is equipped with reinforcing ribs 105 on both sides, the pad box 104 will not deform when the jack 401 generates a huge lifting reaction force each time. This ensures that the reaction force is smoothly transmitted to the load-bearing reaction box 102 and the roadbed steel plate 101 below, and finally distributed to the guide wall foundation, ensuring that the grab bucket salvage operation is completed safely and smoothly at a depth of tens of meters underground.

[0030] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A grab bucket salvage device for a trenching machine, characterized in that, This includes ground-based cranes, ground-based load-bearing reaction frames, salvage main pole components, lifting beams, and hydraulic lifting systems; The ground load-bearing reaction frame is laid above the guide wall of the foundation pit and includes a roadbed steel plate as the bottom foundation. A load-bearing reaction box is provided above the roadbed steel plate. A pad box for dispersing the reaction force of the jack is provided on the top of the load-bearing reaction box. The salvage main rod assembly is a single, continuous vertical main rod. Horizontal wing plates extending outwards are linearly and evenly distributed along the main rod. Support ribs are provided between the horizontal wing plates and the main rod. Multiple lifting beam slots are evenly distributed along the length of the main rod. Hooks for hooking the grab bucket of the trenching machine can be welded to the bottom of the main rod. The lifting beam is mounted on the center of the main pole assembly and is horizontally and flush with the insertion slot of the lifting beam. Both ends of the lifting beam are placed on the bearing surface at the top of the jack piston rod. The hydraulic jacking system includes a jack and its matching base. The jack is fixedly installed above the pad box. The piston rod of the jack extends upward and cooperates with the two ends of the jacking beam mounted on the salvage main rod to push.

2. The trenching machine grab bucket salvage device according to claim 1, characterized in that, The jacks work in conjunction with the ground-based crane, whose cables suspend the top of the salvage main pole assembly. When the jacks push the lifting beam and the main pole passing through it upwards by the distance of one lifting beam insertion slot, the ground-based crane suspends the salvage main pole assembly under load. The jacks then retract and remove the lifting beam, which is then moved downwards and inserted into the next lifting beam insertion slot on the main pole. Subsequently, the jacks extend and lift again, repeating this cycle to achieve step-by-step salvage.

3. The trenching machine grab bucket salvage device according to claim 1, characterized in that, The lifting beam socket is a rectangular through hole opened on both sides of the salvage main rod. The two ends of the lifting beam span the outside of the salvage main rod, and the middle part passes through the lifting beam socket, connecting the salvage main rod assembly with the jacks on both sides into an integrated force coupling system.

4. The trenching machine grab bucket salvage device according to claim 1, characterized in that, The horizontal wing plate is a steel plate that is horizontally set in the main body, and the supporting rib plate below it is vertically connected to the main rod and the bottom side of the horizontal wing plate.

5. The trenching machine grab bucket salvage device according to claim 1, characterized in that, The bottom of the salvage main rod assembly is equipped with an inverted L-shaped or inverted J-shaped steel grab hook, which is used to hook the grab bucket of the troughing machine.

6. The trenching machine grab bucket salvage device according to claim 5, characterized in that, In the event of a jamming or falling accident involving the grab bucket of the trenching machine, the main salvage assembly is slowly lowered into the trench section of the ground wall using a crane until the hook at the bottom of the main pole catches the grab bucket. At this time, the jacks of the hydraulic jacking system are in a low position, and the ground load-bearing reaction frame is stably erected on the guide wall. The jacking beam is then inserted into the jacking beam slot of the main pole.

7. The trenching machine grab bucket salvage device according to claim 1, characterized in that, Both the pad box and the load-bearing reaction box are closed or semi-closed box-shaped structures welded from channel steel or H-beams.

8. The trenching machine grab bucket salvage device according to claim 1, characterized in that, The load-bearing reaction box is equipped with reinforcing ribs that disperse the force and enhance rigidity.

9. The trenching machine grab bucket salvage device according to claim 1, characterized in that, The side wing plate of the pad box is provided with reinforcing ribs to distribute the force and enhance the rigidity.

10. The trenching machine grab bucket salvage device according to claim 9, characterized in that, The reinforcing ribs are vertically welded to both sides of the pad box to prevent local buckling or deformation of the pad box under the reaction force of the jack.

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