Device for lowering large steel caissons into steel casings during neap tides

Abstract

This invention discloses a device for lowering a large steel caisson into a steel casing during neap tides. The device includes a lifting frame, a second lifting ring, a limiting mechanism, a guiding mechanism, and a moving mechanism. The limiting mechanism comprises a limiting box, limiting teeth, a limiting cylinder, a blocking box, a damping piston, a separating block, and a conducting piston. A first lifting ring is fixedly connected to the upper surface of the lifting frame. The limiting box is fixedly connected to the rear end of the damping piston, and the interior of the limiting box is fixedly connected to the limiting cylinder. By setting the limiting mechanism, the sway of the caisson is reduced during lifting through a throttling principle. When the caisson sways to the other side, the sway in that direction is also reduced through the throttling principle, thus achieving the device's ability to limit the caisson's movement during installation.

Description

Technical Field

[0001] This invention relates to the field of engineering construction technology, and in particular to a device for lowering a large steel caisson into a steel casing during neap tides. Background Technology

[0002] The large steel caisson rapid and precise lowering device during neap tides is a specialized construction equipment that relies on the heavy-load bearing capacity and multi-point synchronous control capabilities of a large floating crane. It is specifically designed for use during the gentle flow window of neap tides to achieve the smooth and rapid lowering of large steel caissons and precise docking with steel casings.

[0003] Existing devices of this type have the problem of insufficient restraint on the caisson during lowering. For example, a steel caisson lowering device disclosed in Chinese Patent Publication No. CN221760468U uses a winch to lower or lift the steel caisson. However, in actual use, the caisson may sway during lowering due to wind or load during hoisting, which makes the installation of the caisson and the steel casing difficult, as the swaying makes alignment between the steel casing and the caisson more challenging. Therefore, this application proposes a device for lowering large steel caissons to steel casings during neap tides. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device for lowering large steel caissons into steel casings during neap tides.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The device for lowering a large steel caisson into a steel casing during neap tides includes a lifting frame, a second lifting ring, a limiting mechanism, a guiding mechanism, and a moving mechanism. The limiting mechanism includes a limiting box, a limiting tooth, a limiting cylinder, a blocking box, a damping piston, a separator, and a conducting piston. A lifting ring is fixedly connected to the upper surface of the lifting frame. The limiting box is fixedly connected to the rear end of the damping piston. The inside of the limiting box is fixedly connected to the limiting cylinder. The front end of the output shaft of the limiting cylinder is fixedly connected to the limiting tooth. The bottom of the blocking box is fixedly connected to the conducting piston. A conducting block is fixedly connected to the upper end of the output shaft of the conducting piston, the interior of the damping piston is fixedly connected to the partition block, and the output shaft of the conducting piston is slidably and sealedly connected to the damping piston.

[0006] Preferably, the guiding mechanism includes a conical guide rod, a vertical guide rod, a transverse guide rod, a two-way lead screw, a locking lead screw, and a guide cylinder; The guide rod cooperates with the guide cylinder, and a guide plate is fixedly connected to the upper surface of the guide cylinder. The guide plate is fixedly connected to the vertical guide rod, and the locking screw is rotatably connected to the guide plate.

[0007] Preferably, the moving structure includes a transverse motor, a transverse moving lead screw, a lead screw mating block, a support beam, a connecting block, a longitudinal motor, a longitudinal lead screw, and a sliding load-bearing groove; The sliding load-bearing groove is formed on the inner wall of the hoisting frame. The output shaft of the transverse motor is fixedly connected to one end of the transverse moving screw, and the other end of the transverse moving screw is rotatably connected to the connecting block.

[0008] Preferably, there are four damping pistons, two of which are fixedly connected to the output shafts of the damping pistons, and there are two damping rings in total. A hook is connected to the bottom of the lifting block.

[0009] Preferably, the lifting block is slidably connected to the support beam, the transverse motor is fixedly connected to the upper surface of the support beam, and the longitudinal motor is fixedly connected to the lower surface of the lifting frame.

[0010] Preferably, the output shaft of the longitudinal motor is rotatably connected to the longitudinal lead screw, the other end of the longitudinal lead screw is rotatably connected to the hoisting frame, and the support beam slides inside the sliding load-bearing groove.

[0011] Preferably, one end of the transverse guide rod is fixedly connected to a support platform, both ends of the bidirectional lead screw are threadedly connected to the support platform, and the vertical guide rod is slidably connected to the support platform.

[0012] Preferably, the locking screw is threadedly connected to the support platform, and the other end of the transverse guide rod is slidably connected to the support platform.

[0013] Preferably, the lead screw mating block is threadedly connected to the transverse moving lead screw, a lifting block is fixedly connected to the lead screw mating block, a connecting side plate is fixedly connected to the lower surface of the lifting frame, and a load-bearing block is fixedly connected to the upper surface of the lifting block.

[0014] The present invention has the following beneficial effects: 1. By setting a limiting mechanism, the sway of the hoisting box is reduced by the throttling principle when the hoisting box is being hoisted. When the hoisting box sways to the other side, the sway in the other direction can be reduced by the throttling principle, thereby limiting the hoisting box when it is installed.

[0015] 2. By setting a guide block, during the installation of the hoisting box, the guide block can block the micro-holes on the partition block as the output shaft of the guide piston extends, thereby disabling the throttling principle, locking the output rod of the damping piston, and preventing the hoisting box from moving. This locks the position of the hoisting box, facilitating its lowering after alignment with the steel casing.

[0016] 3. By setting a guiding mechanism, during the installation and lowering of the hoisting box, the guide cylinder and guide rod cooperate to change the position of the hoisting box, so that the position of the hoisting box is aligned with the position of the steel casing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the device proposed in this invention for lowering a large steel caisson into a steel casing during neap tides; Figure 2 This is a schematic diagram of the damping ring structure of the device proposed in this invention for lowering a large steel caisson into a steel casing during neap tides; Figure 3 This is a schematic diagram showing the position of the limiting cylinder in the device for lowering a large steel caisson into a steel casing during neap tides, as proposed in this invention. Figure 4 This is a schematic diagram of the partition block of the device for lowering a large steel caisson into a steel casing during neap tides, as proposed in this invention. Figure 5 This is a schematic diagram of the guide block of the device proposed in this invention for lowering a large steel caisson into a steel casing during neap tides; Figure 6 This is a schematic diagram of the limiting teeth of the device proposed in this invention for lowering a large steel caisson into a steel casing during neap tides; Figure 7 This is a schematic diagram of the structure of the load-bearing block of the device proposed in this invention for lowering a large steel caisson into a steel casing during neap tides; Figure 8 This is a schematic diagram of the bidirectional lead screw of the device for lowering a large steel caisson into a steel casing during neap tides, as proposed in this invention. Figure 9 This is a schematic diagram of the guide rod of the device proposed in this invention for lowering a large steel caisson into a steel casing during neap tides; Figure 10 This is a schematic diagram of one set of damping piston structures in the device proposed in this invention for lowering a large steel caisson into a steel casing during neap tides; Figure 11 This is a schematic diagram of another set of damping piston structures in the device proposed in this invention for lowering a large steel caisson into a steel casing during neap tides.

[0018] In the diagram: 1. No. 1 lifting ring; 2. Lifting frame; 3. Horizontal motor; 4. Horizontal moving lead screw; 5. Connecting block; 6. Lifting block; 7. Lead screw mating block; 8. Connecting side plate; 9. Sliding load-bearing groove; 10. Limiting tooth; 11. Longitudinal motor; 12. Longitudinal lead screw; 13. Limiting box; 14. Blocking box; 15. Damping ring; 16. Lifting hook; 17. Conductor block; 18. Limiting cylinder; 19. Damping piston; 20. Separator block; 21. Conductor piston; 22. Load-bearing block; 23. No. 2 lifting ring; 24. Vertical guide rod; 25. Locking lead screw; 26. Bidirectional lead screw; 27. Horizontal guide rod; 28. Steel casing; 29. ​​Guide rod; 30. Guide cylinder; 31. Guide plate; 32. Support platform; 33. Support beam; 34. Steel lifting box. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example 1: The device for lowering a large steel caisson into a steel casing during neap tides includes a lifting frame 2, a second lifting ring 23, a limiting mechanism, a guiding mechanism, and a moving mechanism. The limiting mechanism includes a limiting box 13, a limiting tooth 10, a limiting cylinder 18, a blocking box 14, a damping piston 19, a separator block 20, and a connecting piston 21. A first lifting ring 1 is fixedly connected to the upper surface of the lifting frame 2. The limiting box 13 is fixedly connected to the rear end of the damping piston 19. The interior of the limiting box 13 is fixedly connected to the limiting cylinder 18. The front end of the output shaft of the limiting cylinder 18 is fixedly connected to the limiting tooth 10. The inner bottom of the blocking box 14 is fixedly connected to the connecting piston 21.

[0021] A conducting block 17 is fixedly connected to the upper end of the output shaft of the conducting piston 21, and the interior of the damping piston 19 is fixedly connected to the partition block 20. The output shaft of the conducting piston 21 is slidably sealed to the damping piston 19.

[0022] The lead screw mating block 7 is threadedly connected to the transverse moving lead screw 4. A lifting block 6 is fixedly connected to the lead screw mating block 7. A connecting side plate 8 is fixedly connected to the lower surface of the lifting frame 2. A load-bearing block 22 is fixedly connected to the upper surface of the lifting block 6.

[0023] It should be noted that when using this device, the guide rod 29 needs to be fixedly connected to the steel casing 28 first. The steel casing 28 will be built in advance before hoisting the steel casket. There is a hole at the bottom of the steel casket. After the casket is lowered to the design elevation, the vertical weight is transferred by the inner wall brackets resting on the support ring of the steel casing.

[0024] Then, using precision-rolled threaded steel tie rods, the top plate of the caisson is anchored to the steel casing support. At the same time, wedges are driven into the gap between the guide sleeve and the steel casing to strengthen the horizontal anti-sway capacity. Finally, bottom sealing concrete is poured to wrap around the bottom plate of the caisson to complete the fixation of the steel caisson. However, before fixation, the steel caisson needs to be lifted, positioned, and lowered.

[0025] When using this device, firstly, hook the device onto the first lifting ring 1 using the hook, and connect the hook to the lifting part of the lifting equipment. After completing the above steps, hook the hook 16 of the device onto the second lifting ring 23, and fix the second lifting ring 23 to the outer surface of the steel caisson 34. Then, place the damping ring 15 onto the outer wall of the steel caisson 34 and close it so that its inner wall fits against the outer wall of the steel caisson 34. Then, start the lifting equipment to move the steel caisson 34 above the steel casing 28. When it reaches the desired position, lower it slowly.

[0026] refer to Figure 1 and Figure 2 When the two damping rings 15 are fitted onto the steel caisson 34, the swaying force generated by the movement of the steel caisson 34 relative to the steel casing 28 is transmitted to the damping rings 15, causing them to be pushed. Since the damping rings 15 are fixedly connected to the output rod of the damping piston 19, when the damping rings 15 move due to the swaying of the steel caisson 34, the force is transmitted to the output rod of the damping piston 19, causing the output rod of the damping piston 19 to extend or retract.

[0027] When its output rod extends or retracts, the sealed volume changes, causing the hydraulic oil on one side of the damping piston 19 to be compressed or pumped out. (Refer to...) Figure 4 The partition block 20 divides the interior of the damping piston 19 into two regions, which are connected by micro-holes. When the output shaft of the damping piston 19 moves, hydraulic oil is allowed to pass through the micro-holes on the partition block 20. Since the hydraulic oil cannot pass through all the micro-holes in a short time, the movement of the output shaft of the damping piston 19 will be relatively slow, thereby limiting the position of the damping ring 15 and thus limiting the swaying of the steel lifting box 34, so that it can be more easily aligned with the steel casing 28.

[0028] refer to Figure 6 When the limiting mechanism in this device needs to operate, the limiting cylinder 18 must be activated first. The output shaft of the limiting cylinder 18 is fixedly connected to the limiting teeth 10. There are four sets of limiting teeth 10, two of which are fixedly connected to the output shaft of the limiting cylinder 18, and the other two are fixedly connected to the lower surface of the lifting frame 2. When the output shaft of the limiting cylinder 18 extends, the two sets of limiting teeth 10 can mesh and lock together, thereby locking the position of the damping piston 19.

[0029] Example 2: The guiding mechanism includes a conical guide rod 29, a vertical guide rod 24, a horizontal guide rod 27, a bidirectional lead screw 26, a locking lead screw 25, and a guide cylinder 30. The guide rod 29 cooperates with the guide cylinder 30, and a guide plate 31 is fixedly connected to the upper surface of the guide cylinder 30. The guide plate 31 is fixedly connected to the vertical guide rod 24, and the locking lead screw 25 is rotatably connected to the guide plate 31.

[0030] There are four damping pistons 19, two of which have damping rings 15 fixedly connected to their output shafts. There are two damping rings 15. A hook 16 is connected to the bottom of the lifting block 6.

[0031] The output shaft of the longitudinal motor 11 is rotatably connected to the longitudinal lead screw 12, and the other end of the longitudinal lead screw 12 is rotatably connected to the hoisting frame 2. The support beam 33 slides inside the sliding load-bearing groove 9.

[0032] The guide mechanism is used to make fine adjustments to the position of the steel caisson 34. It needs to be installed inside the steel caisson 34 beforehand. During installation, the guide mechanism can be placed inside the steel caisson 34 first, and then the double-acting screw 26 can be turned. The double-acting screw 26 is threadedly connected to two support platforms 32 at the same time, and its two ends are threads with opposite directions of rotation.

[0033] Therefore, when the bidirectional lead screw 26 rotates, the two support platforms 32 can move in a direction that moves away from or towards each other. When using the guide mechanism, the two support platforms 32 need to be moved away from each other so that they are simultaneously moved away from and supported between the inner walls of the steel lifting box 34.

[0034] refer to Figure 9 It should be noted that the outer contour of the support platform 32 needs to fit the inner contour of the steel caisson 34. When the two support platforms 32 are simultaneously moved away from and supported between the inner walls of the steel caisson 34, the locking screw 25 can be rotated. Since the locking screw 25 is threadedly connected to the support platform 32, it can rise or fall when the locking screw 25 is rotated, thereby driving the guide plate 31 to rise or fall.

[0035] refer to Figure 9 The inside of the guide cylinder 30 is conical and concentric with the circle at the upper end of the guide rod 29. The guide cylinder 30 is fixedly connected to the guide plate 31, and its position needs to be the same as that of the guide rod 29. In use, the guide mechanism is locked between the inner walls of the steel hoisting box 34. As the steel hoisting box 34 descends, the guide cylinder 30 will contact the upper end of the guide rod 29.

[0036] Because the inside of the guide cylinder 30 is conical, the guide cylinder 30 and the guide rod 29 will make it easier to contact each other. When the position of the steel lifting box 34 is not aligned with the steel protective cylinder 28 and there is some error, lowering the steel lifting box 34 will allow the inclined surface on the guide rod 29 to contact the inclined surface inside the guide cylinder 30, thereby slightly changing the position of the steel lifting box 34, so that the position of the steel lifting box 34 can be finely adjusted and made easier to install.

[0037] Example 3: The moving structure includes a transverse motor 3, a transverse moving lead screw 4, a lead screw mating block 7, a support beam 33, a connecting block 5, a longitudinal motor 11, a longitudinal lead screw 12, and a sliding load-bearing groove 9. The sliding load-bearing groove 9 is formed on the inner side wall of the hoisting frame 2. The output shaft of the transverse motor 3 is fixedly connected to one end of the transverse moving lead screw 4, and the other end of the transverse moving lead screw 4 is rotatably connected to the connecting block 5.

[0038] The lifting block 6 is slidably connected to the support beam 33, the transverse motor 3 is fixedly connected to the upper surface of the support beam 33, and the longitudinal motor 11 is fixedly connected to the lower surface of the lifting frame 2.

[0039] One end of the transverse guide rod 27 is fixedly connected to the support platform 32, both ends of the bidirectional lead screw 26 are threadedly connected to the support platform 32, and the vertical guide rod 24 is slidably connected to the support platform 32. The locking lead screw 25 is threadedly connected to the support platform 32, and the other end of the transverse guide rod 27 is slidably connected to the support platform 32.

[0040] Then, depending on the actual needs of the project, either the horizontal motor 3 or the vertical motor 11 is started. Both the horizontal motor 3 and the vertical motor 11 have lead screws on their output shafts to move the suspended steel caisson 34. It should be noted that the horizontal moving lead screw 4 and the vertical lead screw 12 do not bear the weight of the steel caisson 34; the weight of the steel caisson 34 is borne by the support beam 33. The horizontal moving lead screw 4 and the vertical lead screw 12 only serve to move the steel caisson 34. Since the weight is borne by the support beam 33, the horizontal moving lead screw 4 and the vertical lead screw 12 only need to provide enough force to overcome the air resistance of the steel caisson 34 to move it.

[0041] refer to Figure 2 When the horizontal motor 3 is started, the horizontal moving lead screw 4 will rotate, causing the lead screw mating block 7 to move. Since the lead screw mating block 7 is fixedly connected to the lifting block 6, the movement of the lead screw mating block 7 will cause the lifting block 6 to move as well, thereby causing the steel caisson 34 to move as a whole. Similarly, when the steel caisson 34 needs to move longitudinally, the longitudinal motor 11 can be started. The longitudinal motor 11 will cause the longitudinal lead screw 12 to rotate. The longitudinal lead screw 12 is threadedly connected to the support beam 33, so the rotation of the longitudinal lead screw 12 can cause the support beam 33 to move longitudinally.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for lowering a large steel caisson into a steel casing during neap tides, comprising a lifting frame (2), a second lifting ring (23), a limiting mechanism, a guiding mechanism, and a moving mechanism, characterized in that, The limiting mechanism includes a limiting box (13), a limiting tooth (10), a limiting cylinder (18), a blocking box (14), a damping piston (19), a separator (20), and a conducting piston (21). A lifting ring (1) is fixedly connected to the upper surface of the lifting frame (2). The limiting box (13) is fixedly connected to the rear end of the damping piston (19). The interior of the limiting box (13) is fixedly connected to the limiting cylinder (18). The front end of the output shaft of the limiting cylinder (18) is fixedly connected to the limiting tooth (10). The inner bottom of the blocking box (14) is fixedly connected to the conducting piston (21). The upper end of the output shaft of the conducting piston (21) is fixedly connected to the conducting block (17), the interior of the damping piston (19) is fixedly connected to the partition block (20), and the output shaft of the conducting piston (21) is slidably sealed to the damping piston (19).

2. The device for lowering a large steel caisson into a steel casing during neap tides according to claim 1, characterized in that, The guiding mechanism includes a conical guide rod (29), a vertical guide rod (24), a horizontal guide rod (27), a two-way lead screw (26), a locking lead screw (25), and a guide cylinder (30); The guide rod (29) cooperates with the guide cylinder (30), and a guide plate (31) is fixedly connected to the upper surface of the guide cylinder (30). The guide plate (31) is fixedly connected to the vertical guide rod (24), and the locking screw (25) is rotatably connected to the guide plate (31).

3. The device for lowering a large steel caisson into a steel casing during neap tides according to claim 1, characterized in that, The moving structure includes a transverse motor (3), a transverse moving lead screw (4), a lead screw mating block (7), a support beam (33), a connecting block (5), a longitudinal motor (11), a longitudinal lead screw (12), and a sliding load-bearing groove (9); The sliding load-bearing groove (9) is opened on the inner side wall of the hoisting frame (2). The output shaft of the horizontal motor (3) is fixedly connected to one end of the horizontal moving screw (4), and the other end of the horizontal moving screw (4) is rotatably connected to the connecting block (5).

4. The device for lowering a large steel caisson into a steel casing during neap tides according to claim 1, characterized in that, There are four damping pistons (19), two of which have damping rings (15) fixedly connected to their output shafts. There are two damping rings (15). A hook (16) is connected to the bottom of the lifting block (6).

5. The device for lowering a large steel caisson into a steel casing during neap tides according to claim 3, characterized in that, The lifting block (6) is slidably connected to the support beam (33), the transverse motor (3) is fixedly connected to the upper surface of the support beam (33), and the longitudinal motor (11) is fixedly connected to the lower surface of the lifting frame (2).

6. The device for lowering a large steel caisson into a steel casing during neap tides according to claim 3, characterized in that, The output shaft of the longitudinal motor (11) is rotatably connected to the longitudinal lead screw (12), the other end of the longitudinal lead screw (12) is rotatably connected to the hoisting frame (2), and the support beam (33) slides inside the sliding load-bearing groove (9).

7. The device for lowering a large steel caisson into a steel casing during neap tides according to claim 2, characterized in that, One end of the transverse guide rod (27) is fixedly connected to a support platform (32), both ends of the bidirectional lead screw (26) are threadedly connected to the support platform (32), and the vertical guide rod (24) is slidably connected to the support platform (32).

8. The device for lowering a large steel caisson into a steel casing during neap tides according to claim 2, characterized in that, The locking screw (25) is threadedly connected to the support platform (32), and the other end of the transverse guide rod (27) is slidably connected to the support platform (32).

9. The device for lowering a large steel caisson into a steel casing during neap tides according to claim 3, characterized in that, The lead screw mating block (7) is threadedly connected to the transverse moving lead screw (4). A lifting block (6) is fixedly connected to the lead screw mating block (7). A connecting side plate (8) is fixedly connected to the lower surface of the lifting frame (2). A load-bearing block (22) is fixedly connected to the upper surface of the lifting block (6).

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