Wire saw buffer shock absorbing device for underwater cutting and construction vessel

Abstract

The present invention provides a rope saw buffering and shock absorbing device for underwater cutting and a construction ship, and relates to the technical field of underwater operation. The present invention solves the technical problems of low underwater cutting efficiency, easy saw jamming, and equipment damage in the prior art. The rope saw buffering and shock absorbing device for underwater cutting includes a main support, a slide bar, a rope saw guide wheel, a shock absorbing and buffering structure, and a lifting frame. When the distance between the deck and the workpiece of the construction ship is enlarged under the action of waves, the rope saw used for underwater cutting can pull the middle guide wheel bypassed by the rope saw and drive the lifting frame to slide upward along the slide bar through the middle guide wheel. When the distance between the deck and the workpiece of the construction ship is reduced under the action of waves, the lifting frame slides downward along the slide bar under the action of gravity. The present invention has the advantages of high underwater cutting efficiency, no easy saw jamming during sawing, and long equipment service life.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater operations, and in particular to a rope saw buffering and shock absorbing device for underwater cutting and a construction vessel provided with the rope saw buffering and shock absorbing device for underwater cutting. Background Art

[0002] Reinforced concrete caissons are important devices used in submarine structures. After the submarine structure is completed, some reinforced concrete caissons need to be removed to facilitate other subsequent construction.

[0003] During the construction of dismantling reinforced concrete caissons at sea, the underwater cutting of the caissons is affected by the excessive surge on site, causing the construction vessel to rise and fall at a high altitude and high frequency. At the same time, since the diamond underwater cutting machine is fixed on the construction ship, the rope saw (or chain) used by the diamond underwater cutting machine to cut the reinforced concrete caisson will rise and fall with the construction ship, and the tightness will continue to change.

[0004] The applicant has discovered that the prior art has at least the following technical problems:

[0005] In the prior art, the wire saw used for underwater cutting in the diamond underwater cutting machine lacks a buffer and shock-absorbing device, which causes the wire saw to be sometimes loose and sometimes tight when rotating and sawing the caisson. Because the wire saw is flexible, the tension and sawing force applied by the wire saw to the reinforced concrete caisson are sometimes too large and sometimes too small, and the cutting direction is also easy to change. Not only is the wire saw easy to fall off or disengage from the predetermined cutting groove of the reinforced concrete caisson, but the wire saw also often gets stuck. After the wire saw falls off or disengages from the cutting groove of the reinforced concrete caisson, the machine needs to be stopped and reset. After the wire saw gets stuck, the machine needs to be stopped and re-combed, which results in very low cutting efficiency. At the same time, if the force on the turntable used by the diamond cutting machine to drive the wire saw changes frequently, the load on the hydraulic pump and drive shaft of the diamond cutting machine will cause frequent changes, which can easily cause damage to the diamond cutting machine. Summary of the Invention

[0006] The embodiment of the present invention provides a wire saw buffering and shock absorbing device for underwater cutting, which solves the technical problems in the prior art of low underwater cutting efficiency and easy occurrence of saw jamming and equipment damage.

[0007] The embodiments of the present invention provide the following technical solutions:

[0008] An embodiment of the present invention provides a wire saw buffering and shock absorbing device for underwater cutting, comprising a main support, a slide bar, a wire saw guide wheel, a shock absorbing and buffering structure, and a lifting frame, wherein:

[0009] The main support is fixedly connected to the deck of the construction vessel;

[0010] The main support includes an upper crossbeam, a lower crossbeam, a connecting beam and a diagonal brace; the top of the diagonal brace and the upper crossbeam are fixedly connected to the top of the slide bar, one end of the connecting beam and the lower crossbeam are fixedly connected to the bottom of the slide bar, and the other end of the connecting beam is fixedly connected to the bottom of the diagonal brace;

[0011] The sliding rod passes through the lifting frame, and a shock-absorbing and buffering structure is provided on the lower crossbeam and the lifting frame; the lifting frame can slide upward along the sliding rod to a position where the shock-absorbing and buffering structure on the lifting frame contacts the upper crossbeam, and can slide downward to a position where the lifting frame contacts the shock-absorbing and buffering structure on the lower crossbeam;

[0012] The rope saw guide wheel includes a plurality of upper guide wheels, a plurality of middle guide wheels and a plurality of lower guide wheels, wherein the upper guide wheels are arranged on the upper crossbeam; the middle guide wheels are arranged on the bottom of the lifting frame; and the lower guide wheels are arranged on the lower crossbeam;

[0013] The rope saw for underwater cutting is connected end to end to form a ring, and after the rope saw passes through the rope saw driving turntable of the underwater cutting machine and passes through the workpiece to be cut underwater, it passes through at least part of the upper guide wheel, at least part of the middle guide wheel, and at least part of the lower guide wheel. When the rope saw driving turntable of the underwater cutting machine rotates, it can drive the rope saw to rotate, saw the workpiece, and drive the upper guide wheel, the middle guide wheel, and the lower guide wheel that the rope saw has passed through to rotate;

[0014] When the distance between the deck of the construction ship and the workpiece is enlarged due to the action of waves, the rope saw can pull the middle guide wheel that the rope saw bypasses and drive the lifting frame to slide upward along the slide rod through the middle guide wheel. When the distance between the deck of the construction ship and the workpiece is reduced due to the action of waves, the lifting frame slides downward along the slide rod under the action of gravity.

[0015] Optionally, the wire saw guide wheel further comprises a plurality of anti-slip guide wheels, wherein the anti-slip guide wheels are arranged on the top of the lifting frame, and the wire saw passes around the wire saw driving turntable of the underwater cutting machine, first passes around the wire saw guide wheels and then enters the water to pass through the workpiece. When the wire saw drives the turntable to rotate, the anti-slip guide wheels passed by the wire saw can be driven to rotate;

[0016] The upper guide wheels are symmetrically arranged on the upper crossbeam; the middle guide wheels are symmetrically arranged on the bottom of the lifting frame; the anti-slip guide wheels are arranged on the top of the lifting frame, and the lower guide wheels are symmetrically arranged on the lower crossbeam;

[0017] The upper guide wheel, the middle guide wheel, the anti-slip guide wheel and the lower guide wheel each include a mounting shaft, a friction-reducing bearing, a steel frame and a rubber ring, wherein the friction-reducing bearing is located between the mounting shaft and the steel frame, the rubber ring is sleeved outside the steel frame, and a limiting groove is provided on the circumferential outer wall of the rubber ring, and the rope saw is embedded in the limiting groove;

[0018] The shock-absorbing and buffering structure includes a shock-absorbing spring and a rubber cap. The bottom of the shock-absorbing spring is welded and fixed to the lower crossbeam or the lifting frame. The rubber cap includes a plate-shaped pad body and a cylindrical plug-in portion connected to the middle part of the pad body. The plug-in portion is axially inserted into the shock-absorbing spring, and the rubber cap presses against the top of the shock-absorbing spring.

[0019] Optionally, the lower crossbeam and the lifting frame are both provided with at least two shock-absorbing and buffering structures;

[0020] And / or, a shock-absorbing wooden strip is provided in the area around the shock-absorbing and buffering structure on the lower cross beam, and the height of the shock-absorbing wooden strip is lower than the height of the rubber cap.

[0021] Optionally, the lifting frame is a frame structure, which includes a frame portion with a quadrilateral structure, a mounting beam fixedly connected to the frame portion, and a slider fixedly set on the mounting beam, the sliding rod passes through the guide hole on the slider, and the shock-absorbing and buffering structure is provided on the frame portion.

[0022] Optionally, the middle guide wheel is rotatably connected to the mounting beam, and the anti-slip guide wheel is arranged on the frame portion.

[0023] Optionally, the frame portion includes a front counterweight beam, a rear counterweight beam, a left frame beam, a right frame beam and an upright bracket, wherein:

[0024] The front counterweight beam, the rear counterweight beam, the left frame beam and the right frame beam are each hollow structural members welded from steel plates. The front counterweight beam is welded to the upper surfaces of the front end of the left frame beam and the front end of the right frame beam, and the rear counterweight beam is welded to the upper surfaces of the rear end of the left frame beam and the rear end of the right frame beam. The upright bracket is welded to the upper surface of the front counterweight beam, and the anti-slip guide wheel is rotatably connected to the upright bracket.

[0025] Optionally, both ends of the front counterweight beam and the rear counterweight beam in the length direction are open structures, and a plurality of counterweight steel plates are inserted into the open structure of at least one of the front counterweight beam and the rear counterweight beam;

[0026] The weight of the lifting frame is 120kg-180kg, which is 5 / 8-7 / 8 of the overall weight of the wire saw buffering and shock absorbing device for underwater cutting.

[0027] Optionally, a rubber wheel abutting against the deck is movably connected to the bottom of the diagonal support rod.

[0028] A construction vessel provided by an embodiment of the present invention includes a deck, a ship's side rope saw guide device, and a rope saw buffering and shock-absorbing device for underwater cutting provided by any technical solution of the embodiment of the present invention. The ship's side rope saw guide device includes a guide bracket, a rope-out guide wheel, and a rope-returning guide wheel. The guide bracket is fixed at the edge of the deck, and the rope-out guide wheel and the rope-returning guide wheel are both arranged on the guide bracket. The rope saw passes through the rope saw driving turntable of the underwater cutting machine, the rope-out guide wheel, the workpiece to be cut underwater, and the rope-returning guide wheel, and then passes around the upper guide wheel, the middle guide wheel, the anti-slip guide wheel, and the lower guide wheel.

[0029] Optionally, the guide bracket includes a first bracket and a second bracket, the first bracket and the second bracket are spaced apart on the deck close to the ship's side, the number of the rope-out guide wheels is two and they are rotatably connected to the first bracket at different heights, the number of the rope-return guide wheels is four, two of the rope-return guide wheels are rotatably connected to the second bracket at different heights, and the other two rope-return guide wheels are rotatably connected to the first bracket at different heights, the axis center line of the rope-return guide wheel at a higher position on the first bracket is perpendicular to the axis center line of the rope-return guide wheel at a lower position; the axis center line of the rope-return guide wheel at a higher position on the second bracket is perpendicular to the axis center line of the rope-return guide wheel at a lower position.

[0030] Any of the above technical solutions provided by the embodiments of the present invention produces at least the following technical effects:

[0031] The rope saw buffering and shock-absorbing device for underwater cutting provided by the present invention, the coordinated operation of the lifting frame, the rope saw guide wheel, the rope saw and the slide bar can ensure that during the sawing operation, even if the surge waves drive the construction vessel up and down, the tension of the rope saw remains basically constant. When the surge waves drive the construction vessel up, the distance between the deck of the construction vessel and the workpiece on the seabed (such as a reinforced concrete caisson) increases under the action of the waves. At this time, the rope saw tends to be in a tensioned state, and the rope saw drives the lifting frame (equivalent to a counterweight block) to slide upward along the slide bar through the rope saw guide wheel, so that the tension on the rope saw is converted into kinetic energy of the lifting frame rising and is released, thereby preventing it from being over-tensioned; when the construction vessel sinks, the distance between the deck of the construction vessel and the workpiece on the seabed decreases under the action of the waves. At this time, the rope saw tends to be in a relaxed state, and the lifting frame is under the action of gravity. The wire rope guide wheel slides downward along the slide bar, and the gravity of the lifting frame compensates for the reduced tension of the wire rope, preventing it from being excessively loose. The real-time sliding of the lifting frame ensures that the tension of the wire rope remains basically constant, while avoiding the phenomenon of the wire rope being stuck due to accumulation and deflection when the wire rope is loose. This solves the problem of the wire rope being subjected to drastic changes in tension as the construction vessel rises and falls with the waves, thereby reducing the impact of excessive waves on the cutting operation, improving the stability of the wire rope cutting operation, and solving the problem of wire rope being stuck and equipment being damaged, thereby ensuring cutting efficiency. At the same time, in order to cope with the situation where the construction vessel rises and falls too quickly with the waves, and the lifting frame suddenly rises or falls, causing damage to the lifting frame and the device, and posing a safety risk, a shock-absorbing and buffering structure is provided above and below the lifting frame to offset the destructive force caused by the sudden rise and fall of the lifting frame, effectively protecting the device, increasing its service life, improving the overall efficiency of construction, and ensuring operational safety.

[0032] The advantages of the technical solution provided by the present invention include at least:

[0033] 1. Strong applicability: The present invention can be applied to sawing operations in different waters and under different degrees of swells, reducing the impact of bad weather on construction, and ensuring stable rope sawing operations;

[0034] 2. High construction efficiency: The present invention effectively solves the impact of surge on cutting operations, greatly reduces the number of wire saw jams and equipment damage, and greatly improves cutting efficiency.

[0035] 3. Good economic benefits: The present invention improves construction efficiency while reducing the operating time of personnel and ships and lowering construction costs.

[0036] 4. High safety: The use of the present invention reduces the number of times the rope saw gets stuck, shortens the underwater operation time of divers, and reduces the risk of underwater construction. At the same time, by adopting a shock-absorbing and buffering structure, it avoids the construction safety risks that may be caused by sudden damage to the equipment, and the overall safety of the construction process is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Those skilled in the art may better understand the technical effects of the present invention through the following drawings, wherein:

[0038] Figure 1 This is a schematic front view of a wire saw buffering and shock absorbing device for underwater cutting provided in one embodiment of the present invention (only a partial section of the wire saw is shown in the figure).

[0039] Figure 2 This is a left side schematic diagram of a wire saw buffering and shock absorbing device for underwater cutting provided in one embodiment of the present invention (only a partial section of the wire saw is shown in the figure).

[0040] Figure 3 A schematic diagram of the connection relationship between a wire saw buffering and shock absorbing device for underwater cutting, an underwater cutting machine, and a wire saw provided in one embodiment of the present invention.

[0041] Figure 4 A schematic diagram of the connection relationship between a wire saw buffer and shock absorbing device for underwater cutting, an underwater cutting machine, and a wire saw provided in accordance with another embodiment of the present invention.

[0042] Figure 5 This is a schematic diagram of a shock absorbing and buffering structure of a wire saw buffering and shock absorbing device for underwater cutting provided in another embodiment of the present invention.

[0043] Figure 6 A schematic diagram of the shock absorbing and buffering structure of a wire saw buffering and shock absorbing device for underwater cutting provided by an embodiment of the present invention.

[0044] Figure 7 A schematic diagram of the connection relationship between the upright bracket and the anti-slip guide wheel of the rope saw buffer and shock absorption device for underwater cutting provided by an embodiment of the present invention.

[0045] Figure 8 A schematic diagram of the connection between the guide bracket of the wire saw buffering and shock absorbing device for underwater cutting provided by an embodiment of the present invention and the wire saw;

[0046] Markings in the figure: 1. Main support; 11. Upper crossbeam; 12. Lower crossbeam; 13. Connecting beam; 14. Diagonal support rod; 141. Rubber wheel; 2. Sliding rod; 3. Wire saw guide wheel; 31. Upper guide wheel; 32. Middle guide wheel; 33. Anti-slip guide wheel; 34. Lower guide wheel; 4. Shock-absorbing and buffering structure; 41. Shock-absorbing spring; 42. Rubber cap; 5. Lifting frame; 51. Frame; 511. Front counterweight beam. 512. Rear counterweight beam; 513. Left frame beam; 514. Right frame beam; 515. Vertical bracket; 516. Anti-slip baffle; 52. Mounting crossbeam; 53. Slider; 6. Deck; 7. Ship's side rope saw guide device; 71. Guide bracket; 711. First bracket; 712. Second bracket; 72. Rope outgoing guide wheel; 73. Rope returning guide wheel; 8. Rope saw; 9. Rope saw drive turntable; 10. Reinforced concrete caisson. DETAILED DESCRIPTION

[0047] The following is combined with the above Figures 1-8 The preferred implementation scheme and various optional implementation schemes provided by the embodiments of the present invention are described in more detail.

[0048] like Figures 1-8 As shown, an embodiment of the present invention provides a wire saw buffering and shock absorbing device for underwater cutting, comprising a main support 1, a slide bar 2, a wire saw guide wheel 3, a shock absorbing and buffering structure 4, and a lifting frame 5, wherein:

[0049] The main support 1 is fixedly connected to the deck 6 of the construction vessel;

[0050] The main support 1 includes an upper crossbeam 11, a lower crossbeam 12, a connecting beam 13 and a diagonal brace 14; the top of the diagonal brace 14 and the upper crossbeam 11 are fixedly connected to the top of the slide bar 2, one end of the connecting beam 13 and the lower crossbeam 12 are fixedly connected to the bottom of the slide bar 2, and the other end of the connecting beam 13 is fixedly connected to the bottom of the diagonal brace 14;

[0051] The slide bar 2 passes through the lifting frame 5, and a shock-absorbing and buffering structure 4 is provided on both the lower crossbeam 12 and the lifting frame 5. The lifting frame 5 can slide upward along the slide bar 2 to a position where the shock-absorbing and buffering structure 4 on the lifting frame 5 contacts the upper crossbeam 11, and can slide downward to a position where the lifting frame 5 contacts the shock-absorbing and buffering structure 4 on the lower crossbeam 12.

[0052] The wire saw guide wheel 3 includes a plurality of upper guide wheels 31, a plurality of middle guide wheels 32, a plurality of anti-slip guide wheels 33, and a plurality of lower guide wheels 34. The upper guide wheels 31 are arranged on the upper crossbeam 11; the middle guide wheels 32 are arranged at the bottom of the lifting frame 5; the anti-slip guide wheels 33 are arranged at the top of the lifting frame 5, and the lower guide wheels 34 are arranged on the lower crossbeam 12.

[0053] The rope saw 8 for underwater cutting is connected end to end to form a ring. After the rope saw 8 passes around the rope saw drive turntable 9 and the anti-slip guide wheel 33 of the underwater cutting machine and passes through the workpiece to be cut underwater (in this embodiment, the reinforced concrete caisson 10), it passes around at least part of the upper guide wheel 31, at least part of the middle guide wheel 32, and at least part of the lower guide wheel 34. When the rope saw drive turntable 9 of the underwater cutting machine rotates, it can drive the rope saw 8 for underwater cutting to rotate, saw the workpiece, and drive the anti-slip guide wheel 33, upper guide wheel 31, middle guide wheel 32, and lower guide wheel 34 bypassed by the rope saw 8 to rotate; the specific number and specific path of the rope saw 8 bypassing the upper guide wheel 31, middle guide wheel 32, and lower guide wheel 34 can be flexibly selected and adjusted according to the actual length of the rope saw 8 and the distance between the workpiece to be cut and the deck 6.

[0054] When the distance between the deck 6 of the construction ship and the workpiece is enlarged by the action of waves, the rope saw 8 used for underwater cutting can pull the middle guide wheel 32 that the rope saw 8 bypasses and drive the lifting frame 5 to slide upward along the slide rod 2 through the middle guide wheel 32. When the distance between the deck 6 of the construction ship and the workpiece is reduced by the action of waves, the lifting frame 5 slides downward along the slide rod 2 under the action of gravity.

[0055] The rope saw buffering and shock absorbing device for underwater cutting provided by the present invention, the coordinated operation of the lifting frame 5, the rope saw guide wheel 3, the rope saw 8 and the slide bar 2 can ensure that during the sawing operation, even if the surge drives the construction vessel to fluctuate up and down, the tightness of the rope saw 8 remains basically constant. When the construction vessel is upwelled by the waves, the distance between the deck 6 of the construction vessel and the workpiece on the seabed (such as a reinforced concrete caisson) increases under the action of the waves. At this time, the rope saw 8 tends to be in a tensioned state, and the rope saw 8 drives the lifting frame 5 (equivalent to a counterweight block) to slide upward along the slide bar 2 through the rope saw guide wheel 3, so that the tension on the rope saw is released by being converted into kinetic energy of the lifting frame rising, thereby preventing it from being over-tensioned; when the construction vessel sinks, the distance between the deck 6 of the construction vessel and the workpiece on the seabed decreases under the action of the waves. At this time, the rope saw 8 tends to be in a relaxed state, and the lifting frame 5 slides downward along the slide bar 2 through the rope saw guide wheel 3 under the action of gravity. The gravity of the lifting frame 5 compensates for the reduced tension of the rope saw, thereby preventing it from being over-relaxed. In this way, the real-time sliding of the lifting frame 5 ensures that the tightness of the rope saw 8 remains basically constant, and at the same time avoids the accumulation and deflection of the rope saw 8 when it is relaxed, thereby causing the saw to be stuck.

[0056] As an optional embodiment, the upper guide wheels 31 are symmetrically arranged on the upper crossbeam 11; the middle guide wheels 32 are symmetrically arranged on the bottom of the lifting frame 5; the anti-slip guide wheels 33 are arranged on the top of the lifting frame 5, and the lower guide wheels 34 are symmetrically arranged on the lower crossbeam 12;

[0057] The upper guide wheel 31, the middle guide wheel 32, the anti-slip guide wheel 33 and the lower guide wheel 34 each include a mounting shaft, a friction-reducing bearing, a steel frame and a rubber ring. The friction-reducing bearing is located between the mounting shaft and the steel frame. The rubber ring is sleeved outside the steel frame. A limiting groove is provided on the circumferential outer wall of the rubber ring. The rope saw 8 for underwater cutting is embedded in the limiting groove.

[0058] The shock-absorbing and buffering structure 4 includes a shock-absorbing spring 41 and a rubber cap 42. The bottom of the shock-absorbing spring 41 is welded and fixed to the lower crossbeam 12 or the lifting frame 5. The rubber cap 42 includes a plate-shaped pad body and a cylindrical plug-in portion connected to the middle part of the pad body. The plug-in portion is axially inserted into the shock-absorbing spring 41, and the rubber cap 42 presses against the top of the shock-absorbing spring 41.

[0059] The upper guide wheel 31, the anti-slip guide wheel 33 and the lower guide wheel 34 guide and support the rope saw 8. The middle guide wheel 32 not only guides and supports but also transmits the tension of the rope saw 8 to the lifting frame 5, thereby maintaining the tension of the rope saw 8 basically constant through the lifting movement of the lifting frame 5.

[0060] The steel skeleton can ensure the strength and load capacity of the upper guide wheel 31 , the middle guide wheel 32 , the anti-slip guide wheel 33 and the lower guide wheel 34 , and the rubber ring can prevent the rope saw 8 from being worn and protect the rope saw 8 .

[0061] The rubber cap 42 can improve the shock absorption and buffering effect of the shock absorption spring 41 , and prevent the end of the shock absorption spring 41 from scratching the lower crossbeam 12 or the lifting frame 5 .

[0062] As an optional embodiment, both the lower crossbeam 12 and the lifting frame 5 are equipped with at least two shock-absorbing and buffering structures 4. Alternatively, the area surrounding the shock-absorbing and buffering structures 4 on the lower crossbeam 12 is provided with shock-absorbing wooden strips, the height of which is lower than that of the rubber caps 42. Multiple shock-absorbing and buffering structures 4 can ensure a more ideal shock absorption effect. The shock-absorbing wooden strips can assist the shock-absorbing spring 41 in providing support, cushioning, and shock absorption, thereby extending the service life of the shock-absorbing spring 41.

[0063] As an optional embodiment, the lifting frame 5 is a frame structure, which includes a frame portion 51 with a quadrilateral structure, a mounting beam 52 fixedly connected to the frame portion 51, and a slider 53 fixedly set on the mounting beam 52. The slide rod 2 passes through the guide hole on the slider 53, and a shock-absorbing buffer structure 4 is provided on the frame portion 51.

[0064] The lifting frame 5 of the frame structure is convenient to assemble and manufacture, and the matching structure of the slider 53 and the slide rod 2 can ensure that the sliding direction of the frame structure is more accurate.

[0065] As an alternative embodiment, the central guide wheel 32 is rotatably connected to the mounting crossbeam 52, and the anti-slip guide wheel 33 is mounted on the frame portion 51. The mounting crossbeam 52 is located in the center of the lifting frame 5. Placing the central guide wheel 32 on the mounting crossbeam 52 not only increases installation space but also provides greater stability for the entire device. The anti-slip guide wheel 33 can also raise the height of the wire saw 8, preventing interference with other components of the lifting frame 5.

[0066] As an alternative embodiment, the frame portion 51 includes a front counterweight beam 511, a rear counterweight beam 512, a left frame beam 513, a right frame beam 514, and an upright bracket 515. The front counterweight beam 511, the rear counterweight beam 512, the left frame beam 513, and the right frame beam 514 are each hollow structural members welded from steel plates. The front counterweight beam 511 is welded to the upper surfaces of the front ends of the left frame beam 513 and the right frame beam 514. The rear counterweight beam 512 is welded to the upper surfaces of the rear ends of the left frame beam 513 and the right frame beam 514. The upright bracket 515 is welded to the upper surface of the front counterweight beam 511. The anti-slip guide wheel 33 is rotatably connected to the upright bracket 515. The upright bracket 515 is also provided with an anti-slip blocker 516 to prevent the rope saw 8 from slipping out.

[0067] The above structure has the advantages of being easy to assemble, connect and carry, and easy to add counterweight.

[0068] As an optional embodiment, both ends of the front counterweight beam 511 and the rear counterweight beam 512 in the length direction have open structures, and a plurality of counterweight steel plates are inserted into the open structure of at least one of the front counterweight beam 511 and the rear counterweight beam 512; the weight of the lifting frame 5 is 120kg-180kg, and the weight of the lifting frame 5 is 5 / 8~7 / 8 of the overall weight of the rope saw buffer shock absorption device for underwater cutting.

[0069] The front counterweight beam 511 and the rear counterweight beam 512 are the main components of the lifting frame 5, and the main weight of the lifting frame 5 comes from the front counterweight beam 511 and the rear counterweight beam 512. The main weight of the entire wire saw buffer and shock absorption device for underwater cutting comes from the lifting frame 5, thereby better achieving the traction and dragging of the wire saw 8 through the lifting frame 5, thereby more ideally ensuring that the wire saw 8 is subjected to constant tension.

[0070] As an optional embodiment, a rubber wheel 141 is movably connected to the bottom of the diagonal support rod 14 and abuts the deck 6. The rubber wheel 141 can not only further improve the shock absorption effect of the wire saw buffering and shock absorbing device for underwater cutting of the present invention, but also facilitate transportation during installation and disassembly of the wire saw buffering and shock absorbing device for underwater cutting of the present invention.

[0071] The construction vessel provided by an embodiment of the present invention includes a deck 6, a ship's side rope saw guide device 7, and a rope saw buffering and shock-absorbing device for underwater cutting provided by any technical solution of the present invention. The ship's side rope saw guide device 7 includes a guide bracket 71, a rope-out guide wheel 72, and a rope-returning guide wheel 73. The guide bracket 71 is fixed at the edge of the deck 6. The rope-out guide wheel 72 and the rope-returning guide wheel 73 are both arranged on the guide bracket 71. The rope saw 8 used for underwater cutting passes through the rope saw drive turntable 9 of the underwater cutting machine, the rope-out guide wheel 72, the workpiece to be cut underwater, and the rope-returning guide wheel 73, and then passes around the upper guide wheel 31, the middle guide wheel 32, the anti-slip guide wheel 33, and the lower guide wheel 34.

[0072] The function of the ship's side wire saw guide device 7 is to, firstly, keep the wire saw 8 away from the deck 6 to prevent the wire saw 8 from colliding with and damaging the ship's side; secondly, to change the extension direction of the wire saw 8 according to the position and needs of the workpiece to be cut, ensuring that the extension direction and position of the wire saw 8 meet the cutting needs.

[0073] As an optional embodiment, the guide bracket 71 includes a first bracket 711 and a second bracket 712. The first bracket 711 and the second bracket 712 are spaced apart on the deck 6 close to the ship's side. There are two rope-out guide wheels 72 and they are rotatably connected to the first bracket 711 at different heights. There are four rope-return guide wheels 73. Two rope-return guide wheels 73 are rotatably connected to the second bracket 712 at different heights. The other two rope-return guide wheels 73 are rotatably connected to the first bracket 711 at different heights. The axis of the rope-return guide wheel 73 with a higher position on the first bracket 711 is perpendicular to the axis of the rope-return guide wheel 73 with a lower position; the axis of the rope-return guide wheel 73 with a higher position on the second bracket 712 is perpendicular to the axis of the rope-return guide wheel 73 with a lower position.

[0074] The rope return guide wheels 73 with mutually perpendicular axis lines can change the extension direction of the rope saw 8 from horizontal to longitudinal, thereby improving the flexibility of the installation position selection of the rope saw buffering and shock absorbing device for underwater cutting on the deck 6 of the present invention.

[0075] The above technical solutions are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A wire saw buffering and shock absorbing device for underwater cutting, characterized in that: It includes a main support, a slide bar, a wire saw guide wheel, a shock-absorbing and buffering structure, and a lifting frame, wherein: The main support is fixedly connected to the deck of the construction vessel; The main support comprises an upper crossbeam, a lower crossbeam, a connecting beam and an oblique support rod; the top of the oblique support rod and the upper crossbeam are fixedly connected to the top of the slide rod, one end of the connecting beam and the lower crossbeam are fixedly connected to the bottom of the slide rod, and the other end of the connecting beam is fixedly connected to the bottom of the oblique support rod; The slide bar passes through the lifting frame, and the lower cross beam and the lifting frame are both provided with a shock absorbing and buffering structure; the lifting frame can slide upward along the slide bar to a position where the shock absorbing and buffering structure on the lifting frame touches the upper cross beam, and can slide downward to a position where the lifting frame touches the shock absorbing and buffering structure on the lower cross beam; The rope saw guide wheel includes a plurality of upper guide wheels, a plurality of middle guide wheels and a plurality of lower guide wheels, wherein the upper guide wheels are arranged on the upper crossbeam; the middle guide wheels are arranged at the bottom of the lifting frame; and the lower guide wheels are arranged on the lower crossbeam; The rope saw for underwater cutting is connected end to end to form a ring, the rope saw passes around the rope saw driving turntable of the underwater cutting machine and passes through the workpiece to be cut underwater, and then passes around at least part of the upper guide wheel, at least part of the middle guide wheel, and at least part of the lower guide wheel. When the rope saw driving turntable of the underwater cutting machine rotates, it can drive the rope saw to rotate, saw the workpiece, and drive the upper guide wheel, the middle guide wheel, and the lower guide wheel that the rope saw has passed around to rotate; When the distance between the deck of the construction ship and the workpiece is enlarged due to the action of waves, the rope saw can pull the middle guide wheel bypassed by the rope saw and drive the lifting frame to slide upward along the sliding rod through the middle guide wheel; when the distance between the deck of the construction ship and the workpiece is reduced due to the action of waves, the lifting frame slides downward along the sliding rod under the action of gravity.

2. The wire saw buffering and shock absorbing device for underwater cutting according to claim 1, characterized in that: The rope saw guide wheel also includes a plurality of anti-slip guide wheels, and the anti-slip guide wheels are arranged on the top of the lifting frame. The rope saw bypasses the rope saw driving turntable of the underwater cutting machine and first bypasses the rope saw guide wheel before entering underwater to pass through the workpiece. When the rope saw drives the turntable to rotate, the anti-slip guide wheel bypassed by the rope saw can be driven to rotate; The upper guide wheels are symmetrically arranged on the upper crossbeam; the middle guide wheels are symmetrically arranged on the bottom of the lifting frame; the anti-slip guide wheels are arranged on the top of the lifting frame, and the lower guide wheels are symmetrically arranged on the lower crossbeam; The upper guide wheel, the middle guide wheel, the anti-slip guide wheel and the lower guide wheel each include a mounting shaft, a friction-reducing bearing, a steel frame and a rubber ring, the friction-reducing bearing is between the mounting shaft and the steel frame, the rubber ring is sleeved outside the steel frame, a limiting groove is provided on the circumferential outer wall of the rubber ring, and the rope saw is embedded in the limiting groove; The shock-absorbing and buffering structure includes a shock-absorbing spring and a rubber cap. The bottom of the shock-absorbing spring is welded and fixed to the lower cross beam or the lifting frame. The rubber cap includes a plate-shaped cushion body and a cylindrical plug-in portion connected to the middle portion of the cushion body. The plug-in portion is axially inserted into the shock-absorbing spring, and the rubber cap presses against the top of the shock-absorbing spring.

3. The wire saw buffering and shock absorbing device for underwater cutting according to claim 2, characterized in that: The lower cross beam and the lifting frame are both provided with at least two shock absorbing and buffering structures; And / or, a shock-absorbing wooden strip is arranged in the area around the shock-absorbing and buffering structure on the lower cross beam, and the height of the shock-absorbing wooden strip is lower than the height of the rubber cap.

4. The wire saw buffering and shock absorbing device for underwater cutting according to claim 3, characterized in that: The lifting frame is a frame structure, which includes a frame part with a quadrilateral structure, a mounting beam fixedly connected to the frame part, and a slider fixedly arranged on the mounting beam, the slide rod passes through the guide through hole on the slider, and the shock-absorbing and buffering structure is arranged on the frame part.

5. The wire saw buffering and shock absorbing device for underwater cutting according to claim 4, characterized in that: The middle guide wheel is rotatably connected to the mounting crossbeam, and the anti-slip guide wheel is arranged on the frame portion.

6. The wire saw buffering and shock absorbing device for underwater cutting according to claim 5, characterized in that: The frame part includes a front counterweight beam, a rear counterweight beam, a left frame beam, a right frame beam and a vertical bracket, wherein: The front counterweight beam, the rear counterweight beam, the left frame beam and the right frame beam are each hollow structural members welded from steel plates; the front counterweight beam is welded to the upper surfaces of the front end of the left frame beam and the front end of the right frame beam; the rear counterweight beam is welded to the upper surfaces of the rear end of the left frame beam and the rear end of the right frame beam; the vertical bracket is welded to the upper surface of the front counterweight beam; and the anti-slip guide wheel is rotatably connected to the vertical bracket.

7. The wire saw buffering and shock absorbing device for underwater cutting according to claim 6, characterized in that: Both ends of the front counterweight beam and the rear counterweight beam in the length direction are open structures, and a plurality of counterweight steel plates are inserted into the open structure of at least one of the front counterweight beam and the rear counterweight beam; The weight of the lifting frame is 120kg-180kg, and the weight of the lifting frame is 5 / 8-7 / 8 of the overall weight of the rope saw buffering and shock absorbing device for underwater cutting.

8. The wire saw buffering and shock absorbing device for underwater cutting according to claim 6, characterized in that: A rubber wheel abutting against the deck is movably connected to the bottom of the diagonal support rod.

9. A construction vessel, characterized in that: It includes a deck, a ship's side rope saw guide device and a rope saw buffering and shock absorbing device for underwater cutting as described in any one of claims 7-8, wherein the ship's side rope saw guide device includes a guide bracket, a rope-out guide wheel and a rope-returning guide wheel, the guide bracket is fixed at the edge of the deck, the rope-out guide wheel and the rope-returning guide wheel are both arranged on the guide bracket, and the rope saw passes through the rope saw driving turntable of the underwater cutting machine, the rope-out guide wheel, the workpiece to be cut underwater and the rope-returning guide wheel, and then bypasses the upper guide wheel, the middle guide wheel, the anti-slip guide wheel and the lower guide wheel.

10. The construction vessel according to claim 9, characterized in that: The guide bracket includes a first bracket and a second bracket, the first bracket and the second bracket are arranged at intervals on the deck close to the ship's side, the number of the rope-out guide wheels is two and they are rotatably connected to the first bracket at different heights, the number of the rope-return guide wheels is four, two of the rope-return guide wheels are rotatably connected to the second bracket at different heights, and the other two rope-return guide wheels are rotatably connected to the first bracket at different heights, the axis line of the rope-return guide wheel with a higher position on the first bracket is perpendicular to the axis line of the rope-return guide wheel with a lower position; the axis line of the rope-return guide wheel with a higher position on the second bracket is perpendicular to the axis line of the rope-return guide wheel with a lower position.

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