Jig special for cutting off D-shaped lifting lug on vertical keel panel of bulk cargo ship

Abstract

The invention relates to the technical field of ships, in particular to a special jig for cutting off a D-shaped lifting lug on a vertical keel panel of a bulk cargo ship, and a jig main body comprises a lifting lug fixing module, a keel panel clamping module and an automatic adjusting module; the fixed lifting lug module comprises an L-shaped bearing square pipe, a backward movement preventing assembly, an inclined square pipe and a lateral movement preventing bolt. U-shaped round steel in the backward movement preventing assembly is welded to the upper ends of the inclined square pipes on the two sides; the anti-sidesway bolts are symmetrically arranged at the tail end of the inclined square tube; the clamping keel panel module comprises a main body steel plate, adjustable clamps are installed in sliding grooves in the two sides of the main body steel plate, and each adjustable clamp comprises a sliding base and a panel contact block and is fixedly connected with a keel panel through an adjusting bolt. The automatic adjusting module comprises an angle sensor and a controller, and the controller is in signal connection with the angle sensor and the micro electric push rod. According to the D-shaped lifting lug cutting device, the cutting efficiency and stability of the D-shaped lifting lug are improved, and meanwhile the operation safety is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of ship technology, and in particular to a special jig for cutting off a D-shaped lifting lug on a vertical keel panel of a bulk carrier. Background Art

[0002] During the shipbuilding process, when bulk carriers are loaded in sections, temporary D-shaped lifting lugs need to be welded on the vertical keel panels as lifting support points. After loading is completed, the lifting lugs need to be cut off for subsequent outfitting operations. The traditional lifting lug cutting operation has the following technical pain points:

[0003] The first point is that the fixing method is backward: the operator needs to manually operate on the scaffolding board and use the wire rope to wrap around the lifting lug for temporary fixation, which has the risk of wire rope slipping and poor stability in high-altitude operations;

[0004] The second point is the lack of positioning accuracy: the existing fixtures mostly use a universal mechanical clamping structure that cannot adapt to the inclination changes of D-shaped hanging ears and rib panels of different sizes, and the hanging ears are easily offset due to vibration during cutting;

[0005] The third is the lack of safety protection: the splashing slag and high-temperature deformation of the lifting lug during the cutting process may cause the wire rope to break, and the existing technology lacks a dynamic compensation mechanism for the cutting reaction force.

[0006] The existing lifting lug cutting tools have three major bottlenecks: low fixing reliability, poor adaptability to working conditions and high safety risks. It is urgent to develop a special fixture specifically for the D-type lifting lug of the vertical rib panel, which has adaptability and multiple protections. Summary of the invention

[0007] In order to overcome the problems existing in the prior art, the present application provides a special jig for cutting off the D-shaped lifting lugs on the vertical keel panel of a bulk carrier.

[0008] The present application provides a special jig for cutting off the D-shaped lifting lug on the vertical keel panel of a bulk carrier, which adopts the following technical solution:

[0009] A special jig for cutting off D-shaped lifting ears on the vertical keel panel of a bulk carrier comprises: a jig body, the jig body comprises a fixing lifting ear module, a keel panel clamping module and an automatic adjustment module; a fixing lifting ear module, the fixing lifting ear module comprises an L-shaped supporting square tube, the horizontal section free end of the L-shaped supporting square tube is provided with an anti-rearward movement component, the vertical section of the L-shaped supporting square tube is symmetrically welded with an inclined square tube, the inclined square tube forms an obtuse angle with the horizontal section and an anti-lateral movement bolt is installed at the end; the anti-lateral movement component is a U-shaped round steel, the opening direction of which forms an obtuse angle with the supporting surface of the L-shaped supporting square tube, and the U-shaped round steel is welded to the upper ends of the inclined square tubes on both sides; the anti-lateral movement bolts are symmetrically arranged at the ends of the inclined square tubes, and the bolt axes intersect perpendicularly with the center line of the L-shaped supporting square tube; a keel panel clamping module, ... The rib panel module includes a main steel plate, the middle part of which is welded to the side of the L-shaped supporting square tube, sliding grooves are provided on both sides of the main steel plate, and adjustable clamps are installed in the sliding grooves. The adjustable clamps are fixedly connected to the rib panel through adjusting bolts; the adjustable clamps include a sliding base and a panel contact block, the sliding base and the sliding groove are clearance-matched, and a threaded groove is provided on the panel contact block and cooperates with the adjusting bolts; an automatic adjustment module, the automatic adjustment module includes an angle sensor and a controller installed at the connection between the fixed hanging ear module and the clamping rib panel module, the angle sensor is used to monitor the angle information between the fixture and the rib panel in real time, a micro electric push rod is provided on the side of the fixture body close to the rib panel, and the controller is connected to the angle sensor and the micro electric push rod signal.

[0010] By adopting the above technical solution, the L-shaped supporting square tube is used to support the D-shaped lifting ear. The U-shaped round steel anti-backward movement component at the free end of the horizontal section prevents the lifting ear from moving backward. The inclined square tube welded to the vertical section of the L-shaped supporting square tube has anti-lateral movement bolts installed at its end that are symmetrically arranged and the bolt axis intersects vertically with the center line of the L-shaped supporting square tube, which can prevent the lifting ear from moving sideways, thereby achieving stable fixation of the D-shaped lifting ear. The middle part of the main steel plate is welded to the side of the L-shaped supporting square tube, and sliding grooves are provided on both sides. The adjustable fixture in the sliding groove is fixedly connected to the dragon tendon panel through adjusting bolts. The sliding base of the adjustable fixture is matched with the sliding groove clearance, and can be moved in the sliding groove and fixed in a suitable position according to the size of the dragon tendon panel. The threaded groove on the panel contact block is matched with the adjusting bolt. By turning the adjusting bolt, the panel contact block presses the dragon tendon panel, thereby firmly connecting the fixture body to the dragon tendon panel. The angle sensor installed at the connection between the fixed lifting ear module and the clamping dragon tendon panel module monitors the angle information between the fixture and the dragon tendon panel in real time, and feeds the information back to the controller. When the angle deviates, the controller receives the signal from the angle sensor and sends a command to the micro electric push rod, which then retracts and adjusts the angle of the fixture body to keep a suitable angle with the rib panel to meet the requirements of cutting the D-type lifting lug.

[0011] Preferably, a tightening structure is installed on one side of the fixed lifting ear module close to the rib panel, and the tightening structure includes an adjusting top plate installed on the inner side of the main steel plate, wherein the adjusting top plate is inclined from the center of the main steel plate to both sides, and the adjusting top plate is rotatably connected to the main steel plate, and the free end of the adjusting plate is rotatably connected to a tightening hydraulic cylinder, and the other end of the tightening hydraulic cylinder is rotatably installed on the main steel plate.

[0012] Preferably, an auxiliary support frame is fixedly installed below the main steel plate, including a support rod frame inclined from the bottom of the main steel plate toward the rib panel, wherein the micro electric push rod is rotatably connected to the free end of the support rod frame.

[0013] By adopting the above technical solution, when the fixed lifting ear module, the clamping dragon tendon panel module and the automatic adjustment module in the fixture body are installed on the dragon tendon panel, the adjusting top plate is driven by the tightening hydraulic cylinder to rotate around the axis, and its inclined surface is pressed against the dragon tendon panel. When the tightening hydraulic cylinder applies thrust, the adjusting top plate converts the horizontal thrust into a vertical force component, and cooperates with the panel contact block to achieve symmetrical clamping of the dragon tendon panel through a two-way clamping action. At the same time, the support rod frame and the micro electric push rod form a triangular stable structure. The push rod can dynamically adjust the contact angle between the fixture body and the dragon tendon panel by telescoping, eliminating the moment imbalance caused by panel installation deviation, improving the uniformity of clamping force distribution, and avoiding the displacement of the lifting ear caused by local stress concentration.

[0014] Preferably, the contact surface between the panel contact block and the rib panel is provided with an adaptive compensation mechanism, including pressure sensors distributed in an array on the contact surface, and a honeycomb air chamber structure is filled under the pressure sensor, wherein the honeycomb air chamber structure is connected to a compressed air source via a multi-channel solenoid valve group.

[0015] Preferably, a single air chamber in the honeycomb air chamber structure has a diameter of 2-5 mm and a depth of 5-10 mm. A micro bellows air cushion is built into the air chamber. The micro bellows air cushion is made of silicone material, and adjacent air chambers are connected through air guide grooves.

[0016] Preferably, the pressure sensor and the multi-channel solenoid valve group are both connected to the controller signal, and a temperature compensation module is embedded in the outer wall of the panel contact block. The temperature compensation module includes a temperature sensor and a copper heat pipe array distributed in an annular manner around the honeycomb air chamber structure.

[0017] Preferably, a dynamic compensation algorithm is preset in the controller:

[0018] When the pressure value P in a certain area is detected to be greater than the set threshold value P0, the corresponding solenoid valve is opened to release the pressure;

[0019] When P<P0, 0.2-0.5MPa compressed air is filled into the air cushion to achieve local bulge;

[0020] The controller dynamically corrects the zero drift of the pressure sensor according to the temperature data. The correction formula is:

[0021] ΔP=K×(T-T0),

[0022] In the formula, K = 0.05N / °C, T0 = 25°C calibration temperature.

[0023] By adopting the above technical solution, the pressure sensor array monitors the contact pressure distribution between the contact block and the rib panel in real time. If the uneven surface of the panel causes local high pressure, when the pressure in a certain area exceeds the threshold value P0, the controller opens the corresponding solenoid valve to decompress the air cushion in the area and shrink it, and the height of the air cushion decreases to avoid overpressure damage to the panel; when the pressure is insufficient, the air cushion is inflated to expand the bellows and fill the concave area of ​​the panel. The temperature compensation module balances the temperature field of the contact block through the copper heat pipe array, and eliminates temperature drift by combining the correction formula ΔP=K(T-T0), ensuring that the pressure detection accuracy is stable within the set range.

[0024] Preferably, a vibration suppression structure is embedded in the L-shaped supporting square tube, comprising piezoelectric ceramic sheets arranged at intervals along the length direction of the L-shaped supporting square tube, and a shear thickening liquid is filled between the piezoelectric ceramic sheets.

[0025] Preferably, a reinforcing rib structure is provided inside the horizontal section of the L-shaped supporting square tube, wherein the reinforcing rib structure is cross-distributed, and the thickness of the reinforcing rib is greater than the thickness of the wall of the L-shaped supporting square tube.

[0026] By adopting the above technical solution, when the vibration wave generated during the cutting process is transmitted to the L-shaped supporting square tube, the piezoelectric ceramic sheet converts the mechanical vibration into an electrical signal. After the controller analyzes the vibration frequency, it generates a cancellation signal through phase reversal, causing the piezoelectric ceramic sheet to vibrate in the opposite direction. At the same time, the viscosity of the filled shear thickening fluid increases sharply when subjected to high-frequency impact, dissipating more than 80% of the vibration energy. The cross-shaped reinforcement ribs increase the bending section modulus of the square tube and suppress the structural resonance caused by the reaction force of cutting.

[0027] Preferably, the U-shaped round steel in the anti-backward movement component and the supporting surface of the L-shaped supporting square tube are at an angle of 150-160°, wherein the surface of the U-shaped round steel is coated with an anti-slip rubber layer, and the anti-slip rubber layer is staggered with hemispherical protrusions.

[0028] By adopting the above technical solution, the U-shaped round steel abuts against the back of the lifting lug at an angle of 150-160°, and the hemispherical protrusion of the anti-slip rubber layer is embedded in the surface of the lifting lug, producing a mechanical interlocking effect. When the lifting lug moves backward due to the cutting force, the protrusion deforms to produce resistance, and with the restraining structure of the U-shaped structure, the sliding friction of the traditional wire rope fixation is converted into static friction, greatly improving the anti-slip resistance.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. The fixture body in this application has significant advantages in fixing and adjusting. The fixed ear module uses an L-shaped supporting square tube with an anti-rearward movement component and an anti-lateral movement bolt to firmly limit the displacement of the D-type ear from the rear and side directions; the clamping dragon bar panel module uses the sliding groove and adjustable clamp on the main steel plate, and the adjustment bolt makes the panel contact block firmly press the dragon bar panel. The two are closely combined to ensure the stable connection between the fixture and the ear and dragon bar panel during the cutting operation. The automatic adjustment module uses an angle sensor to monitor the angle of the fixture and the dragon bar panel in real time. The controller accurately controls the micro electric push rod based on this, and automatically adjusts the angle to adapt to different working conditions to ensure cutting accuracy. The tightening structure further strengthens the connection between the fixture and the dragon bar panel from the side, and the auxiliary support frame provides additional support to stabilize the working state of the fixture;

[0031] 2. The fixture body in this application performs well in terms of structural protection and adaptability. The adaptive compensation mechanism of the panel contact block relies on pressure sensors, honeycomb air chamber structures and multi-channel solenoid valve groups to automatically adjust the air chamber according to pressure changes to achieve close fit with the dragon bar panel and adaptive compensation; the temperature compensation module dynamically corrects the zero drift of the pressure sensor according to the temperature to ensure accurate adaptive compensation. The vibration suppression structure in the L-shaped supporting square tube uses piezoelectric ceramic sheets and shear thickening fluid to effectively suppress vibrations. The cross-shaped cross reinforcement ribs enhance its strength and rigidity. The specific angle of the U-shaped round steel, the anti-slip rubber layer and the hemispherical protrusions in the anti-backward shift component not only increase the friction to prevent the lifting ear from sliding, but also protect the surface of the lifting ear, all-round guarantee that the fixture can complete the D-type lifting ear cutting work efficiently, stably and safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the front side of the connection structure between the fixture body and the dragon tendon panel;

[0033] Figure 2 This is a schematic diagram of the other side of the front of the connection structure between the fixture body and the dragon tendon panel;

[0034] Figure 3 This is a schematic diagram of the back side of the connection structure between the fixture body and the rib panel;

[0035] Figure 4 It is a schematic diagram of the cross-sectional structure of the vibration suppression structure in the fixed lifting lug module;

[0036] Figure 5 It is a cross-sectional schematic diagram of the adaptive compensation mechanism within the panel contact block.

[0037] Explanation of reference numerals: 1. fixture body; 11. micro electric push rod; 2. fixed lifting ear module; 21. L-shaped supporting square tube; 211. horizontal section; 212. vertical section; 213. inclined square tube; 214. anti-lateral displacement bolt; 22. tightening structure; 221. adjusting top plate; 222. tightening hydraulic cylinder; 23. vibration suppression structure; 231. piezoelectric ceramic sheet; 232. shear thickening liquid; 24. reinforcing rib; 3. clamping dragon rib panel module; 31. main steel plate; 311. sliding groove; 32. auxiliary support frame; 321. support rod frame; 4. Automatic adjustment module; 41. Angle sensor; 42. Controller; 5. Anti-backward movement component; 51. U-shaped round steel; 52. Anti-slip rubber layer; 6. Adjustable clamp; 61. Sliding base; 62. Panel contact block; 621. Threaded groove; 622. Temperature compensation module; 6221. Temperature sensor; 6222. Copper heat pipe array; 7. Adjustment bolt; 8. Adaptive compensation mechanism; 81. Pressure sensor; 82. Honeycomb air chamber structure; 821. Air chamber; 822. Micro bellows air cushion; 823. Air guide groove; 83. Multi-channel solenoid valve group. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-5 This application is described in further detail.

[0039] The embodiment of the present application discloses a special jig for cutting off a D-shaped lifting lug on a vertical keel panel of a bulk carrier.

[0040] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A special jig for cutting off a D-shaped lifting lug on a vertical keel panel of a bulk carrier comprises: a jig body 1, the jig body 1 comprises a fixed lifting lug module 2, a clamping keel panel module 3 and an automatic adjustment module 4; a fixed lifting lug module 2, the fixed lifting lug module 2 comprises an L-shaped supporting square tube 21, a horizontal section 211 of the L-shaped supporting square tube 21 has an anti-rearward movement component 5 at its free end, a vertical section 212 of the L-shaped supporting square tube 21 is symmetrically welded with an inclined square tube 213, and an inclined square tube 214 is symmetrically welded with an inclined square tube 215. The tube 213 is at an obtuse angle to the horizontal section 211 and an anti-lateral displacement bolt 214 is installed at the end; the anti-rearward displacement component 5 is a U-shaped round steel 51, whose opening direction forms an obtuse angle with the supporting surface of the L-shaped supporting square tube 21, and the U-shaped round steel 51 is welded to the upper ends of the inclined square tubes 213 on both sides; the anti-lateral displacement bolts 214 are symmetrically arranged at the ends of the inclined square tubes 213, and the bolt axes intersect perpendicularly with the center line of the L-shaped supporting square tube 21; the clamping dragon bar panel module 3, the clamping dragon bar The panel module 3 includes a main steel plate 31, the middle part of the main steel plate 31 is welded to the side of the L-shaped supporting square tube 21, and sliding grooves 311 are provided on both sides of the main steel plate 31. An adjustable clamp 6 is installed in the sliding groove 311, and the adjustable clamp 6 is fixedly connected to the dragon tendon panel through an adjusting bolt 7; the adjustable clamp 6 includes a sliding base 61 and a panel contact block 62, the sliding base 61 and the sliding groove 311 are clearance-matched, and a threaded groove 621 is provided on the panel contact block 62 and cooperates with the adjusting bolt 7; an automatic adjustment module 4, the automatic adjustment module 4 includes an angle sensor 41 and a controller 42 installed at the connection between the fixed hanging ear module 2 and the clamping dragon tendon panel module 3, the angle sensor 41 is used to monitor the angle information between the fixture and the dragon tendon panel in real time, and a micro electric push rod 11 is provided on the side of the fixture body 1 close to the dragon tendon panel, and the controller 42 is signal-connected to the angle sensor 41 and the micro electric push rod 11. The L-shaped supporting square tube 21 is used to support the D-shaped lifting ear. The U-shaped round steel 51 anti-rearward movement component 5 at the free end of the horizontal section 211 prevents the lifting ear from moving backward. The inclined square tube 213 welded to the vertical section 212 of the L-shaped supporting square tube 21 has anti-lateral movement bolts 214 installed at its end arranged symmetrically and the bolt axis intersects vertically with the center line of the L-shaped supporting square tube 21, which can prevent the lifting ear from moving sideways, thereby achieving stable fixation of the D-shaped lifting ear. The middle part of the main steel plate 31 is welded to the side of the L-shaped supporting square tube 21, and sliding grooves 311 are provided on both sides. The adjustable clamp 6 in the sliding groove 311 is fixedly connected to the dragon bar panel through the adjusting bolt 7. The sliding base 61 of the adjustable fixture 6 is in clearance with the sliding groove 311, and can be moved in the sliding groove 311 and fixed in a suitable position according to the size of the rib panel. The threaded groove 621 on the panel contact block 62 is in cooperation with the adjusting bolt 7. By turning the adjusting bolt 7, the panel contact block 62 is pressed against the rib panel, thereby firmly connecting the fixture body 1 with the rib panel. The angle sensor 41 installed at the connection between the fixed ear module 2 and the clamping rib panel module 3 monitors the angle information between the fixture and the rib panel in real time, and feeds the information back to the controller 42.When the angle deviates, the controller 42 receives the signal from the angle sensor 41 and sends a command to the micro electric push rod 11. The micro electric push rod 11 performs a telescopic action to adjust the angle of the fixture body 1 so that it maintains a suitable angle with the dragon bar panel to meet the working requirements of cutting the D-type lifting ear.

[0041] Reference Figure 1 and Figure 2 A tightening structure 22 is installed on one side of the fixed lifting ear module 2 close to the rib panel. The tightening structure 22 includes an adjustable top plate 221 installed on the inner side of the main steel plate 31, wherein the adjustable top plate 221 is inclined from the center of the main steel plate 31 to both sides, and the adjustable top plate 221 is rotatably connected to the main steel plate 31, and the free end of the adjusting plate is rotatably connected to a tightening hydraulic cylinder 222, and the other end of the tightening hydraulic cylinder 222 is rotatably installed on the main steel plate 31. An auxiliary support frame 32 is fixedly installed below the main steel plate 31, including a support rod frame 321 inclined from the bottom of the main steel plate 31 toward the rib panel, wherein the micro electric push rod 11 is rotatably connected to the free end of the support rod frame 321. When the fixed lifting ear module 2, the clamping dragon bar panel module 3 and the automatic adjustment module 4 in the fixture body 1 are installed on the dragon bar panel, the adjusting top plate 221 is driven by the tightening hydraulic cylinder 222 to rotate around the axis, and its inclined surface is pressed against the dragon bar panel. When the tightening hydraulic cylinder 222 applies thrust, the adjusting top plate 221 converts the horizontal thrust into a vertical component force, and cooperates with the panel contact block 62 to achieve symmetrical clamping of the dragon bar panel through a two-way clamping action. At the same time, the support rod frame 321 and the micro electric push rod 11 form a triangular stable structure. The push rod can be extended and retracted to dynamically adjust the contact angle between the fixture body 1 and the dragon bar panel, eliminating the moment imbalance caused by the panel installation deviation, improving the uniformity of the clamping force distribution, and avoiding the displacement of the lifting ear caused by local stress concentration.

[0042] Reference Figure 1 , Figure 3 and Figure 5The contact surface between the panel contact block 62 and the rib panel is provided with an adaptive compensation mechanism 8, including a pressure sensor 81 distributed in an array on the contact surface, and a honeycomb air chamber structure 82 is filled below the pressure sensor 81, wherein the honeycomb air chamber structure 82 is connected to a compressed air source through a multi-channel solenoid valve group 83. A single air chamber 821 in the honeycomb air chamber structure 82 has a diameter of 2 mm and a depth of 5 mm. A micro-bellows air cushion 822 is built into the air chamber 821. The micro-bellows air cushion 822 is made of silicone material, and adjacent air chambers 821 are connected through air guide grooves 823. The pressure sensor 81 and the multi-channel solenoid valve group 83 are both connected to the controller 42 by signal. A temperature compensation module 622 is embedded in the outer wall of the panel contact block 62. The temperature compensation module 622 includes a temperature sensor 6221 and a copper heat pipe array 6222 distributed in an annular manner around the honeycomb air chamber structure 82. The controller 42 is preset with a dynamic compensation algorithm: when it is detected that the pressure value P in a certain area is greater than the set threshold value P0, the corresponding solenoid valve is opened to release the pressure; when P is less than P0, 0.5MPa compressed air is filled into the air cushion to achieve local bulge; the controller 42 dynamically corrects the zero drift of the pressure sensor 81 according to the temperature data, and the correction formula is: ΔP=K×(T-T0), where K=0.05N / ℃ and T0=25℃ calibration temperature. The pressure sensor 81 array monitors the contact pressure distribution between the contact block and the rib panel in real time. If the uneven surface of the panel causes local high pressure, when the pressure in a certain area exceeds the threshold value P0, the controller 42 opens the corresponding solenoid valve to relieve the pressure and shrink the air cushion in the area, and the height of the air cushion decreases to avoid overpressure damage to the panel; when the pressure is insufficient, the air cushion is inflated to expand the bellows and fill the concave area of ​​the panel. The temperature compensation module 622 balances the temperature field of the contact block through the copper heat pipe array 6222, and eliminates the temperature drift by combining the correction formula ΔP=K(T-T0), thereby ensuring that the pressure detection accuracy is stable within the set range.

[0043] Reference Figure 1 and Figure 4 , a vibration suppression structure 23 is embedded in the L-shaped supporting square tube 21, including piezoelectric ceramic sheets 231 arranged at intervals along the length direction of the L-shaped supporting square tube 21, and a shear thickening liquid 232 is filled between the piezoelectric ceramic sheets 231. A reinforcing rib 24 structure is provided inside the horizontal section 211 of the L-shaped supporting square tube 21, wherein the reinforcing rib 24 structure is cross-distributed, and the thickness of the reinforcing rib 24 is greater than the wall thickness of the L-shaped supporting square tube 21. When the vibration wave generated during the cutting process is transmitted to the L-shaped supporting square tube 21, the piezoelectric ceramic sheet 231 converts the mechanical vibration into an electrical signal. After the controller 42 analyzes the vibration frequency, it generates a cancellation signal through phase inversion, so that the piezoelectric ceramic sheet 231 generates reverse vibration. At the same time, the viscosity of the filled shear thickening liquid 232 increases sharply when subjected to high-frequency impact, dissipating more than 80% of the vibration energy. The cross-shaped reinforcing ribs 24 increase the bending section modulus of the square tube and suppress the structural resonance caused by the cutting reaction force.

[0044] Reference Figure 1 and Figure 2 The U-shaped round steel 51 in the anti-backward movement component 5 is 155° to the supporting surface of the L-shaped supporting square tube 21, wherein the surface of the U-shaped round steel 51 is coated with an anti-skid rubber layer 52, and the anti-skid rubber layer 52 is staggered with hemispherical protrusions. The U-shaped round steel 51 abuts against the back of the lifting ear at an angle of 155°, and the hemispherical protrusions of the anti-skid rubber layer 52 are embedded in the surface of the lifting ear, producing a mechanical interlocking effect. When the lifting ear moves backward due to the cutting force, the protrusions deform to generate resistance, and cooperate with the constraint structure of the U-shaped structure to convert the sliding friction of the traditional steel wire rope fixation into static friction, and the anti-skid resistance is greatly improved.

[0045] Working principle: Check the various parts, electronic components and circuits of the fixture, and prepare a compressed air source that meets the pressure requirements. Place the L-shaped supporting square tube 21 under the D-shaped lifting ear, use the U-shaped round steel 51 to prevent backward movement, and adjust the anti-lateral movement bolt 214 to fix the lifting ear. Weld the main steel plate 31 and the L-shaped supporting square tube 21, adjust the adjustable clamp 6 in the sliding groove 311, and connect the fixture and the dragon bar panel with the adjusting bolt 7. Turn on the angle sensor 41 and the controller 42, and adjust the angle of the fixture according to the angle deviation instruction micro electric push rod 11. Turn the adjustment top plate 221, adjust the tightening hydraulic cylinder 222, and apply a tightening force to the D-shaped lifting ear. The pressure sensor 81 monitors the contact pressure. If it exceeds the threshold, the controller 42 controls the pressure relief. If it is insufficient, it is compensated by inflation. The temperature compensation module 622 corrects the zero drift of the pressure sensor 81. When cutting, the piezoelectric ceramic sheet 231 and the shear thickening liquid 232 in the L-shaped supporting square tube 21 suppress vibration, and the reinforcing rib 24 enhances the structural strength. The auxiliary support frame 32 cooperates with the micro electric push rod 11 to maintain the stability of the fixture. After completing the preparation adjustment, use a tool to cut off the lifting lugs and continuously monitor the status of the fixture. Dismantle the connections of each component, clean the fixture, check and replace damaged components, and lubricate the adjustable components.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A special jig for cutting off the D-shaped lifting lugs on the vertical keel panels of bulk carriers, characterized in that: include: A fixture body (1), the fixture body (1) comprising a fixing ear module (2), a rib panel clamping module (3) and an automatic adjustment module (4); A fixed lifting ear module (2), the fixed lifting ear module (2) comprising an L-shaped supporting square tube (21), the horizontal section (211) of the L-shaped supporting square tube (21) having a free end provided with an anti-backward movement assembly (5), the vertical section (212) of the L-shaped supporting square tube (21) being symmetrically welded with an inclined square tube (213), the inclined square tube (213) and the horizontal section (211) forming an obtuse angle and having an anti-lateral movement bolt (214) installed at the end; the anti-lateral movement assembly (5) is a U-shaped round steel (51), the opening direction of which forms an obtuse angle with the supporting surface of the L-shaped supporting square tube (21), the U-shaped round steel (51) being welded to the upper ends of the inclined square tubes (213) on both sides; the anti-lateral movement bolts (214) being symmetrically arranged at the ends of the inclined square tubes (213), the bolts The axis intersects perpendicularly with the center line of the L-shaped supporting square tube (21); a clamping dragon tendon panel module (3), wherein the clamping dragon tendon panel module (3) comprises a main steel plate (31), the middle of the main steel plate (31) is welded to the side of the L-shaped supporting square tube (21), and sliding grooves (311) are provided on both sides of the main steel plate (31), and an adjustable clamp (6) is installed in the sliding groove (311), and the adjustable clamp (6) is fixedly connected to the dragon tendon panel through an adjusting bolt (7); the adjustable clamp (6) comprises a sliding base (61) and a panel contact block (62), and the sliding base (61) and the sliding groove (311) are clearance-matched, and the panel contact block (62) is provided with a threaded groove (621) and cooperates with the adjusting bolt (7); The automatic adjustment module (4) comprises an angle sensor (41) and a controller (42) installed at the connection position between the fixing ear module (2) and the clamping rib panel module (3), wherein the angle sensor (41) is used to monitor the angle information between the fixture and the rib panel in real time, a micro electric push rod (11) is provided on the side of the fixture body (1) close to the rib panel, and the controller (42) is signal-connected to the angle sensor (41) and the micro electric push rod (11).

2. The special jig for cutting off the D-shaped lifting lug on the vertical keel panel of a bulk carrier according to claim 1 is characterized in that: A tightening structure (22) is installed on one side of the fixed lifting ear module (2) close to the rib panel, and the tightening structure (22) includes an adjusting top plate (221) installed on the inner side of the main steel plate (31), wherein the adjusting top plate (221) is inclined from the center of the main steel plate (31) to both sides, and the adjusting top plate (221) is rotatably connected to the main steel plate (31), and the free end of the adjusting plate is rotatably connected to a tightening hydraulic cylinder (222), and the other end of the tightening hydraulic cylinder (222) is rotatably installed on the main steel plate (31).

3. The special jig for cutting off the D-shaped lifting lug on the vertical keel panel of a bulk carrier according to claim 2 is characterized in that: An auxiliary support frame (32) is fixedly installed below the main steel plate (31), comprising a support frame (321) inclined from the bottom of the main steel plate (31) toward the rib panel, wherein the micro electric push rod (11) is rotatably connected to the free end of the support frame (321).

4. The special jig for cutting off the D-shaped lifting lug on the vertical keel panel of a bulk carrier according to claim 1 is characterized in that: The contact surface between the panel contact block (62) and the rib panel is provided with an adaptive compensation mechanism (8), comprising pressure sensors (81) distributed in an array on the contact surface, and a honeycomb air chamber structure (82) is filled below the pressure sensor (81), wherein the honeycomb air chamber structure (82) is connected to a compressed air source via a multi-channel electromagnetic valve group (83).

5. The special jig for cutting off the D-shaped lifting lug on the vertical keel panel of a bulk carrier according to claim 4 is characterized in that: A single air chamber (821) in the honeycomb air chamber structure (82) has a diameter of 2-5 mm and a depth of 5-10 mm. A micro bellows air cushion (822) is built into the air chamber (821). The micro bellows air cushion (822) is made of silica gel, and adjacent air chambers (821) are connected via air guide grooves (823).

6. The special jig for cutting off the D-shaped lifting lug on the vertical keel panel of a bulk carrier according to claim 5 is characterized in that: The pressure sensor (81) and the multi-channel solenoid valve group (83) are both connected to the controller (42) by signal. A temperature compensation module (622) is embedded in the outer wall of the panel contact block (62). The temperature compensation module (622) includes a temperature sensor (6221) and a copper heat pipe array (6222) distributed in an annular manner around the honeycomb air chamber structure (82).

7. The special jig for cutting off the D-shaped lifting lugs on the vertical keel panels of bulk carriers according to claim 6 is characterized in that: The controller (42) is pre-installed with a dynamic compensation algorithm: When the pressure value P in a certain area is detected to be greater than the set threshold value P0 (15N), the corresponding solenoid valve is opened to release the pressure; When P<P0, 0.2-0.5MPa compressed air is filled into the air cushion to achieve local bulge; The controller (42) dynamically corrects the zero drift of the pressure sensor (81) according to the temperature data, and the correction formula is: ΔP=K×(T-T0), In the formula, K = 0.05N / °C, T0 = 25°C calibration temperature.

8. The special jig for cutting off the D-shaped lifting lugs on the vertical keel panels of bulk carriers according to claim 1 is characterized in that: The L-shaped supporting square tube (21) is embedded with a vibration suppression structure (23), comprising piezoelectric ceramic sheets (231) arranged at intervals along the length direction of the L-shaped supporting square tube (21), and a shear thickening liquid (232) is filled between the piezoelectric ceramic sheets (231).

9. The special jig for cutting off the D-shaped lifting lugs on the vertical keel panels of bulk carriers according to claim 8 is characterized in that: A reinforcing rib (24) structure is provided inside the horizontal section (211) of the L-shaped supporting square tube (21), wherein the reinforcing rib (24) structure is cross-distributed, and The thickness of the reinforcing rib (24) is greater than the wall thickness of the L-shaped supporting square tube (21).

10. The special jig for cutting off the D-shaped lifting lug on the vertical keel panel of a bulk carrier according to claim 1, characterized in that: The U-shaped round steel (51) in the anti-backward movement component (5) and the supporting surface of the L-shaped supporting square tube (21) are at an angle of 150-160 degrees, wherein the surface of the U-shaped round steel (51) is coated with an anti-skid rubber layer (52), and the anti-skid rubber layer (52) is staggeredly provided with hemispherical protrusions.

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