Whole machine hoisting method of movable ship loader

Abstract

The invention relates to the technical field of complete machine hoisting, and discloses a complete machine hoisting method for a movable ship loader, which comprises the following steps: S1, calculating the weight and the gravity center position of the movable ship loader, and determining the hoisting point position range on a portal cross beam of the movable ship loader according to the gravity center position; s2, the hoisting posture of the movable ship loader is adjusted according to the structure and the hoisting point position range of the movable ship loader; s3, determining a plurality of groups of lifting point positions on the upper surface of the gantry cross beam according to the lifting point position range and the structure of the gantry cross beam; s4, the maximum stress of the movable ship loader under the hoisting working condition is analyzed and calculated based on the multiple sets of hoisting point positions and the hoisting postures, and if the maximum stress is smaller than the allowable stress of the material at the position corresponding to the maximum stress, the hoisting requirement is met; and S5, a lifting lug is installed at each lifting point position of the portal cross beam, and lifting equipment is used for lifting the movable ship loader in the lifting posture. The ship loader can meet the requirements of complete machine transportation of various ship loaders.

Description

Technical Field

[0001] The present application relates to the technical field of whole-machine hoisting, and in particular to a whole-machine hoisting method for a mobile ship loader. Background Art

[0002] Mobile ship loaders are large, efficient, and modern industrial equipment for continuous loading of bulk materials. They are widely used for loading operations at bulk material storage yards at ports and terminals. Mobile ship loaders are typically transported via both roll-on / roll-off at the factory terminal and roll-on / roll-off at the user terminal. However, as terminal construction becomes larger, more modern, and more efficient, the elevation of the terminal has increased, making it difficult for transport vessels to accommodate both modes of transport. Furthermore, when rolling equipment ashore at the user terminal, it may interfere with the terminal corridors. Since terminals require continuous production operations, dismantling the corridors would be time-consuming and time-consuming, impacting terminal production. Therefore, dismantling the corridors is inconvenient, and roll-on / roll-off transportation of equipment is limited. Summary of the Invention

[0003] In view of the above-mentioned problems in the prior art, the purpose of this application is to propose a method for hoisting the entire mobile ship loader, which can solve the problem of difficulty in transferring the mobile ship loader.

[0004] In order to solve at least one of the above technical problems, the technical solution of this application is as follows:

[0005] The present application provides a method for hoisting a mobile ship loader, comprising:

[0006] Step S1, calculating the weight and center of gravity of the mobile ship loader, and determining the range of lifting point positions on the gantry crossbeam of the mobile ship loader based on the center of gravity position;

[0007] Step S2: adjusting the lifting posture of the mobile ship loader according to the structure of the mobile ship loader and the position range of the lifting points;

[0008] Step S3: determining multiple groups of lifting point positions on the upper surface of the portal crossbeam according to the lifting point position range and the structure of the portal crossbeam;

[0009] Step S4: Analyze and calculate the maximum stress of the mobile ship loader under the lifting condition based on the multiple sets of lifting point positions and lifting postures. If the maximum stress is less than the allowable stress of the material at the position corresponding to the maximum stress, the lifting requirements are met.

[0010] Step S5: Install lifting lugs at each lifting point of the portal beam, and use lifting equipment to lift the mobile ship loader in the lifting posture.

[0011] In some embodiments, in step S1, calculating the weight and center of gravity position of the mobile ship loader includes:

[0012] According to the weight and gravity center coordinates of each component of the mobile ship loader, the weight and gravity center position of the entire mobile ship loader are calculated using the gravity center coordinate formula.

[0013] In some embodiments, in step S1, determining a range of lifting point positions on a gantry beam of a mobile ship loader based on the center of gravity position includes:

[0014] According to the center of gravity position, the lifting point position ranges are respectively determined on both ends of the gantry crossbeam of the mobile ship loader along its length direction, and the two lifting point position ranges are symmetrically located on both sides of the center of gravity position.

[0015] In some embodiments, the lifting posture includes the boom posture of the mobile ship loader and the rotation position of the rotation mechanism, and the boom posture includes the boom telescopic length and the boom pitch angle.

[0016] In some embodiments, step S3 includes:

[0017] Calculate the bearing capacity of each position of the portal beam;

[0018] According to the bearing capacity of each position, within the range of the lifting point position, multiple groups of lifting point positions are arranged at intervals along the length direction of the upper surface of the portal frame crossbeam, and the lifting point positions in each group of lifting point positions are arranged at intervals along the width direction of the portal frame crossbeam;

[0019] The distance between two adjacent groups of hanging point positions and the distance between two adjacent hanging point positions in each group of hanging point positions are adjusted to determine multiple groups of hanging point positions.

[0020] In some embodiments, each group of suspension point positions includes two suspension point positions symmetrically arranged on two crossbeams of the portal frame crossbeam, and each suspension point position is located above the web of its corresponding crossbeam.

[0021] In some embodiments, step S3 further includes:

[0022] The lifting tooling is determined based on the weight of the mobile ship loader, the positions of multiple lifting points and the spatial relationship between the various components on the mobile ship loader to prevent interference between the lifting rigging and the mobile ship loader.

[0023] In some embodiments, in step S5, the lifting equipment is connected to the lifting fixture via a lifting wire rope, and the lifting fixture is connected to multiple sets of lifting point positions via a lifting sling;

[0024] The lifting tooling includes a lifting beam, which is located above the mobile ship loader and whose length direction is consistent with the length direction of the gantry crossbeam. A plurality of pulley assemblies are arranged on the lifting beam along its length direction. Each pulley assembly includes an upper pulley connected to the lifting wire rope and a lower pulley connected to the lifting sling.

[0025] In some embodiments, in step S4, based on multiple sets of lifting point positions and lifting postures, analyzing and calculating the maximum stress of the mobile ship loader under the lifting condition includes:

[0026] Based on multiple sets of lifting point positions and lifting postures, the finite element analysis method was used to model the mobile ship loader. The overall and local stress analysis of the mobile ship loader was carried out, and the maximum stress of the mobile ship loader under lifting conditions was calculated.

[0027] In some embodiments, in step S5, installing a lifting lug at each lifting point of the portal beam includes:

[0028] Weld connecting lugs at each lifting point on the upper surface of the portal beam;

[0029] Reinforcement ribs are welded on both sides of each lifting lug, and each reinforcement rib is welded to the portal crossbeam.

[0030] The above technical solution of the present application has at least one of the following beneficial effects:

[0031] According to the present application, a method for hoisting a mobile ship loader is proposed. This method adjusts the hoisting posture of the mobile ship loader based on the structure of the mobile ship loader and the range of the lifting point positions, making the hoisting solution more adaptable to ship loaders of different models and specifications, thereby improving the versatility and flexibility of the hoisting. The positions of the lifting points are rationally designed based on the center of gravity of the entire machine, preventing interference between the hoisting equipment and the mobile ship loader, thereby improving the efficiency of hoisting the mobile ship loader.

[0032] In addition, in the technical solution of the present application, anything not specifically stated can be implemented by adopting conventional means in this field. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] Figure 1 This is a flow chart of a method for hoisting a whole mobile ship loader according to one embodiment of the present application;

[0035] Figure 2 This is a front view of a structural schematic diagram of a mobile ship loader according to an embodiment of the present application;

[0036] Figure 3 A side view of a structural schematic diagram of a mobile ship loader according to an embodiment of the present application;

[0037] Figure 4 A top view of a structural schematic diagram of a mobile ship loader according to an embodiment of the present application;

[0038] Figure 5 This is a structural diagram of the arrangement of a lifting tool according to one embodiment of the present application;

[0039] Figure 6 This is a structural front view of a lifting lug according to an embodiment of the present application;

[0040] Figure 7 This is a structural side view of a lifting ear according to an embodiment of the present application.

[0041] Description of the reference numerals in the accompanying drawings:

[0042] Mobile ship loader 100, traveling mechanism 101, portal beam 102, slewing mechanism 103, boom 104, counterweight beam 105;

[0043] Center of gravity position 200;

[0044] Lifting tool 300, lifting sling 301, lifting beam 302, pulley assembly 303, upper pulley 303-1, lower pulley 303-2;

[0045] Lifting ear 400 , lifting hole 401 , ear plate 402 , first reinforcing rib 403 , second reinforcing rib 404 . DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of this application more clear, the application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are part of the embodiments of this application, rather than all of the embodiments, and are only used to explain this application and are not intended to limit this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0047] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "two ends", "both sides", "bottom", "top", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting this application. In addition, the terms "first", "second", "superior", "inferior", "primary", "secondary", etc. are used for descriptive purposes only and can be simply used to more clearly distinguish different components, but cannot be understood as indicating or implying relative importance.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0049] See also Figure 1 , schematically showing a method for hoisting a mobile ship loader according to an embodiment of the present application, the method comprising steps S1 to S5:

[0050] Step S1: Calculate the weight and center of gravity of the mobile ship loader, and determine the range of lifting point positions on the gantry crossbeam of the mobile ship loader based on the center of gravity.

[0051] For example, Figure 2 As shown, it shows a front view of a mobile ship loader 100, as shown Figure 3 As shown, it shows Figure 2 The overall structure of the mobile ship loader 100 includes a traveling mechanism 101, a gantry beam 102, a slewing mechanism 103, an arm 104 and a counterweight beam 105. Figure 2 As shown in the front view provided, the walking mechanism 101, the gantry beam 102 and the slewing mechanism 103 are symmetrical structures as a whole. Figure 3As shown in the side view provided, the boom 104 and counterweight beam 105 are located on either side of the center of gravity 200. Since the slewing mechanism 103 of the mobile ship loader 100 is a rotating component, it is not suitable for setting lifting points. To ensure the stability of the lifting points, the lifting points need to be symmetrically arranged on both sides of the center of gravity 200. Therefore, symmetrically arranging the lifting points on the gantry crossbeam 102 is the optimal range. Step S1 calculates the weight of the mobile ship loader 100 and the center of gravity 200 to determine the lifting point position range, thereby ensuring the stability of the lifting points.

[0052] Specifically, in step S1, the method for calculating the weight and center of gravity position 200 of the mobile ship loader 100 can be performed by using a barycentric coordinate formula based on the weight and center of gravity coordinates of each component of the mobile ship loader 100. More specifically, the volume and center of gravity coordinates of each component are extracted using 3D modeling software. The overall weight of the mobile ship loader 100 is then calculated by combining the material density of each component with the weight obtained by physical weighing. The overall center of gravity position 200 of the mobile ship loader 100 is then calculated using the weights of each component and its center of gravity coordinates.

[0053] Specifically, in step S1, a lifting point position range is determined on the gantry beam 102 of the mobile ship loader 100 based on the center of gravity position 200. This includes determining a lifting point position range at each end of the gantry beam 102 of the mobile ship loader 100 along its length based on the center of gravity position 200, with the two lifting point position ranges being symmetrically located on either side of the center of gravity position 200. More specifically, a minimum safe distance between the lifting point and the center of gravity is set based on the total length of the gantry beam 102 and the structure of the mobile ship loader 100, and the lifting point position range is determined based on the minimum safe distance.

[0054] Step S2: adjusting the lifting posture of the mobile ship loader 100 according to the structure of the mobile ship loader 100 and the position range of the lifting points.

[0055] The hoisting posture includes the posture of the boom 104 of the mobile ship loader 100 and the rotation position of the rotation mechanism 103 . The posture of the boom 104 includes the telescopic length of the boom 104 and the pitch angle of the boom 104 .

[0056] Specifically, the spacing and relative position relationship between the gantry crossbeam 102 and the main load-bearing structures such as the slewing mechanism, boom 104 and counterweight beam 105, as well as the relationship with the surrounding auxiliary structures are evaluated, and the lifting posture of the mobile ship loader 100 is determined in combination with the position range of the lifting points.

[0057] For example, Figure 3 As shown, the boom 104 is set to pitch upward by 35 degrees. Figure 4The figure shows a top view of a mobile ship loader 100, with direction A indicating the seaward side, direction B indicating the landward side, and direction C indicating the tail truck. The upper slewing structure of the mobile ship loader 100 is rotated 90° to the left, with the slewing center facing the seaward side in direction A. This position approximates the ideal lifting posture. In this lifting posture, the upper slewing structure of the mobile ship loader 100 is anchored to prevent rotation during lifting and ensure safe lifting.

[0058] Step S3: Determine multiple groups of lifting point positions on the upper surface of the portal crossbeam 102 according to the lifting point position range and the structure of the portal crossbeam 102.

[0059] In step S3, multiple groups of hanging point positions are arranged on the upper surface of the portal crossbeam 102, which can avoid changing the structural design of the portal crossbeam 102 and reduce secondary damage to the equipment structure.

[0060] Specifically, step S3 includes steps S31 to S33:

[0061] Step S31: Calculate the load-bearing capacity at each location of the portal crossbeam 102. Specifically, calculate its dynamic load and limit operating conditions based on the material and structural parameters of the portal crossbeam 102. Finite element analysis can also be used to simulate and analyze the load-bearing capacity of the portal crossbeam 102.

[0062] Step S32: Based on the load-bearing capacity of each position, multiple groups of lifting points are spaced apart along the length of the upper surface of the portal beam 102 within the range of lifting point positions. The lifting points in each group are spaced apart along the width of the portal beam 102. Specifically, the multiple groups of lifting points are evenly distributed along the length of the portal beam 102 to avoid localized stress concentration and to avoid structural weaknesses on the portal beam 102, such as welds and holes. Multiple lifting points can be set across the width of the portal beam 102 to distribute the load and avoid overloading at any single point.

[0063] Step S33: Adjust the distances between two adjacent groups of lifting point positions, as well as the distances between two adjacent lifting point positions within each group, to determine multiple groups of lifting point positions. Furthermore, a minimum safety distance is preset between two adjacent lifting point positions within each group to prevent concentrated forces on the lifting points from affecting the structure.

[0064] Each group of lifting point positions includes two lifting point positions symmetrically arranged on two crossbeams of the portal crossbeam 102, and each lifting point position is located above the web of its corresponding crossbeam.

[0065] In some embodiments, step S3 further includes determining a lifting fixture based on the weight of the mobile ship loader 100, the locations of the multiple lifting points, and the spatial relationships between the various components of the mobile ship loader 100 to prevent interference between the lifting sling and the mobile ship loader 100. The selection of the lifting fixture in this step prepares for subsequent lifting.

[0066] In step S3, multiple sets of lifting points are arranged on the upper surface of portal beam 102. This means that when arranging lifting lugs, they are placed on the upper surface of the portal beam 102 box structure. The lifting lugs do not need to be embedded in the box structure, thus avoiding changes to the structural design of portal beam 102 and reducing secondary damage to the equipment structure. Accordingly, when performing force analysis based on the multiple sets of lifting point locations and the structure of portal beam 102, the impact of this lifting lug arrangement on the load should be considered.

[0067] Step S4: Analyze and calculate the maximum stress of the mobile ship loader 100 under the lifting condition based on the multiple sets of lifting point positions and lifting postures. If the maximum stress is less than the allowable stress of the material at the position corresponding to the maximum stress, the lifting requirements are met.

[0068] Specifically, based on multiple sets of lifting point positions and lifting postures, the maximum stress of the mobile ship loader 100 under the lifting condition is analyzed and calculated, specifically including: based on multiple sets of lifting point positions and lifting postures, the mobile ship loader 100 is modeled using the finite element analysis method, and the overall and local force analysis of the mobile ship loader 100 is performed to calculate the maximum stress of the mobile ship loader 100 under the lifting condition.

[0069] For example, general finite element software is used for modeling, and the proposed lifting state is simulated and analyzed to analyze the overall and local stress conditions, adjust the lifting posture of the finite element model, add simulation units of the lifting equipment to the overall structure of the finite element model, and calculate the maximum stress.

[0070] Step S5: Install lifting lugs at each lifting point of the portal beam 102, and use lifting equipment to lift the mobile ship loader 100 in the lifting posture.

[0071] Specifically, if Figure 5 As shown, the lifting equipment is connected to a lifting fixture 300 via a lifting wire rope, and the lifting fixture 300 is connected to multiple lifting points via a lifting sling 301. The lifting fixture 300 includes a lifting beam 302, which is located above the mobile ship loader 100 and has a length aligned with the length of the gantry crossbeam 102. Multiple pulley assemblies 303 are arranged in compartments along the length of the lifting beam 302. Each pulley assembly 303 includes an upper pulley 303-1 connected to the lifting wire rope and a lower pulley 303-2 connected to the lifting sling 301. The types of lifting wire rope and lifting sling 301 used during lifting are adjusted according to the actual load.

[0072] The lifting fixture 300 achieves large load dispersion transmission through the coordinated design of the lifting beam 302 and the pulley assembly 303, and can be flexibly adjusted according to the position of the lifting point, while preventing the lifting fixture 300 from interfering with the various mechanisms of the mobile ship loader 100.

[0073] Specifically, a lifting lug 400 is welded to each lifting point on the upper surface of the gantry crossbeam 102. Figure 6 and Figure 7 As shown, Figure 6 This is the structural front view of the lifting lug 400. Figure 7 This is a side view of the structure of the lifting lug 400, which includes a lifting hole 401 and a lug plate 402. A first reinforcing rib 403 and a second reinforcing rib 404 are welded to either side of each lifting lug 400. The first and second reinforcing ribs 403, 404 are welded to the mast crossbeam 102. The first and second reinforcing ribs 403, 404 transfer the lifting point load to the web of the mast crossbeam 102, thereby increasing the strength of the weld and the lug plate 402 and preventing tearing at the base of the lug plate 402.

[0074] In summary, according to the method for lifting the entire mobile ship loader proposed in this application, the method adjusts the lifting posture of the mobile ship loader according to the structure of the mobile ship loader and the range of the lifting point position, so that the distribution of the lifting point position is more reasonable, and fully considers the structure of the mobile ship loader to prevent interference between the lifting tooling and the mechanism of the ship loader, thereby achieving uniform distribution of the load, so that the lifting scheme can better adapt to ship loaders of different models and specifications, improve the versatility and flexibility of the lifting, and improve the efficiency of lifting the mobile ship loader.

[0075] Based on the above-mentioned embodiments of the present application, in the absence of explicit negation or conflict, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0076] The above descriptions are merely some embodiments of the present application and are intended to illustrate the technical solution of the present application, not to limit it. It should be understood that, without departing from the inventive concept of the present application, those skilled in the art may make improvements or substitutions based on the above descriptions, and all such improvements and substitutions shall fall within the scope of protection of the present application. In such cases, all details may be replaced with equivalent elements, and the materials, shapes, and sizes may be arbitrary.

Claims

1. A method for hoisting a mobile ship loader, characterized in that: include: Step S1, calculating the weight and center of gravity position of the mobile ship loader, and determining the range of the lifting point positions on the gantry crossbeam of the mobile ship loader according to the center of gravity position; Step S2: adjusting the lifting posture of the mobile ship loader according to the structure of the mobile ship loader and the position range of the lifting points; Step S3, determining multiple groups of lifting point positions on the upper surface of the portal crossbeam according to the lifting point position range and the structure of the portal crossbeam; Step S4: analyzing and calculating the maximum stress of the mobile ship loader under the lifting condition based on the multiple sets of lifting point positions and the lifting postures; if the maximum stress is less than the allowable stress of the material at the position corresponding to the maximum stress, the lifting requirement is met; Step S5: Install lifting lugs at each lifting point of the portal beam, and use lifting equipment to lift the mobile ship loader in the lifting posture.

2. The whole machine hoisting method of the mobile ship loader according to claim 1, characterized in that: In step S1, calculating the weight and center of gravity of the mobile ship loader includes: According to the weight and gravity center coordinates of each component of the mobile ship loader, the weight of the entire mobile ship loader and the gravity center position are calculated using the gravity center coordinate formula.

3. The whole machine hoisting method of a mobile ship loader according to claim 1, characterized in that: In step S1, determining the range of the lifting point positions on the gantry crossbeam of the mobile ship loader according to the center of gravity position includes: According to the center of gravity position, the lifting point position ranges are respectively determined at both ends of the gantry crossbeam of the mobile ship loader along its length direction, and the two lifting point position ranges are symmetrically located on both sides of the center of gravity position.

4. The whole machine hoisting method of a mobile ship loader according to claim 1, characterized in that: The hoisting posture includes the arm posture of the mobile ship loader and the rotation position of the rotation mechanism, and the arm posture includes the arm telescopic length and the arm pitch angle.

5. The whole machine hoisting method of a mobile ship loader according to claim 1, characterized in that: The step S3 comprises: Calculating the bearing capacity of each position of the portal beam; According to the bearing capacity of each position, a plurality of groups of lifting point positions are arranged at intervals along the length direction of the upper surface of the portal crossbeam within the range of the lifting point positions, and each of the lifting point positions in each group of the lifting point positions is arranged at intervals along the width direction of the portal crossbeam; The distance between two adjacent groups of the hanging point positions and the distance between two adjacent hanging point positions in each group of the hanging point positions are adjusted to determine multiple groups of the hanging point positions.

6. The whole machine hoisting method of the mobile ship loader according to claim 5, characterized in that: Each group of the lifting point positions includes two lifting point positions symmetrically arranged on two crossbeams of the portal frame crossbeam, and each of the lifting point positions is located above the web of the corresponding crossbeam.

7. The whole machine hoisting method of a mobile ship loader according to claim 1, characterized in that: The step S3 further includes: The lifting tool is determined according to the weight of the mobile ship loader, the positions of the plurality of lifting points and the spatial relationship between the various components of the mobile ship loader to prevent the lifting rigging from interfering with the mobile ship loader.

8. The whole machine hoisting method of a mobile ship loader according to claim 7, characterized in that: In step S5, the hoisting equipment is connected to the hoisting tool via a hoisting wire rope, and the hoisting tool is connected to the plurality of hoisting point positions via the hoisting sling; The lifting tooling includes a lifting beam, which is located above the mobile ship loader and has a length direction consistent with the length direction of the portal beam. A plurality of pulley assemblies are arranged on the lifting beam along its length direction, and each pulley assembly includes an upper pulley connected to the lifting wire rope and a lower pulley connected to the lifting sling.

9. The whole machine hoisting method of a mobile ship loader according to claim 1, characterized in that: In step S4, based on the multiple sets of lifting point positions and the lifting posture, analyzing and calculating the maximum stress of the mobile ship loader under the lifting condition includes: Based on multiple sets of lifting point positions and the lifting postures, the mobile ship loader is modeled using the finite element analysis method, and the overall and local stress analysis of the mobile ship loader is performed to calculate the maximum stress of the mobile ship loader under the lifting condition.

10. The whole machine hoisting method of a mobile ship loader according to claim 1, characterized in that: In the step S5, installing a lifting lug at each of the lifting points of the portal beam comprises: Welding a connecting lug at each of the lifting points on the upper surface of the portal beam; Reinforcement ribs are welded to both sides of each lifting ear, and each reinforcement rib is welded to the portal crossbeam.

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