A gantry leg assembly process for a rotary ship loader

Abstract

The invention relates to a gantry leg assembly process for a rotary ship loader, comprising the following steps: step 1, metal processing of the gantry leg main beam; step 2, trimming and cutting the margin of the sea and land side support legs; step 3, hoisting the sea and land side support legs; step 4, hoisting the gantry leg main beam; step 5, installing and processing a trolley walking support; before the sea and land side support legs and the gantry leg main beam are assembled, the present invention uses the box center line marked on the sea and land side support leg box body and the height difference between the lower plane of the gantry leg main beam and the support leg welding position from the horizontal line as a reference, and cuts the margin at the splicing point of the sea and land side support legs and the gantry leg main beam in advance, thereby avoiding the situation that repeated corrections are required due to size mismatch when assembling the sea and land side support legs and the gantry leg main beam, thereby improving the assembly efficiency; when assembling the sea and land side support legs and the gantry leg main beam, when assembling the gantry leg main beam and the sea and land side support legs, and when installing and processing the trolley walking support, the rotation center line and the rotation track processing surface are used as a reference, thereby improving the assembly accuracy of the components.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary ship loaders, and in particular to a rotary ship loader door leg assembling process. Background Art

[0002] Ship loaders are large-scale bulk material machines used for loading ships at bulk material terminals. With the growth of ore and coal trade and the intensification of competition in the transportation market, the trend is towards larger ships and larger, more efficient loading and unloading equipment. The large, heavy legs of large rotary ship loaders make assembly difficult and inaccurate, requiring repeated adjustments and corrections during assembly, resulting in low efficiency.

[0003] Therefore, the present invention proposes a rotary ship loader door leg assembly process to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a rotary ship loader gantry leg assembly process, thereby improving the assembly accuracy of the gantry leg components and improving the assembly efficiency.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a rotary ship loader door leg assembly process, the innovation of which is: comprising the following steps:

[0006] Step 1: Metal processing of door leg main beam;

[0007] Step 1-1: Arrange the tire frame, transport the door leg main beam to the outside site, place it on the tire frame, and adjust the level with a jack;

[0008] Step 1-2: Mark the entire structure and, as required, machine the slewing track mounting surface, pin holes, and the track surfaces for the side rollers and lifting baffles on the main beam of the door legs;

[0009] Steps 1-3: Arrange the rotary track and install the needle pin;

[0010] Steps 1-4: Draw a horizontal line on the door leg main beam box body with the slewing track installation plane as the reference, measure the height difference between the lower plane of the door leg main beam and the leg welding part and the horizontal line, and record it;

[0011] Steps 1-5: Install platform railings;

[0012] Step 2: trimming the sea and land side door leg margins;

[0013] Step 2-1: The assembly site is selected within the range of heavy-duty wharf gantry crane and floating crane;

[0014] Step 2-2: Place a pitting plate on the ground, pad it with steel plates, level it with a laser, and then mark it;

[0015] Step 2-3: Use a laser theodolite to mark the symmetrical centerline of the sea-side and land-side door legs on the ground. Using the symmetrical centerline as a reference, mark the ground box centerline and the I-beam centerline of the sea-side and land-side door legs on the ground. Also mark the box centerline on the sea-side and land-side door legs.

[0016] Step 2-4: Arrange the tire frame and place the sea and land side door legs horizontally on the tire frame;

[0017] Step 2-5: After adjusting the verticality and horizontality of the sea and land side door leg box, use a plumb line to align the box center line drawn on the sea and land side door leg box with the symmetrical center line drawn on the ground and the box center line on the ground to ensure the opening size;

[0018] Step 2-6: Using the centerline of the sea-side door leg box and the height difference between the lower plane of the door leg main beam and the leg welding point from the horizontal line as a reference, mark and cut the allowance at the joint with the door leg main beam. Using the centerline of the sea-side door leg box as the inspection line, punch holes on the webs on both sides of the sea-side door leg for marking;

[0019] Step 2-7: Install the process platform;

[0020] Step 3: Hoist the sea and land side door legs;

[0021] Step 3-1: Draw the rotation center line of the door leg main beam on the heavy-duty dock site and mark the rotation center position on the ground;

[0022] Step 3-2: Using the rotation centerline as a reference, draw the base moment line and the sea and land side door leg opening lines on the ground, and double-check the diagonal dimensions;

[0023] Step 3-3: Arrange the tire frame, lay the pitted board on the ground, and use the laser to align the upper surface of the tire frame to the same level;

[0024] Step 3-4: Hoist the land-sea door legs and place them vertically on the tire frame. Adjust the verticality and horizontality of the land-sea door leg box according to the punching holes on the land-sea door legs. Use a plumb line to align the center line of the land-sea door leg box with the base line drawn on the ground to ensure the opening size.

[0025] Step 3-5: Install the process platform, hoist the sea and land side door legs into place and pull the wave and wind ropes;

[0026] Step 4: Hoist the door leg main beam;

[0027] Step 4-1: Arrange the gantry frame between the sea and land side gantry legs, and hoist the gantry leg main beam onto the gantry frame based on the slewing centerline and the slewing track processing surface;

[0028] Step 4-2: Assemble and weld the sea and land side door legs and the door leg main beam;

[0029] Step 5: Install and process the traveling support of the trolley;

[0030] Step 5-1: Mark and process the travel support shaft hole based on the slewing centerline of the door leg main beam and the slewing track processing surface;

[0031] Step 5-3: Use process bolts to connect the trolley travel support and the door leg.

[0032] Furthermore, when arranging the revolving track in steps 1-3, the flatness of the upper surface of the revolving track is required to be controlled within the range of ±1mm / 2m.

[0033] Furthermore, in steps 2-4, the tire frame below the sea and land side door legs is required to be aligned with the inner partition of the sea and land side door leg box and must not be pressed against the free edge of the box.

[0034] Furthermore, in step 3-2, the diagonal dimension error is required to be controlled within ±3 mm.

[0035] Furthermore, in step 4-1, it is required that the position deviation between the rotation center of the door leg main beam and the rotation center line is less than 1 mm.

[0036] The advantages of the present invention are:

[0037] Before assembling the sea and land side door legs and the door leg main beam, the present invention uses the box center line marked on the sea and land side door leg box and the height difference between the lower plane of the door leg main beam and the support leg welding position from the horizontal line as a reference, and marks and cuts the margin at the joint of the sea and land side door legs and the door leg main beam, avoiding the situation that size mismatches and repeated corrections are required when assembling the sea and land side door legs and the door leg main beam, thereby improving the assembly efficiency. When assembling the sea and land side door legs and the door leg main beam, when assembling the door leg main beam and the sea and land side door legs, and when installing and processing the trolley walking support, the rotation center line and the rotation track processing surface are used as a reference, thereby improving the assembly accuracy of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Figure 1 It is the front view of the metal processing of the door leg main beam in the present invention.

[0040] Figure 2 It is a top view of the metal processing of the door leg main beam of the present invention.

[0041] Figure 3 This is a front view of the sea and land side door leg margin trimming of the present invention.

[0042] Figure 4 It is a top view of the sea and land side door leg margin trimming of the present invention.

[0043] Figure 5 It is a front view of the hoisting sea and land side door legs of the present invention.

[0044] Figure 6 It is a top view of the hoisting sea and land side door legs of the present invention.

[0045] Figure 7 It is a front view of the hoisting door leg main beam of the present invention.

[0046] Figure 8 It is a top view of the hoisting door leg main beam of the present invention.

[0047] Figure 9 This is a schematic diagram of the installation and processing of the trolley travel support according to the present invention.

[0048] Figure 10 It is a cross-sectional view in the PP direction of the present invention. DETAILED DESCRIPTION

[0049] The following embodiments may enable those skilled in the art to more fully understand the present invention, but the present invention is not limited to the scope of the embodiments.

[0050] The present invention provides a rotary ship loader door leg assembly process, comprising the following steps:

[0051] Step 1: Metal processing of door leg main beam, such as Figure 1-2 As shown;

[0052] Step 1-1: Arrange six cylindrical tire frames 1, transport the door leg main beam to the outside site, place it on the tire frames 1, and adjust the level with a jack;

[0053] Step 1-2: Mark the entire structure and, as required, machine the slewing track installation plane 2, pin holes, and the track surfaces for the side rollers and lifting baffles on the main beam of the door legs;

[0054] Step 1-3: Install the rotary track 3. The flatness of the upper surface of the rotary track is required to be controlled within the range of ±1mm / 2m. Install the pin 4.

[0055] Steps 1-4: Draw a horizontal line 5 on the door leg main beam box body with the slewing track installation plane 2 as the reference. Measure the height difference between the lower plane of the door leg main beam and the leg welding part and the horizontal line 5, and record it.

[0056] Steps 1-5: To facilitate construction, install the platform railings in place;

[0057] Step 2: trim the sea and land side door leg margins, such as Figure 3-4 As shown;

[0058] Step 2-1: The assembly site is selected within the range of heavy-duty wharf gantry crane and floating crane;

[0059] Step 2-2: Arrange the pitting plate 6 on the ground, pad it with steel plates, level it with laser, and then mark it;

[0060] Step 2-3: Use a laser theodolite to mark the symmetrical centerline 7 of the sea-side and land-side door legs on the ground. Using the symmetrical centerline 7 as a reference, mark the ground box centerline 8 and the I-beam centerline 9 of the sea-side and land-side door legs on the ground. Also mark the box centerline on the sea-side and land-side door legs.

[0061] Step 2-4: Arrange four cylindrical tire frames and place the sea and land side door legs horizontally on the tire frames. The tire frames below the sea and land side door legs must be aligned with the inner partitions of the sea and land side door leg box and must not hit the free edge of the box;

[0062] Step 2-5: After adjusting the verticality and horizontality of the sea and land side door leg box, use a plumb line to align the box center line drawn on the sea and land side door leg box with the symmetrical center line 7 drawn on the ground and the ground box center line 8 to ensure the opening size;

[0063] Step 2-6: Using the centerline of the sea-land side door leg box and the height difference between the lower plane of the door leg main beam and the leg welding position from the horizontal line 5 as a reference, mark and cut the allowance at the joint with the door leg main beam. Using the centerline of the sea-land side door leg box as the inspection line, punch holes 10 on the webs on both sides of the sea-land side door legs as marks;

[0064] Step 2-7: Install the process platform;

[0065] Step 3: Hoist the sea and land side door legs, such as Figure 5-6 As shown;

[0066] Step 3-1: Draw the rotation center line of the door leg main beam on the heavy-duty dock site and mark the rotation center position 11 on the ground;

[0067] Step 3-2: Using the rotation centerline as a reference, draw the base moment line 12 and the sea and land side door leg opening line 13 on the ground, and double-check the diagonal dimensions. The diagonal dimension error must be controlled within ±3mm.

[0068] Step 3-3: Arrange four cylindrical tire frames, lay pitted boards on the ground, and use laser to align the upper surfaces of the tire frames to the same level;

[0069] Step 3-4: Hoist the land-sea door legs and place them vertically on the tire frame. Adjust the verticality and horizontality of the land-sea door leg box according to the sample punching holes 10 on the land-sea door legs. Use a plumb line to align the center line of the land-sea door leg box with the base line 12 drawn on the ground to ensure the opening size.

[0070] Step 3-5: Install the process platform 14, hoist the sea and land side door legs into place, and then pull the wind ropes 15 on both sides of the sea and land side door legs;

[0071] Step 4: Hoist the door leg main beam, such as Figure 7-8 As shown;

[0072] Step 4-1: Arrange four cradles between the sea and land side portal legs. Using the slewing centerline and the slewing track machining surface as reference, hoist the portal leg main beam onto the cradles. The position deviation between the slewing centerline and the slewing centerline must be less than 1mm to ensure the opening size of the slewing centerline.

[0073] Step 4-2: Assemble and weld the sea and land side portal legs to the portal leg main beam. The assembly must meet the main structure deflection requirements of the portal legs.

[0074] Step 5: Install and process the trolley travel support 16, as shown in the following example: Figure 9-10 As shown;

[0075] Step 5-1: Mark and process the travel support shaft hole based on the slewing centerline of the door leg main beam and the slewing track processing surface;

[0076] Step 5-3: Use process bolts to connect the trolley travel support 16 to the door leg.

[0077] Before assembling the sea and land side door legs and the door leg main beam, the present invention uses the box center line marked on the sea and land side door leg box and the height difference between the lower plane of the door leg main beam and the support leg welding position from the horizontal line as a reference, and marks and cuts the margin at the joint of the sea and land side door legs and the door leg main beam, avoiding the situation that size mismatches and repeated corrections are required when assembling the sea and land side door legs and the door leg main beam, thereby improving the assembly efficiency. When assembling the sea and land side door legs and the door leg main beam, when assembling the door leg main beam and the sea and land side door legs, and when installing and processing the trolley walking support, the rotation center line and the rotation track processing surface are used as a reference, thereby improving the assembly accuracy of the components.

[0078] Those skilled in the art will appreciate that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary ship loader door leg assembly process, characterized by: The following steps are involved: Step 1: Metal processing of door leg main beam; Step 1-1: Arrange the tire frame, transport the door leg main beam to the outside site, place it on the tire frame, and adjust the level with a jack; Step 1-2: Mark the entire structure and, as required, machine the slewing track mounting surface, pin holes, and the track surfaces for the side rollers and lifting baffles on the main beam of the door legs; Steps 1-3: Arrange the rotary track and install the needle pin; Steps 1-4: Draw a horizontal line on the door leg main beam box body with the slewing track installation plane as the reference, measure the height difference between the lower plane of the door leg main beam and the leg welding part and the horizontal line, and record it; Steps 1-5: Install platform railings; Step 2: trimming the sea and land side door leg margins; Step 2-1: The assembly site is selected within the range of heavy-duty wharf gantry crane and floating crane; Step 2-2: Place a pitting plate on the ground, pad it with steel plates, level it with a laser, and then mark it; Step 2-3: Use a laser theodolite to mark the symmetrical centerline of the sea-side and land-side door legs on the ground. Using the symmetrical centerline as a reference, mark the ground box centerline and the I-beam centerline of the sea-side and land-side door legs on the ground. Also mark the box centerline on the sea-side and land-side door legs. Step 2-4: Arrange the tire frame and place the sea and land side door legs horizontally on the tire frame; Step 2-5: After adjusting the verticality and horizontality of the sea and land side door leg box, use a plumb line to align the box center line drawn on the sea and land side door leg box with the symmetrical center line drawn on the ground and the box center line on the ground to ensure the opening size; Step 2-6: Using the centerline of the sea-side door leg box and the height difference between the lower plane of the door leg main beam and the leg welding point from the horizontal line as a reference, mark and cut the allowance at the joint with the door leg main beam. Using the centerline of the sea-side door leg box as the inspection line, punch holes on the webs on both sides of the sea-side door leg for marking; Step 2-7: Install the process platform; Step 3: Hoist the sea and land side door legs; Step 3-1: Draw the rotation center line of the door leg main beam on the heavy-duty dock site and mark the rotation center position on the ground; Step 3-2: Using the rotation centerline as a reference, draw the base moment line and the sea and land side door leg opening lines on the ground, and double-check the diagonal dimensions; Step 3-3: Arrange the tire frame, lay the pitted board on the ground, and use the laser to align the upper surface of the tire frame to the same level; Step 3-4: Hoist the land-sea door legs and place them vertically on the tire frame. Adjust the verticality and horizontality of the land-sea door leg box according to the punching holes on the land-sea door legs. Use a plumb line to align the center line of the land-sea door leg box with the base line drawn on the ground to ensure the opening size. Step 3-5: Install the process platform, hoist the sea and land side door legs into place and pull the wave and wind ropes; Step 4: Hoist the door leg main beam; Step 4-1: Arrange the gantry frame between the sea and land side gantry legs, and hoist the gantry leg main beam onto the gantry frame based on the slewing centerline and the slewing track processing surface; Step 4-2: Assemble and weld the sea and land side door legs and the door leg main beam; Step 5: Install and process the traveling support of the trolley; Step 5-1: Mark and process the travel support shaft hole based on the slewing centerline of the door leg main beam and the slewing track processing surface; Step 5-3: Use process bolts to connect the trolley travel support and the door leg.

2. The rotary ship loader door leg assembly process according to claim 1, characterized in that: When arranging the revolving rail in steps 1-3, the flatness of the upper surface of the revolving rail is required to be controlled within the range of ±1mm / 2m.

3. The rotary ship loader door leg assembly process according to claim 1, characterized in that: In steps 2-4, the tire frame below the sea and land side door legs must be aligned with the inner partition of the sea and land side door leg box and must not be pressed against the free edge of the box.

4. The rotary ship loader door leg assembly process according to claim 1, characterized in that: In step 3-2, the diagonal dimension error is required to be controlled within ±3 mm.

5. The rotary ship loader door leg assembly process according to claim 1, characterized in that: In step 4-1, the position deviation between the rotation center of the door leg main beam and the rotation center line is required to be less than 1 mm.

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