A method for manufacturing a door frame of a double-trolley shore container crane

Abstract

The present invention discloses a method for manufacturing a door frame of a double-trolley shore container crane, comprising the following steps: S1, pre-setting an assembly gap for anti-deformation of the free edge of the wing plate on the rail beam; S2, marking three reference measurement points of the center line of the sea and land sides on the column in the column assembly stage; S3, correcting and adjusting the verticality of the column in the three-sided forming and welding stage; S4, arranging the adjustment horizontal reference of the column in the four-sided forming and welding stage; S5, measuring the straightness of the sea and land sides of the column; S6, measuring the process requirements of the column in the 90° stage of the column turning over; S7, trimming the margin of the column and installing the flange plate in the 90° stage of the column turning over again; S8, assembling the left and right door frames. The present invention improves the accuracy of the structure of each component by formulating the requirements of marking, measuring and inspecting the door frame structure, and ensures that the double-trolley shore crane door frame is accurately assembled in place at one time.

Description

Technical Field

[0001] The invention relates to a door frame structure assembly technology of a quay crane of port machinery, and more specifically to a door frame manufacturing method of a double-trolley quay container crane. Background Art

[0002] As the manufacturing technology of dual-trolley automated quayside container cranes (hereinafter referred to as "dual-trolley quayside cranes") gradually matures, the working mode of dual-trolley quayside cranes has become more popular in ports. Figure 1 and Figure 2 As shown in the figure, the main feature of the steel structure of the double-trolley gantry crane is that the gantry crossbeam of the gantry crane is divided into two parts: the middle crossbeam 1 and the tail crossbeam 2, and as the structural carrier for the gantry trolley to run, the crossbeam is equipped with a track-bearing beam structure (see Figure 2 middle I position).

[0003] For this type of door frame, according to the existing manufacturing and assembly process, the manufacturing precision of the sea side column 3 and the land side column 4 of the door frame is relatively rough. The sea side upper and lower beams are pre-assembled with the sea side column 3, and the land side upper and lower beams are pre-assembled with the land side column 4 to improve the precision of the sea and land side door frame sizes, and then the sea and land side door frames are disassembled, and the left and right side door frames are finally assembled. In view of the particularity of the double trolley door frame, the pre-assembly process of the sea and land side door frames increases the workload of assembly, prolongs the assembly cycle of the door frame, and occupies assembly site resources. Summary of the invention

[0004] In view of the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a method for manufacturing the door frame of a double-trolley shore container crane, by formulating requirements for marking, measuring and inspecting the door frame structure, improving the accuracy of the structure of each component, eliminating the method of pre-assembly of the sea and land side door frames, and ensuring that the double-trolley shore crane door frame is accurately assembled in place at one time.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A method for manufacturing a door frame of a double-trolley shore container crane comprises the following steps:

[0007] S1. Pre-place anti-deformation assembly clearance on the free edge of the wing plate on the rail beam;

[0008] S2. At the column assembly stage, three reference measurement points of the center line in the sea and land directions are marked on the column;

[0009] S3. After the three-side forming welding, the verticality of the column is corrected and adjusted;

[0010] S4. Arranging the adjustment level reference of the column after four-side forming welding;

[0011] S5. measuring the straightness of the column in the sea and land directions;

[0012] S6. When the column is turned over 90°, measuring the process requirements of the column;

[0013] S7, when the column is turned over again by 90 degrees, trimming the margin of the column and installing the flange plate;

[0014] S8. Assemble the left and right door frames.

[0015] Preferably, in step S1, a 6mm±0.5mm anti-deformation assembly gap is pre-placed on the free edge of the wing plate on the track-bearing beam.

[0016] Preferably, in step S2, the three reference measurement points are respectively an upper measurement point a, a connecting beam measurement point b and a lower measurement point c.

[0017] Preferably, the step S3 further comprises:

[0018] Taking the center line of the butt joint position of the connecting beam on the column as the reference, the verticality of the web of the column is hoisted, and the out-of-tolerance size is corrected and adjusted before the cover plate is welded.

[0019] Preferably, the step S4 further comprises:

[0020] Place the column on the frame, use laser to calibrate the level, adjust the position of the frame, and use a line to hang the center line of the column and the connecting beam to ensure that the interface center of the connecting beam is vertical, which serves as the horizontal reference for adjusting the column.

[0021] Preferably, the step S5 further comprises:

[0022] Taking the connecting line between the upper measuring point a and the lower measuring point c as a reference, the deviation of the measuring point at the center line position of the connecting beam relative to the measuring point b of the connecting beam is not greater than 3 mm.

[0023] Preferably, the step S6 further comprises:

[0024] Adjust the upper measuring point a and the lower measuring point c to the same level, measure and adjust the lateral bending of the left and right sides of the column to meet the design requirements, and control the height difference between the upper and lower ends of the column to not exceed 3mm and the distortion to not exceed 8mm;

[0025] The verticality deviation between the rail-bearing beam panel of the column and the center line of the column does not exceed 2.5 mm.

[0026] Preferably, the step S7 further comprises:

[0027] Adjust the level of the tire frame, re-measure the straightness of the center line of the sea and land sides of the column, and the verticality between the column and the rail beam panel meet the requirements, then trim the excess and install the flange plate.

[0028] Preferably, the step S8 further comprises:

[0029] By increasing the precise control of the measurement, marking and inspection requirements of the key dimensions of the structure, the pre-assembly steps of the sea and land side door frames in the field are eliminated; the details are as follows:

[0030] 1) Improve the straightness accuracy of the center line of the column structure;

[0031] 2) Improve the vertical accuracy of the center line of the column and the center line of the interface of the connecting beam;

[0032] 3) The parallelism accuracy of the support beam of the column and the center line of the crossbeam;

[0033] 4) The height opening accuracy of the rail beam panel on the column and the center line of the cross beam;

[0034] The tail crossbeam is assembled by reserving the assembly camber.

[0035] The method for manufacturing a door frame of a double-trolley shore container crane provided by the present invention has the following beneficial effects:

[0036] 1) The door frame manufacturing method of the present invention improves the structural accuracy of door frame columns and beam structural components;

[0037] 2) The door frame manufacturing method of the present invention eliminates the pre-assembly process of the sea and land side door frame structures, saving pre-assembly costs, resources and time;

[0038] 3) The improvement of the structural accuracy of each component of the door frame manufacturing method of the present invention ensures the accuracy of the door frame being assembled in place at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the existing double-trolley automated quay crane door frame structure;

[0040] Figure 2 yes Figure 1 Schematic diagram of the middle AA direction;

[0041] Figure 3 It is a schematic flow chart of the door frame manufacturing method of the present invention;

[0042] Figure 4 is a schematic diagram of step S1 in the door frame manufacturing method of the present invention (i.e. Figure 2 Schematic diagram of the enlarged position I in the figure);

[0043] Figure 5is a schematic diagram of step S4 in the door frame manufacturing method of the present invention;

[0044] Figure 6 yes Figure 5 Schematic diagram of the P direction;

[0045] Figure 7 is a schematic diagram of step S5 in the door frame manufacturing method of the present invention;

[0046] Figure 8 is a schematic diagram of step S6 in the door frame manufacturing method of the present invention;

[0047] Fig. 9 yes Figure 8 Schematic diagram of the middle Q direction;

[0048] Fig.10 It is a schematic diagram of step S8 in the door frame manufacturing method of the present invention. DETAILED DESCRIPTION

[0049] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0050] Combination Figure 3 As shown, a method for manufacturing a door frame of a double-trolley shore container crane provided by the present invention comprises the following steps:

[0051] S1. Pre-place anti-deformation assembly clearance on the free edge of the wing plate on the rail beam;

[0052] S2. During the column assembly stage, mark three reference measurement points on the centerline of the sea and land sides on the columns;

[0053] S3. After the three-sided forming welding, correct and adjust the verticality of the column;

[0054] S4. After the four-sided forming welding, arrange the horizontal reference of the column adjustment;

[0055] S5. Measure the straightness of the column on the sea and land sides;

[0056] S6. Measure the process requirements of the column when the column is turned over 90°;

[0057] S7. When the column is turned over 90° again, trim the margin of the column and install the flange plate;

[0058] S8. Assemble the left and right door frames.

[0059] Combination Figure 4As shown, in step S1, the rail-supporting beams (including the straight web 10 and the inclined web 11) of the middle crossbeam 1 and the tail crossbeam 2 on the door frame structure of the double-trolley quay crane are manufactured, and the deformation of the wing plate 12 caused by welding shrinkage is eliminated by pre-setting an anti-deformation assembly gap h of 6mm±0.5mm on the free edge of the wing plate 12 on the rail-supporting beam.

[0060] Combination Figure 6 As shown, in step S2, after the bottom plate and the face plate of the column are spliced ​​and welded, three reference measurement points of the center line 13 in the sea and land directions are marked on the column: the upper measurement point a, the connecting beam measurement point b and the lower measurement point c.

[0061] Step S3 further comprises:

[0062] Taking the center line of the interface of the connecting beam on the column as the reference, the verticality of the web of the column is adjusted and any excess size is corrected before welding the cover plate.

[0063] Combination Figure 5 As shown, step S4 further includes:

[0064] Place the column on the frame 14, use laser to calibrate the level, adjust the position of the frame 14, and use a line to hang the center line of the column and the connecting beam to ensure that the center of the interface of the connecting beam is vertical, which serves as the horizontal reference for adjusting the column.

[0065] Combination Figure 7 As shown, step S5 further includes:

[0066] Taking the connecting line of the upper measuring point a and the lower measuring point c as the reference, the deviation of the measuring point 15 at the center line position of the connecting beam relative to the measuring point b of the connecting beam is not greater than 3 mm.

[0067] Combination Figure 8 and Fig. 9 As shown, step S6 further includes:

[0068] Adjust the upper measuring point a and the lower measuring point c to the same level, measure and adjust the lateral bending of the left and right sides of the column to meet the design requirements, and control the height difference between the upper and lower ends of the column to not exceed 3mm, and the distortion to not exceed 8mm;

[0069] The verticality deviation between the support beam panel of the column and the center line of the column shall not exceed 2.5mm.

[0070] Combination Figure 5 and Figure 6 As shown, step S7 further includes:

[0071] Adjust the tire frame 14 to be level, re-measure the straightness of the center line 13 of the sea and land sides of the column, and the verticality between the column and the rail beam panel to meet the requirements, then mark, trim the allowance, and install the flange plate according to the process requirements.

[0072] Combination Fig.10 As shown, step S8 further includes:

[0073] When the door frame components are manufactured in the workshop, the precise control of the key structural dimensions, measurement, marking and inspection requirements is increased, and the pre-assembly steps of the sea and land side door frames in the field are eliminated, so that the left and right side door frames can be directly assembled in place; the details are as follows:

[0074] 1) Improve the straightness accuracy of the center line of the column structure;

[0075] 2) Improve the vertical accuracy of the center line of the column and the center line of the interface of the connecting beam;

[0076] 3) The parallelism accuracy of the support beam of the column and the center line of the crossbeam;

[0077] 4) The height opening accuracy of the rail beam panel on the column and the center line of the cross beam;

[0078] The tail crossbeam is assembled with reserved assembly arch to ensure the accuracy of the finished product.

[0079] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A method for manufacturing a door frame of a double-trolley shore container crane, characterized in that: The following steps are involved: S1. Pre-place anti-deformation assembly clearance on the free edge of the wing plate on the rail beam; S2. At the column assembly stage, three reference measurement points of the center line in the sea and land directions are marked on the column; S3. After the three-side forming welding, the verticality of the column is corrected and adjusted; S4. Arranging the adjustment level reference of the column after four-side forming welding; S5. measuring the straightness of the column in the sea and land directions; S6. When the column is turned over 90°, measuring the process requirements of the column; S7, when the column is turned over again by 90 degrees, trimming the margin of the column and installing the flange plate; S8, assemble the left and right door frames, In step S1, a 6mm±0.5mm anti-deformation assembly gap is pre-placed on the free edge of the wing plate on the rail support beam. In step S2, the three reference measurement points are respectively the upper mouth measurement point a, the connection beam measurement point b and the lower mouth measurement point c. The step S3 further comprises: Taking the center line of the interface of the connecting beam on the column as the reference, the verticality of the web of the column is hoisted, and the out-of-tolerance size is corrected and adjusted before welding the cover plate. The step S4 further comprises: Place the column on the tire frame, use laser to calibrate the level, adjust the position of the tire frame, and use a line to hang the center line of the column and the connecting beam to ensure that the interface center of the connecting beam is vertical, which serves as the horizontal adjustment reference of the column. The step S5 further comprises: Taking the connecting line of the upper measuring point a and the lower measuring point c as the reference, the deviation of the measuring point at the center line position of the connecting beam relative to the measuring point b of the connecting beam is not greater than 3 mm. The step S7 further comprises: Adjust the level of the tire frame, re-measure the center line straightness of the sea and land sides of the column, and the verticality between the column and the rail beam panel to meet the requirements, then trim the margin and install the flange plate. The step S8 further comprises: By increasing the precise control of the measurement, marking and inspection requirements of key structural dimensions, the pre-assembly steps of the sea and land side door frames in the field are eliminated; The tail crossbeam is assembled by reserving the assembly camber.

2. The method for manufacturing a door frame of a double-trolley shore container crane according to claim 1, characterized in that: The step S6 further comprises: Adjust the upper measuring point a and the lower measuring point c to the same level, measure and adjust the lateral bending of the left and right sides of the column to meet the design requirements, and control the height difference between the upper and lower ends of the column to not exceed 3mm and the distortion to not exceed 8mm; The verticality deviation between the rail-bearing beam panel of the column and the center line of the column does not exceed 2.5 mm.

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