Ladder frame erecting pre-assembling method and port crane

Abstract

The present application provides a kind of ladder frame erecting pre-assembly method and port crane, the method comprises the following steps: S1, the rear beam assembly is adjusted to horizontal state;S2, the place component is marked with sample punching;S3, install outer guide plate;S4, erect pre-assembled ladder frame, determine the cutting allowance of ladder frame support pipe lower mouth;S5, cut the allowance of ladder frame support pipe lower mouth, and install steel gasket, assemble ladder frame;S6, retest data after assembly, data meet the quality control index requirements, then carry out assembly welding.The present application can meet the conditions of operability, practicality, safe construction, the ladder frame is quickly pre-assembled with the upper cross beam on the sea side in the erecting state, improves the assembly quality of port crane, and different machine number components have interchangeability.

Description

Technical Field

[0001] This invention relates to the field of large port crane technology, specifically to a method for pre-assembling a trapezoidal frame and a port crane. Background Technology

[0002] As an important component connecting the front and rear beams of large port cranes, the trapezoidal frame has the characteristics of high load-bearing capacity and high rigidity. After the trapezoidal frame is assembled with the upper crossbeam on the sea side, its dimensions and geometric tolerances must meet the relevant quality control indicators of large structure assembly. Its assembly quality directly affects the installation of the front and rear tie rods of the trapezoidal frame and the accurate matching between the pitch structure of the front beam and the safety hook on the trapezoidal frame.

[0003] Normally, when the ground is level, the trapezoidal frame structure and the seaside upper crossbeam are pre-assembled or matched in size simulation, and their relationship is a one-to-one size fit. However, during the project assembly, the trapezoidal frame was unexpectedly damaged. In order to reduce the time occupied by the general assembly site, pre-made trapezoidal frames of different sizes were used to assemble with the seaside upper crossbeam.

[0004] In view of this, the inventors of this application have designed a method for pre-assembling a trapezoidal frame and a port crane in order to overcome the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defect in the prior art where the trapezoidal frame structure and the crossbeam on the sea side are pre-assembled or dimensionally simulated in a horizontal state on the ground, and their relationship is a one-to-one dimensional matching relationship. However, during the project assembly and implementation, the trapezoidal frame is accidentally damaged. The present invention provides a method for pre-assembling a trapezoidal frame and a port crane.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] This invention provides a method for pre-assembling a trapezoidal frame, characterized by the following steps: S1, adjusting the rear beam assembly to a horizontal state; S2, marking the top-to-bottom square components with punch marks; S3, installing the outer guide plate; S4, erecting the pre-assembled trapezoidal frame and determining the trimming allowance at the bottom of the trapezoidal frame support tubes; S5, trimming the allowance at the bottom of the trapezoidal frame support tubes, installing steel pads, and assembling the trapezoidal frame; S6, re-measuring the assembled data, and after the data meets the quality control requirements, performing assembly and welding.

[0008] According to one or more embodiments of the present invention, step S1 includes the step: S 11 Using the hinge point of the main beam, the lower plane of the left and right side bearing beam flanges of the sea-side upper crossbeam and the land-side upper crossbeam as a reference, adjust the overall level of the main beam and the sea-side upper crossbeam; S 12Verify the horizontal centerline and vertical centerline of the upper crossbeam on the sea side.

[0009] According to one or more embodiments of the present invention, step S2 includes the step: S 21 Draw the outer circle outline on the false flange surface of the round-and-square component of the upper crossbeam on the sea side, using the position of the stiffening plate of the round-and-square component as a reference; S 22 Set cross center punch marks at the four quadrant points of the outer circle outline.

[0010] According to one or more embodiments of the present invention, the four quadrant points are the highest point, the lowest point, and two intermediate points.

[0011] According to one or more embodiments of the present invention, in step S3, the outer guide plate is installed between the midpoint and the lowest point of the outer circular contour line.

[0012] According to one or more embodiments of the present invention, step S4 includes the step: S 41 The trapezoidal frame is lifted as a whole, aligning its vertical centerline with the vertical centerline of the upper crossbeam on the sea side. The horizontal adjustment devices on both sides of the round-and-square structure are then used to level the crossbeam's horizontal centerline. Finally, the wave ropes are adjusted to ensure the trapezoidal frame's vertical centerline is vertical. 42 Using the dummy flange face of the round-and-square component as a reference, draw the cutting line and inspection line of the lower end allowance of the trapezoidal support pipe parallel to the highest and lowest points of the dummy flange face of the round-and-square component.

[0013] According to one or more embodiments of the present invention, step S5 includes step S: 51 Trim the excess material of the trapezoidal support pipe along the cutting line and create the welding bevel; S 52 Install steel linings, ensuring that the gap between the steel linings and the support pipes is uniform and tight. The steel linings should extend approximately 10mm, with a deviation of less than or equal to 1mm.

[0014] According to one or more embodiments of the present invention, the re-measured assembled data in step S6 includes: alignment data of the vertical center line of the trapezoidal frame and the vertical center line of the upper crossbeam on the sea side, alignment data of the reinforcing bars of the trapezoidal frame support tube and the round-and-square component of the upper crossbeam on the sea side, gap data of the steel liner of the trapezoidal frame support tube and the false flange mating surface of the round-and-square component, and verticality data of the trapezoidal frame in the sea side direction and the land side direction.

[0015] The present invention also provides a port crane, characterized in that the trapezoidal frame of the port crane is assembled using the trapezoidal frame erection pre-assembly method described above.

[0016] The positive and progressive effects of this invention are as follows:

[0017] The trapezoidal frame pre-assembly method and port crane of the present invention have at least the following advantages:

[0018] The trapezoidal frame pre-assembly method and port crane of the present invention can meet the conditions of operability, practicality and safe construction. The trapezoidal frame can be quickly pre-assembled with the upper crossbeam on the sea side in the upright state, which improves the assembly quality of the port crane, and the components of different machine sizes are interchangeable. Attached Figure Description

[0019] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same features, wherein:

[0020] Figure 1 This is a schematic diagram of the process flow of a specific embodiment of the trapezoidal frame pre-assembly method of the present invention.

[0021] Figure 2a This is a schematic diagram of adjusting the rear beam assembly to be horizontal in the trapezoidal frame pre-assembly method of the present invention.

[0022] Figure 2b yes Figure 2a A-direction view.

[0023] Figure 2c yes Figure 2b Enlarged view of part I.

[0024] Figure 3a This is a schematic diagram of the punching mark on the round-and-square component in the trapezoidal frame pre-assembly method of the present invention.

[0025] Figure 3b yes Figure 3a Enlarged view of part I.

[0026] Figure 3c yes Figure 3a A-direction view.

[0027] Figure 4a This is a schematic diagram of the installation of the outer guide plate in the trapezoidal frame pre-assembly method of the present invention.

[0028] Figure 4b yes Figure 4a A-direction view.

[0029] Figure 4c yes Figure 4b BB cross-sectional view.

[0030] Figure 5a This is a schematic diagram showing the state in which the vertical center line of the trapezoidal frame and the vertical center line of the upper crossbeam on the sea side have a center deviation after the trapezoidal frame and the upper crossbeam on the sea side are pre-assembled in the pre-assembly method of the trapezoidal frame of the present invention.

[0031] Figure 5b This is a schematic diagram showing the state in which the vertical center line of the trapezoidal frame coincides with the vertical center line of the upper crossbeam on the sea side after the trapezoidal frame and the top-round, bottom-square components of the sea-side upper crossbeam are pre-assembled in the trapezoidal frame pre-assembly method of the present invention.

[0032] Figure 5c This is a schematic diagram showing the positional relationship between the trapezoidal frame and the wave ropes on both sides.

[0033] Figure 6a yes Figure 5b Enlarged view of part I.

[0034] Figure 6b yes Figure 5b Enlarged view of Part II.

[0035] Figure 7a This is a front view schematic diagram of the trimming of the lower end of the trapezoidal frame support tube in the pre-assembly method of the trapezoidal frame erection of the present invention.

[0036] Figure 7b This is a side view schematic diagram of trimming the lower end of the trapezoidal frame support tube in the pre-assembly method of the trapezoidal frame erection of the present invention.

[0037] Figure 7c This is a schematic diagram of the installation of steel pads on one side of the trapezoidal frame support tube in the trapezoidal frame pre-assembly method of the present invention.

[0038] Figure 7d This is a schematic diagram of the installation of steel pads on the other side of the trapezoidal frame support tube in the trapezoidal frame pre-assembly method of the present invention.

[0039] Figure 8a This is a schematic diagram of the assembly of the trapezoidal frame and the top-round, bottom-square component of the upper crossbeam on the sea side in the pre-assembly method of the trapezoidal frame erection of the present invention.

[0040] Figure 8b This is a side view of the trapezoidal frame.

[0041] [Attached image labels]

[0042] Landside upper crossbeam 100

[0043] 200 on the seaside upper crossbeam

[0044] Vertical centerline of the horizontal beam on the sea side 210

[0045] 220° horizontal centerline of the upper crossbeam on the sea side

[0046] Rear beam 300

[0047] Rear beam hinge point 310

[0048] 400 rail bearing beam

[0049] 500 components of a round heaven and a square earth

[0050] Outer circle contour line 510

[0051] 520 ribs for the round-and-square structure

[0052] Cross center punch mark 530

[0053] Guide plate 540

[0054] Inspection line 550

[0055] Trimming line 560

[0056] False flange face 570

[0057] Trapezoidal frame 600

[0058] Vertical centerline of trapezoidal frame 610

[0059] Horizontal centerline of trapezoidal frame beam 620

[0060] Trapezoidal frame crossbeam 630

[0061] Trapezoidal support tube 640

[0062] Trapezoidal rib plate 650

[0063] Steel gasket 660

[0064] Horizontal adjustment device 700

[0065] Left-side horizontal adjustment device 710

[0066] Right-side horizontal adjustment device 720

[0067] Wave Rope 800 Detailed Implementation

[0068] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0069] Embodiments of the invention will now be described in detail with reference to the accompanying drawings. Preferred embodiments of the invention will now be described in detail, examples of which are illustrated in the drawings. Wherever possible, the same reference numerals will be used in all the drawings to denote the same or similar parts. Furthermore, although the terminology used herein is selected from commonly known and used terminology, some terms mentioned in this specification may have been chosen by the applicant at his or her discretion, and their detailed meanings are explained in the relevant sections of the description herein. Moreover, the invention should be understood not only by the actual terms used, but also by the meaning implied by each term.

[0070] This invention provides a method for pre-assembling a trapezoidal frame, the method comprising the following steps:

[0071] Step S1: Adjust the rear beam assembly to a horizontal position;

[0072] Step S2: Mark the center-round-square component 500 with a punch.

[0073] Step S3: Install the outer guide plate 540;

[0074] Step S4: Erect the pre-assembled trapezoidal frame 600 and determine the trimming allowance at the bottom of the trapezoidal frame support tube 640;

[0075] Step S5: Trim the excess material at the bottom of the trapezoidal frame support tube 640, install the steel liner 660, and assemble the trapezoidal frame 600.

[0076] Step S6: Retest the assembled data. Once the data meets the quality control requirements, proceed with assembly and welding.

[0077] Figure 1 The process flow of a specific embodiment of the trapezoidal frame pre-assembly method of the present invention is shown.

[0078] The trapezoidal frame pre-assembly method of the present invention, by rapidly pre-assembling the trapezoidal frame 600 with the upper crossbeam 200 on the sea side while the trapezoidal frame 600 is in an upright state, not only solves the problem of assembly quality, but also solves the problem of interchangeability of components of different machine sizes.

[0079] like Figures 2a-2c As shown, in a preferred embodiment of the trapezoidal frame pre-assembly method of the present invention, step S1 includes the following steps:

[0080] Step S 11 Using the lower plane of the flange of the left and right side bearing beams 400 of the main beam hinge point 310, the sea-side upper crossbeam 200, and the land-side upper crossbeam 100 as a reference, the overall level of the main beam 300 and the sea-side upper crossbeam 200 is adjusted.

[0081] Step S 12 Verify the horizontal centerline 220 and the vertical centerline 210 of the upper crossbeam on the sea side.

[0082] It should be specifically noted that the rear main beam assembly includes the sea-side upper crossbeam 200, the land-side upper crossbeam 100, the rear main beam 300, and the rail-bearing beam 400. Using the lower plane (near the web) of the flange of the left and right rail-bearing beam 400 at the rear main beam hinge point 310, the sea-side upper crossbeam 200, and the land-side upper crossbeam 100 as a reference, the overall level of the rear main beam 300, the sea-side upper crossbeam 200, and other components can be adjusted by measuring and adjusting with a total station.

[0083] Furthermore, by using a total station in conjunction with measuring point P, the horizontal line L1 of the two rail beams at 400 can be adjusted so that the two horizontal lines L1 coincide.

[0084] After leveling all the components of the rear beam assembly, check the horizontal center line of the top crossbeam on the sea side and the vertical center line 210 on the sea side. This can reduce data deviations such as centering and verticality during the pre-assembly and assembly of the trapezoidal frame.

[0085] like Figures 3a-3c As shown, in a preferred embodiment of the trapezoidal frame pre-assembly method of the present invention, step S2 includes the following steps:

[0086] Step S 21 On the false flange surface 570 of the round-and-square component 500 of the upper crossbeam 200 on the sea side, draw the outer circle outline 510 with the position of the stiffening plate 520 of the round-and-square component as the reference.

[0087] Step S 22 Set cross center punch marks 530 at the four quadrant points of the outer circle outline 510.

[0088] Preferably, a cross center punch mark 530 is provided on both the front and back sides of the flange plate.

[0089] like Figures 3a-3c As shown, in a preferred embodiment of the trapezoidal frame pre-assembly method of the present invention, the four quadrant points are the highest point, the lowest point, and two intermediate points.

[0090] like Figures 4a-4c As shown, in a preferred embodiment of the trapezoidal frame pre-assembly method of the present invention, in step S3, the outer guide plate 540 is installed between the midpoint and the lowest point of the outer circular outline 510.

[0091] It should be specifically noted that, in order to ensure that after the trapezoidal frame 600 is erected and assembled, it can be quickly and smoothly introduced onto the dummy flange surface 570 of the round-and-square component 500 during assembly, an outer guide plate 540 is installed between the midpoint and the lowest point of the outer circle outline 510.

[0092] like Figures 5a-6b As shown, in a preferred embodiment of the trapezoidal frame pre-assembly method of the present invention, step S4 includes the following steps:

[0093] Step S 41 The trapezoidal frame 600 is lifted as a whole, so that the vertical center line 610 of the trapezoidal frame coincides with the vertical center line 210 of the upper crossbeam on the sea side. The horizontal adjustment devices 700 on both sides of the round-and-square component 500 are used to adjust the horizontal center line 620 of the crossbeam of the trapezoidal frame to a horizontal state. The wave ropes 800 are adjusted to make the vertical center line 610 of the trapezoidal frame vertical.

[0094] Step S 42 Using the dummy flange face 570 of the round-and-square component 500 as a reference, draw the cutting line and inspection line 550 of the lower end of the trapezoidal support tube 640 parallel to the highest and lowest points of the dummy flange face 570 of the round-and-square component 500.

[0095] like Figure 7a As shown, the trapezoidal frame 600 includes a trapezoidal frame crossbeam 630 and a trapezoidal frame support tube 640.

[0096] It needs to be specifically explained that, such as Figures 5a-5c As shown, first, the trapezoidal frame 600 is erected, and the trapezoidal frame 600 is pre-assembled with the round-and-square component 500 of the upper crossbeam 200 on the sea side. The trapezoidal frame 600 is then lifted as a whole so that the vertical center line 610 of the trapezoidal frame coincides with the vertical center line 210 of the upper crossbeam on the sea side. Figure 5a The vertical centerline 610 of the middle trapezoidal frame deviates from the vertical centerline 210 of the upper crossbeam on the sea side. Figure 5b The diagram shows the adjusted state where the vertical centerline 610 of the trapezoidal frame coincides with the vertical centerline 210 of the upper crossbeam on the sea side. Then, the horizontal centerline 620 of the trapezoidal frame crossbeam is leveled using the horizontal adjustment devices 700 on both sides of the round-and-square component 500. The horizontal adjustment devices 700 include a left horizontal adjustment device 710 and a right horizontal adjustment device 720. The verticality of the vertical centerline 610 of the trapezoidal frame is adjusted using the wave ropes 800 on both sides, ensuring that the trapezoidal frame 600 is perpendicular to both the sea side and the land side.

[0097] like Figures 6a-6b As shown, using the dummy flange face 570 of the round-and-square component 500 as a reference, a cutting line and an inspection line 550 are drawn parallel to the highest and lowest points of the dummy flange face 570 of the round-and-square component 500 at the bottom of the trapezoidal support tube 640. The inspection line 550 is used to inspect the accuracy of the cutting line and the quality of the cut surface after trimming along the cutting line.

[0098] like Figures 7a to 7d As shown, in a preferred embodiment of the trapezoidal frame pre-assembly method of the present invention, step S5 includes the following steps:

[0099] Step S 51 Trim the trapezoidal support tubes by more than 640 mm along the cutting line and make the welding bevel.

[0100] Step S 52 Install steel liner 660, ensuring that the gap between steel liner 660 and support pipe is uniform and tight. The steel liner 660 extends about 10mm, with a deviation of less than or equal to 1mm.

[0101] It should be specifically noted that, according to the cutting line of the lower end of the trapezoidal frame support tube 640 pre-marked by the round-and-square component 500 of the trapezoidal frame 600 and the upper crossbeam 200 on the sea side, the excess of the trapezoidal frame support tube 640 is trimmed on the ground shelf and a welding bevel is made; the gap between the steel liner 660 and the support tube is uniform and tight, the steel liner 660 extends 10mm, the distance is uniform and the deviation is no more than 1mm. Figures 7a to 7d In the embodiment shown, the trapezoidal rib plate 650 and the steel pad 660 need to be installed in place.

[0102] like Figures 8a-8b As shown, in a preferred embodiment of the trapezoidal frame pre-assembly method of the present invention, the assembled data re-measured in step S6 includes: alignment data of the vertical centerline 610 of the trapezoidal frame and the vertical centerline 210 of the upper crossbeam on the sea side; rib alignment data of the trapezoidal frame support tube 640 and the top-round-and-bottom-square component 500 of the upper crossbeam on the sea side; gap data of the fit between the steel pad 660 of the trapezoidal frame support tube 640 and the false flange surface 570 of the top-round-and-bottom-square component 500; and verticality data of the trapezoidal frame 600 in the sea side direction and the land side direction.

[0103] It should be specifically noted that the data after retesting and assembly are used to meet the various quality control indicators of the celestial and terrestrial components 500 of the trapezoidal frame 600 and the sea-side upper crossbeam 200.

[0104] After the trapezoidal frame 600 is assembled, the key data that need to be re-measured include: the alignment data between the vertical centerline 610 of the trapezoidal frame and the vertical centerline 210 of the upper crossbeam on the sea side; the alignment data between the reinforcing bars of the trapezoidal frame support tube 640 and the square-to-top component 500 of the upper crossbeam on the sea side; the gap data between the steel gasket 660 of the trapezoidal frame support tube 640 and the dummy flange face 570 of the square-to-top component 500; and the verticality data of the trapezoidal frame 600 in the sea-land direction.

[0105] Preferably, the gap data between the steel gasket 660 of the trapezoidal frame support tube 640 and the dummy flange face 570 of the round-and-square component 500 can be checked at A1 and A2. The verticality data of the trapezoidal frame 600 in the sea-land direction can be obtained by the verticality of the vertical center line 610 of the trapezoidal frame. After meeting the quality control index requirements, the assembly and welding are completed according to the welding requirements of the drawings.

[0106] The present invention provides a method for pre-assembling a trapezoidal frame. By marking the lower end of the trapezoidal frame support tube 640 with a trimming line 560 and an inspection line 550, the trapezoidal frame 600 can be assembled with the sea-side upper crossbeam 200 after trimming the excess, beveling, and installing padding, thus meeting the relevant quality control indicators for the assembly of the trapezoidal frame 600 and the sea-side upper crossbeam 200.

[0107] As described above, the trapezoidal frame pre-assembly method of the present invention meets the conditions of operability, practicality and safe construction. The trapezoidal frame 600 can be quickly pre-assembled with the upper crossbeam 200 on the sea side in the upright state, which solves the problem of assembly quality and the problem of interchangeability of components of different machine sizes, and provides a new assembly idea.

[0108] The present invention also provides a port crane, wherein the trapezoidal frame 600 of the port crane is assembled using the trapezoidal frame erection pre-assembly method described above.

[0109] In summary, the trapezoidal frame pre-assembly method and port crane of the present invention can meet the requirements of operability, practicality and safe construction. The trapezoidal frame 600 can be quickly pre-assembled with the sea-side upper crossbeam 200 in the upright state, which improves the assembly quality of the port crane, and the components of different machine sizes are interchangeable.

[0110] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A method for pre-assembling a trapezoidal frame, characterized in that, The method includes the following steps: S1. Adjust the rear beam assembly to a horizontal position; S2. Mark the center-round-square-square components with punching marks. Step S2 includes the following steps: S 21 On the false flange surface of the round-and-square component of the upper beam on the sea side, draw the outer circle outline with the position of the stiffening plate of the round-and-square component as the reference. S 22 Set cross-shaped center punch marks at the four quadrant points of the outer circle contour line; the four quadrant points are the highest point, the lowest point, and two intermediate points; S3. Install the outer guide plate; the outer guide plate is installed between the midpoint and the lowest point of the outer circular contour line; S4. Erect the pre-assembled trapezoidal frame and determine the trimming allowance at the bottom of the trapezoidal frame support tube; Step S4 includes the following steps: S 41 The trapezoidal frame is lifted as a whole, so that the vertical center line of the trapezoidal frame coincides with the vertical center line of the upper crossbeam on the sea side. The horizontal adjustment devices on both sides of the round-and-square component are used to adjust the horizontal center line of the trapezoidal frame crossbeam to a horizontal state. The wave ropes are adjusted to make the vertical center line of the trapezoidal frame vertical. S 42 Using the false flange surface of the round-and-square component as a reference, draw the cutting line and inspection line of the lower end of the trapezoidal support pipe parallel to the highest and lowest points of the false flange surface of the round-and-square component. S5. Trim the excess material at the bottom of the trapezoidal frame support tube, install steel pads, and assemble the trapezoidal frame. Step S5 includes the following steps: S 51 Trim the excess material of the trapezoidal support pipe along the cutting line and make the welding bevel; S 52 Install steel linings to ensure that the gap between the steel linings and the support pipes is uniform and tight. The steel linings should extend about 10mm with a deviation of less than or equal to 1mm. S6. Retest the assembled data. Once the data meets the quality control requirements, proceed with assembly and welding. The re-measured assembled data includes: alignment data between the vertical centerline of the trapezoidal frame and the vertical centerline of the upper crossbeam on the sea side; rib alignment data between the trapezoidal frame support tube and the round-and-square component of the upper crossbeam on the sea side; gap data between the steel liner of the trapezoidal frame support tube and the false flange mating surface of the round-and-square component; and verticality data of the trapezoidal frame in the sea side and land side directions.

2. The trapezoidal frame pre-assembly method as described in claim 1, characterized in that, Step S1 includes the following steps: S 11 Using the hinge point of the main beam, the upper crossbeam on the sea side, and the lower plane of the left and right side bearing beam flanges of the upper crossbeam on the land side as the reference, adjust the overall level of the main beam and the upper crossbeam on the sea side. S 12 Verify the horizontal centerline and vertical centerline of the upper crossbeam on the sea side.

3. A port crane, characterized in that, The trapezoidal frame of the port crane is assembled using the trapezoidal frame erection pre-assembly method as described in any one of claims 1-2.

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