Preparation method of travelling trolley for semi-arc girder quay crane

Abstract

The invention discloses a preparation method of a travelling trolley for a semi-arc girder quay crane. The travelling trolley is divided into a plurality of module assemblies; the module assemblies are spliced and manufactured in a forward jacking mode; driving wheel holes are formed in the corresponding module assemblies in a one-time lineation machining mode; and the detachable adjustable support is used for controlling the opening precision in the wheel main plate and the vertical line precision of the lifting pulley main plate after the large-angle inclined suspension beam and the corresponding module assembly are assembled. The extra workload caused by high-altitude size deviation is reduced, and the construction difficulty and the safety risk are reduced.

Description

Technical Field

[0001] The invention relates to a manufacturing technology of a running trolley for port machinery, and more specifically to a method for preparing a running trolley for a semi-circular arc beam quay crane. Background Art

[0002] The semi-circular beam quay crane is a new type of shore container crane that is designed to solve the problem of inland river terminal carrying capacity and reduce the wheel pressure of the terminal by taking advantage of the small wind resistance coefficient of the circular arc section and the light weight of the structure. Figure 1 As shown, since the beam structure 4 on the semi-circular arc beam quay crane is a semi-circular arc section, its running trolley structure is more compact than the conventional double-box beam running trolley, and is in the form of a large-angle inclined suspension beam 3, and a self-driven motor 1 is used to drive the wheels and running track 2 to be upside down on the bottom surface of the circular arc beam of the beam structure 4 for operation.

[0003] The lifting of containers is achieved by running a trolley. During operation, the trolley needs to meet the requirements of frequent, fast and high-load bearing conditions, which puts higher requirements on the manufacturing accuracy of the trolley structure. Since the trolley suspension beam is a large-angle inclined structure, and the four sets of wheels connected to it are arranged horizontally in space, it is crucial to control the manufacturing and assembly methods of the narrow beam body and the coaxiality and parallelism of the wheel holes within the qualified range during the manufacturing, assembly and transportation process. Therefore, it is necessary to design a reasonable construction control method to meet the final operating function of the arc beam running trolley. Summary of the invention

[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide a method for preparing a running trolley for a semi-circular arc beam quay crane, so as to reduce the extra workload caused by dimensional deviation at high altitude and reduce the construction difficulty and safety risks.

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

[0006] A method for preparing a running trolley for a semi-circular arc beam quay crane;

[0007] Divide the running trolley into multiple module components;

[0008] The module components are assembled and manufactured by adopting a positive jacking method;

[0009] A one-time scribing process is used to open a wheel hole on the corresponding module assembly;

[0010] The vertical line accuracy of the opening in the wheel main board and the lifting pulley main board after the large-angle inclined suspension beam is assembled with the corresponding module components by using a detachable adjustable support to control the vertical line accuracy of the opening in the wheel main board and the lifting pulley main board.

[0011] Preferably, the running vehicle is divided into a plurality of module components, specifically including:

[0012] The running trolley is divided into an upper structure, a middle structure and a lower structure;

[0013] Among them, the upper structure and the lower structure are further divided into a trolley driving support, a lifting pulley beam assembly, and a sea-land side connecting beam assembly.

[0014] Preferably, the detachable and adjustable support comprises a horizontal support tube, a plug plate and a positioning base plate;

[0015] The positioning base plates have two pieces, which are respectively welded to the lower openings of the webs of the pulley beams on both sides of the upper structure;

[0016] The plug plates include two pieces, which are respectively plugged into the two ends of the horizontal support tube;

[0017] The plug plates are all connected with waist-shaped pads, and the waist-shaped pads are connected with the corresponding positioning bottom plates through adjustment pads.

[0018] Preferably, fan-shaped sealing plates are provided at both ends of the horizontal support pipe;

[0019] The horizontal support pipe is provided with a lifting lug;

[0020] A longitudinal reinforcing plate is provided on the plug board.

[0021] Preferably, after the main structure of the running trolley is formed, the positioning base plate is respectively welded to the lower opening of the web of the pulley beams on both sides of the upper structure, and 4*M20 threaded through holes are drilled on the positioning base plate;

[0022] The two ends of the horizontal support pipe are provided with notches to install the plug plate, and then welded with the waist-shaped pad to form an assembly;

[0023] The two ends of the horizontal support pipe adopt fan-shaped cross-sections and are sealed by the fan-shaped gasket;

[0024] The horizontal support pipe is hoisted to the interior of the running trolley through the lifting lug, and the waist-shaped pad is connected and fixed to the positioning base plate with M20 bolts;

[0025] The dimensions of the opening direction of the two ends of the horizontal support pipe are adjusted according to the opening of the upper structure by using the adjustment pads with different thicknesses.

[0026] Preferably, a mobile boring machine is used to process four groups of wheel holes on the corresponding module components at one time.

[0027] The present invention provides a method for preparing a running trolley for a semi-circular arc beam quay crane, which has the following advantages:

[0028] Beneficial effects:

[0029] 1) A modular and small component manufacturing method is adopted, and the running trolley is divided into three parts: the upper structure, the middle structure (inclined suspension beam), and the lower structure. The upper structure is divided into the trolley drive support, the lifting pulley beam assembly, and the sea-land side connecting beam assembly according to the product functional characteristics and convenience. They are manufactured separately and the precision dimensions are controlled in advance, which reduces the extra workload caused by dimensional deviation at high altitude, and reduces the construction difficulty and safety risks;

[0030] 2) The large module forward lifting and assembly manufacturing process is adopted to reduce the difficulty of assembling and closing the large-angle inclined suspension beam and effectively control the precision error of the superstructure;

[0031] 3) A one-time marking and boring process was designed, using a high-precision mobile boring machine to process four sets of wheel holes at one time, thus ensuring that the coaxiality, parallelism, verticality and other accuracies of the wheel holes meet the design requirements;

[0032] 4) Design corresponding detachable and adjustable supporting tooling to control the internal gap of the wheel main board and the vertical accuracy of the lifting pulley main board after the large-angle suspension beam is assembled with the upper component. The tooling can be reused to effectively solve the problems of component deformation and uncontrolled dimensional accuracy during manufacturing and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of a trolley running on a semi-circular beam quay bridge;

[0034] Figure 2 It is a schematic diagram of dividing the running trolley into module components in the running trolley preparation method of the present invention;

[0035] Figure 3 yes Figure 2 Schematic diagram of the A direction;

[0036] Figure 4 It is a schematic diagram of a detachable and adjustable support in the method for preparing a running trolley of the present invention;

[0037] Figure 5 Schematic diagram of a wheel main plate and a hoop in an embodiment of a method for preparing a running trolley of the present invention, (a) is a front view of the superstructure, and (b) is a schematic diagram of the E1-E1 direction in (a);

[0038] Figure 6 Schematic diagrams of wheel bearing seats in an embodiment of a method for preparing a running trolley of the present invention, (a) is a schematic diagram of a trolley wheel assembly bearing seat, (b) is a schematic diagram of a lower seat of the bearing seat, and (c) is a schematic diagram of an upper seat of the bearing seat;

[0039] Figure 7Schematic diagram of a lifting pulley beam in an embodiment of a method for preparing a running trolley of the present invention, (a) is a main view, (b) is a schematic diagram of the AA direction in (a), and (c) is a schematic diagram of the b direction in (b);

[0040] Figure 8 Schematic diagram of the lower structure in the embodiment of the method for preparing a running trolley of the present invention, (a) is a main view, (b) is an enlarged schematic diagram of the V part in (a), (c) is a top view of (b), (d) is a schematic diagram of the heavy part in (b), and (e) is a top view of (d);

[0041] Fig. 9 Schematic diagram of the trolley assembly size control in the embodiment of the method for preparing a running trolley of the present invention, (a) is the main view, and (b) is the schematic diagram of the CC direction in (a). DETAILED DESCRIPTION

[0042] 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.

[0043] The present invention provides a method for preparing a running trolley for a semi-circular arc beam quay crane:

[0044] The running trolley is divided into three parts: an upper structure 100, a middle structure 200 (inclined suspension beam), and a lower structure 300. Figure 2 As shown. The upper structure 100 and the lower structure 300 are divided into a trolley drive support 400, a lifting pulley beam assembly 500, and a sea-land side connecting beam assembly 600 according to product functional characteristics and convenience, and are manufactured separately through pre-shrinkage, processing allowance, setting of multiple welding sequences, opening of process holes in a narrow box, and pre-positioning and installation of auxiliary pre-welded parts and detection of precision size control. Finally, the same reference is used to assemble the running trolley in an integrated forward assembly method, which can effectively reduce the extra workload caused by dimensional deviation at high altitudes, and reduce construction difficulty and safety risks.

[0045] Combination Figure 3 As shown, the detachable adjustable support includes a horizontal support tube 10 , a plug plate 20 and a positioning base plate 30 .

[0046] After the main structure of the running trolley is formed, the positioning base plates 30 are respectively welded to the lower openings of the webs of the pulley beams on both sides of the upper structure 100, and 4*M20 threaded through holes are drilled in advance on the positioning base plates 30.

[0047] The intermediate structure 200 is connected by pipes, which is lighter and has higher bending resistance than the I-beam structure. Notches are opened at both ends of the horizontal support pipe 10 to install the plug plate 20, and then welded with the waist-shaped pad 40 to form an assembly.

[0048] The two ends of the horizontal support tube 10 adopt a fan-shaped cross-section, which has a beautiful appearance and reduces stress concentration, and is sealed by a fan-shaped pad 50, which not only solves the problem that the interior of the horizontal support tube 10 cannot be painted and is prone to corrosion, but also the sealed cross-section is more reliable than the open cross-section and is not prone to unstable deformation.

[0049] The horizontal support pipe 10 is hoisted to the inside of the running trolley through the lifting lug 60, and the waist-shaped pad 40 is connected and fixed to the positioning base plate 30 by using the M20 bolt 70. Among them, the waist-shaped pad 40 is provided with a long waist-shaped bolt hole for adjusting the size deviation in the height direction to facilitate rapid positioning and installation on the positioning base plate 30.

[0050] The opening dimensions of both ends of the horizontal support pipe 10 are adjusted according to the opening of the upper structure by using adjustment pads 80 of different thicknesses. The entire support can effectively control the opening dimensions of the upper structure and avoid deformation of the running trolley during transportation and lifting.

[0051] Example

[0052] This embodiment provides a method for preparing a running trolley for a semi-circular arc beam quay crane, which specifically includes:

[0053] 1. Requirements for the production of each module component:

[0054] 1. Manufacturing and processing requirements for trolley wheel drive support:

[0055] (1) When cutting the wheel main plate 24 in the upper structure of the trolley, the inner hole needs to be (φB5+14) mm, and a 25 mm margin is left in the thickness direction of the wheel hoop 25. The outer circle is cut to (φB5+20) mm, and the inner diameter is cut to (φB3-30) mm. The margin is not processed for the time being. Figure 5 As shown;

[0056] (2) When cutting the upper and lower bearing seats, leave a margin. First, process the outer dimensions to the blueprint requirements, and leave a margin for the inner hole without processing. Fit the upper and lower bearing seats together, drill the φD1 through hole of the upper bearing seat and the 2-M (D2) threaded hole of the lower bearing seat, and then connect them with process bolts. Fix the bearing seat connection assembly with the adjustment pad and send it to the machine workshop to process the 4-A*B waist hole (see Figure 6 After completion, install it to the upper structure of the trolley according to the drawing requirements;

[0057] (3) Processing the inner diameter allowance of the wheel main plate 24 to (φB5+24) mm, which is convenient for the subsequent installation of the wheel clamp 25, and then processing the slope and groove according to the requirements of the drawing;

[0058] (4) When the trolley frame is marked once, the wheel clamp 25 is welded to the trolley frame, and the verticality requirement is ensured during the welding process; the bearing seat assembly I is welded to the trolley frame as required after the wheel is assembled, and then the bearing seat assembly I is installed on the trolley frame using process bolts;

[0059] (5) After the clamp is welded and tested, Figure 5 (a) is trimmed and polished appropriately, leaving a 10-15mm margin at the root of the trimming, and at the same time, the notches of the wheel main plate 24 and the wheel hoop 25 are trimmed and polished appropriately, leaving 5mm machining margins on both sides of the notches, which will be processed together when the wheel hole is processed as a whole (see Figure 5 shown).

[0060] 2. Requirements for manufacturing and processing of lifting pulley beams:

[0061] (1) When the pulley main plate 31 in the trolley frame is cut, the inner hole and plate thickness are left with machining allowances, so they are not processed for the time being. The pulley main plate 31, rib plate 32, rib plate 33 are made into lifting pulley support assembly I, the inner pulley support beams 34, 35, 36, 37 are made into lifting pulley beam assembly II, and the outer pulley support beams 34, 36, 38, 39 are made into lifting pulley beam assembly III. According to the dimensions of the drawing, the lifting pulley beam assemblies I to III and the wheel main plate are assembled into a lifting pulley beam (see Figure 7 shown);

[0062] (2) When the trolley frame is marked once, the lifting pulley beam assembly I is welded to the trolley frame according to the requirements of the drawing, and attention is paid to ensuring the requirements for ribs and the verticality during the welding process;

[0063] (3) When marking the trolley frame for the second time, mark the φD1 shaft hole processing line, inspection line and 4-M (D2) threaded hole cross center line on the pulley main plate 1, and mark the plane processing area of ​​the pulley main plate 1 according to the blueprint requirements;

[0064] (4) Boring the φD1 shaft hole, drilling the M (D2) threaded hole, and processing the D3 notch, paying attention to the requirement of smooth transition of the arc at Q, and processing the plane of the pulley main plate 1 so that its opening size meets the requirements of the drawing.

[0065] 3. Requirements for manufacturing and processing of lower structure:

[0066] (1) The lower structure beam is manufactured into a box-type structure in advance according to the drawing requirements. Check the straightness and distortion of the beam body to be less than 3mm. Leave a 50mm margin at both ends for trimming and alignment during assembly;

[0067] (2) To facilitate the welding of the weld between the internal bulkhead and the bottom plate of the beam body, process holes need to be opened on the inner web of the sea and land side beams (3 to 4 holes / set in total); after the internal bulkhead is welded and inspected to be qualified, the holes are sealed with the original cut sealing plates. The sealing plate weld is a single-sided groove liner weld, which is polished and smooth after welding, and subjected to 100% UT+100% MT inspection;

[0068] (3) After the cab hanger is manufactured, draw the cross line of the cab hanger hole, and cut the hole on the rectangular tube 46 to the requirements of the drawing, and the cut part needs to be polished smooth;

[0069] (4) According to the requirements of the drawing, process the weight 47 with a diameter of φd2 and process the sinker with a depth of A and a diameter of φd1;

[0070] (5) Mark the installation position line of the heavy pound 47 according to the drawing size, weld it to the rectangular tube 46, and mark and drill the bolt holes 4-φd3. Pay attention to control the misalignment between the heavy pound 47 and the holes on the rectangular tube 46 within 3 to 5 mm (see Figure 8 shown).

[0071] 2. Requirements for integrated assembly and marking of each module:

[0072] 1. Assembly of running car:

[0073] (1) Place the lower structure on the tire frame and adjust its level to ensure that the level is within 2 mm. Draw the installation position lines of the four sets of middle structures (inclined suspension beams) based on the left and right opening dimensions L1 and the sea and land opening dimensions L2;

[0074] (2) Arrange the pre-designed and manufactured modular construction platform to the corresponding workstation to facilitate the subsequent measurement, adjustment, welding and other work of the mid- and upper structures;

[0075] (3) Use the workshop crane to hoist the prefabricated middle structure (inclined suspension beam) to the upper plane of the lower structure, adjust its opening and vertical line, set up a laser measuring instrument, measure the level of the upper ends of the four sets of middle structures, correct the height of the suspension beam to ensure H1 = H2, and weld the lower end to the lower structure after the size is qualified;

[0076] (4) Assemble the upper structure as a whole with the inclined suspension beam according to the requirements of the drawings. Take the horizontal reference point of the main wheel mainboard position of the upper structure as the reference, adjust the height and opening size of the upper structure and the suspension beam, and perform positioning welding after adjustment. Pay attention to pre-place 6-8mm welding shrinkage allowance in advance. The difference between H1 and H2 is ≤3mm, the upper size of L1 is 4-8mm smaller than the lower size, the diagonal is controlled within ±5mm, and |L5-L6|≤5 (see Fig. 9 shown);

[0077] (5) After the pre-assembly size inspection is passed, install the detachable adjustable support and anti-overturning support to fix the left and right upper structure openings and prevent the upper structure from overturning. Assemble and weld the trolley frame as a whole to ensure that the relevant dimensions of the wheel support plate meet the requirements after welding. If they do not meet the requirements, they need to be calibrated and adjusted according to the actual situation on site to ensure the size requirements.

[0078] 2. Marking and processing of running trolley:

[0079] (1) The main welding work needs to be completed on the overall trolley structure.

[0080] a. The Kama tooling at the contact point between the trolley structure and the tire frame must be completely removed, and the entire structure is in a completely free shelving state;

[0081] b. The entire trolley is adjusted to a horizontal state, and a rigid contact is maintained between the trolley and the tire frame. The use of sleepers is prohibited;

[0082] c. Check and remove in advance the components around the trolley that may hinder marking;

[0083] d. The marking time must be controlled during a period of time with small temperature differences to avoid the influence of bad weather such as sunshine, heavy rain, and high humidity.

[0084] (2) Set up the laser theodolite in the middle of the trolley frame and make sure it is higher than the upper plane of the trolley frame. Adjust the laser level and re-measure the level of the entire trolley frame with the roots of the intersections of the four wheel support plates and the center of the main beam as the reference. Measure the level and adjust it to the best state to ensure that the reference points are on the same horizontal plane.

[0085] (3) Using the horizontal point as the reference, draw the center line, diagonal line and wheel height center line of the trolley, divide the thickness of the four sets of wheel support plates, and use the center line point of the trolley wheel support plate thickness direction as the reference, use a calibrated tape measure with a laser theodolite to measure the wheel gauge, wheel width and diagonal dimensions of the trolley frame and knock on the sample punch mark;

[0086] (4) Using the sample punching point as a reference, mark out the processing and inspection lines of the inner hole, notch, inner groove of the wheel clamp 25, as well as the center line and processing allowance line of the lifting pulley shaft hole and wheel bearing seat assembly hole. The bearing seat assembly needs to be removed separately and sent to the machining workshop for machining of the shaft hole and inner ring groove, and then installed in place when the trolley mechanism is assembled;

[0087] (5) The processing inspection line with the scraped surface size should be led to a place outside the scraped surface to facilitate re-measurement after boring to verify whether the processing size is qualified;

[0088] (6) The trolley structure is transferred to the machining workshop as a whole, and the wheel clamp and lifting pulley holes are processed according to the above-mentioned axle hole processing lines, and the surface is scraped, the groove is processed, and the notch is processed; the wheel clamp flaw detection reserve margin of 10 to 15 mm is also processed in place.

[0089] 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 preparing a running trolley for a semi-circular arc beam quay crane, characterized in that: Divide the running trolley into multiple module components; The module components are assembled and manufactured by adopting a positive jacking method; A one-time scribing process is used to open a wheel hole on the corresponding module assembly; The vertical line accuracy of the opening in the wheel main board and the lifting pulley main board after the large-angle inclined suspension beam is assembled with the corresponding module components by using a detachable adjustable support to control the vertical line accuracy of the opening in the wheel main board and the lifting pulley main board.

2. The method for preparing a running trolley for a semi-circular arc beam quay crane according to claim 1, characterized in that: Dividing the running trolley into a plurality of module components specifically includes: The running trolley is divided into an upper structure, a middle structure and a lower structure; Among them, the upper structure and the lower structure are further divided into a trolley driving support, a lifting pulley beam assembly, and a sea-land side connecting beam assembly.

3. The method for preparing a running trolley for a semi-circular arc beam quay crane according to claim 2, characterized in that: The detachable and adjustable support comprises a horizontal support tube, a plug plate and a positioning bottom plate; The positioning base plates have two pieces, which are respectively welded to the lower openings of the webs of the pulley beams on both sides of the upper structure; The plug plates include two pieces, which are respectively plugged into the two ends of the horizontal support tube; The plug plates are all connected with waist-shaped pads, and the waist-shaped pads are connected with the corresponding positioning bottom plates through adjustment pads.

4. The method for preparing a running trolley for a semi-circular arc beam quay crane according to claim 3 is characterized in that: Sector-shaped sealing plates are provided at both ends of the horizontal support pipe; The horizontal support pipe is provided with a lifting lug; A longitudinal reinforcing plate is arranged on the plug board.

5. The method for preparing a running trolley for a semi-circular arc beam quay crane according to claim 4, characterized in that: After the main structure of the running trolley is formed, the positioning bottom plate is welded to the lower opening of the web of the pulley beams on both sides of the upper structure, and 4*M20 threaded through holes are drilled on the positioning bottom plate; The two ends of the horizontal support pipe are provided with notches to install the plug plate, and then welded with the waist-shaped pad to form an assembly; The two ends of the horizontal support pipe adopt fan-shaped cross-sections and are sealed by the fan-shaped gasket; The horizontal support pipe is hoisted to the interior of the running trolley through the lifting lug, and the waist-shaped pad is connected and fixed to the positioning base plate with M20 bolts; The dimensions of the opening direction of the two ends of the horizontal support pipe are adjusted according to the opening of the upper structure by using the adjustment pads with different thicknesses.

6. The method for preparing a running trolley for a semi-circular arc beam quay crane according to claim 2, characterized in that: A mobile boring machine is used to process four groups of wheel holes on the corresponding module components at one time.

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