Pulley block support structure with channel and preparation method of pulley block support structure

Abstract

The invention discloses a pulley block support structure with a channel. The pulley block support structure comprises a supporting thin plate and a supporting thick plate. The two supporting thin plates are of the same structure and are arranged on a front extending girder steel structure of the quay crane in parallel. The number of the supporting thick plates is two, and the supporting thick plates are the same in structure and connected with the corresponding supporting thin plates. A main shaft hole and a channel are formed in the supporting thick plate; one end of the channel is communicated with the main shaft hole, and the other end of the channel is communicated with the edge of the supporting thick plate to form an opening structure. The invention further discloses a preparation method of the pulley block support structure with the channel. The invention provides a reasonable pulley block support form capable of facilitating overall assembly and disassembly of a pulley block, and designs a corresponding steel structure preparation method.

Description

Technical Field

[0001] The invention relates to a manufacturing technology of a pitch winding system structure of a shore container crane, and more specifically to a pulley block bracket structure with a channel and a preparation method thereof. Background Art

[0002] In order to meet the needs of large ships entering the port, the forward extension beam of the shore container crane needs to have a pitching function. In the conventional beam pitching system, the pulley block maintenance process is complicated, and the pulley shaft withdrawal and shaft insertion operations need to be carried out at high altitude, which has a high risk factor. Figure 1 As shown, the pulley bracket 11 of the existing pulley block adopts a full-circle shaft hole at the pulley shaft 12, the pulley 13 and the pulley shaft 12 and other fixing parts need to be installed in the state of parts, and the hole and the shaft are tightly matched, and the shaft withdrawal and shaft threading operations are extremely difficult. The pulley block is located on the beam of the shore container crane, and its operating height is generally more than 50 meters, and the operating risk factor is relatively high. Summary of the invention

[0003] In view of the defects existing in the prior art, the purpose of the present invention is to provide a pulley block support structure with a channel and a preparation method thereof, to provide a reasonable pulley block support form that can facilitate the overall disassembly and assembly of the pulley block, and to design a corresponding steel structure preparation method.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A first aspect of the present invention provides a pulley block support structure with a channel, comprising a supporting thin plate and a supporting thick plate;

[0006] There are two supporting thin plates with the same structure, which are arranged in parallel on the steel structure of the front extension beam of the quay crane;

[0007] The supporting thick plates are provided with two pieces, which have the same structure and are connected to the corresponding supporting thin plates;

[0008] The support thick plate is provided with a main shaft hole and a channel;

[0009] One end of the channel is connected to the main shaft hole, and the other end is connected to the edge of the supporting thick plate to form an open structure.

[0010] Preferably, the channel is set as an uplink channel;

[0011] A turn is provided on one end of the upward channel connected to the main shaft hole;

[0012] The other end of the upward channel is connected with the upper edge of the supporting thick plate to form an open structure.

[0013] Preferably, the transition arc of the turn is adapted to the radius of the spindle hole;

[0014] The lateral length of the turn is 3 times the radius of the spindle hole.

[0015] Preferably, heavy plates are provided on both side surfaces of the supporting thick plate.

[0016] Preferably, the channel is set as a downlink channel;

[0017] A transition section with a slope is provided on one end of the descending channel communicating with the main shaft hole;

[0018] The other end of the descending channel is connected with the lower edge of the supporting thick plate to form an open structure.

[0019] Preferably, the length of the transition section is between 40 mm and 100 mm;

[0020] The slope of the upper slope of the transition section is 1:(4-8).

[0021] Preferably, the thickness of the supporting thin plate is between 14 mm and 35 mm;

[0022] The thickness of the supporting thick plate is 2 to 3 times the thickness of the supporting thin plate.

[0023] The second aspect of the present invention provides a method for preparing the pulley block support structure with a channel provided in the first aspect of the present invention, comprising the following steps:

[0024] S1, according to the design dimensions, the components of the pulley block support structure are cut by CNC cutting equipment. Except for the inner diameter of the spindle hole for installing the spindle of the pulley block, the position and other dimensions of the channel are directly cut according to the design dimensions;

[0025] S2, assembling the components of multiple sets of the pulley block support structure onto the forward extending beam steel structure of the quay crane, aligning the channels in each set of the pulley block support structure by means of a wire drawing method, and completing the welding and fixing of the support sheet to the forward extending beam steel structure of the quay crane;

[0026] S3, using a horizontal laser instrument to measure the final spatial position of each set of the channels, analyzing the manufacturing error of the steel structure of the forward extension beam of the quay crane, and taking the average center line of each set of the channels to determine the reference as the subsequent marking reference of the spindle hole machining center;

[0027] S4, for the processing of the steel structure of the forward extension beam of the quay crane, a mobile boring machine is used to perform boring processing on the main shaft hole according to the shaft hole processing center;

[0028] S5, after the spindle hole is processed, the steps remaining at the turning or transition section are polished with a handheld grinder to form a natural transition between the channel and the spindle hole, and then the channel is tested with a dummy shaft to ensure that the pulley block spindle can be installed smoothly later.

[0029] Preferably, the supporting thick plate is provided with the heavy plate, and a welding groove needs to be prepared at the channel position. When the heavy plate and the supporting thick plate are welded together, the welding groove at the channel position is also welded and sealed.

[0030] The present invention provides a pulley block support structure with a channel and a preparation method thereof, specifically the following points

[0031] Beneficial effects:

[0032] 1) The pulley block support structure of the present invention has a channel, the size of which is larger than the diameter of the main shaft of the pulley block, so that the pulley block can be disassembled and assembled as a whole from the channel;

[0033] 2) The pulley block support structure of the present invention adopts the form of butt joint between the supporting thin plate and the supporting thick plate to strengthen the stress position of the main shaft hole;

[0034] 3) The pulley block support structure of the present invention adopts a supporting thick plate with a heavy plate to strengthen the stress position of the main shaft hole, and designs a heavy gap weld sealing construction process at the channel;

[0035] 4) The pulley block support structure of the present invention adopts an upward channel with a turn, so that the pulley shaft has sufficient structural support in the force direction and has sufficient adaptability to the steel structure manufacturing error;

[0036] 5) The pulley block support structure of the present invention adopts a downward channel transition section with a slope, so that the downward channel and the shaft hole do not need to be completely centered, and it has sufficient adaptability to the manufacturing error of the steel structure;

[0037] 6) In the preparation method of the present invention, the channel is directly cut into place during the steel plate cutting stage, thus avoiding the problem that large steel structures cannot be milled as a whole;

[0038] 7) The preparation method of the present invention adopts a wire-drawing calibration method so that the channels of each support plate can be aligned when the pulley block bracket is assembled, thereby avoiding the problem that the pulley block cannot be installed due to channel misalignment;

[0039] 8) The preparation method of the present invention adopts a method for determining the final processing reference of the pulley bracket shaft hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a schematic diagram of an existing pulley assembly;

[0041] Figure 2It is a schematic diagram of the channel in the pulley block support structure of the present invention using an upward channel;

[0042] Figure 3 It is a schematic diagram of a channel in the pulley block support structure of the present invention adopting a downward channel;

[0043] Figure 4 Schematic diagram of the use state of the pulley block support structure of the present invention, (a) is the upward channel, (b) is the downward channel;

[0044] Figure 5 It is a schematic diagram of numerical control cutting of channel positions in the preparation method of the present invention;

[0045] Figure 6 It is a schematic diagram of the calibration of the bracket assembly wire in the preparation method of the present invention;

[0046] Figure 7 It is a schematic diagram of the residual steps after the spindle hole is processed in the preparation method of the present invention, (a) is the upward channel, and (b) is the downward channel. DETAILED DESCRIPTION

[0047] 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.

[0048] Combination Figure 2 and Figure 3 As shown, the present invention provides a pulley block support structure with a channel, which is provided in multiple sets and all are welded to the forward extending beam steel structure 100 of the quay crane, and each set includes a supporting thin plate 1 and a supporting thick plate 2.

[0049] Two supporting thin plates 1 are provided, which have the same structure and are connected in parallel to the forward extending beam steel structure 100 of the quay crane.

[0050] Two supporting thick plates 2 are provided, which have the same structure and are connected to the corresponding supporting thin plates 1 .

[0051] The supporting thick plate 2 is provided with a spindle hole 3 and a channel.

[0052] One end of the channel is connected to the main shaft hole 3, and the other end is connected to the edge of the supporting thick plate 2 to form an open structure.

[0053] Recombination Figure 1 As shown, the channel is set to uplink channel 4.

[0054] A turn 5 is arranged on one end of the upward passage 4 communicating with the main shaft hole 3 .

[0055] The other end of the upward channel 4 penetrates the upper edge of the supporting thick plate 2 to form an open structure.

[0056] The transition arc of the turn 5 is close to the radius of the main shaft hole 3, and the transverse length of the turn 5 is 3 times the radius of the main shaft hole 3, which can realize the assembly of the main shaft of the pulley block.

[0057] The upward channel 4 with the turn 5 can adapt to the manufacturing errors of the forward extending beam steel structure 100 of the quay crane in the up, down, left and right directions. When there is an error in the relative position between the finally processed main shaft hole 3 and the upward channel 4, it does not affect the function of the upward channel 4, and the pulley block can still be disassembled and assembled normally.

[0058] When the channel adopts the upward channel 4, heavy plates 6 are arranged on both side surfaces of the supporting thick plate 2.

[0059] Recombination Figure 3 As shown, the channel is set to downlink channel 7.

[0060] A transition section 8 with a slope is arranged on one end of the descending channel 7 communicating with the main shaft hole 3 .

[0061] The other end of the descending channel 7 penetrates the lower edge of the supporting thick plate 2 to form an open structure.

[0062] The transition section 8 with a slope gradually expands the width of the channel from the diameter of the main shaft hole 3. The length of the transition section 8 is between 40 mm and 100 mm, and the slope of the slope on the transition section 8 is set to 1: (4-8).

[0063] In this embodiment, the length of the transition section 8 is set to 50 mm, 60 mm, 70 mm, 80 mm or 90 mm.

[0064] In this embodiment, the slope of the transition section 8 is set to 1:4, 1:5, 1:6 or 1:7.

[0065] A transition section 8 with a slope is provided in the down channel 7, so that the final processed main shaft hole 3 and the down channel 7 do not have to be completely centered, and the manufacturing error of the forward extension beam steel structure 100 of the quay crane is fully adaptable.

[0066] According to the tension of the wire rope, the support plate in the pulley block support structure of the present invention adopts different thicknesses and size specifications. The strength of the support thin plate 1 needs to meet the requirements of wire rope tension transmission; the support thick plate 2 with the main shaft hole 3 and the channel needs to increase the thickness to offset the weakening of the structural strength by the channel while meeting the requirements of wire rope tension transmission. If necessary, a heavy plate 6 is installed on the side of the support thick plate 2 to further strengthen the structural strength at the channel. At the same time, the thickening of the structure can increase the contact area between the main shaft of the pulley block and the main shaft hole 3 to meet the compressive stress limit of the support material.

[0067] The thickness of the supporting plate 1 is selected appropriately according to the stress of the pulley block, generally between 14 mm and 35 mm.

[0068] The thickness of the supporting thick plate 2 is selected appropriately according to the stress condition of the pulley block, and is generally 2 to 3 times the thickness of the supporting thin plate 1.

[0069] In this embodiment, the thickness of the supporting thin plate 1 is set to 15 mm, 20 mm, 25 mm or 30 mm.

[0070] Combination Figure 4 As shown, the supporting thin plate 1 and the supporting thick plate 2 are the main structures of the pulley block support structure 200 of the present invention, and are the main supporting structures of the pitch pulley block 300. The pulley block support structure 200 of the present invention is installed on the forward extension beam steel structure 100 of the quay crane, and the pitch pulley block 300 is pulled obliquely upward by the pitch system wire rope to achieve the overall pitch of the forward extension beam steel structure 100.

[0071] The present invention also provides a method for preparing the pulley block support structure of the present invention, comprising the following steps:

[0072] S1, according to the design size, the components of the pulley block support structure of the present invention are cut by CNC cutting equipment, except for the inner diameter of the spindle hole 3 for installing the spindle position of the pulley block, which retains the processing allowance (such as Figure 5 As shown), the position and other dimensions of the channel are directly cut according to the designed dimensions;

[0073] S2, assembling the components of multiple sets of the pulley block support structure of the present invention to the forward extension beam steel structure 100 of the quay crane, and aligning the channels in each set of the pulley block support structure of the present invention by means of a wire drawing method (such as Figure 6 As shown), the support sheet 1 is welded and fixed to the steel structure 100 of the front extension beam of the quay crane; by aligning two sets of pulleys with larger spans on the left and right at the same time, the subsequent pulley group is ensured to be smoothly installed, replacing the individual measurement and positioning of each support sheet 1, simplifying the operation process;

[0074] S3, use a horizontal laser to measure the final spatial position of each set of channels, analyze the manufacturing error of the steel structure 100 of the forward extension beam of the quay crane, and determine the benchmark by taking the average center line of each set of channels as the marking benchmark for the subsequent spindle hole 3 machining center;

[0075] S4, for the processing of the steel structure 100 of the forward extension beam of the quay crane, a mobile boring machine is used to bore the main shaft hole 3 according to the shaft hole processing center;

[0076] S5, the step remaining at the turning 5 or transition section 8 after the spindle hole 3 is processed (such as Figure 7 As shown), a handheld grinder is used for grinding to form a natural transition between the channel and the spindle hole 3, and then a dummy shaft is used to test the channel to ensure that the subsequent pulley block spindle can be installed smoothly.

[0077] In the above steps, if the supporting thick plate 2 is provided with a heavy plate 6, a welding groove needs to be prepared at the channel position, and when the heavy plate 6 and the supporting thick plate 2 are welded together, the welding groove at the channel position is also welded and sealed.

[0078] 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 pulley block support structure with a channel, characterized in that: Including supporting thin plates and supporting thick plates; There are two supporting thin plates with the same structure, which are arranged in parallel on the steel structure of the front extension beam of the quay crane; The supporting thick plates are provided with two pieces, which have the same structure and are connected to the corresponding supporting thin plates; The support thick plate is provided with a main shaft hole and a channel; One end of the channel is connected to the main shaft hole, and the other end is connected to the edge of the supporting thick plate to form an open structure.

2. The pulley support structure with a channel according to claim 1, characterized in that: The channel is set as an uplink channel; A turn is provided on one end of the upward channel connected to the main shaft hole; The other end of the upward channel is connected with the upper edge of the supporting thick plate to form an open structure.

3. The pulley support structure with a channel according to claim 2, characterized in that: The transition arc of the turn is adapted to the radius of the spindle hole; The lateral length of the turn is 3 times the radius of the spindle hole.

4. The pulley support structure with a channel according to claim 2, characterized in that: Heavy plates are arranged on both side surfaces of the supporting thick plate.

5. The pulley support structure with a channel according to claim 1, characterized in that: The channel is set as a downlink channel; A transition section with a slope is provided on one end of the descending channel communicating with the main shaft hole; The other end of the descending channel is connected with the lower edge of the supporting thick plate to form an open structure.

6. The pulley support structure with a channel according to claim 5, characterized in that: The length of the transition section is between 40 mm and 100 mm; The slope of the upper slope of the transition section is 1:(4-8).

7. The pulley support structure with a channel according to claim 1, characterized in that: The thickness of the supporting thin plate is between 14 mm and 35 mm; The thickness of the supporting thick plate is 2 to 3 times the thickness of the supporting thin plate.

8. A method for preparing a pulley block support structure with a channel as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1, according to the design dimensions, the components of the pulley block support structure are cut by CNC cutting equipment. Except for the inner diameter of the spindle hole for installing the spindle of the pulley block, the position and other dimensions of the channel are directly cut according to the design dimensions; S2, assembling the components of multiple sets of the pulley block support structure onto the forward extending beam steel structure of the quay crane, aligning the channels in each set of the pulley block support structure by means of a wire drawing method, and completing the welding and fixing of the support sheet to the forward extending beam steel structure of the quay crane; S3, using a horizontal laser instrument to measure the final spatial position of each set of the channels, analyzing the manufacturing error of the steel structure of the forward extension beam of the quay crane, and taking the average center line of each set of the channels to determine the reference as the subsequent marking reference of the spindle hole machining center; S4, for the processing of the steel structure of the forward extension beam of the quay crane, a mobile boring machine is used to perform boring processing on the main shaft hole according to the shaft hole processing center; S5, after the spindle hole is processed, the steps remaining at the turning or transition section are polished with a handheld grinder to form a natural transition between the channel and the spindle hole, and then the channel is tested with a dummy shaft to ensure that the pulley block spindle can be installed smoothly later.

9. The preparation method according to claim 8, characterized in that: The supporting thick plate is provided with the heavy plate, and a welding groove needs to be prepared at the channel position. When the heavy plate and the supporting thick plate are welded together, the welding groove at the channel position is also welded and sealed.

Images