Tooling for changing piers and spraying method for transition sections

Abstract

This application relates to the field of transition section painting technology, disclosing a pier replacement fixture and a transition section spraying method. The pier replacement fixture includes support components and tie rods. The support components are arranged in pairs, with the two pairs of support components spaced apart laterally. Each support component includes a support surface at the top, which is arc-shaped and used to contact the outer wall of the transition section. The tie rods are laterally connected between the two pairs of support components to lock the lateral spacing between them. This application allows for flexible adjustment of the lateral position and spacing of the two support components, enabling the support components to accurately align with the parts of the transition section to be supported. The support surface better conforms to the actual contour of the outer wall of the transition section, providing a stable support effect. Therefore, the pier replacement fixture of this application can improve the accuracy of alignment during the pier replacement process, and enhance the stability and safety of the pier replacement process.

Description

Technical Field

[0001] This application relates to the field of transition section coating technology, specifically to the tooling for changing piers and the method for spraying transition sections. Background Technology

[0002] The transition section (TP) is a key component in the foundation structure of offshore wind turbines. It is located between the top of the monopile and the bottom of the wind turbine tower, and plays a crucial role in connecting and transitioning between the two.

[0003] The main structure of the transition section is a large-diameter variable cross-section cylinder. Due to the large size of the transition section, existing sandblasting and painting workshops usually cannot meet the needs of vertical sandblasting and spraying operations on the transition section. They can only adopt a process of first horizontal sandblasting and painting, and then turning it over and standing it up. In the horizontal sandblasting and painting, the pressure-bearing contact area between the transition section cylinder and the transport tool is blocked by the transport tool and cannot be sandblasted and painted. It is necessary to change the support operation after the first round of sandblasting and painting to change the support area of ​​the transition section, expose the original pressure-bearing contact area, and perform a second sandblasting and painting.

[0004] However, the relevant technology has the problem of inaccurate alignment of the pier replacement tooling and the transition section during the pier replacement process. On the one hand, it may cause uneven stress on the transition section, resulting in deformation and damage to the transition section. On the other hand, it may generate excessive overturning moment, resulting in insufficient stability of the transition section and even overturning and other safety accidents. Summary of the Invention

[0005] This application provides a tooling for replacing piers and a method for spraying the transition section to solve the problem of inaccurate alignment during the replacement process.

[0006] In a first aspect, this application provides a pier-changing fixture, including support components and tie rods. The support components are arranged in pairs, with the two support components in a pair spaced apart laterally. Each support component includes a support surface at the top, which is arc-shaped and used to contact the outer wall of the transition section. The tie rods are laterally connected between the two support components in a pair to lock the lateral spacing between the support components.

[0007] According to the pier replacement fixture provided in this application, the transition section can be temporarily supported during the pier replacement process. By using two paired support components, the lateral position and spacing of the two support components can be flexibly adjusted, so that the support components are accurately aligned with the part of the transition section to be supported. The support surface better conforms to the actual contour of the outer wall of the transition section, achieving a stable support effect. After the position of the support components is determined, the relative position of the support components can be locked by tie rods, thereby preventing the support components from shifting laterally under force and further improving the stability of the support components. Therefore, the pier replacement fixture of this application can improve the accuracy of alignment during the pier replacement process and improve the stability and safety of the pier replacement process.

[0008] In one alternative embodiment, the support assembly includes multiple layers of stacked wooden blocks in the height direction, the wooden blocks including a contact block at the top layer and a flat block below the contact block, the contact block including a support surface, and the number of flat blocks being at least one, for adjusting the height of the support assembly.

[0009] In one optional embodiment, the pier-changing fixture further includes connecting bolts and connecting nuts. The connecting bolts are longitudinally inserted through the contact pad and the tie rod, and are fixed to the contact pad by the connecting nuts. The longitudinal direction is perpendicular to the transverse direction.

[0010] In one alternative embodiment, the radius of curvature of the support surface is greater than the outer wall radius of the transition section.

[0011] Secondly, this application provides a transition section spraying method using the pier-changing fixture provided in this application, comprising: placing the transport fixture on a transport vehicle, and horizontally placing the transition section on the transport fixture; the transport vehicle moving the transport fixture to the spraying station and leaving the spraying station; performing a first spraying operation; the transport vehicle returning to the spraying station; placing the pier-changing fixture on the transport vehicle; the transport vehicle lifting the transition section, the transport vehicle translating a set distance along the axial direction of the transition section, and the transport vehicle placing the transition section back into the transport fixture; and performing a second spraying operation.

[0012] The transition section spraying method provided in this application uses the pier replacement tooling provided in this application, and therefore has the beneficial effects brought by the pier replacement tooling, which will not be elaborated here.

[0013] In one optional embodiment, the pier-changing fixture is placed on the transport vehicle, comprising: placing the support assembly on the transport vehicle; connecting the tie rod between two of the support assemblies and enabling the tie rod to move laterally relative to the support assembly within a set range; the transport vehicle jacking the transition section comprises: adjusting the lateral position of the support assembly during the jacking process; and fixing the lateral position of the support assembly after the load of the pier-changing fixture reaches a set threshold; wherein the set threshold is less than the weight of the transition section.

[0014] In one alternative embodiment, the support assembly and the tie rod are connected by longitudinally extending connecting bolts, which are clearance-fitted with the support assembly and / or the tie rod. The connecting bolts are locked by connecting nuts to fix the lateral position of the support assembly.

[0015] In one optional embodiment, the process of the transport vehicle lifting the transition section further includes: lifting the pier-changing fixture until at least one of the support components contacts the transition section; adjusting the lateral position of the support components so that the initial contact points between each support component and the transition section are located in the middle of the support surface; continuing to lift the pier-changing fixture until the load-bearing capacity of the pier-changing fixture reaches the set threshold; fixing the lateral position of the support components; and continuing to lift the pier-changing fixture until the transition section is higher than the transport fixture by a set height.

[0016] In one optional embodiment, the pier-changing fixture is positioned between the transport vehicle and the transport vehicle lifting the transition section, and a first buffer protective layer is provided on top of the pier-changing fixture; the transition section is lifted by the transport vehicle and the transition section is returned to the transport fixture by the transport vehicle, and a second buffer protective layer is provided on top of the transport fixture.

[0017] In one alternative embodiment, before the transport vehicle moves the transport fixture to the spraying station, a shim block is pre-placed at the spraying station to support and elevate the support legs of the transport fixture. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the main structure of the pier replacement tool according to an embodiment of this application;

[0020] Figure 2 This is a side view of the pier-changing tooling according to an embodiment of this application;

[0021] Figure 3 This is a schematic diagram illustrating the principle of the transition section spraying method according to an embodiment of this application, showing the state of the transition section when it is supported by a transport fixture;

[0022] Figure 4 This is a schematic diagram illustrating the principle of the transition section spraying method according to an embodiment of this application, showing the state of the transition section when it is supported by the pier changing tool;

[0023] Figure 5 for Figure 3 A side view schematic diagram showing the axial support position of the transport tooling;

[0024] Figure 6 for Figure 4 A side view schematic diagram showing the axial support position of the pier replacement tool.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Transport fixtures; 2. Elevating blocks; 3. Transport vehicle; 4. Support components; 401. Contact pads; 402. Flat pads; 8. Tie rods; 9. Connecting bolts; 10. Transition sections; 11. Connecting nuts. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a," "an," and "comprising" as used herein may also mean including the plural forms. The terms "comprising," "including," and "having" are inclusive and therefore indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0029] Although terms such as "first," "second," etc., may be used in this document to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Furthermore, in the description of this application, unless otherwise expressly specified and limited, the terms "set up" and "connected" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a direct connection or an indirect connection via an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] The core structure of the transition section is a large-diameter variable cross-section cylinder. The top flange of the cylinder is connected to the flange at the bottom of the wind turbine tower. The middle flange of the cylinder is firmly connected and fixed to the monopile foundation that has been driven into the seabed. The sea-binding flange at the bottom of the cylinder is used for binding and fixing the transition section during marine transportation.

[0031] The transition section has a large external dimension. For example, the transition section used in some offshore wind turbines can reach φ8m*φ8.5m*27.6m in external dimension and weigh about 620 tons. Therefore, the existing sandblasting and painting workshops usually cannot meet the space requirements for vertical sandblasting and spraying operations of the transition section.

[0032] In related technologies, the process generally involves first horizontal sandblasting and painting, and then turning the cylinder over and standing it upright. Since the pressure-bearing and bonding surfaces of the transition section cylinder and the transport equipment cannot be sandblasted or sprayed, after the first spraying operation, a pier replacement operation must be carried out to expose the pressure-bearing and bonding surfaces for a second spraying operation.

[0033] During the pier replacement operation, the pier replacement tooling gradually lifts the transition section. Due to a series of error factors (such as the dimensional error of the outer contour of the cylinder, the dimensional error of the pier replacement tooling, and the alignment error), the pier replacement tooling and the transition section are prone to inaccurate alignment during the lifting process. This results in uneven stress and deviation from the center line. On the one hand, it may cause excessive local stress on the transition section and damage. On the other hand, it may generate excessive overturning moment, resulting in insufficient stability of the transition section and even overturning and other safety accidents.

[0034] The following is combined with Figures 1 to 6 This describes an embodiment of the present application.

[0035] Reference Figure 1 and Figure 2This application provides a pier replacement fixture, including a support component 4 and a tie rod 8. The support components 4 are arranged in pairs, and the two support components 4 in the pair are spaced apart in the lateral direction. The support component 4 includes a support surface at the top, which is arc-shaped and is used to contact the outer wall of the transition section 10. The tie rod 8 is laterally connected between the two support components 4 and is used to lock the spacing of the support components 4 in the lateral direction.

[0036] According to the pier replacement fixture provided in this application, the transition section 10 can be temporarily supported during the pier replacement process. Specifically, during the pier replacement operation, the two support components 4 are located on both sides of the centerline of the transition section 10, with the lateral direction perpendicular to the axis of the transition section 10. The pier replacement fixture first lifts the transition section 10, causing it to detach from the original transport fixture 1. Then, the pier replacement fixture moves the transition section 10 a certain distance along the axis, and then lowers it to put the transition section 10 back into the transport fixture 1. After the pier replacement operation, the pressure-bearing contact surface between the transition section 10 and the transport fixture 1 changes, making it suitable for spraying operations (sandblasting, painting, etc.) on the original pressure-bearing contact surface.

[0037] By using two pairs of support components 4, the lateral position and spacing of the two support components 4 can be flexibly adjusted, so that the support components 4 are accurately aligned with the part to be supported in the transition section 10, and the support surface better fits the actual contour of the outer wall of the transition section 10, achieving a stable support effect, which can avoid uneven force and also avoid force deviation.

[0038] After the position of the support component 4 is determined, the relative position of the support component 4 can be locked by the tie rod 8, thereby preventing the support component 4 from shifting laterally under the force and further improving the stability of the support component 4.

[0039] Therefore, the pier replacement tooling of this application can improve the accuracy of alignment during the pier replacement process, and improve the stability and safety of the pier replacement process.

[0040] Optionally, in some embodiments, the support assembly 4 includes multiple layers of stacked wooden blocks in the height direction. The wooden blocks include a contact block 401 at the top and a flat block 402 below the contact block 401. The contact block 401 includes a support surface, and the number of flat blocks 402 is at least one, for adjusting the height of the support assembly 4.

[0041] The support component 4 is made of wood, thus possessing a certain compressive deformation capacity. During the jacking and pressure-bearing process, the wood pads can deform, allowing their shape to better conform to the outer contour of the transition section 10, further improving the uniformity of force distribution. The wood pads are divided into contact pads 401 and flat pads 402, enabling the support component 4 to be flexibly combined. Appropriate specifications of contact pads 401 can be selected based on the outer contour of the transition section 10, and an appropriate number of flat pads 402 can be selected based on the required jacking distance, thereby flexibly adapting to different usage scenarios. For example, referring to… Figure 1 , Figure 2 In the embodiments of this application, the support component 4 consists of a contact pad 401 and three flat pads 402.

[0042] Furthermore, since the support component 4 is composed of multiple wooden blocks, the weight of each individual block is reduced, facilitating the handling, assembly, and adjustment of the support component 4. In some embodiments, the weight of the wooden blocks does not exceed 75 kg to facilitate stacking by construction personnel. Optionally, by selecting suitable wood materials, the wooden blocks can obtain appropriate compressive deformation capacity and density (weight). For example, red ironwood can be used for the wooden blocks, which has a certain amount of compressive deformation capacity and sufficient compressive strength to ensure that all support surfaces are subjected to uniform force and that the cylinder does not deform.

[0043] Optionally, in some embodiments, the radius of curvature of the support surface is greater than the outer wall radius of the transition section 10, thereby allowing for deformation allowance. After the transition section 10 presses down on the contact pad 401, the pressure causes the support surface to deform and shrink, reducing the radius of curvature, thereby fitting into the outer wall radius of the transition section 10 and further improving the support effect on the transition section 10.

[0044] Optionally, in some embodiments, reference is made to Figure 1 , Figure 2 The tooling for changing blocks also includes connecting bolts 9 and connecting nuts 11. The connecting bolts 9 are longitudinally inserted into the contact pad 401 and the tie rod 8, and are fixed to the contact pad 401 by the connecting nuts 11. The longitudinal direction is perpendicular to the transverse direction.

[0045] By connecting the tie rod 8 to the contact pad 401, the spacing of the contact pads 401 can be kept stable, thereby stably supporting the transition section 10. The tie rod 8 is installed by connecting bolts 9, and the connection bolts 9 and the contact pads 401 are clearance fit. Therefore, the tie rod 8 still has a certain degree of freedom of movement after connection. It can adjust the lateral position and spacing of the support component 4 within a certain range without severing the connection between the tie rod 8 and the support component 4, so as to better meet the process requirements during the pier replacement operation.

[0046] After the lateral position of the support component 4 is determined, the connecting bolts 9 are locked from both ends by connecting nuts 11, thereby locking the relative positional relationship between the tie rod 8 and the support component 4, stably supporting the transition section 10, and preventing displacement when under force.

[0047] Optionally, in some embodiments, reference is made to Figure 2 The number of contact pads 401 is multiple ( Figure 2 In practice, there are two contact pads 401 arranged longitudinally, with the end of the pull rod 8 sandwiched between adjacent contact pads 401. Thus, when the connecting bolt 9 is tightened, the contact pads 401 clamp the pull rod 8, locking it in place more stably.

[0048] Optionally, in some embodiments, the pull rod 8 includes a bent section inclined laterally, with both ends of the pull rod 8 connected to the middle of the pull rod 8 via the bent section. The bent section is adapted to play a avoidance role, keeping the middle of the pull rod 8 away from the transition section 10 and avoiding interference with the transition section 10.

[0049] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6 This application also provides a transition section spraying method, which is used to perform horizontal spraying operations such as sandblasting and painting on the transition section 10, and uses the pier replacement tooling provided in this application.

[0050] In some embodiments provided in this application, the transition section spraying method includes the following steps:

[0051] Step S110: The transport fixture 1 is placed on the transport vehicle 3, and the transition section 10 is placed horizontally on the transport fixture 1.

[0052] It is understandable that the transition section 10 has a large external dimension, so it is generally transported horizontally and supported by the transport fixture 1. The transport fixture 1 contacts the transition section 10 through the pressure-bearing bonding surface, thereby dispersing the force and preventing the transition section 10 from deforming under stress.

[0053] Step S120: Transport vehicle 3 moves transport fixture 1 to the spraying station and leaves the spraying station.

[0054] Step S130: Perform the first spraying operation.

[0055] Specifically, the spraying operation can be sandblasting, painting, or other surface treatment operations involving the cylinder of the transition section 10. The spraying station is generally located in a dedicated spraying workshop to prevent pollutants generated during spraying from spilling out and causing environmental pollution. After the transport vehicle 3 arrives at the spraying station, the platform is lowered, allowing the transport fixture 1 to be placed on the ground, thereby transferring the transition section 10 to the spraying station. After this, the transport vehicle 3 leaves the spraying workshop to avoid the spraying process affecting the transport vehicle 3.

[0056] Step S140: Transport vehicle 3 returns to the painting station.

[0057] Step S150: Place the pier changing tool on the transport vehicle 3.

[0058] Step S160: The transport vehicle 3 lifts the transition section 10, the transport vehicle 3 moves a set distance along the axis of the transition section 10, and the transport vehicle 3 puts the transition section 10 back into the transport fixture 1.

[0059] Step S170: Perform the second spraying operation.

[0060] According to the transition section spraying method of this application, by using the pier replacement tool to carry out the pier replacement operation of the transition section 10, the alignment effect between the pier replacement tool and the transition section 10 during the operation can be improved, avoiding uneven stress, overturning and other situations, and improving the stability and safety of the pier replacement process.

[0061] Optionally, in some embodiments, step S150 specifically includes: placing a support assembly 4 on the transport vehicle 3; connecting a tie rod 8 between two support assemblies 4, and enabling the tie rod 8 to move laterally relative to the support assembly 4 within a set range.

[0062] It is understandable that the support surface of the support component 4 is processed according to the theoretical outer contour shape of the transition section 10, so there is a certain error between it and the actual outer contour shape of the transition section 10. There is also a certain error in the process of placing the support component 4 on the transport vehicle 3. By keeping a certain degree of lateral movement freedom between the tie rod 8 and the support component 4, a margin can be left for subsequent adjustment of the lateral position and spacing of the support component 4, so that the support component 4 can better support the transition section 10.

[0063] Based on this, step S160 specifically includes: adjusting the lateral position of the support component 4 during the jacking process; fixing the lateral position of the support component 4 after the load of the pier changing tool reaches the set threshold; wherein the set threshold is less than the weight of the transition section 10.

[0064] In other words, when the weight of the transition section 10 is mainly borne by the transport fixture 1, the support component 4 is not subjected to much force and is allowed to move laterally to a certain extent. At this time, on the one hand, the operator can actively make minor adjustments to the lateral position of the support component 4 by observing the support situation on site. On the other hand, under the action of the lateral component force generated by the pressure of the transition section 10, the support component 4 will also passively undergo lateral displacement and compression deformation to adapt to the outer contour of the transition section 10.

[0065] After the weight of the transition section 10 is mostly borne by the pier changing tool, the support component 4 is in full contact with the transition section 10. The relative position of the two support components 4 has been adjusted to a suitable state. Thus, the lateral position of the support component 4 can be fixed by locking the tie rod 8 to ensure that the support component 4 will not shift outward during the lifting of the transition section 10.

[0066] Specifically, in Figure 4 , Figure 6 In the illustrated embodiment, in conjunction with reference to Figure 1 , Figure 2 The support assembly 4 and the tie rod 8 are connected by connecting bolts 9 that pass through longitudinally. The connecting bolts 9 are clearance-fitted with the support assembly 4 and / or the tie rod 8. The connecting bolts 9 are locked by connecting nuts 11 to fix the lateral position of the support assembly 4.

[0067] In step S150 and the early part of step S160, the connecting nut 11 is not fully tightened to the support component 4 (contact pad 401). At this time, the connecting bolt 9 mainly serves to constrain the connection between the tie rod 8 and the support component 4, ensuring that the tie rod 8 can reliably hold the support component 4, and preventing the support component 4 from shifting position or falling apart.

[0068] In the middle and later stages of step S160, most of the weight of the transition section 10 is borne by the pier changing tool. At this time, the connecting nut 11 is further tightened, the contact pad 401 presses the pull rod 8, and the support component 4 is locked laterally.

[0069] Optionally, the threshold can be set to any value between 35% and 55% of the weight of the transition segment 10, such as 35%, 42%, 50%, 55%, etc.

[0070] Optionally, in some embodiments, step S160 specifically includes: lifting the pier-changing fixture until at least one support component 4 contacts the transition section 10; adjusting the lateral position of the support components so that the initial contact points between each support component 4 and the transition section 10 are located in the middle of the support surface; continuing to lift the pier-changing fixture until the load-bearing capacity of the pier-changing fixture reaches a set threshold; fixing the lateral position of the support component 4; and continuing to lift the pier-changing fixture until the transition section 10 is higher than a set height relative to the transport fixture 1.

[0071] Understandably, as the support component 4 is raised, the contact surface between the support component 4 and the transition section 10 gradually increases, and the contact surface basically expands from the initial contact point to both sides. When at least one support component 4 is in contact with the transition section 10, the pier changing tool is in a state of just abutting the transition section 10. Each support component 4 and the transition section 10 is close to or in contact with each other, which is suitable for visually predicting and judging the initial contact point between each support component 4 and the transition section 10. Furthermore, the support component 4 is subjected to less pressure from the transition section 10, which is suitable for laterally adjusting the position of the support component 4. This allows the contact surface between each subsequent support component 4 and the transition section 10 to expand from the middle to both ends, improving the stability and reliability of the support.

[0072] Specifically, the support surface of the support component 4 can be divided into three parts along the horizontal direction: the upper part, the middle part, and the bottom part (for example, by dividing it equally according to the horizontal dimension of the support surface or by dividing it equally according to the arc angle of the support surface), thereby obtaining the range of the middle part. Alternatively, other rules can be used to divide the range of the middle part, and this application does not limit this.

[0073] Optionally, in some embodiments, when the pier-changing fixture is disposed between the transport vehicle 3 and the jacking transition section 10 of the transport vehicle 3, a first buffer protective layer is provided on the top of the pier-changing fixture; when the transport vehicle 3 jacks the transition section 10 and the transport vehicle 3 puts the transition section 10 back into the transport fixture 1, a second buffer protective layer is provided on the top of the transport fixture 1.

[0074] The first and second buffer protective layers are used to protect the sprayed surface and prevent scratches that could damage the surface quality of the transition section. For example, in some embodiments, a composite first and second buffer protective layer based on a cotton quilt and a plastic film can be used. The cotton quilt serves as the base to provide cushioning, and the plastic film is laid on top of the quilt, contacting the surface of the transition section 10 to provide protection.

[0075] In other embodiments not shown, the first and second buffer layers may be constructed in other ways, and this application does not limit this.

[0076] Optionally, in some embodiments, reference is made to Figure 3 , Figure 5 Before the transport vehicle 3 moves the transport fixture 1 to the spraying station, it also includes placing a shim block 2 in advance at the spraying station. The shim block 2 is used to support and elevate the legs of the transport fixture 1.

[0077] On the one hand, the raised block 2 can increase the bearing area of ​​the ground at the spraying station and reduce the pressure. On the other hand, the raised block 2 can raise the height of the transition section 10, thereby reserving more operating space below the transition section 10, which is convenient for the subsequent assembly and adjustment of the pier replacement tooling.

[0078] In other embodiments provided in this application, the transition section spraying method is specifically used for the painting operation of the transition section 10 after the sandblasting operation, and includes the following steps:

[0079] Step S201: Preliminary preparations.

[0080] Based on the specific model and specifications of the transition section 10, purchase or design and manufacture transportation fixtures 1, shims 2, and pier replacement fixtures that meet the load-bearing requirements. The finishing accuracy deviation of the arc of the support surface of the contact pad 401 should be less than 8mm, and the arc radius should be slightly larger than the cylinder radius of the transition section 10, leaving a deformation allowance to ensure that the transition section 10 and the contact pad 401 can fit tightly under the action of extrusion deformation, ensuring uniform force distribution.

[0081] Prepare two transport cars 3 for transporting goods and replacing piers in the transition section 10.

[0082] Draw a longitudinal baseline on the center of the transport vehicle 3 to pre-determine the theoretical placement position of the subsequent support component 4, with a line marking error of no more than 2mm.

[0083] Lofting and marking baselines are carried out on transition section 10, and the support positions of support component 4 and transport tooling 1 are drawn in advance.

[0084] Draw inspection lines on the support assembly 4 that correspond to the baselines on the transport vehicle 3 and the transition section 10. Draw inspection lines on the transport fixture 1 that correspond to the baselines on the transition section 10.

[0085] The transport equipment 1 is loaded onto two parallel transport cars 3.

[0086] The shim block 2 is placed in advance at the painting station in the painting workshop (which is also the shim changing station), and the arrangement of the shim block 2 corresponds to the support leg of the transport fixture 1.

[0087] Step S202: First painting operation.

[0088] After the transition section 10 is sandblasted in the sandblasting workshop, it is transferred to the painting station in the painting workshop by the transport vehicle 3. The transport vehicle 3 lowers the platform to allow the transport fixture 1 to be placed. When it is placed, the outriggers of the transport fixture 1 are placed on the support block 2.

[0089] After the transport vehicle 3 is lowered and unloaded, it leaves the painting workshop so that the transition section 10 can be painted at the painting station according to the design requirements. At this time, the arc-shaped contact surface between the transition section 10 and the transport tool 1 cannot be painted.

[0090] Step S203: Prepare to replace the pier.

[0091] Transport vehicle 3 re-enters the painting workshop and moves to the position where it docks with transport fixture 1 (the center planes of the two transport vehicles 3 are required to coincide with the axis of the transition section 10, with a deviation of no more than 20mm, and the platform of transport vehicle 3 is lowered by a minimum of 1150mm to increase the height distance between transport vehicle 3 and transport fixture 1, ensuring the installation space for subsequent replacement fixtures and the lifting space for transport vehicle 3).

[0092] Step S204: Arrange and install the pier replacement tooling.

[0093] Two pairs of support components 4 are installed on each of the two transport vehicles 3. When placing the support components 4, it is necessary to ensure that the placement accuracy deviation between the baseline and the inspection line is no more than 5mm, so that each support component 4 is aligned with the center of the vehicle board of the transport vehicle 3, so as to prevent the transport vehicle 3 from bearing additional overturning moment.

[0094] Before installation, a buffer layer (such as a cotton quilt or a 10mm thick soft rubber sheet) is laid on the support surface of the contact pad 401. Then, a plastic film is wrapped on the buffer layer. The contact pad 401 is first placed in the outer position and then pushed inward laterally. In order to facilitate the contact pad 401 to be pushed from the outside to the required position laterally, and to avoid the contact pad 401 scratching and damaging the surface of the transition section 10 after painting, the height of the support component 4 should leave a gap of at least 35mm between the support component 4 and the outer wall of the transition section 10 after the support component 4 is installed.

[0095] After the support assembly 4 is arranged, the support assembly 4 is connected laterally into a whole using the tie rod 8 to prevent the support assembly 4 from detaching due to compression and causing a safety accident. The tie rod 8 is connected to the contact pad 401 using the connecting bolt 9, but the connecting nut 11 is not tightened at first.

[0096] Install all 6 support components 4 using the method described above (refer to...). Figure 6 This completes the layout and installation of the pier replacement tooling.

[0097] Step S205: Pier replacement operation.

[0098] Operate the transport vehicle 3 and slowly lift it. When at least one contact pad 401 first contacts the outer wall of the cylinder of the transition section 10, stop lifting. Check and adjust the contact condition between the contact pad 401 and the transition section 10 one by one. By observing the contact fit, adjust the lateral position / spacing of the two support components 4 appropriately to make the contact pad 401 fit better with the arc surface of the cylinder of the transition section 10, so as to adapt to the manufacturing errors of different transition sections 10 and make the force as uniform as possible and close to the calculation results.

[0099] Then the transport vehicle 3 continues to lift, and the support components 4 begin to gradually bear the force. Because the pad wood has a certain compressibility, the different support components 4 balance each other through compression deformation, so that the force on each support component 4 is uniform, so as to prevent the outer wall of the cylinder from deforming.

[0100] After the load on the pier changing tool reaches more than 50% of the weight of the transition section 10, tighten the connecting nut 11 to lock and fix the two ends of the tie rod 8 and the support assembly 4.

[0101] The transport vehicle 3 continues to rise until the platform is 1280mm above the ground. At this point, the platform is 91mm above the lower surface of the lifting part of the transport fixture 1. The transition section 10 separates from the transport fixture 1, and the theoretical distance between the transition section 10 and the transport fixture 1 reaches 108mm.

[0102] After setting a set time (e.g., 3 minutes) to confirm that the load-bearing capacity of the pier replacement tool is normal, the transport vehicle 3 is moved forward 1.1 meters along the axis of the transition section 10. At this time, the outer wall of the cylinder that was originally covered is exposed and ready for painting.

[0103] Lay a buffer layer on the support position of transport fixture 1, then wrap it with plastic film. Operate transport vehicle 3 to lower it, so that transition section 10 falls back onto transport fixture 1. Transport fixture 1 resumes bearing the load. Check the fit between the arc surface of transport fixture 1 and transition section 10 one by one. After confirming that there are no errors, continue to operate transport vehicle 3 to lower it. Then transport vehicle 3 is withdrawn from the painting workshop, and the replacement operation is completed.

[0104] Step S206: Second painting operation.

[0105] At the painting station, the unpainted parts of transition section 10 are painted according to the design requirements.

[0106] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A tooling for changing support blocks, characterized in that, include: The support components are arranged in pairs, with the two support components in a pair spaced apart in the lateral direction. Each support component includes a support surface located at the top, which is arc-shaped and used to contact the outer wall of the transition section. A tie rod, laterally connected between two pairs of said support components, is used to lock the lateral spacing of said support components.

2. The pier-changing tooling according to claim 1, characterized in that, The support assembly includes multiple layers of wooden blocks stacked in the height direction. The wooden blocks include a contact block at the top layer and a flat block below the contact block. The contact block is located on the support surface. The number of flat blocks is at least one, used to adjust the height of the support assembly.

3. The pier-changing tooling according to claim 2, characterized in that, The pier-changing tooling also includes connecting bolts and connecting nuts. The connecting bolts are longitudinally inserted through the contact pad and the tie rod, and are fixed to the contact pad by the connecting nuts. The longitudinal direction is perpendicular to the transverse direction.

4. The pier-changing tooling according to claim 2, characterized in that, The radius of curvature of the support surface is greater than the outer wall radius of the transition section.

5. A transition section spraying method, characterized in that, The transition section spraying method uses the pier replacement fixture according to any one of claims 1 to 4, including: The transport fixture is placed on the transport vehicle, and the transition section is placed horizontally on the transport fixture; The transport vehicle moves the transport fixture to the spraying station and then leaves the spraying station; Perform the first spraying operation; The transport vehicle returns to the painting station; The pier-changing tooling is placed on the transport vehicle; The transport vehicle lifts the transition section, the transport vehicle translates a set distance along the axis of the transition section, and the transport vehicle puts the transition section back into the transport fixture; Perform the second spraying operation.

6. The transition section spraying method according to claim 5, characterized in that, The pier-changing tooling is placed on the transport vehicle and includes: The support assembly is mounted on the transport vehicle; Connect the tie rod between the two support components and enable the tie rod to move laterally relative to the support components within a set range; The transport vehicle lifts the transition section, including: Adjust the lateral position of the support assembly during the lifting process; After the load of the pier replacement fixture reaches a set threshold, the lateral position of the support component is fixed. Wherein, the set threshold is less than the weight of the transition section.

7. The transition section spraying method according to claim 6, characterized in that, The support assembly and the tie rod are connected by longitudinally threaded connecting bolts. The connecting bolts are clearance-fitted with the support assembly and / or the tie rod. The connecting bolts are locked by connecting nuts to fix the lateral position of the support assembly.

8. The transition section spraying method according to claim 6, characterized in that, The transport vehicle lifting the transition section also includes: Lift the pier-changing tooling until at least one of the support components contacts the transition section; Adjust the lateral position of the support components so that the initial contact points between each support component and the transition section are located in the middle of the support surface; Continue to lift the pier replacement fixture until the load-bearing capacity of the pier replacement fixture reaches the set threshold. Fix the lateral position of the support component; Continue to lift the pier-changing fixture until the transition section is higher than the set height relative to the transport fixture.

9. The transition section spraying method according to claim 5, characterized in that, The pier-changing fixture is positioned between the transport vehicle and the transition section that the transport vehicle lifts, and a first buffer protective layer is also provided on the top of the pier-changing fixture. Between the lifting of the transition section by the transport vehicle and the lowering of the transition section back into the transport fixture, a second buffer protective layer is also provided on top of the transport fixture.

10. The transition section spraying method according to claim 5, characterized in that, Before the transport vehicle moves the transport fixture to the spraying station, the method further includes placing a shim block at the spraying station in advance. The shim block is used to support and elevate the support legs of the transport fixture.

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