Splicing steel plate leveling method

Abstract

The application discloses a spliced steel plate leveling method, and specifically comprises the following steps: determining a splicing sequence; arranging a plurality of joint leveling devices on a device foundation structure; adjusting the levelness of the top surface of a support plate through at least three leveling assemblies, and leveling the elevation of the top surface of the support plate in all joint leveling devices; arranging embedded leveling devices in a rectangular array on the device foundation structure; uniformly leveling the elevation of the top surface of all first leveling nuts according to the elevation of the top surface of the support plate; sequentially seating the spliced steel plates on the top surface of the first leveling nuts according to the splicing sequence, and overlapping the bottom surface of the spliced steel plates with the top surface of the support plate, and fixing the pressing nuts; checking the elevation of all bolt holes on the spliced steel plate and on both sides of the joint after seating one spliced steel plate; and seating the next spliced steel plate after the elevation meets the preset range. The spliced steel plate leveling method can improve the overall flatness of the spliced steel plate and the position accuracy of the mounting holes on both sides of the joint, and has high leveling efficiency.

Description

Technical Field

[0001] This invention relates to the field of engineering construction technology, and in particular to a method for leveling spliced ​​steel plates. Background Technology

[0002] Large precision equipment requires high flatness of the foundation's top surface. To provide good flatness accuracy, steel plates must be installed on the top surface of the foundation and leveled with high precision, controlling the positional accuracy of mounting holes to within 0.01mm to avoid affecting the installation and operation accuracy of the upper precision equipment. Current leveling methods for the steel plates on the foundation's top surface are only suitable for adjusting the flatness of individual steel plates, failing to address the overall flatness accuracy issue after steel plate splicing, as well as the positional accuracy of the equipment mounting holes on both sides of the splice. Furthermore, there is currently no technology to simultaneously adjust for the loss of flatness accuracy caused by transportation and hoisting during the steel plate splicing process. Therefore, it is necessary to improve existing technical solutions to address the overall flatness accuracy issue after splicing and the positional accuracy issue of mounting holes on both sides of the splice, while simultaneously improving leveling efficiency and reducing construction time and labor costs. Summary of the Invention

[0003] This invention discloses a method for leveling spliced ​​steel plates, which can improve the overall flatness of the spliced ​​steel plates and the positional accuracy of the equipment mounting holes on both sides of the splice, and has high leveling efficiency.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A method for leveling spliced ​​steel plates includes:

[0006] The splicing sequence is determined based on the parameters of the equipment foundation structure and the parameters of the splicing steel plates, including shape and size.

[0007] Multiple joint leveling devices are arranged on the equipment base structure, wherein the position of the joint leveling devices is determined based on the parameters of the splicing steel plates; the joint leveling device includes a support plate and at least three leveling components, the support plate is connected to the equipment base structure through the at least three leveling components, and three of the at least three leveling components are arranged in a triangular layout.

[0008] The levelness of the top surface of the support plate is adjusted by the at least three leveling components so that the elevation difference of multiple preset control points on the top surface of the support plate meets the preset range; and the elevation of the top surface of the support plate in all the joint leveling devices is leveled; the top surface of the support plate is the surface of the support plate facing away from the equipment foundation structure.

[0009] Pre-embedded leveling devices are arranged in a rectangular array on the equipment foundation structure, with a 1m interval between two adjacent pre-embedded leveling devices; each pre-embedded leveling device includes a pre-embedded bolt, a first leveling nut, and a clamping nut.

[0010] The elevation of the top surface of the first leveling nut in all the pre-embedded leveling devices is uniformly measured according to the elevation of the top surface of the support plate; the top surface of the first leveling nut in the pre-embedded leveling device is the surface of the first leveling nut in the pre-embedded leveling device that is away from the equipment foundation structure.

[0011] According to the splicing sequence, the spliced ​​steel plates are placed on the top surface of the first leveling nut, and the bottom surface of the spliced ​​steel plate overlaps the top surface of the support plate. The pre-embedded bolts pass through the first bolt holes of the spliced ​​steel plates, and the clamping nuts are fixed to the pre-embedded bolts to clamp the top surface of the spliced ​​steel plates.

[0012] After each spliced ​​steel plate is placed, the elevation of all the first bolt holes on the spliced ​​steel plate is checked, and the elevation of the first bolt holes on both sides of the splice joint is also checked; wherein the splice joint is formed by the spliced ​​steel plate and the previously placed spliced ​​steel plate; if the elevation difference between two first bolt holes exceeds the preset range, the pre-embedded leveling device corresponding to the spliced ​​steel plate is readjusted until the elevation difference of all the first bolt holes on the spliced ​​steel plate and the elevation difference of the first bolt holes on both sides of the splice joint meet the preset range before the next spliced ​​steel plate is placed;

[0013] After all the spliced ​​steel plates are in place and leveled, apply the same preload to all the clamping nuts.

[0014] The aforementioned method for leveling spliced ​​steel plates can solve the problems of flatness and positional accuracy of mounting holes on both sides of the steel plate joints. A leveling system is formed through a series of joint leveling devices and pre-embedded leveling devices, ensuring consistent flatness of the overall steel plate formed by different spliced ​​steel plates and guaranteeing the positional accuracy of the precision equipment mounting holes reserved on the steel plate. The joint leveling device provides a high-precision support plane for the spliced ​​steel plates, reducing warping at the joints and improving the horizontal accuracy of the spliced ​​steel plates at the joints. The pre-embedded leveling device provides a dense support surface composed of leveling nuts for each steel plate, while the tightening nuts provide a downward constraint force for each steel plate, reducing warping deformation caused by localized impacts during steel plate hoisting and placement, improving the flatness of each individual steel plate, and ensuring the positional accuracy of the equipment mounting holes on both sides of the joint. Specifically, the splicing sequence is first determined based on the parameters of the equipment foundation structure and the shape and size of the splicing steel plates. Then, multiple joint leveling devices are arranged on the equipment foundation structure according to the parameters of the splicing steel plates, and these devices are adjusted. Each joint leveling device includes a support plate and at least three leveling components. The support plate is connected to the equipment foundation structure through these components, and three of the components are arranged in a triangular layout. This arrangement ensures that the at least three leveling components define a plane. Adjusting these components further adjusts the levelness of the top surface of the support plate, ensuring that the elevation difference between multiple preset control points on the top surface of the support plate meets a preset range. The elevation of the top surface of the support plate in all joint leveling devices is then measured. When the splicing steel plates are placed on the top surface of the support plate, the flatness of the joints is improved. After the installation and adjustment of the joint leveling devices are completed, several more pre-embedded leveling devices are added to improve the local flatness of each splicing steel plate. First, multiple pre-embedded leveling devices are arranged in a rectangular array on the equipment foundation structure, with a 1-meter interval between adjacent devices. Then, these devices are adjusted. First, based on the elevation of the top surface of the support plate, the elevation of the top surface of the first leveling nut in each device is adjusted sequentially to ensure that the top surface of the support plate and the top surface of the first leveling nut are on the same horizontal plane. This ensures that the difference between the elevations of the support plate and the first leveling nut meets a preset range. When the spliced ​​steel plate is placed on the top surface of the support plate, the joint and the middle portion of the spliced ​​steel plate are on the same horizontal plane. Then, according to the splicing sequence, the spliced ​​steel plates are hoisted and placed onto the top surface of the first leveling nut in each device, with the joint overlapping the top surface of the support plate. After placement, the clamping nuts in the pre-embedded leveling devices are fixed in place. When installing the clamping nut, a prestressed wrench is required. By controlling the wrench value, a certain local downward constraint force is applied to the spliced ​​steel plate after it is placed, which further reduces the deformation caused by local minor impacts when the spliced ​​steel plate is hoisted and placed.After the clamping nuts are tightened, the elevation of all the first bolt holes on the spliced ​​steel plate needs to be checked. Simultaneously, the elevation of the first bolt holes on both sides of the splice joint needs to be checked. If the elevation difference between two first bolt holes exceeds the preset range, the height of the clamping nuts in the embedded leveling devices needs to be readjusted, or multiple embedded leveling devices need to be moved and the elevation of the top surface of the first leveling nuts in these devices needs to be readjusted. This ensures that the elevation difference of all the first bolt holes on the final spliced ​​steel plate, as well as the elevation difference of the first bolt holes on both sides of the splice joint, meets the preset range. Then, the next spliced ​​steel plate is placed on top, ensuring the flatness of the top surface of the spliced ​​steel plate. After all the spliced ​​steel plates are placed and leveled, the same preload is applied to all clamping nuts.

[0015] This application combines an independent seam leveling device with a pre-embedded leveling device to form a leveling system that takes into account both the planar accuracy at the seam and the planar accuracy of each point in the middle of a single steel plate, and can improve the adjustment efficiency for obtaining consistent accuracy of spliced ​​steel plates.

[0016] In some embodiments, the leveling assembly includes a leveling bolt and a second leveling nut, the leveling bolt being threadedly connected to the second leveling nut, and the portion of the leveling bolt protruding from the second leveling nut being inserted into the support plate, and the support plate abutting against the second leveling nut;

[0017] The levelness of the top surface of the support plate is adjusted by the at least three leveling components so that the elevation difference of multiple preset control points on the top surface of the support plate meets a preset range, including:

[0018] The levelness of the top surface of the support plate is adjusted by adjusting the position of the second leveling nut relative to the leveling bolt in the at least three leveling components.

[0019] In some embodiments, the levelness of the top surface of the support plate is adjusted by the at least three leveling components so that the elevation difference of multiple preset control points on the top surface of the support plate meets a preset range, and then the method further includes:

[0020] The second leveling nut and support plate in each of the joint leveling devices are welded together, and the leveling bolts that extend beyond the support plate are cut off and ground flat.

[0021] In some embodiments, the bottom surface of the splicing steel plate overlaps the top surface of the support plate, including:

[0022] The splicing steel plate is a rectangular plate, and the four corner points of the bottom surface of the splicing steel plate correspond to the top surface of the support plate.

[0023] In some embodiments, the support plate is a rectangular plate, and the plurality of preset control points include the four corner points and the geometric center point of the support plate.

[0024] In some embodiments, after all the spliced ​​steel plates are seated and leveled, the same preload is applied to all the clamping nuts, followed by:

[0025] Pre-embedded fine-tuning devices are arranged in a rectangular array on the equipment foundation structure, with a 1m interval between two adjacent pre-embedded fine-tuning devices, and are arranged alternately with the pre-embedded leveling devices; each pre-embedded fine-tuning device includes a fine-tuning bolt and a second cover plate, and the fine-tuning bolt passes through the second bolt hole of the splicing steel plate.

[0026] The elevation of each of the second bolt holes is measured one by one to obtain the elevation of each second bolt hole and the initial flatness of the spliced ​​steel plate; the elevations of all the second bolt holes are sorted from high to low to determine the fine adjustment sequence; the fine adjustment bolts in all the pre-embedded fine adjustment devices are adjusted according to the fine adjustment sequence to make the elevation difference of the second bolt holes and the flatness of the spliced ​​steel plate meet the preset range; and the second cover plate is then placed over the second bolt holes.

[0027] In some embodiments, the pre-embedded leveling device further includes a first cover plate;

[0028] The process of fitting the second cover plate onto the second bolt hole further includes:

[0029] Weld all the corresponding first leveling nuts, clamping nuts and pre-embedded bolts together; spot weld all the clamping nuts to the splicing steel plate and cover the first cover plate with the first bolt hole.

[0030] In some embodiments, the pitch of the fine-tuning bolt satisfies the following formula: P = 1 / n × d; where P represents the pitch, and P is 1 / 10 of the standard pitch, n represents the number of threads per inch or per millimeter, and d represents the diameter of the fine-tuning bolt.

[0031] In some embodiments, the thickness of the splicing steel plate is ≥100mm;

[0032] The surface roughness of the spliced ​​steel plate is ≤3.2μm;

[0033] The flatness positional tolerance of the spliced ​​steel plates is ≤0.5μm;

[0034] The straightness position tolerance of the spliced ​​steel plates is ≤3.05μm.

[0035] In some embodiments, before hoisting the spliced ​​steel plate to the top surface of the first leveling nut in the plurality of pre-embedded leveling devices, the method further includes:

[0036] Multiple square timbers are provided and arranged in an array, and a layer of spliced ​​steel plate is placed on the square timber array.

[0037] In some embodiments, a layer of spliced ​​steel plate is placed on the square timber array, and then the process further includes:

[0038] A frame is laid on the spliced ​​steel plate, and the spliced ​​steel plate is placed on the frame.

[0039] In some embodiments, the method for leveling the spliced ​​steel plate further includes: before hoisting the spliced ​​steel plate, setting the hoisting point in the direction of the short side of the spliced ​​steel plate, and the hoisting point being located at 1 / 4L from the corner point of the spliced ​​steel plate, where L represents the length of the short side of the spliced ​​steel plate. Attached Figure Description

[0040] Figure 1 A flowchart illustrating a method for leveling spliced ​​steel plates provided in an embodiment of this application;

[0041] Figure 2 This is a schematic diagram of the structure of a seam leveling device provided in an embodiment of this application;

[0042] Figure 3 This is a schematic diagram of the structure of a support plate provided in an embodiment of this application;

[0043] Figure 4 This is a schematic diagram of the structure of a pre-embedded leveling device provided in an embodiment of this application;

[0044] Figure 5 This is a schematic diagram of the structure of a first bolt hole provided in an embodiment of this application;

[0045] Figure 6 This is a schematic diagram of the structure of a splicing steel plate and a joint leveling device provided in an embodiment of this application;

[0046] Figures 7(a), 7(b), 7(c), and 7(d) are schematic diagrams of a splicing sequence of spliced ​​steel plates provided in an embodiment of this application;

[0047] Figure 8 This is a schematic diagram of the structure of a first cover plate provided in an embodiment of this application;

[0048] Figure 9 This is a schematic diagram of the structure of a pre-embedded bolt provided in an embodiment of this application;

[0049] Figure 10 This is a schematic diagram of the structure of a pre-embedded fine-tuning device provided in an embodiment of this application;

[0050] Figure 11 This is a schematic diagram of the structure of a second bolt hole provided in an embodiment of this application;

[0051] Figure 12This is a schematic diagram of the structure of a second cover plate provided in an embodiment of this application;

[0052] Figure 13 This is a schematic diagram of the structure of a fine-tuning bolt provided in an embodiment of this application;

[0053] Icons: 1. Equipment foundation structure; 2. Splicing steel plate; 11. Support plate; 111. Through hole; 12. Leveling component; 121. Leveling bolt; 122. Second leveling nut; 21. Embedded bolt; 22. First leveling nut; 23. Tightening nut; 24. First cover plate; 25. First bolt hole; 31. Fine adjustment bolt; 32. Second cover plate; 33. Second bolt hole; 34. Pad. Detailed Implementation

[0054] First, let's introduce the application scenario of this application. Large precision equipment requires high flatness of the top surface of the equipment foundation. To provide good flatness accuracy, a steel plate needs to be installed on the top surface of the equipment foundation and leveled with high precision. The positional accuracy of the mounting holes must be controlled within 0.01mm to avoid affecting the installation and operation accuracy of the upper precision equipment. Currently, the leveling method used for the steel plate on the top surface of the equipment foundation mainly involves adjusting the flatness of the entire steel plate using a set screw device located at the bottom of the steel plate. Its working principle is to adjust the elevation of the three set screw devices at the bottom of the steel plate, defining a plane from three points to achieve overall flatness adjustment of the steel plate. The above leveling method is only suitable for adjusting the flatness of a single steel plate. If applied to the leveling of multiple steel plates spliced ​​together, it cannot solve the flatness problem at the joint.

[0055] To address the potential loss of flatness accuracy in steel plates during transportation and hoisting, two methods can be employed for correction. One method involves placing iron plates along the bottom edge of the steel plate and using jacks to adjust any warping at the edges. However, once the steel plate is hoisted to the equipment foundation, correcting the flatness of the central section becomes difficult and ineffective. The other method involves making localized openings in the central section of the steel plate and then using leveling tools such as screws and pressure rings for correction. However, this method is only suitable for steel plates with localized upward warping; it is ineffective for areas with localized concavity. Furthermore, since each adjustment point needs to be operated individually, this method has low efficiency in flatness adjustment.

[0056] Based on the above application scenarios, this application provides a method for leveling spliced ​​steel plates, which solves the flatness problem at the joint of spliced ​​steel plates and the flatness problem of each spliced ​​steel plate itself, and has a high leveling efficiency.

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in the text is only a description of the relationship between related objects, indicating that there can be three relationships, for example, A and / or B can mean: A alone, A and B at the same time, and B alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0058] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0059] like Figure 1 As shown in the figure, this application provides a method for leveling spliced ​​steel plates, which specifically includes the following steps:

[0060] S101. Determine the splicing sequence; the splicing sequence is determined based on the parameters of the equipment foundation structure and the parameters of the splicing steel plates, including shape and size;

[0061] S102. Multiple joint leveling devices are arranged on the equipment foundation structure, wherein the position of the joint leveling devices is determined based on the parameters of the splicing steel plates; the joint leveling device includes a support plate and at least three leveling components, the support plate is connected to the equipment foundation structure through at least three leveling components, and three of the at least three leveling components are arranged in a triangular layout.

[0062] S103. Adjust the levelness of the top surface of the support plate by at least three leveling components so that the elevation difference of multiple preset control points on the top surface of the support plate meets the preset range; and level the elevation of the top surface of the support plate in all joint leveling devices; the top surface of the support plate is the surface of the support plate facing away from the equipment foundation structure.

[0063] S104. Pre-embedded leveling devices are arranged in a rectangular array on the equipment foundation structure, and the interval between two adjacent pre-embedded leveling devices is 1m; the pre-embedded leveling devices include pre-embedded bolts, first leveling nuts and clamping nuts.

[0064] S105. Based on the elevation of the top surface of the support plate, uniformly level the elevation of the top surface of the first leveling nut in all the pre-embedded leveling devices; the top surface of the first leveling nut in the pre-embedded leveling device is the surface of the first leveling nut in the pre-embedded leveling device that is away from the equipment foundation structure.

[0065] S106. According to the splicing sequence, the splicing steel plates are placed on the top surface of the first leveling nut, and the bottom surface of the splicing steel plates overlaps the top surface of the support plate. The pre-embedded bolts pass through the first bolt holes of the splicing steel plates, and the clamping nuts are fixed to the pre-embedded bolts to clamp the top surface of the splicing steel plates.

[0066] S107. After each spliced ​​steel plate is placed, the elevation of all the first bolt holes on the spliced ​​steel plate is checked, and the elevation of the first bolt holes on both sides of the splice joint is also checked; the splice joint is formed by the spliced ​​steel plate and the previously placed spliced ​​steel plate; if the elevation difference between two first bolt holes exceeds the preset range, the pre-embedded leveling device corresponding to the spliced ​​steel plate is readjusted until the elevation difference of all the first bolt holes on the spliced ​​steel plate and the elevation difference of the first bolt holes on both sides of the splice joint meet the preset range before the next spliced ​​steel plate is placed.

[0067] S108. After all the spliced ​​steel plates are in place and leveled, apply the same preload to all the clamping nuts.

[0068] The aforementioned leveling method for spliced ​​steel plates can solve the problems of flatness and positional accuracy of mounting holes on both sides of the steel plate joints. A leveling system is formed through a series of joint leveling devices and pre-embedded leveling devices, ensuring consistent flatness of the overall steel plate formed by different spliced ​​steel plates and guaranteeing the positional accuracy of the precision equipment mounting holes reserved on the steel plate. The positional accuracy of the mounting holes can be controlled to 0.01mm. The joint leveling device provides a high-precision support plane for the spliced ​​steel plates, reducing warping at the joints and improving the horizontal accuracy of the spliced ​​steel plates at the joints. The pre-embedded leveling device provides a dense support surface for each steel plate, consisting of leveling nuts. Simultaneously, tightening the nuts provides a downward constraint force for each steel plate, reducing warping deformation caused by localized impacts during steel plate hoisting and placement. It can correct for concave and convex features in the middle of the spliced ​​steel plate, improving the flatness of individual steel plates and ensuring the positional accuracy of the equipment mounting holes on both sides of the joint.

[0069] Specifically, refer to Figure 2The leveling process of the joint leveling device is as follows: First, the splicing sequence is determined based on the parameters of the equipment foundation structure 1 (such as a steel frame or reinforcing cage) and the shape and size of the splicing steel plates 2. Then, multiple joint leveling devices are arranged on the equipment foundation structure 1 according to the parameters of the splicing steel plates 2, and then the joint leveling devices are adjusted. The joint leveling device includes a support plate 11 and at least three leveling components 12. The support plate 11 is connected to the equipment foundation structure 1 through at least three leveling components 12, and three of the at least three leveling components 12 are arranged in a triangular layout. This arrangement allows at least three leveling components 12 to define a support plane. The levelness of the top surface of the support plate 11 can be further adjusted by adjusting at least three leveling components 12, so that the elevation difference of multiple preset control points on the top surface of the support plate 11 meets the preset range, and the elevation of the top surface of the support plate 11 in all joint leveling devices is leveled. When the splicing steel plate 2 is placed on the top surface of the support plate 11, the flatness of the splicing steel plate 2 joint can be improved.

[0070] After the installation and adjustment of the joint leveling device are completed, in order to improve the local flatness of each spliced ​​steel plate 2, multiple pre-embedded leveling devices need to be added. First, multiple pre-embedded leveling devices are arranged in a rectangular array on the equipment foundation structure 1, and then the multiple pre-embedded leveling devices are adjusted. In this embodiment, the pre-embedded leveling devices are welded to the equipment foundation steel frame or reinforcing cage at 1m*1m intervals to serve as the support system for the spliced ​​steel plates 2.

[0071] Reference Figure 4The leveling process of the pre-embedded leveling device is as follows: (1) The pre-embedded bolt 21 in the pre-embedded leveling device is welded to the equipment foundation structure 1. The first leveling nut 22 in the pre-embedded leveling device is threadedly connected to the pre-embedded bolt 21. According to the elevation of the top surface of the support plate, the elevation of the top surface of the first leveling nut 22 in multiple pre-embedded leveling devices is adjusted up and down in sequence. A high-precision level is used to uniformly level all the top surfaces of the first leveling nuts 22, that is, to ensure that the top surface of the support plate and the top surface of the first leveling nut 22 are on the same horizontal plane, so that the difference between the elevation of the top surface of the support plate and the elevation of the top surface of the first leveling nut 22 in the pre-embedded leveling device meets the preset range. When the spliced ​​steel plate 2 is placed on the top surface of the support plate, it can be ensured that the splice seam of the spliced ​​steel plate 2 and the middle part of the spliced ​​steel plate 2 are on the same horizontal plane, and the accuracy error does not exceed 0.01mm. This method can improve the adjustment efficiency of obtaining consistent accuracy of the spliced ​​steel plate 2. (2) Then, according to the splicing sequence, the spliced ​​steel plates 2 are hoisted and placed onto the top surface of the first leveling nut 22 in the multiple pre-embedded leveling devices, and the joint of the spliced ​​steel plates 2 overlaps with the top surface of the support plate 11. After being placed, the clamping nut 23 in the pre-embedded leveling device is fixed. It should be noted that the spliced ​​steel plates 2 are provided with first bolt holes 25 corresponding to the positions of the pre-embedded bolts 21. The part of the pre-embedded bolt 21 protruding from the first leveling nut 22 in the pre-embedded leveling device is inserted into the first bolt hole 25, and the top surface of the first leveling nut 22 in the pre-embedded leveling device abuts against the bottom surface of the spliced ​​steel plates 2. The clamping nut 23 is threadedly connected to the pre-embedded bolt 21, and the first bolt hole 25 of the spliced ​​steel plates 2 has space to accommodate the clamping nut 23, that is, the first bolt hole 25 is a shape that is wider at the top and narrower at the bottom (e.g., Figure 5 As shown in the figure, D can be 90, E can be 84, and F can be 40). When installing the clamping nut 23, a prestressed wrench is required. By controlling the value of the wrench, a certain local downward constraint force is applied to the spliced ​​steel plate 2 after it is placed, so as to adjust the flatness of the spliced ​​steel plate 2 and further reduce the deformation problem caused by the spliced ​​steel plate 2 due to its own weight or local small impact during hoisting and placement. (3) After each spliced ​​steel plate 2 is placed and the clamping nut 23 is fixed, a high-precision level is required to check the elevation of all the first bolt holes 25 on the spliced ​​steel plate 2. If the elevation difference between two first bolt holes 25 exceeds the preset range, the height of the clamping nut 23 in the pre-embedded leveling device needs to be readjusted or the spliced ​​steel plate 2 needs to be hoisted and moved by multiple pre-embedded leveling devices, and the elevation of the top surface of the first leveling nut 22 in multiple pre-embedded leveling devices needs to be readjusted so that the elevation difference of all the first bolt holes 25 meets the preset range. Only after the check is qualified can the next spliced ​​steel plate 2 be installed. (4) After all the spliced ​​steel plates 2 are in place and leveled, apply the same preload to all the clamping nuts 23.

[0072] It should be noted that during the leveling process of the subsequent splicing steel plate 2, it is necessary not only to check the elevation of the multiple first bolt holes 25 of this splicing steel plate 2 to ensure that the elevation difference is within 0.01mm, but also to verify whether the positional accuracy of the first bolt holes 25 on both sides of the splice joint between this splicing steel plate 2 and the previous splicing steel plate 2 reaches 0.01mm. If the positional accuracy does not meet the standard, the subsequent splicing of the splicing steel plate 2 cannot proceed. It is necessary to lift and move the pre-embedded leveling device of the splicing steel plate 2, readjust the first leveling nuts 22 in the adjacent pre-embedded leveling devices on both sides of the splice joint, and measure again until the elevation difference of the first bolt holes 25 on both sides of the splice joint meets the preset range. This can solve the problem of cumulative error in the flatness of the splicing steel plate 2 and improve the positional accuracy of the precision equipment mounting holes on both sides of the splice joint.

[0073] It should be noted that the splicing order needs to be determined according to the actual splicing shape. For example, referring to Figures 7(a), 7(b), 7(c), and 7(d), when the splicing shape is rectangular, it needs to be spliced ​​along the length direction; when the splicing shape is cross-shaped, it needs to be spliced ​​according to the principle of splicing the center first and then the surrounding area; when the splicing shape is L-shaped, it needs to be spliced ​​according to the order of splicing the corners first and then extending to both sides; when the splicing shape is a rectangle with long flanges, it needs to be spliced ​​according to the principle of splicing the middle first and then the two sides along the length direction.

[0074] This application combines an independent seam leveling device with a pre-embedded leveling device to form a leveling system that takes into account both the planar accuracy at the seam and the planar accuracy of each point in the middle of a single steel plate, thereby improving the adjustment efficiency for achieving consistent accuracy of spliced ​​steel plates.

[0075] In some embodiments, the leveling assembly 12 includes a leveling bolt 121 and a second leveling nut 122, the leveling bolt 121 and the second leveling nut 122 are threadedly connected, and the portion of the leveling bolt 121 protruding from the second leveling nut 122 is inserted into the support plate 11, and the support plate 11 abuts against the second leveling nut 122.

[0076] The levelness of the top surface of the support plate 11 is adjusted by at least three leveling components 12 so that the elevation difference of multiple preset control points on the top surface of the support plate 11 meets a preset range, including:

[0077] The levelness of the top surface of the support plate 11 is adjusted by adjusting the position of the second leveling nut 122 relative to the leveling bolt 121 in at least three leveling components 12.

[0078] In one possible implementation, refer to Figure 2The leveling assembly 12 includes three leveling bolts 121 and three second leveling nuts 122. The three leveling bolts 121 are all welded to the steel frame of the equipment foundation structure 1, and are arranged in a triangular pattern, i.e., not collinear, to form a supporting plane. The second leveling nuts 122 are threadedly connected to the leveling bolts 121. (Refer to...) Figure 3 The support plate 11 and the three leveling bolts 121 are respectively provided with through holes 111 with a size of φ32mm. The part of the leveling bolt 121 protruding from the second leveling nut 122 is inserted into the through hole 111 of the support plate 11, and the top surface of the second leveling nut 122 abuts against the bottom surface of the support plate 11. In this embodiment, the levelness of the top surface of the support plate 11 is adjusted by adjusting the vertical position of the three second leveling nuts 122 relative to the leveling bolts 121, so that the elevation difference of multiple preset control points on the top surface of the support plate 11 meets the preset range.

[0079] It should be noted that the position of the through hole 111 of the support plate 11 should be avoided as much as possible from the splicing seam of the splicing steel plate in order to improve the levelness of the support plate at the splicing seam.

[0080] In some embodiments, the support plate 11 is a rectangular plate, and the plurality of preset control points include the four corner points and the geometric center point of the support plate 11.

[0081] In one possible implementation, the support plate 11 is a rectangular plate. Preset control points are determined at the four corner points and the geometric center point of the support plate 11. Then, a high-precision level is used to measure the elevation of the five preset control points to ensure that the elevation difference of each preset control point of a single support plate 11 is within 0.01mm.

[0082] In some embodiments, the bottom surface of the splicing steel plate overlaps the top surface of the support plate 11, including:

[0083] The splicing steel plate is a rectangular plate, and the four corner points of the bottom surface of the splicing steel plate correspond to the top surface of a support plate 11.

[0084] In one possible implementation, refer to Figure 6 Each splicing steel plate 2 is a rectangular plate, and each of the four corner points of the splicing steel plate 2 must correspond to the top surface of a support plate 11. It should be noted that adjacent corner points at the joint of two splicing steel plates 2 correspond to the top surface of one support plate 11. For example, one splicing steel plate 2 corresponds to four support plates 11, two splicing steel plates 2 correspond to six support plates 11, three splicing steel plates 2 correspond to eight support plates 11, and four splicing steel plates 2 correspond to ten support plates 11. Each support plate needs to have predetermined control points, and the elevation of these control points must be measured and leveled using a high-precision level to ensure that the average elevation error of the predetermined control points for each support plate is controlled within 0.01mm.

[0085] In some embodiments, the levelness of the top surface of the support plate 11 is adjusted by at least three leveling components 12 so that the elevation difference of multiple preset control points on the top surface of the support plate 11 meets a preset range, and then the method further includes:

[0086] The second leveling nut 122 and the support plate 11 in each joint leveling device are welded together, and the leveling bolts that extend beyond the support plate are cut off and ground flat.

[0087] In one possible implementation, refer to Figure 2 Once the elevation difference of each preset control point of a single support plate 11 is within 0.01mm, and the error accuracy of the average elevation of each preset control point of the support plate 11 is controlled within 0.01mm, then the leveling of each support plate 11 is complete. Afterwards, the second leveling nut 122 needs to be welded to the support plate 11, and the leveling bolts 121 extending beyond the support plate 11 need to be trimmed and ground smooth. It should be noted that when the through hole 111 of the support plate 11 is located at the joint of the spliced ​​steel plates, the grinding accuracy at this location should be further improved to enhance the levelness of the support plate 11 at the joint.

[0088] In some embodiments, after all the spliced ​​steel plates 2 are seated and leveled, the same preload is applied to all the clamping nuts 23, and then the process further includes:

[0089] Pre-embedded fine adjustment devices are arranged in a rectangular array on the equipment foundation structure 1. The interval between two adjacent pre-embedded fine adjustment devices is 1m, and they are arranged alternately with the pre-embedded leveling devices. The pre-embedded fine adjustment devices include fine adjustment bolts 31 and second cover plates 32, and the fine adjustment bolts 31 penetrate the second bolt holes 33 of the splicing steel plates 2.

[0090] The elevation of each of the second bolt holes 33 is measured one by one to obtain the elevation of each second bolt hole 33 and the initial flatness of the splicing steel plate 2. The elevations of all the second bolt holes 33 are sorted from high to low to determine the fine adjustment sequence. According to the fine adjustment sequence, the fine adjustment bolts 31 in all the pre-embedded fine adjustment devices are adjusted so that the elevation difference of the second bolt holes 33 and the flatness of the splicing steel plate 2 meet the preset range. The second cover plate 32 is then placed over the second bolt holes 33.

[0091] In one possible implementation, to further improve the leveling accuracy of key control areas of the spliced ​​steel plates, especially the positional accuracy of equipment mounting holes in edge areas prone to warping, such as near the sides of the splice joint, further local fine-tuning of the flatness of the spliced ​​steel plates is required. Therefore, this application embodiment also provides a pre-embedded fine-tuning device. Specifically, refer to... Figure 10Multiple pre-embedded fine-tuning devices are arranged in a rectangular array with a spacing of 1m*1m on the equipment foundation structure 1, and these devices are arranged alternately with the aforementioned pre-embedded leveling devices. The multiple pre-embedded fine-tuning devices are then adjusted. It should be noted that during the fine-tuning process, the deformation of the spliced ​​steel plates is within the elastic range. That is, for the pre-embedded fine-tuning devices on both sides of the precision equipment mounting hole, when one side of the device is screwed down, the steel plate on the other side will slightly tilt upwards. This method allows for high-precision correction of locally high or low positions on the spliced ​​steel plates.

[0092] The leveling process of the pre-embedded fine adjustment device is as follows: (1) First, place the 80*80*8mm shim 34 into the second bolt hole 33 of the splicing steel plate 2. The structure of the second bolt hole 33 is as follows: Figure 11 As shown (D' can be 90, E' can be 84, F' can be 30), a high-precision electronic level is used to measure the elevation of all the second bolt holes 33 to obtain the elevation of each second bolt hole 33 and the initial flatness of the spliced ​​steel plate 2 before fine adjustment. (2) According to the order of the elevation of the second bolt holes 33 from high to low, the fine adjustment bolts 31 are placed into the second bolt holes 33 in sequence and rotated and pressed down to make local fine adjustments to the positions of the spliced ​​steel plate 2 that are too high or too low. When the flatness of the spliced ​​steel plate 2 reaches 0.5mm and the position accuracy of the second bolt holes 33 reaches 0.01mm, the fine adjustment is in place. (3) Then, as shown in the figure Figure 12 The second cover plate 32 shown covers the second bolt hole 33.

[0093] In some embodiments, the pre-embedded leveling device further includes a first cover plate 24;

[0094] The second cover plate 32 is fitted onto the second bolt hole 33, and then the following is also included:

[0095] Weld all the corresponding first leveling nuts 22, clamping nuts 23 and pre-embedded bolts 21; spot weld all the clamping nuts 23 to the splicing steel plate 2 and cover the first cover plate 24 with the first bolt hole 25.

[0096] In one possible implementation, refer to Figure 4 After all the spliced ​​steel plates are seated, leveled, and checked, all corresponding first leveling nuts 22, clamping nuts 23, and pre-embedded bolts 21 are welded together to resist external vibrations from damaging the leveling accuracy of the entire spliced ​​steel plate 2. Then, the clamping nuts 23 are spot-welded to the spliced ​​steel plate 2 for fixation, and so on. Figure 8 The first cover plate 24 shown is fitted onto the first bolt hole 25, which means that the spliced ​​steel plate 2 has been installed and leveled.

[0097] It should be noted that, referring to Figure 3 , Figure 9 and Figure 13 In this embodiment, the dimensions of the support plate 11 can be 250mm*500mm*30mm, and the position of the through hole 111 is as follows: Figure 3 As shown in the diagram; the leveling bolt 121 is M30; the embedded bolt 21 is at least 160mm long and is a T-bolt; the fine-tuning bolt 31 is Hmm long. It should be noted that the length of the fine-tuning bolt 31 needs to be adjusted adaptively according to the thickness of the spliced ​​steel plate. For example, when the thickness of the spliced ​​steel plate is 100mm, the length H of the fine-tuning bolt 31 can be 125mm, meaning the extra 25mm ensures sufficient adjustment margin. It is understandable that, depending on the actual thickness of the spliced ​​steel plate, the length of the fine-tuning bolt 31 can also be 127mm, 126mm, 124mm, 123mm, 122mm, 121mm, 120mm, etc. When the length of the fine-tuning bolt 31 is short, the thickness of the shim 34 below it or the number of shims 34 can be increased to ensure that the fine-tuning bolt 31 and the shim 34 maintain contact in the initial state, and the fine-tuning of the spliced ​​steel plate can be achieved by loosening or tightening the fine-tuning bolt 31.

[0098] In some embodiments, the pitch of the fine-tuning bolt 31 satisfies the following formula: P = 1 / n × d; where P represents the pitch, and P is 1 / 10 of the standard pitch, n represents the number of threads per inch or per millimeter, and d represents the diameter of the fine-tuning bolt 31.

[0099] For example, typically when the bolt diameter d is 30mm, its pitch P = 0.03937d ≈ 1.181mm. Assuming the required positional accuracy of the mounting hole is 0.01mm, the number of rotations needed to achieve this adjustment can be calculated: Number of rotations required to adjust by 0.01mm = Adjustment distance / Pitch ≈ 0.01mm / 1.181mm ≈ 0.00846 rotations. Therefore, to adjust a 30mm diameter bolt, it needs to be rotated approximately 0.00846 times, which is quite difficult for a worker to do manually. Therefore, in the embodiment of this application, when processing the fine-tuning bolt 31 of M30, a bolt with a denser pitch was customized, that is, the number of threads of the bolt was increased, so that its pitch was reduced by an order of magnitude, namely P = 0.003937d. At this time, the number of rotations required to adjust by 0.01mm = adjustment distance / pitch = 0.01mm / 0.11811mm ≈ 0.08458 rotations, which is very beneficial for worker operation control.

[0100] In some embodiments, when spliced ​​steel plates are used as high-precision mounting surfaces for equipment foundation structures, in order to increase the warping resistance of the spliced ​​steel plates themselves, their processing requirements must meet the following:

[0101] The thickness of the splicing steel plates is ≥100mm, such as 100mm, 101mm, 102mm, 103mm, 104mm, 105mm, 106mm, 107mm, 108mm, 109mm, 110mm, etc.

[0102] The surface roughness of the spliced ​​steel plates is ≤3.2μm, such as 3.2μm, 3.1μm, 3.0μm, 2.9μm, 2.8μm, 2.7μm, 2.6μm, 2.5μm, 2.4μm, 2.3μm, 2.2μm, 2.1μm, etc.

[0103] The flatness positional tolerance of the spliced ​​steel plates is ≤0.5μm, for example, 0.5μm, 0.45μm, 0.4μm, 0.35μm, 0.3μm, 0.25μm, 0.2μm, 0.15μm, 0.1μm, 0.05μm, etc.

[0104] The straightness position tolerance of the spliced ​​steel plates is ≤3.05μm, such as 3.05μm, 3.00μm, 2.95μm, 2.90μm, 2.85μm, 2.80μm, 2.75μm, 2.70μm, 2.65μm, 2.60μm, etc.

[0105] In addition, the positional accuracy of the precision equipment mounting holes on the spliced ​​steel plate is ≤0.01μm, such as 0.01μm, 0.009μm, 0.008μm, 0.007μm, 0.006μm, 0.005μm, etc.

[0106] In some embodiments, before hoisting the spliced ​​steel plate to the top surface of the first leveling nut 22 in a plurality of pre-embedded leveling devices, the method further includes:

[0107] Provide multiple square timbers and arrange them in an array, then place a layer of spliced ​​steel plate on the square timber array.

[0108] In some embodiments, a layer of spliced ​​steel plate is placed on the square timber array, and then the process further includes:

[0109] A layer of frame is laid on a layer of spliced ​​steel plate, and then the layer of spliced ​​steel plate is placed on the frame.

[0110] In one possible implementation, to avoid ground moisture or accidental water corrosion contaminating the spliced ​​steel plates and affecting their accuracy, and to prevent warping and deformation of the spliced ​​steel plates due to improper storage and hoisting, which would also affect installation accuracy, this application embodiment places the spliced ​​steel plates on an array of square timbers spaced no more than 1 meter apart at the construction site. It should be noted that the distance between the square timbers needs to be determined based on the performance parameters of the spliced ​​steel plates themselves, such as their material, weight, and yield strength. To avoid directly stacking the spliced ​​steel plates, this application also provides a temporary placement rack placed on the first layer of spliced ​​steel plates, allowing the second layer of spliced ​​steel plates to be placed on the rack, with a maximum of two layers of spliced ​​steel plates stacked.

[0111] In some embodiments, the method for leveling spliced ​​steel plates further includes: setting the lifting point in the direction of the short side of the spliced ​​steel plate before hoisting the spliced ​​steel plate, and the lifting point is located at 1 / 4L from the corner point of the spliced ​​steel plate, where L represents the length of the short side of the spliced ​​steel plate.

[0112] In one possible implementation, to prevent severe deformation of the spliced ​​steel plates during hoisting, this application provides a lifting device with two lifting points on each of the two short sides of the spliced ​​steel plates, located approximately 1 / 4L from the corner points. The lifting lugs are connected to the spliced ​​steel plates via pre-installed bolt threads. During hoisting, a steel wire rope is used to connect to a bridge crane inside the factory building to lift and place the spliced ​​steel plates into position.

[0113] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method for leveling spliced ​​steel plates, characterized in that, include: Determine the splicing order; The splicing sequence is determined based on the parameters of the equipment's basic structure and the parameters of the splicing steel plates, including shape and size. Multiple joint leveling devices are arranged on the equipment base structure corresponding to the joint positions of the splicing steel plates. The positions of the joint leveling devices are determined based on the parameters of the splicing steel plates. Each joint leveling device includes a support plate and at least three leveling components. The support plate is connected to the equipment base structure through the at least three leveling components, and three of the at least three leveling components are arranged in a triangular layout. The levelness of the top surface of the support plate is adjusted by the at least three leveling components so that the elevation difference of multiple preset control points on the top surface of the support plate meets the preset range; and the elevation of the top surface of the support plate in all the joint leveling devices is leveled; the top surface of the support plate is the surface of the support plate facing away from the equipment foundation structure. Pre-embedded leveling devices are arranged in a rectangular array on the basic structure of the equipment, and the interval between two adjacent pre-embedded leveling devices is 1m; the pre-embedded leveling device includes a pre-embedded bolt, a first leveling nut and a clamping nut; the first leveling nut provides an upward support surface for the spliced ​​steel plate, and the clamping nut provides a downward constraint force for the spliced ​​steel plate; The elevation of the top surface of the first leveling nut in all the pre-embedded leveling devices is uniformly measured according to the elevation of the top surface of the support plate; the top surface of the first leveling nut in the pre-embedded leveling device is the surface of the first leveling nut in the pre-embedded leveling device that is away from the equipment foundation structure. According to the splicing sequence, the spliced ​​steel plates are placed on the top surface of the first leveling nut, and the bottom surface of the spliced ​​steel plate overlaps the top surface of the support plate at the joint. The pre-embedded bolts pass through the first bolt holes of the spliced ​​steel plates, and the clamping nuts are fixed to the pre-embedded bolts to clamp the top surface of the spliced ​​steel plates. After each spliced ​​steel plate is placed, the elevation of all the first bolt holes on the spliced ​​steel plate is checked, and the elevation of the first bolt holes on both sides of the splice joint is also checked; wherein the splice joint is formed by the spliced ​​steel plate and the previously placed spliced ​​steel plate; if the elevation difference between two first bolt holes exceeds the preset range, the pre-embedded leveling device corresponding to the spliced ​​steel plate is readjusted until the elevation difference of all the first bolt holes on the spliced ​​steel plate and the elevation difference of the first bolt holes on both sides of the splice joint meet the preset range before the next spliced ​​steel plate is placed; After all the spliced ​​steel plates are in place and leveled, apply the same preload to all the clamping nuts.

2. The leveling method according to claim 1, characterized in that, The leveling assembly includes a leveling bolt and a second leveling nut. The leveling bolt is threadedly connected to the second leveling nut, and the portion of the leveling bolt protruding from the second leveling nut is inserted into the support plate, and the support plate abuts against the second leveling nut. The levelness of the top surface of the support plate is adjusted by the at least three leveling components so that the elevation difference of multiple preset control points on the top surface of the support plate meets a preset range, including: The levelness of the top surface of the support plate is adjusted by adjusting the position of the second leveling nut relative to the leveling bolt in the at least three leveling components.

3. The leveling method according to claim 2, characterized in that, The step of adjusting the levelness of the top surface of the support plate using at least three leveling components to ensure that the elevation difference between multiple preset control points on the top surface of the support plate meets a preset range, and then further includes: The second leveling nut and support plate in each of the joint leveling devices are welded together, and the leveling bolts that extend beyond the support plate are cut off and ground flat.

4. The leveling method according to claim 1, characterized in that, The bottom surface of the spliced ​​steel plate overlaps the top surface of the support plate, including: The splicing steel plate is a rectangular plate, and the four corner points of the bottom surface of the splicing steel plate correspond to the top surface of the support plate.

5. The leveling method according to claim 1, characterized in that, The support plate is a rectangular plate, and the plurality of preset control points include the four corner points and the geometric center point of the support plate.

6. The leveling method according to claim 1, characterized in that, After all the spliced ​​steel plates are seated and leveled, the same preload is applied to all the clamping nuts, followed by: Pre-embedded fine-tuning devices are arranged in a rectangular array on the equipment foundation structure, with a 1m interval between two adjacent pre-embedded fine-tuning devices, and are arranged alternately with the pre-embedded leveling devices; each pre-embedded fine-tuning device includes a fine-tuning bolt and a second cover plate, and the fine-tuning bolt passes through the second bolt hole of the splicing steel plate. The elevation of each of the second bolt holes is measured one by one to obtain the elevation of each second bolt hole and the initial flatness of the spliced ​​steel plate; the elevations of all the second bolt holes are sorted from high to low to determine the fine adjustment sequence; the fine adjustment bolts in all the pre-embedded fine adjustment devices are adjusted according to the fine adjustment sequence to make the elevation difference of the second bolt holes and the flatness of the spliced ​​steel plate meet the preset range; and the second cover plate is then placed over the second bolt holes.

7. The leveling method according to claim 6, characterized in that, The pre-embedded leveling device also includes a first cover plate; The process of fitting the second cover plate onto the second bolt hole further includes: Weld all the corresponding first leveling nuts, clamping nuts and pre-embedded bolts together; spot weld all the clamping nuts to the splicing steel plate and cover the first cover plate with the first bolt hole.

8. The leveling method according to claim 6, characterized in that, The pitch of the fine-tuning bolt satisfies the following formula: P = 1 / n × d; where P represents the pitch, and P is 1 / 10 of the standard pitch, n represents the number of threads per inch or per millimeter, and d represents the diameter of the fine-tuning bolt.

9. The leveling method according to claim 1, characterized in that, The thickness of the splicing steel plate is ≥100mm; The surface roughness of the spliced ​​steel plate is ≤3.2μm; The flatness positional tolerance of the spliced ​​steel plates is ≤0.5μm; The straightness position tolerance of the spliced ​​steel plates is ≤3.05μm.

10. The leveling method according to claim 1, characterized in that, The step of hoisting the spliced ​​steel plate onto the top surface of the first leveling nut in the plurality of pre-embedded leveling devices also includes: Multiple square timbers are provided and arranged in an array, and a layer of spliced ​​steel plate is placed on the square timber array.

11. The leveling method according to claim 10, characterized in that, The process of placing a layer of spliced ​​steel plate on the square timber array further includes: A frame is laid on the spliced ​​steel plate, and the spliced ​​steel plate is placed on the frame.

12. The leveling method according to claim 4, characterized in that, Also includes: Before hoisting the spliced ​​steel plate, the hoisting point is set in the direction of the short side of the spliced ​​steel plate, and the hoisting point is located at 1 / 4L from the corner point of the spliced ​​steel plate, where L represents the length of the short side of the spliced ​​steel plate.

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