Modularized installation method for annular suspension ring bearing beam and annular rail

Abstract

The invention belongs to a mounting method, and particularly relates to a modular mounting method for a ring hanging ring bearing beam and a ring rail. The method comprises the following steps: step 1, arranging a supporting tool; secondly, the ring bearing beam and the ring rail are assembled on the ground; 3, measuring and collecting data; 4, bracket measurement setting-out and drilling are carried out; 5, adjusting base plate primary machining; sixthly, the ring bearing beam and the ring rail are integrally hoisted and installed; seventhly, the adjusting base plate is subjected to finish machining; and 8, overall inspection and acceptance of the ring bearing beam and the ring rail are conducted. The method has the remarkable effects that (1) the disassembly and the repeated hoisting after the ground pre-assembly are avoided, and the assembly workload in a plant is reduced; and (2) the construction method meets the design, installation and use requirements of the ring bearing beam and the ring rail, and the operability is high. And (3) the construction method meets the actual requirements of an engineering site, the safety risk of crossing and high-place operation can be effectively reduced, meanwhile, the construction difficulty is reduced, and the construction efficiency and quality are improved.

Description

Technical Field

[0001] This invention pertains to installation methods, specifically a modular installation method for a ring-type crane bearing beam and a ring rail. Background Technology

[0002] In nuclear power engineering projects, the ring crane (referred to as "ring crane") is the most critical hoisting equipment within the nuclear reactor building. It is mainly used for hoisting the main reactor equipment and for fuel replacement. Its design requirements are special, with a large size, structure, and weight, demanding high precision, reliability, and safety in hoisting and positioning. In previous similar projects, the ring crane's ring support beam and ring rail were typically installed by first hoisting the ring support beam segment by segment onto the pre-installed steel brackets within the nuclear reactor building. After adjustment and assembly according to design requirements, the ring rail was then hoisted segment by segment onto the ring support beam for adjustment and installation. This construction method suffers from problems such as frequent hoisting operations, overlapping and high-altitude work, and limited operating space, resulting in high installation difficulty, high safety risks, low construction efficiency, and difficulty in controlling construction quality.

[0003] Therefore, a new method for ring-mounted installation is needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a modular installation method for ring-mounted crane ring bearing beams and ring rails.

[0005] This invention is implemented as follows: a modular installation method for a ring-type crane bearing beam and a ring rail, comprising the following steps:

[0006] Step 1: Setting up the supporting fixtures;

[0007] Step 2: Assemble the ring bearing beam and the ring track on the ground;

[0008] Step 3: Measure and collect data;

[0009] Step 4: Measure and lay out the guide lines and drill holes;

[0010] Step 5: Adjust the initial processing of the pad;

[0011] Step Six: Integral hoisting and installation of the ring bearing beam and ring rail;

[0012] Step 7: Adjust the precision machining of the shim plate;

[0013] Step 8: Overall acceptance of the ring bearing beam and ring track.

[0014] The modular installation method for a ring-type crane ring bearing beam and ring rail as described above, wherein step one includes the following:

[0015] Step 1.1: Select a site for assembling the ring bearing beam. The size of the site, the flatness and strength of the ground should meet the assembly requirements of the ring bearing beam, and the selected site should be within the lifting range of the crane used to position the ring bearing beam.

[0016] Step 1.2: The assembly of the ring bearing beam and the ring track on the ground requires temporary concrete supports. These supports consist of concrete piers, embedded steel plates, and adjusting screws. At least two concrete supports must be placed under each section of the ring bearing beam. The number of concrete supports depends on the number of sections of the ring bearing beam.

[0017] Step 1.3: Using a total station or other surveying tools, mark the position of each concrete support. Install the concrete supports according to the marked positions, using C30 concrete.

[0018] The concrete support consists of a pre-embedded steel plate at the top and a concrete pier below the pre-embedded steel plate. Adjusting screws are installed under each pre-embedded steel plate, with three adjusting screws on each plate.

[0019] Step 1.4: When setting up concrete supports, ensure that the upper surface of the concrete supports is at the same elevation, and control the elevation deviation within ±10mm.

[0020] As described above, in a modular installation method for a ring-type crane bearing beam and a ring rail, step two includes the following:

[0021] Step 2.1: Clean the rust-preventive oil and other impurities and foreign objects from the connection end face of the ring bearing beam using a cleaning agent and a white cloth. Inspect the end face joint until no impurities, foreign objects, or defects are visible to the naked eye.

[0022] Step 2.2: Use a truck crane to lift each section of the ring bearing beam onto the concrete support. Ensure that the elongated holes at the bottom of each ring bearing beam are easily measurable. The support should not be placed directly below the bolt holes, and the ring bearing beam should be in complete contact with the concrete support without tilting or instability. If these requirements are not met, adjustments can be made using shims.

[0023] Step 2.3: Adjust the position of the rail support beam using the adjusting screws to ensure that the rail support beam is aligned with the circumference line and that the ellipticity of the rail support beam meets the requirements.

[0024] Step 2.4: After the position of the ring bearing beam is adjusted, connect each section of the ring bearing beam with connecting bolts and pre-tighten them.

[0025] Step 2.5: Mark the center line of the ring rail pad and the installation position of the ring rail adjusting bolt fixing plate on the upper surface of the ring bearing beam. The ring rail pad includes a grooved pad and a combined pad.

[0026] Step 2.6: Grind the surface to be welded on the top of the ring bearing beam, weld the ring rail adjusting bolt fixing plate and the positioning groove shim plate, and fix them with the adjusting bolts.

[0027] Step 2.7: Using a truck crane, assemble the rails according to the marked or planned sequence, hoisting each rail section onto the ring bearing beam, aligning the center of the rail with the center of the ring bearing beam.

[0028] Step 2.8: Adjust the ring rail by adding combination shims and adjusting bolts to ensure that the ring rail radius deviation, height difference, ellipticity, height difference at the joint, horizontal misalignment, and clearance meet the design requirements.

[0029] The combined pad includes a grooved block, a track is set in the groove of the grooved block, a pressure plate is set on the grooved block, the space formed by the grooved block and the pressure plate limits the track, a wedge block is set between the track and the grooved block, and the pressure plate is fixedly connected to the grooved block by bolts and washers. A limiting assembly composed of steel plates, bolts and nuts is set on the side of the combined pad.

[0030] Step 2.9: After all assembly parameters of the track meet the design requirements, weld and fix the groove blocks and combination pads under the track, ensuring the weld height meets the drawing requirements; fully weld the track adjusting bolt fixing plate to the ring bearing beam, and tighten the track pressure plate bolts, ensuring the tightening torque meets the design requirements. Tighten in two stages: 50% for the first time and 100% for the second.

[0031] Step 2.10: Mark the contact points between the lower cover plate of the ring bearing beam and the corbel to ensure that subsequent ring bearing beams are assembled with the corbels in the exact same order and position as on the ground.

[0032] Step 2.11: Check that the keys and pins at each ring bearing beam connection can be installed normally. If the dimensions are not met, process the keys and pins appropriately before installing the keys and pins at the ring bearing beam connection.

[0033] As described above, in a modular installation method for a ring-type crane bearing beam and a ring rail, step three includes the following:

[0034] Step 3.1: After the ring bearing beam and ring rail are assembled on the ground, measure the corresponding coordinate data of the inner and outer bolt holes of each ring bearing beam relative to the center of the ring bearing beam, and number the bolt holes.

[0035] Step 3.2: After measuring the bolt hole locations, use a total station or steel tape measure to measure the vertical distance between the ring bearing beam and each corbel connection point, and between the upper and lower cover plates of the ring bearing beam. Measure 5 sets of data at each location. The specific measurement locations for the 5 sets of data are the four corners of the pad and the center of the pad. Number the data at each location to prevent data confusion.

[0036] Step 3.3: During the measurement process, the influence of the external environment, especially the influence of temperature, should be considered. Measurements should be taken multiple times over different time periods, and the average value should be taken.

[0037] As described above, in a modular installation method for a ring-type crane bearing beam and a ring rail, step four includes the following:

[0038] Step 4.1: Mark the radial and angular center lines on the bracket, and preliminarily determine whether the bracket position is qualified or meets the installation requirements of the ring lifting ring bearing beam based on the radial and angular center lines.

[0039] Step 4.2: Measure and check the elevation of the brackets. Measure the elevation at 5 points for each bracket. Beforehand, mark the edge lines of the ring bearing beam pad based on the radial and angular center lines of the bracket. Mark the elevation measurement points for the brackets at the four corners and the center of the pad. Simultaneously, check the flatness of the upper surface of the brackets. Grind any brackets with significant flatness deviations.

[0040] Step 4.3: To reduce the impact of ambient temperature on measurement and layout deviation, the bolt hole position layout time and bolt hole data acquisition time are within the same time period, and the temperature difference is controlled within 2℃.

[0041] Step 4.4: Transfer the bolt hole positions measured on the ground to the bracket and mark them with lines; drill holes in the bracket using a magnetic drill according to the final position of the marked bolt hole center.

[0042] As described above, in a modular installation method for a ring-type crane bearing beam and a ring rail, step five includes the following:

[0043] Step 5.1: Based on the measured elevation data of the corbel and the height data between the upper and lower cover plates of the ring bearing beam at the installation position of the pad, calculate the thickness data of the pad.

[0044] Step 5.2: Based on the calculated data, perform initial machining on the pad, leaving a 6mm machining allowance for the initial machining.

[0045] Step 5.3: Before processing the pads, number and label each pad to ensure that the pads are processed according to the measured and calculated data.

[0046] As described above, in a modular installation method for a ring-type crane bearing beam and a ring rail, step six includes the following:

[0047] Step 6.1: Before hoisting, check that all connecting bolts and washers of the ring bearing beam and ring rail are securely tightened to prevent loose bolts and falling foreign objects during hoisting.

[0048] Step 6.2: Use lifting slings, shackles, and wire ropes to connect the crane hook to the ring bearing beam.

[0049] Step 6.3: After the ring bearing beam and ring rail are hoisted into place as a whole, the connecting bolts between the ring bearing beams are retightened to ensure that the connecting bolts did not loosen during the hoisting process and that the tightening torque meets the design requirements.

[0050] Step 6.4: Use jacks to adjust the position of the ring bearing beam and use shims to adjust the elevation, so that the deviation of the ring rail radius, top elevation, height difference, ellipticity, height difference at the joint, horizontal misalignment, and gap on the ring bearing beam meet the design requirements. A wooden partition is installed between the jacks and the bearing beam.

[0051] Step 6.5: After confirming that all installation data meet the requirements, tighten the connecting bolts between the ring bearing beam and the corbel.

[0052] Step 6.6: Measure the gap between the lower cover plate of the ring bearing beam and the corbel. Measure 5 points at each corbel position. The measurement points are located at the four right angles and the center point of the ring bearing beam pad.

[0053] As described above, in a modular installation method for a ring-type crane bearing beam and a ring rail, step seven includes the following:

[0054] Step 7.1: Based on the measured gap data, calculate the machining data for the pad at each bracket position, and perform final machining on the pad according to the data.

[0055] Step 7.2: After the pad is finished, gradually remove the connecting bolts between the ring bearing beam and the bracket. According to the corresponding position of the pad number, install the pad between the ring bearing beam and the bracket until the three holes of the bracket, pad, and ring bearing beam are concentric. Then reconnect the connecting bolts between the ring bearing beam and the bracket and tighten them according to the design torque value.

[0056] As described above, in a modular installation method for a ring-type crane bearing beam and a ring rail, step eight includes the following:

[0057] Step 8.1: Use a total station to measure the radius, elevation, ellipticity, height difference, horizontal misalignment, and gap installation parameters of the ring rail.

[0058] Step 8.2: After confirming that all the final installation technical parameters meet the design requirements, check the tightening torque of the track pressure plate bolts to ensure that the tightening torque of each bolt meets the design requirements.

[0059] The significant effects of this invention are: (1) This construction method enables the ring bearing beam and ring rail to be assembled as a whole outside the factory building and then hoisted into place in one go, avoiding the disassembly and multiple hoisting after pre-assembly on the ground, thus reducing the amount of assembly work inside the factory building. (2) This construction method meets the design, installation and use requirements of the ring bearing beam and ring rail, and is highly operable. (3) This construction method meets the actual needs of the engineering site, effectively reduces the safety risks of cross-operations and high-altitude operations, and at the same time reduces the difficulty of construction and improves construction efficiency and quality. Attached Figure Description

[0060] Figure 1 Schematic diagram of ring bearing beam and track structure

[0061] Figure 2 Schematic diagram of the ring bearing beam assembly site

[0062] Figure 3a Schematic diagram of concrete support structure

[0063] Figure 3b : Figure 3a Schematic diagram of sectional view along the AA direction

[0064] Figure 3c Schematic diagram of steel plate structure

[0065] Figure 4 Schematic diagram of ring bearing beam adjustment

[0066] Figure 5 Track adjustment diagram

[0067] Figure 6 Schematic diagram of ring bearing beam hoisting

[0068] Figure 7 Schematic diagram of ring bearing beam adjustment

[0069] In the diagram: 1. First section of rail support beam, 1a. First bracket, 2. Second section of rail support beam, 2a. Second bracket, n. Nth section of rail support beam, na. Nth bracket, 100. Rail, 200. Concrete support, 300. Embedded steel plate, 301. Concrete pier, 302. Adjusting screw, 400. Rail support beam, 401. Adjusting screw, 501. Rail, 502. Channel block, 503. Pressure plate, 504. Combination pad, 505. Bolt, 506. Washer, 507. Wedge block, 508. Steel plate, 509. Bolt, 510. Nut, 601. Bracket, 602. Lifting sling, 603. Shackle, 604. Wire rope, 701. Wooden partition, 702. Jack, 703. Pad plate Detailed Implementation

[0070] The ring crane in nuclear power plant projects is a large bridge crane, installed on a ring of steel brackets inside the containment vessel of the nuclear reactor. The ring crane mainly consists of a ring support beam, ring rails, a trolley (bridge frame), a traveling trolley, an arch frame, and electrical equipment. Depending on functional requirements, it is equipped with main and auxiliary hooks for lifting equipment within the plant. The lifting capacity of the main hook is generally no less than 200 tons. The supporting components of the ring crane mainly include steel brackets, ring support beams, and ring rails. The ring support beams and ring rails are manufactured in sections, supplied as individual parts to the construction site for assembly and installation. The arc-shaped sections of the ring support beams are connected to each other and to the brackets using high-strength bolts. The ring rails are fixed to the upper surface of the ring support beams using pressure plates and bolts. Finally, after the ring support beams and ring rails are installed as a whole, they form a concentric ring; its structure is shown in the attached diagram. Figure 1 As shown.

[0071] A modular installation method for a ring-type crane bearing beam and a ring rail includes the following steps:

[0072] Step 1: Setting up support fixtures

[0073] Step 1.1: Select a site for assembling the ring bearing beam. The size of the site and the flatness and strength of the ground should meet the requirements for assembling the ring bearing beam. The selected site must be within the lifting range of the crane used to position the ring bearing beam.

[0074] Step 1.2: The assembly of the ring bearing beam and the ring track ground needs to be completed by temporary concrete supports 200. The concrete supports 200 are mainly composed of concrete piers 301, embedded steel plates 300, adjusting screws 302, etc. The number of concrete supports 200 is determined according to the number of segments of the ring bearing beam, and at least 2 concrete supports 200 are arranged under each segment of the ring bearing beam.

[0075] Step 1.3: Using a total station or other surveying tools, mark the position (angular and radial) of each concrete support 200 mm. Set up the concrete supports 200 mm according to the marked positions. Figure 2 As shown, the detailed structure of the support is as follows: Figures 3a-3c As shown, the support is made of C30 concrete.

[0076] The concrete support 200 includes a pre-embedded steel plate 300 set at the top and a concrete pier 301 set below the pre-embedded steel plate 300. Adjusting screws 302 are set under the pre-embedded steel plate 300, and there are 3 adjusting screws 302 under each pre-embedded steel plate 300.

[0077] Step 1.4: When setting up the concrete support 200, it is necessary to ensure that the upper surface of the concrete support 200 is at the same elevation, and the elevation deviation is controlled within ±10mm.

[0078] Step 2: Assemble the ring bearing beam and the ring track on the ground.

[0079] Step 2.1: Clean the anti-rust oil and other impurities and foreign objects at the end face of the ring bearing beam connection with cleaning agent and white cloth, and check the end face joint to ensure that there are no impurities, foreign objects or defects.

[0080] Step 2.2: Refer to the pre-assembly sequence of the ring bearing beams from the manufacturer and use a truck crane to lift each section of the ring bearing beams onto the concrete supports. Ensure that the elongated holes at the bottom of each ring bearing beam are easy to measure. The supports should not be placed directly below the bolt holes, and the ring bearing beams should be in full contact with the concrete supports without tilting or instability. If these conditions are not met, adjustments can be made using shims.

[0081] Step 2.3: As Figure 4 The position of the rail support beam 400 is adjusted using adjusting screw 401 to ensure that the rail support beam 400 is aligned with the circumference line and that the ellipticity of the rail support beam 400 meets the requirements.

[0082] Step 2.4: After the position of the ring bearing beam is adjusted, connect each section of the ring bearing beam with connecting bolts and pre-tighten them.

[0083] Step 2.5: Mark the center line of the ring rail pad (groove pad and combination pad) and the installation position of the ring rail adjusting bolt fixing plate on the upper surface of the ring bearing beam.

[0084] Step 2.6: Grind the surface to be welded on the top surface of the ring bearing beam, and weld the ring rail adjusting bolt fixing plate and the positioning groove pad, and fix them with adjusting bolts.

[0085] Step 2.7: Use a truck crane to assemble the track in the marked or planned order, hoisting each section of track onto the ring bearing beam so that the center of the track is aligned with the center of the ring bearing beam.

[0086] Step 2.8: As Figure 5 As shown, the ring rail is adjusted by adding combination 504 pads (no more than 2 pads per group) and adjusting bolts to ensure that the ring rail radius deviation, height difference, ellipticity, height difference at the joint, horizontal misalignment, and gap meet the design requirements.

[0087] The combined pad 504 includes a grooved block 502, a track 501 is provided in the groove of the grooved block 502, a pressure plate 503 is provided on the grooved block 502, the space formed by the grooved block 502 and the pressure plate 503 limits the track 501, a wedge block 507 is provided between the track 501 and the grooved block 502, and the pressure plate 503 is fixedly connected to the grooved block 502 by bolts 505 and washers 506. A limiting component composed of a steel plate 508, bolts 509 and nuts 510 is provided on the side of the combined pad 504.

[0088] Step 2.9: After the assembly parameters of the track meet the design requirements, weld and fix the groove blocks (including the combination pads) under the track, and the weld height meets the requirements of the drawing; fully weld the track adjusting bolt fixing plate to the ring bearing beam, and tighten the track pressure plate bolts. The tightening torque value meets the design requirements. Tightening is done in two stages, the first time at 50% and the second time at 100%.

[0089] Step 2.10: Mark the contact points between the lower cover plate of the ring bearing beam and the corbel to ensure that the subsequent ring bearing beams are assembled with the corbels in the same order and position as the ground assembly.

[0090] Step 2.11: Check that the keys and pins at each ring bearing beam connection can be installed normally. If the dimensions are not met, the keys and pins can be properly processed before installing the keys and pins at the ring bearing beam connection.

[0091] Step 3: Measurement and Data Collection

[0092] Step 3.1: After the ring bearing beam and ring rail are assembled on the ground, measure the corresponding coordinate data of the inner and outer bolt holes of each ring bearing beam relative to the center of the ring bearing beam, and number the bolt holes.

[0093] Step 3.2: After measuring the bolt hole locations, use a total station or steel tape measure to measure the vertical distance between the ring bearing beam and each corbel connection point, and between the upper and lower cover plates of the ring bearing beam (Note: all measurement locations are at the pad installation points). Take 5 sets of data at each location. The specific measurement locations for the 5 sets of data are the 4 apex corners of the pad and the center position of the pad. Number the data for each location to prevent data confusion.

[0094] Step 3.3: During the measurement process, the influence of the external environment, especially the influence of temperature, should be considered. Measurements should be taken multiple times over different time periods, and the average value should be taken.

[0095] Step 4: Measuring and laying out the guide lines and drilling holes.

[0096] Step 4.1: Mark the radial center line and angular center line on the bracket, and make a preliminary judgment on whether the bracket position is qualified or meets the installation requirements of the ring lifting ring bearing beam based on the radial and angular center lines.

[0097] Step 4.2: Measure and check the elevation of the brackets. Measure the elevation at 5 points for each bracket. In advance, draw the edge line of the ring bearing beam pad according to the radial center line and angular center line of the bracket, and mark the elevation measurement points of the brackets (the four apex positions and the center position of the pad). At the same time, check the flatness of the upper surface of the brackets. For brackets with large flatness deviations, grind them.

[0098] Step 4.3: In order to reduce the influence of ambient temperature on the measurement and layout deviation, the bolt hole position layout time and the bolt hole data acquisition time are in the same time period, and the temperature difference is controlled within 2℃.

[0099] Step 4.4: Transfer the bolt hole positions measured on the ground to the bracket and mark them with lines; drill holes in the bracket using a magnetic drill according to the final position of the marked bolt hole center.

[0100] Step 5: Adjusting the initial processing of the pad

[0101] Step 5.1: Calculate the thickness of the pad based on the elevation measurement data of the corbel and the height data between the upper and lower cover plates of the ring bearing beam at the installation position of the pad.

[0102] Step 5.2: Based on the calculated data, perform initial processing on the pad, leaving a 6mm processing allowance for the initial processing of the pad.

[0103] Step 5.3: Before processing the pads, each pad must be numbered and labeled to ensure that the pads are processed according to the measured and calculated data.

[0104] Step Six: Integral hoisting and installation of the ring bearing beam and ring rail

[0105] Step 6.1: Before hoisting, check that all connecting bolts and gaskets of the ring bearing beam and ring rail are securely tightened to prevent bolts from loosening and foreign objects from falling during hoisting.

[0106] Step 6.2: Use lifting slings 602, shackles 603, and wire ropes 604 to connect the crane hook to the ring bearing beam. Figure 6 As shown.

[0107] Step 6.3: After the ring bearing beam and the ring rail are hoisted into place as a whole, the connecting bolts between the ring bearing beams are retightened to ensure that the connecting bolts have not loosened during the hoisting process and that the tightening torque value meets the design requirements.

[0108] Step 6.4: Follow the appendix Figure 7 As shown, the position of the ring bearing beam is adjusted using jack 702, and the elevation is adjusted using shim 703, so that the deviation of the ring rail radius, top elevation, height difference, ellipticity, height difference at the joint, horizontal misalignment, and gap on the ring bearing beam meet the design requirements. A wooden partition 701 is installed between jack 702 and the bearing beam 400.

[0109] Step 6.5: After confirming that all installation data meet the requirements, tighten the connecting bolts between the ring bearing beam and the corbel.

[0110] Step 6.6: Measure the gap between the lower cover plate of the ring bearing beam and the corbel. Measure 5 points at each corbel position. The measurement points are located at the four right angles and the center point of the ring bearing beam pad.

[0111] Step 7: Adjusting the shim plate for precision machining

[0112] Step 7.1: Calculate the machining data of the pad for each bracket position based on the measured gap data, and perform final machining on the pad according to the data.

[0113] Step 7.2: After the pad is finished, gradually remove the connecting bolts between the ring bearing beam and the bracket. According to the corresponding position of the pad number, install the pad between the ring bearing beam and the bracket until the three holes of the bracket, pad, and ring bearing beam are concentric. Then reconnect the connecting bolts between the ring bearing beam and the bracket and tighten them according to the design torque value.

[0114] Step 8: Overall Acceptance of Ring Bearing Beam and Ring Rail

[0115] Step 8.1: Use a total station to measure the installation technical parameters of the ring rail, such as radius, elevation, ellipticity, height difference, horizontal misalignment, and gap at the joints.

[0116] Step 8.2: After confirming that all the final installation technical parameters meet the design requirements, check the tightening torque of the track pressure plate bolts to ensure that the tightening torque of each bolt meets the design requirements.

Claims

1. A modular installation method for a ring-type crane bearing beam and ring rail, characterized in that, Includes the following steps: Step 1: Setting up the supporting fixtures; Step 2: Assemble the ring bearing beam and the ring track on the ground; Step 3: Measure and collect data; Step 4: Measure and lay out the guide lines and drill holes; Step 5: Adjust the initial processing of the pad; Step Six: Integral hoisting and installation of the ring bearing beam and ring rail; Step 7: Adjust the precision machining of the shim plate; Step 8: Overall acceptance of the ring bearing beam and ring track.

2. The modular installation method for a ring-type crane ring bearing beam and ring rail as described in claim 1, characterized in that, Step one includes the following: Step 1.1: Select a site for assembling the ring bearing beam. The size of the site, the flatness and strength of the ground should meet the assembly requirements of the ring bearing beam, and the selected site should be within the lifting range of the crane used to position the ring bearing beam. Step 1.2: The assembly of the ring bearing beam and the ring track ground requires temporary concrete supports (200). The concrete supports (200) consist of concrete piers (301), embedded steel plates (300), and adjusting screws (302). At least two concrete supports (200) should be arranged under each section of the ring bearing beam. The number of concrete supports (200) is determined according to the number of sections of the ring bearing beam. Step 1.3: Using a total station or other surveying tools, mark the position of each concrete support (200). Set up the concrete supports (200) according to the marked positions, using C30 concrete. The concrete support (200) includes a pre-embedded steel plate (300) at the top and a concrete pier (301) below the pre-embedded steel plate (300). Adjusting screws (302) are provided under each pre-embedded steel plate (300), and there are 3 adjusting screws (302) under each pre-embedded steel plate (300). Step 1.4: When setting up the concrete support (200), it is necessary to ensure that the upper surface of the concrete support (200) is at the same elevation, and the elevation deviation is controlled within ±10mm.

3. The modular installation method for a ring-type crane bearing beam and ring rail as described in claim 2, characterized in that, Step two includes the following: Step 2.1: Clean the rust-preventive oil and other impurities and foreign objects from the connection end face of the ring bearing beam using a cleaning agent and a white cloth. Inspect the end face joint until no impurities, foreign objects, or defects are visible to the naked eye. Step 2.2: Use a truck crane to lift each section of the ring bearing beam onto the concrete support. Ensure that the elongated holes at the bottom of each ring bearing beam are easily measurable. The support should not be placed directly below the bolt holes, and the ring bearing beam should be in complete contact with the concrete support without tilting or instability. If these requirements are not met, adjustments can be made using shims. Step 2.3: Adjust the position of the rail support beam (400) using the adjusting screw (401) to ensure that the rail support beam (400) is aligned with the circumference line and that the ellipticity of the rail support beam (400) meets the requirements. Step 2.4: After the position of the ring bearing beam is adjusted, connect each section of the ring bearing beam with connecting bolts and pre-tighten them. Step 2.5: Mark the center line of the ring rail pad and the installation position of the ring rail adjusting bolt fixing plate on the upper surface of the ring bearing beam. The ring rail pad includes a grooved pad and a combined pad. Step 2.6: Grind the surface to be welded on the top of the ring bearing beam, weld the ring rail adjusting bolt fixing plate and the positioning groove shim plate, and fix them with the adjusting bolts. Step 2.7: Using a truck crane, assemble the rails according to the marked or planned sequence, hoisting each rail section onto the ring bearing beam, aligning the center of the rail with the center of the ring bearing beam. Step 2.8: Adjust the ring rail by adding combination shims (504) and adjusting bolts to ensure that the ring rail radius deviation, height difference, ellipticity, height difference at the joint, horizontal misalignment, and clearance meet the design requirements. The combined pad (504) includes a grooved block (502), a track (501) is provided in the groove of the grooved block (502), a pressure plate (503) is provided on the grooved block (502), the space formed by the grooved block (502) and the pressure plate (503) limits the track (501), a wedge block (507) is provided between the track (501) and the grooved block (502), and the pressure plate (503) is fixedly connected to the grooved block (502) by bolts (505) and washers (506). The side of the combined pad (504) is provided with a limiting assembly composed of a steel plate (508), bolts (509) and nuts (510). Step 2.9: After all assembly parameters of the track meet the design requirements, weld and fix the groove blocks and combination pads under the track, ensuring the weld height meets the drawing requirements; fully weld the track adjusting bolt fixing plate to the ring bearing beam, and tighten the track pressure plate bolts, ensuring the tightening torque meets the design requirements. Tighten in two stages: 50% for the first time and 100% for the second. Step 2.10: Mark the contact points between the lower cover plate of the ring bearing beam and the corbel to ensure that subsequent ring bearing beams are assembled with the corbels in the exact same order and position as on the ground. Step 2.11: Check that the keys and pins at each ring bearing beam connection can be installed normally. If the dimensions are not met, process the keys and pins appropriately before installing the keys and pins at the ring bearing beam connection.

4. The modular installation method for a ring-type crane ring bearing beam and ring rail as described in claim 3, characterized in that, Step three includes the following: Step 3.1: After the ring bearing beam and ring rail are assembled on the ground, measure the corresponding coordinate data of the inner and outer bolt holes of each ring bearing beam relative to the center of the ring bearing beam, and number the bolt holes. Step 3.2: After measuring the bolt hole locations, use a total station or steel tape measure to measure the vertical distance between the ring bearing beam and each corbel connection point, and between the upper and lower cover plates of the ring bearing beam. Measure 5 sets of data at each location. The specific measurement locations for the 5 sets of data are the four corners of the pad and the center of the pad. Number the data at each location to prevent data confusion. Step 3.3: During the measurement process, the influence of the external environment, especially the influence of temperature, should be considered. Measurements should be taken multiple times over different time periods, and the average value should be taken.

5. The modular installation method for a ring-type crane bearing beam and ring rail as described in claim 4, characterized in that, Step four includes the following: Step 4.1: Mark the radial and angular center lines on the bracket, and preliminarily determine whether the bracket position is qualified or meets the installation requirements of the ring lifting ring bearing beam based on the radial and angular center lines. Step 4.2: Measure and check the elevation of the brackets. Measure the elevation at 5 points for each bracket. Beforehand, mark the edge lines of the ring bearing beam pad based on the radial and angular center lines of the bracket. Mark the elevation measurement points for the brackets at the four corners and the center of the pad. Simultaneously, check the flatness of the upper surface of the brackets. Grind any brackets with significant flatness deviations. Step 4.3: To reduce the impact of ambient temperature on measurement and layout deviation, the bolt hole position layout time and bolt hole data acquisition time are within the same time period, and the temperature difference is controlled within 2℃. Step 4.4: Transfer the bolt hole positions measured on the ground to the bracket and mark them with lines; drill holes in the bracket using a magnetic drill according to the final position of the marked bolt hole center.

6. The modular installation method for a ring-type crane ring bearing beam and ring rail as described in claim 5, characterized in that, Step five includes the following: Step 5.1: Based on the measured elevation data of the corbel and the height data between the upper and lower cover plates of the ring bearing beam at the installation position of the pad, calculate the thickness data of the pad. Step 5.2: Based on the calculated data, perform initial machining on the pad, leaving a 6mm machining allowance for the initial machining. Step 5.3: Before processing the pads, number and label each pad to ensure that the pads are processed according to the measured and calculated data.

7. The modular installation method for a ring-type crane bearing beam and ring rail as described in claim 6, characterized in that, Step six includes the following: Step 6.1: Before hoisting, check that all connecting bolts and washers of the ring bearing beam and ring rail are securely tightened to prevent loose bolts and falling foreign objects during hoisting. Step 6.2: Use lifting slings (602), shackles (603), and wire ropes (604) to connect the crane hook to the ring bearing beam. Step 6.3: After the ring bearing beam and ring rail are hoisted into place as a whole, the connecting bolts between the ring bearing beams are retightened to ensure that the connecting bolts did not loosen during the hoisting process and that the tightening torque meets the design requirements. Step 6.4: Use jacks (702) to adjust the position of the ring bearing beam and use shims (703) to adjust the elevation so that the deviation of the ring rail radius, top elevation, height difference, ellipticity, height difference at the joint, horizontal misalignment, and gap on the ring bearing beam meet the design requirements. A wooden partition (701) is installed between the jacks (702) and the bearing beam (400). Step 6.5: After confirming that all installation data meet the requirements, tighten the connecting bolts between the ring bearing beam and the corbel. Step 6.6: Measure the gap between the lower cover plate of the ring bearing beam and the corbel. Measure 5 points at each corbel position. The measurement points are located at the four right angles and the center point of the ring bearing beam pad.

8. The modular installation method for a ring-type crane bearing beam and ring rail as described in claim 7, characterized in that, Step seven includes the following: Step 7.1: Based on the measured gap data, calculate the machining data for the pad at each bracket position, and perform final machining on the pad according to the data. Step 7.2: After the pad is finished, gradually remove the connecting bolts between the ring bearing beam and the bracket. According to the corresponding position of the pad number, install the pad between the ring bearing beam and the bracket until the three holes of the bracket, pad, and ring bearing beam are concentric. Then reconnect the connecting bolts between the ring bearing beam and the bracket and tighten them according to the design torque value.

9. A modular installation method for a ring-type crane bearing beam and ring rail as described in claim 8, characterized in that, Step eight includes the following: Step 8.1: Use a total station to measure the radius, elevation, ellipticity, height difference, horizontal misalignment, and gap installation parameters of the ring rail. Step 8.2: After confirming that all the final installation technical parameters meet the design requirements, check the tightening torque of the track pressure plate bolts to ensure that the tightening torque of each bolt meets the design requirements.

Images