A method for fixing a heavy-duty lifting frame body of a coiling and conveying chain

Abstract

The application discloses a winding and conveying chain heavy load lifting frame body fixing method and belongs to the technical field of steel metallurgy heavy load equipment installation and fixing, and comprises the following steps: step S1, base pretreatment; step S2, fixed bottom plate positioning and installation; step S3, limiting vertical plate assembly; step S4, winding and conveying chain heavy load lifting frame body butt joint; step S5, connecting pull rod fastening; step S6, multi-point constraint reinforcement; and step S7, debugging and checking. The application has the advantages of standard process, reliable fixing, anti-vibration and anti-fatigue, convenient installation and maintenance and strong adaptability, and can meet the requirements of efficient, stable and safe operation of a hot rolling production line.

Description

Technical Field

[0001] This invention belongs to the field of installation and fixing technology of heavy-duty equipment in iron and steel metallurgy, and specifically relates to a method for fixing a heavy-duty lifting frame of a coiled transport chain. Background Technology

[0002] In hot-rolled strip steel production lines, the heavy-duty lifting frame of the coiling conveyor chain is the core heavy-duty equipment for realizing the transfer and lifting of steel coils. Its fixing effect directly determines the operating efficiency, operational safety and service life of the production line. Existing fixing methods for the heavy-duty lifting frame of the coiling conveyor chain generally have some technical defects. For example, irregular installation procedures and a lack of pre-processing and verification steps can lead to excessive deviations in the levelness of the fixed base plate and insecure anchor bolts, making the frame prone to displacement later. A single fixing method, often using single-bolt connections, lacks mechanical limits and double anti-loosening designs, making bolts prone to loosening and frame shifting under heavy-load conditions of frequent impacts and vibrations, affecting the reliability of the fixing. The absence of vibration buffering and stress compensation can cause stress concentration at connection points under long-term alternating loads, leading to fatigue failures such as bolt breakage, base plate deformation, and weld cracking, resulting in poor fatigue resistance. Poor installation adaptability, lack of position adjustment and deviation compensation measures, makes it difficult to adapt to different specifications of heavy-duty lifting frames and foundation construction deviations, and makes disassembly and maintenance cumbersome, with time-consuming troubleshooting and component replacement, reducing the effective operating rate of the equipment. The lack of a complete debugging, verification, and regular maintenance process makes it impossible to detect potential faults in the fixing devices in a timely manner, easily leading to equipment safety accidents.

[0003] Therefore, there is an urgent need for a method for fixing the heavy-duty lifting frame of the winding transport chain that is standardized, reliable, vibration-resistant, fatigue-resistant, easy to install and maintain, and highly adaptable. Summary of the Invention

[0004] The purpose of this invention is to provide a method for fixing a heavy-duty lifting frame of a coiling transport chain. The method is standardized, reliable, vibration-resistant, fatigue-resistant, easy to install and maintain, and highly adaptable, which can meet the needs of efficient, stable, and safe operation of hot rolling production lines.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for securing a heavy-duty lifting frame of a winding transport chain includes the following steps: Step S1: Foundation pretreatment: Clean the surface of the concrete foundation of impurities and protrusions. Drill holes in the concrete foundation according to the design dimensions and install anchor bolts. Then, use grout to fix it. After the grout has solidified, lay rubber shock-absorbing pads on the surface of the concrete foundation to ensure that the shock-absorbing pads are flat, fit well and have no deviation. Step S2: Fixing and installing the base plate: Connect the high-strength base plate to the concrete foundation with anchor bolts. After adjusting the horizontal position and angle of the base plate using the strip adjustment holes on the base plate, use a level to check the levelness of the base plate. Once the levelness is met, pre-tighten the anchor bolts. Step S3: Assembly of the limiting plate: Vertically weld the limiting plate to the fixed base plate. After welding, perform flaw detection on the weld to ensure welding quality. On the side wall of the limiting plate near the heavy-duty lifting frame of the winding conveyor chain, open a U-shaped slot and embed a high-chromium wear-resistant liner plate on its inner wall by bolting or bonding. At the same time, weld a reinforcing rib plate on the side wall of the limiting plate below the U-shaped slot to improve the bending stiffness and impact resistance of the limiting plate. Step S4: Connecting the heavy-duty lifting frame of the winding conveyor chain: Open a through-hole tie rod mounting hole in the U-shaped slot of the limiting plate, insert the connecting end of the heavy-duty lifting frame of the winding conveyor chain into the U-shaped slot of the limiting plate, adjust the position of the frame so that the connecting hole of the frame connecting end is aligned with the tie rod mounting hole in the U-shaped slot of the limiting plate, and ensure that the connecting end of the heavy-duty lifting frame of the winding conveyor chain is tightly fitted with the high-chromium wear-resistant liner. Step S5: Fastening the connecting rod: Pass one end of the connecting rod, made of tempered alloy steel, through the rod mounting hole in the U-shaped slot of the limiting plate and hinge it to the connecting hole at the connection end of the heavy-duty lifting frame of the winding conveyor chain. Install a spherical washer between the connecting rod and the limiting plate to compensate for installation deviation. Install a disc spring washer, a nylon anti-loosening washer, and a high-strength nut on the other end of the connecting rod in sequence, and tighten it evenly with a torque wrench to a preset torque to achieve double anti-loosening. Step S6: Multi-point constraint reinforcement: Repeat steps S3-S5, and symmetrically set at least two sets of limiting uprights and connecting rods on the fixed base plate to form a multi-point constraint structure to improve the stability and anti-overturning ability of the heavy-duty lifting frame. Step S7: Debugging and verification: Run the unloaded conveyor chain to lift the heavy-duty frame, check for looseness, displacement and abnormal vibration in each connection part, test the frame's running accuracy, and put it into production after it meets the standards; during the production process, regularly check and maintain the pre-tightening force of the fastening components, the condition of the shock-absorbing pads and the quality of the welds, and replace damaged parts in a timely manner.

[0006] A further improvement of the technical solution of the present invention is that: in step S1, the thickness of the rubber shock-absorbing pad is 10-20mm, the Shore hardness is 60-70 Shore A, and the grouting material setting time is ≥24h.

[0007] A further improvement to the technical solution of the present invention is that, in step S2, the connection of the high-strength fixed base plate to the concrete foundation by anchor bolts includes the following steps: opening strip-shaped adjustment holes for installing anchor bolts on the fixed base plate, placing the fixed base plate on the rubber shock-absorbing pad of the concrete foundation, aligning the strip-shaped adjustment holes on the fixed base plate with the anchor bolts on the concrete foundation, and fitting the nuts and washers of the anchor bolts.

[0008] A further improvement of the technical solution of the present invention is that: in step S2, the fixed base plate is made of Q355B or Q460D high-strength steel plate, the levelness deviation is ≤0.5mm / m, and the pre-tightening torque of the anchor bolts is 800-1200N·m.

[0009] A further improvement of the technical solution of the present invention is that: in step S3, the thickness of the high-chromium wear-resistant liner is 8-12mm, and the weld flaw detection adopts ultrasonic detection, and the detection standard conforms to GB / T 11345-2013.

[0010] A further improvement of the technical solution of the present invention is that: in step S5, the connecting rod is made of 42CrMo quenched and tempered alloy steel, the preset tightening torque is 600-900 N·m, and a torque wrench is used to re-inspect after tightening to ensure that the pre-tightening force is uniform.

[0011] A further improvement of the technical solution of the present invention is that: in step S7, the periodic inspection and maintenance cycle is 15-30 days, and the inspection and maintenance content includes the loosening of fastening components, the wear and deformation of shock-absorbing pads, the wear of wear-resistant liners, and whether there are cracks in the welds.

[0012] The technological advancements achieved by this invention due to the adoption of the above technical solutions are as follows: The present invention provides a method for fixing a heavy-duty lifting frame of a winding transport chain. The process is standardized, the fixing is reliable, it is resistant to vibration and fatigue, and it is easy to install and maintain. It is also highly adaptable and can meet the needs of efficient, stable and safe operation of hot rolling production lines.

[0013] This invention employs a constraint method that combines U-shaped slot mechanical limiting with connecting rod hinge fastening, and forms a double anti-loosening structure with disc spring washers and nylon anti-loosening washers. This effectively suppresses lateral displacement of the frame and loosening of nuts under heavy load impact and continuous vibration conditions, resulting in high overall fixing strength and good stability, and significantly reducing the probability of equipment malfunction.

[0014] The present invention features a reinforcing rib plate below the U-shaped slot, which significantly improves the bending stiffness and impact resistance of the limiting plate, preventing the plate from bending and deforming under heavy loads; the rubber shock-absorbing pad can absorb the vibration of the equipment operation and reduce the transmission of alternating stress to the foundation; the spherical washer can compensate for the installation angle deviation and prevent the connecting rod from generating additional bending stress, thereby effectively reducing fatigue damage to key components and extending the overall service life.

[0015] The fixed base plate of this invention adopts a strip-shaped adjustment hole design, which can flexibly adjust the horizontal position and angle during installation to ensure the docking accuracy of the frame; the U-shaped slot fits and positions with the high-chromium wear-resistant liner, and with the hinged tie rod structure, it can not only ensure reliable limiting, but also adapt to slight displacement of the frame, with high tolerance for installation errors, and adapt to the fixing requirements of heavy-duty lifting frames of different specifications of winding transport chains.

[0016] This invention embeds a high-chromium wear-resistant liner plate into the inner wall of the U-shaped slot, transforming the hard contact between the frame and the limiting plate into a low-wear contact with the wear-resistant liner plate. This significantly reduces component wear caused by relative sliding and impact, reduces the frequency of later maintenance and replacement, and improves the overall durability of the device. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to embodiments: This invention provides a method for fixing a heavy-duty lifting frame of a winding transport chain, comprising the following steps: Step S1: Foundation Pretreatment: First, clean the concrete foundation surface of impurities and protrusions to ensure a flat and clean surface, avoiding affecting the fit of subsequent components. Then, drill anchor bolt installation holes in the concrete foundation according to the dimensions and positions specified in the design drawings. After installing the anchor bolts, use grout to fix them, ensuring a firm connection between the anchor bolts and the foundation. After the grout has solidified, lay rubber shock-absorbing pads on the concrete foundation surface. When laying, ensure that the shock-absorbing pads are flat, fit snugly, and without deviation. They are used to absorb the impact vibration generated by the operation of subsequent equipment and reduce the transmission of alternating stress. Specifically, the thickness of the rubber shock-absorbing pads is 10-20mm, the Shore A hardness is 60-70, and the grout solidification time is ≥24h. Step S2: Fixed Base Plate Positioning and Installation: Connect the high-strength fixed base plate to the concrete foundation using anchor bolts. The specific steps are as follows: Make strip-shaped adjustment holes on the fixed base plate for installing the anchor bolts. Place the fixed base plate on the rubber shock-absorbing pads of the concrete foundation, aligning the strip-shaped adjustment holes on the fixed base plate with the anchor bolts on the concrete foundation, and then install the nuts and washers on the anchor bolts. After adjusting the horizontal position and angle of the fixed base plate using the strip-shaped adjustment holes, use a level to check the levelness of the fixed base plate. Once the levelness is met, pre-tighten the anchor bolts to complete the positioning and installation of the fixed base plate. Specifically, the fixed base plate uses Q355B or Q460D high-strength steel plate, with a levelness deviation ≤0.5mm / m, and the anchor bolt pre-tightening torque is 800-1200N•m. Step S3: Assembly of the limiting plate: Vertically weld the limiting plate to the fixed base plate. During welding, control the welding current and welding speed to ensure a full weld, free of slag inclusions and porosity. After welding, perform flaw detection on the weld to check for welding defects and ensure welding quality. A U-shaped groove is made on the side wall of the limiting plate near the heavy-duty lifting frame of the coiling conveyor chain. A high-chromium wear-resistant liner is embedded in the inner wall of this U-shaped groove using bolts or adhesive, ensuring a tight fit between the liner and the inner wall of the groove to reduce subsequent wear between the frame and the limiting plate. Simultaneously, a reinforcing rib is welded to the side wall of the limiting plate below the U-shaped groove. The reinforcing rib is fully welded to both the limiting plate and the fixed base plate to improve the bending stiffness and impact resistance of the limiting plate, preventing deformation under heavy load conditions. Specifically, the thickness of the high-chromium wear-resistant liner is 8-12mm. Ultrasonic testing is used for weld flaw detection, conforming to GB / T standards. 11345-2013; Step S4: Connecting the heavy-duty lifting frame of the winding conveyor chain: Open a through-hole tie rod mounting hole in the U-shaped slot of the limiting plate, slowly insert the connecting end of the heavy-duty lifting frame of the winding conveyor chain into the U-shaped slot of the limiting plate, adjust the height and horizontal position of the frame, so that the connecting hole of the connecting end of the frame is aligned with the tie rod mounting hole in the U-shaped slot of the limiting plate, and ensure that the connecting end of the heavy-duty lifting frame of the winding conveyor chain is tightly fitted with the high-chromium wear-resistant liner without gaps, so as to achieve the initial mechanical limiting of the frame and prevent the frame from lateral displacement. Step S5: Fastening the connecting rod: Hinge one end of the connecting rod, made of tempered alloy steel, through the rod mounting hole in the U-shaped slot of the limiting plate and the connecting hole at the end of the heavy-duty lifting frame of the winding conveyor chain. This ensures the connecting rod can accommodate slight displacement of the frame, avoiding additional stress from the rigid connection. Install a spherical washer between the connecting rod and the limiting plate. Utilize the rotatable nature of the spherical washer to compensate for angular deviations during installation, preventing additional bending stress on the rod. Tighten the other end of the connecting rod sequentially... The set includes a disc spring washer, a nylon anti-loosening washer, and a high-strength nut, which are then tightened evenly to the preset torque using a torque wrench. The disc spring washer provides continuous preload, while the nylon anti-loosening washer prevents loosening through its engagement with the thread. Together, they form a double anti-loosening structure, effectively preventing the nut from loosening under vibration conditions. Specifically, the connecting rod is made of 42CrMo quenched and tempered alloy steel, with a preset tightening torque of 600-900 N•m. After tightening, a torque wrench is used for re-inspection to ensure uniform preload. Step S6: Multi-point constraint reinforcement: Repeat steps S3-S5, and symmetrically set at least two sets of limiting uprights and connecting rods on the fixed base plate to form a multi-point constraint structure, which limits and tightens the frame from different directions, disperses the load borne by the frame, avoids local stress concentration, and improves the stability and anti-overturning ability of the heavy-load lifting frame. Step S7: Debugging and Verification: Run the unloaded conveyor chain under heavy load to check for looseness, displacement, and abnormal vibration at each connection point. Test the frame's running accuracy to ensure smooth and unbiased operation. Once the frame meets the standards, it can be put into production. During production, regularly inspect and maintain the pre-tightening force of fastening components, the condition of shock-absorbing pads, and the quality of welds, and replace damaged parts in a timely manner. Specifically, the regular inspection and maintenance cycle is 15-30 days. The inspection and maintenance content includes checking the looseness of fastening components, the wear and deformation of shock-absorbing pads, the wear of wear-resistant liners, and whether there are cracks in the welds. If any damaged or abnormal parts are found, they should be maintained or replaced in a timely manner to ensure the long-term stable operation of the fixing device.

[0018] The following is an illustration through specific examples: Example 1

[0019] The method for fixing the heavy-duty lifting frame of the coiling conveyor chain in this embodiment is applicable to fixing the heavy-duty lifting frame (rated load 50t) of the coiling conveyor chain in a hot-rolled strip steel production line. The specific steps are as follows: Step S1: Foundation Pretreatment: Clean impurities and protrusions from the concrete foundation surface, drill four 50mm diameter anchor bolt holes according to the design dimensions, install M48 anchor bolts, and use C40 grout to pour and fix them, allowing them to stand for 24 hours to ensure that the grout has completely solidified; lay a 15mm thick rubber shock-absorbing pad with a Shore A hardness of 65 on the foundation surface to ensure a flat and non-misaligned fit; Step S2: Fixed base plate positioning and installation: Select a fixed base plate with dimensions of 1200mm×800mm×20mm made of Q355B high-strength steel plate. Place the base plate on the rubber shock-absorbing pads, align it with the anchor bolts, and adjust the position of the base plate using the elongated oval adjustment holes on the fixed base plate. Use a level to check and ensure that the level deviation is no more than 0.5mm / m; pre-tighten the anchor bolts to a pre-tightening torque of 1000N·m. Step S3: Assembly of the limiting plate: Vertically weld the 800mm×400mm×16mm limiting plate to the preset position on the fixed base plate. The welding current is controlled at 200-250A, and the welding speed is 10-15cm / min. After welding, the weld is inspected by ultrasonic testing and meets the GB / T 11345-2013 standard. A 10mm thick high-chromium wear-resistant liner is inlaid on the inner wall of the U-shaped slot and fixed with bolts. Two 400mm×200mm×12mm reinforcing ribs are welded to the side wall of the limiting plate and fully welded together. Step S4: Heavy-duty lifting frame docking: Insert the connecting end of the heavy-duty lifting frame into the U-shaped slot of the limiting plate, adjust the position of the frame so that the connecting hole of the frame is aligned with the tie rod mounting hole of the limiting plate, and ensure that the frame and the wear-resistant liner are tightly fitted without gaps. Step S5: Fastening the connecting rod: A connecting rod with a diameter of 40mm and a length of 1000mm is made of 42CrMo quenched and tempered alloy steel. One end passes through the limiting plate and is hinged to the frame connection hole. A spherical washer is installed between the connecting rod and the limiting plate. The other end is fitted with a disc spring washer, a nylon anti-loosening washer and an M48 high-strength nut in sequence. Tighten with a torque wrench to a torque of 750 N·m. Check the pre-tightening force after tightening. Step S6: Multi-point constraint reinforcement: Repeat steps S3-S5, and symmetrically install two sets of limiting plates and connecting rods on the fixed base plate to form a two-point symmetrical constraint structure; Step S7: Debugging, verification and maintenance: Run the frame under no-load and observe that there is no looseness or abnormal vibration in each connection part. After the frame's operating accuracy is tested and found to be up to standard, it is put into use. Check it regularly every 20 days and maintain or replace damaged parts in a timely manner.

[0020] After adopting the fixing method of this embodiment, the heavy-duty lifting frame operates stably without displacement or loosening. Its fatigue life is increased by more than 30% compared with the traditional method, and the maintenance time is shortened by 40%, effectively ensuring the efficient operation of the production line. Example 2

[0021] The method for fixing the heavy-duty lifting frame of the coiling conveyor chain in this embodiment is applicable to fixing the heavy-duty lifting frame (rated load 80t) of the coiling conveyor chain in a large hot rolling production line. The specific steps are as follows: Step S1: Foundation pretreatment: Clean the concrete foundation surface, drill 6 anchor bolt installation holes, install M64 anchor bolts, use C50 grout to pour and fix, and let stand for 36 hours; lay 20mm thick rubber shock-absorbing pads with a Shore A hardness of 70 to ensure flatness; Step S2: Fixed base plate positioning and installation: Select a fixed base plate with dimensions of 1500mm×1000mm×25mmd made of Q460D high-strength steel plate. After adjusting the position, pre-tighten the anchor bolts with a pre-tightening torque of 1200N·m, and control the level deviation within 0.4mm / m. Step S3: Assembly of the limiting plate: The limiting plate measures 1000mm×500mm×20mm and is subjected to ultrasonic testing after welding; a 12mm thick high-chromium wear-resistant liner is inlaid in the U-shaped slot, and three reinforcing ribs are welded to the side wall of the limiting plate to improve its bending resistance. Step S4: Heavy-duty lifting frame docking: Insert the connecting end of the frame into the U-shaped slot, accurately align the tie rod mounting holes, and ensure a tight fit; Step S5: Fastening the connecting rod: The connecting rod is made of 42CrMo quenched and tempered alloy steel, with a diameter of 50mm and a length of 1200mm. It is fastened to a torque of 900N·m. The double anti-loosening components ensure reliable connection. Step S6: Multi-point constraint reinforcement: Repeat steps S3-S5, symmetrically install 3 sets of limiting uprights and connecting rods to form a three-point constraint structure and improve the anti-overturning ability; Step S7: Debugging, verification and maintenance: After the no-load debugging meets the standards, the device is put into use. Regular inspections are conducted every 15 days to ensure stable operation of the device.

[0022] The fixing method in this embodiment can effectively withstand 80t heavy loads and impact vibrations, has high fixing reliability, excellent fatigue resistance, and is suitable for long-term operation under heavy load conditions.

[0023] The fixing method of this invention has a standardized process and is highly operable. Through optimized step design and structural coordination, it effectively solves many defects of existing fixing methods, providing a stable, durable and easy-to-maintain fixing solution for heavy-duty lifting frames of coiling conveyor chains. It can be widely used for fixing heavy-duty lifting equipment in various hot-rolled strip steel production lines.

[0024] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A method for fixing a heavy-duty lifting frame of a winding conveyor chain, characterized in that... Includes the following steps: Step S1: Foundation pretreatment: Clean the surface of the concrete foundation of impurities and protrusions. Drill holes in the concrete foundation according to the design dimensions and install anchor bolts. Then, use grout to fix it. After the grout has solidified, lay rubber shock-absorbing pads on the surface of the concrete foundation to ensure that the shock-absorbing pads are flat, fit well and have no deviation. Step S2: Fixing and installing the base plate: Connect the high-strength base plate to the concrete foundation with anchor bolts. After adjusting the horizontal position and angle of the base plate using the strip adjustment holes on the base plate, use a level to check the levelness of the base plate. Once the levelness is met, pre-tighten the anchor bolts. Step S3: Assembly of the limiting plate: Vertically weld the limiting plate to the fixed base plate. After welding, perform flaw detection on the weld to ensure welding quality. On the side wall of the limiting plate near the heavy-duty lifting frame of the winding conveyor chain, open a U-shaped slot and embed a high-chromium wear-resistant liner plate on its inner wall by bolting or bonding. At the same time, weld a reinforcing rib plate on the side wall of the limiting plate below the U-shaped slot to improve the bending stiffness and impact resistance of the limiting plate. Step S4: Connecting the heavy-duty lifting frame of the winding conveyor chain: Open a through-hole tie rod mounting hole in the U-shaped slot of the limiting plate, insert the connecting end of the heavy-duty lifting frame of the winding conveyor chain into the U-shaped slot of the limiting plate, adjust the position of the frame so that the connecting hole of the frame connecting end is aligned with the tie rod mounting hole in the U-shaped slot of the limiting plate, and ensure that the connecting end of the heavy-duty lifting frame of the winding conveyor chain is tightly fitted with the high-chromium wear-resistant liner. Step S5: Fastening the connecting rod: Pass one end of the connecting rod, made of tempered alloy steel, through the rod mounting hole in the U-shaped slot of the limiting plate and hinge it to the connecting hole at the connection end of the heavy-duty lifting frame of the winding conveyor chain. Install a spherical washer between the connecting rod and the limiting plate to compensate for installation deviation. Install a disc spring washer, a nylon anti-loosening washer, and a high-strength nut on the other end of the connecting rod in sequence, and tighten it evenly with a torque wrench to a preset torque to achieve double anti-loosening. Step S6: Multi-point constraint reinforcement: Repeat steps S3-S5, and symmetrically set at least two sets of limiting uprights and connecting rods on the fixed base plate to form a multi-point constraint structure to improve the stability and anti-overturning ability of the heavy-duty lifting frame. Step S7: Debugging and verification: Run the conveyor chain under no-load conditions and lift the frame under heavy load. Check for looseness, displacement and abnormal vibration at each connection point. Test the frame's running accuracy. Once it meets the standards, it can be put into production. During the production process, the preload of fastening components, the condition of shock-absorbing pads, and the quality of welds are regularly inspected and maintained, and damaged parts are replaced in a timely manner.

2. The method for fixing a heavy-duty lifting frame of a winding transport chain according to claim 1, characterized in that: In step S1, the thickness of the rubber damping pad is 10-20mm, the Shore A hardness is 60-70, and the curing time of the grout is ≥24h.

3. The method for fixing a heavy-duty lifting frame of a winding transport chain according to claim 2, characterized in that: In step S2, connecting the high-strength fixed base plate to the concrete foundation using anchor bolts includes the following steps: opening strip-shaped adjustment holes on the fixed base plate for installing anchor bolts, placing the fixed base plate on the rubber shock-absorbing pads of the concrete foundation, aligning the strip-shaped adjustment holes on the fixed base plate with the anchor bolts on the concrete foundation, and fitting the nuts and washers of the anchor bolts.

4. The method for fixing a heavy-duty lifting frame of a winding transport chain according to claim 3, characterized in that: In step S2, the fixed base plate is made of Q355B or Q460D high-strength steel plate, with a levelness deviation of ≤0.5mm / m and an anchor bolt pre-tightening torque of 800-1200N·m.

5. A method for fixing a heavy-duty lifting frame of a winding transport chain according to claim 4, characterized in that: In step S3, the thickness of the high-chromium wear-resistant liner is 8-12mm, and the weld flaw detection adopts ultrasonic testing, with the testing standard conforming to GB / T 11345-2013.

6. A method for fixing a heavy-duty lifting frame of a winding transport chain according to claim 5, characterized in that: In step S5, the connecting rod is made of 42CrMo quenched and tempered alloy steel, and the preset tightening torque is 600-900 N·m. After tightening, a torque wrench is used for re-inspection to ensure that the pre-tightening force is uniform.

7. A method for fixing a heavy-duty lifting frame of a winding transport chain according to claim 6, characterized in that: In step S7, the periodic inspection and maintenance cycle is 15-30 days. The inspection and maintenance includes checking the looseness of fastening components, the wear and deformation of shock-absorbing pads, the wear of wear-resistant liners, and whether there are cracks in the welds.