An intermediate standard section pair demolition device and its usage method
By designing a removal device for intermediate standard section pairs, the flange is lifted by hydraulic push rods to make the next support column off the ground, thereby achieving a safe and convenient dismantling of the warehouse roof support system, solving the construction difficulties and dangerous problems caused by high-altitude operations during traditional demolition.
Patent Information
- Application Number
- CN202510405416.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2045-04-02
AI Technical Summary
During the removal of the traditional warehouse roof support system, the truss operating platform system needs to be removed first, resulting in construction personnel facing high-altitude operations, causing construction difficulties and dangers.
A removal device for intermediate standard section pairs is designed, including a support box, a lifting drive device and a stabilizing support device. The flange is clamped by the support box, and the flange is lifted by a hydraulic push rod to make the next support column off the ground, thereby achieving safe and convenient disassembly.
Through this device, the support columns are dismantled from the bottom, avoiding high-altitude operations, improving construction safety and efficiency, and solving the problems of construction difficulties and dangers during traditional demolition.
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Figure CN119900392B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of formwork support, and particularly to a device for removing intermediate standard section pairs and a using method thereof. Background Art
[0002] A shallow silo refers to a cylindrical above-ground grain silo with a ratio of wall height to inner diameter less than 1.5. It has the advantages of small floor area, reasonable structural stress, strong seismic resistance, and good airtight performance. In terms of basic structure, a shallow silo usually consists of a silo bottom, a silo wall, a silo top, etc. The silo bottom usually adopts a reinforced concrete strip foundation; the silo wall adopts a reinforced concrete structure; a reinforced concrete spherical shell or conical shell structure is more common in the silo top structure. Among them, the construction of the silo wall generally adopts the slip formwork technology, and the silo top mostly adopts the silo top support system for construction. The silo top support system consists of a truss operation platform system and a central column support, etc. The truss operation platform system is a key place for construction workers to carry out various operations and stack materials, and is also an important support when pouring the concrete of the conical shell structure. It is like a fully functional "aerial base", providing a stable and reliable working environment for construction. On this platform, construction workers can carry out various construction operations such as steel bar binding, formwork adjustment, and concrete pouring in an orderly manner to ensure the smooth progress of the construction process. Moreover, the reasonable design and layout of the truss operation platform system fully consider the operation convenience and safety of construction workers, greatly improving the work efficiency of construction workers and reducing the construction delays and accident risks caused by inconvenient operation or safety hazards.
[0003] However, the removal of the silo top support system faces great challenges. In the traditional disassembly process of the silo top support system, the truss operation platform system is mostly disassembled piece by piece first, and then the central column support is gradually removed from a high altitude. However, since the truss operation platform system at the top is at a very high altitude from the ground, during the removal process, construction workers need to face high-altitude operations, so it will cause problems of difficult construction and construction hazards during removal. Summary of the Invention
[0004] Aiming at the deficiencies of the prior art, the present invention provides a device for removing intermediate standard section pairs and a using method thereof, which solves the problem that in the traditional silo top support system for the construction of the conical shell structure of the silo top, the truss operation platform system is mostly disassembled first in the entire disassembly process. However, since the truss operation platform system is at a very high altitude from the ground, during the removal process, construction workers need to face high-altitude operations, so it will cause problems of difficult construction and construction hazards during removal.
[0005] To achieve the above object, the present invention is realized by the following technical solutions: A demolition device for an intermediate standard section pair, including a support box, wherein a fitting structure is provided inside the support box, the middle parts of two symmetric support boxes are located on the outer wall of a flange plate, the flange plate is fixedly connected to both ends of a support column, the two flange plates are connected by fixing bolts, a support connection device is arranged on the outer wall of the support box, the bottom of the support connection device away from the support box is fixedly connected to a lifting drive device, the bottom of the lifting drive device is fixedly connected to the top surface of a stable support device, the fitting structure includes a bolt groove and a flange groove, the width of the bolt groove fits the diameter of the fixing bolt, the height of the flange groove fits the height of the flange plate, the support connection device includes a connecting arm, a support seat is arranged on the side of the connecting arm close to the support box, the lower part of the support seat is located on the bottom surface of the support box, the stable support device includes a support bottom plate, engaging openings are provided on the opposite sides of the two support bottom plates, a sliding device is arranged on the top surface of the stable support device, a first sliding groove is provided on the top surface of the support bottom plate, the sliding device is located inside the first sliding groove, and the bottom of the lifting drive device is fixedly connected to the top surface of the sliding device.
[0006] Preferably, the lifting drive device includes a first hydraulic push rod, the output end of the first hydraulic push rod is fixedly connected to the bottom surface of the support connection device, and the bottom of the first hydraulic push rod is fixedly connected to the top surface of the stable support device.
[0007] Preferably, the sliding device includes a sliding plate, the bottom of the sliding plate is fixedly connected to the top surface of a sliding block, a second sliding groove is provided on the bottom surface of the first sliding groove, the sliding block is slidably connected to the inner wall of the second sliding groove, the sliding plate is slidably connected to the inner wall of the first sliding groove, and a drive device is arranged on the side surface of the sliding plate.
[0008] Preferably, the drive device includes a second hydraulic push rod, the output end of the second hydraulic push rod is fixedly connected to the side wall of the sliding plate, and the side of the second hydraulic push rod away from the output end is fixedly connected to the side wall of the first sliding groove.
[0009] Preferably, positioning columns and positioning sockets are arranged on the opposite sides of the two support boxes, and the cross-sectional diameters of the positioning columns and the positioning sockets are equal.
[0010] A usage method of a demolition device for an intermediate standard section pair includes the following steps:
[0011] S1. Arrange two first sliding grooves around the bottommost support column.
[0012] S2. Install the sliding plate inside the first sliding groove, and then install the first hydraulic push rod on the upper surface of the sliding plate.
[0013] S3. Fix the bottom surface of the connecting arm to the output end of the first hydraulic push rod, and then fix the support box to the upper part of the support seat;
[0014] S4. Control the second hydraulic push rod to stretch the sliding plate in a direction away from the engaging opening;
[0015] S5. Control the first hydraulic push rod to rise, so that the height position of the flange groove corresponds to the outer wall of the flange plate connecting the second and third support columns counted from the ground upwards, and then keep the first hydraulic push rod at a constant height;
[0016] S6. Control the second hydraulic push rod to push the sliding plate in a direction close to the engaging opening so that the positioning column of one side support box engages with the positioning jack of the other side support box, and then stop the second hydraulic push rod from outputting thrust;
[0017] S7. Control the first hydraulic push rod to output thrust, so as to lift the bottom surface of the first support column counted from the ground upwards higher than the top surface of the support base plate, and then control the first hydraulic push rod to keep at a constant height;
[0018] S8. The worker uses a disassembly tool to disassemble the flange plate connecting the first and second support columns counted from the ground upwards, and then removes the first support column;
[0019] S9. Control the first hydraulic push rod to lower its height so that the ground surface of the second support column contacts the ground;
[0020] S10. Repeat the steps of S4 - S9 to complete the disassembly work.
[0021] The present invention provides a device for removing the intermediate standard section pair and its usage method. It has the following beneficial effects:
[0022] 1. The present invention clamps the upper flange plate through the support box, and then uses the first hydraulic push rod to lift the flange plate, so that the bottommost support column is lifted off the ground. Then, through the disassembly by the worker, the standard section can be quickly removed from the bottom, thus solving the problem that in the disassembly process of the traditional silo slip form, the support frame at the top is mostly disassembled first. However, due to the large height of the support frame at the top from the ground, during the disassembly process, construction workers need to face high-altitude operations, so it will cause construction difficulties and construction hazards.
[0023] 2. The present invention can support the first hydraulic push rod through the support base plate, thereby increasing the contact area between the bottom of the first hydraulic push rod and the ground, and further improving the overall stability, so as to ensure the safety during the construction process.
[0024] 3. Through the sliding plate arranged at the top of the supporting bottom plate, the present invention can distribute the load transmitted by the upper first hydraulic push rod into the supporting bottom plate. Meanwhile, through the second hydraulic push rod arranged on the side of the sliding plate, the position of the sliding plate can be moved, thereby driving the upper supporting box to open and close, thus achieving the purpose of conveniently fitting the flange and accelerating the construction process. Brief Description of the Drawings
[0025] Figure 1 is a three-dimensional structural schematic diagram of the present invention during operation;
[0026] Figure 2 is a three-dimensional structural schematic diagram of the present invention;
[0027] Figure 3 is a partial three-dimensional structural schematic diagram of the supporting box of the present invention;
[0028] Figure 4 is a partial three-dimensional structural schematic diagram of the supporting box of the present invention when engaged with the flange;
[0029] Figure 5 is a front view structural schematic diagram of the supporting box of the present invention;
[0030] Figure 6 is a partial three-dimensional structural schematic diagram of the connecting arm of the present invention;
[0031] Figure 7 is a partial upper three-dimensional structural schematic diagram of the supporting bottom plate of the present invention;
[0032] Figure 8 is a partial three-dimensional structural schematic diagram of the sliding plate of the present invention;
[0033] Figure 9 is a partial three-dimensional structural schematic diagram of the supporting bottom plate of the present invention.
[0034] Among them, 1. positioning column; 2. support column; 3. support box; 4. connecting arm; 5. flange; 6. first hydraulic push rod; 7. sliding plate; 8. supporting bottom plate; 9. first sliding groove; 10. engaging port; 11. second sliding groove; 12. second hydraulic push rod; 13. positioning jack; 14. bolt groove; 15. flange groove; 17. sliding block; 18. fixing bolt; 19. support seat. Detailed Embodiment
[0035] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0036] Please refer to the attached Figure 1 and the attached Figure 4 , an embodiment of the present invention provides a device for removing an intermediate standard section pair, including a support box 3. A fitting structure is provided inside the support box 3. The middle parts of two symmetric support boxes 3 are located on the outer wall of a flange plate 5. The flange plate 5 is fixedly connected to both ends of a support column 2. The two flange plates 5 are connected by fixing bolts 18. A support connection device is arranged on the outer wall of the support box 3. The bottom of the side of the support connection device away from the support box 3 is fixedly connected to a lifting drive device. The bottom of the lifting drive device is fixedly connected to the top surface of a stable support device.
[0037] Specifically, the support box 3 can play a role in clamping and wrapping the flange plate 5; through the fitting structure, the flange plate 5 and the fixing bolts 18 can be stably placed inside the support box 3; the flange plate 5 can play a role in connecting the support column 2; the fixing bolts 18 can play a role in connecting and fixing the flange plate 5, and further play a role in fixing the support column 2; the support connection device can play a role in connecting the support box 3 with a first hydraulic push rod 6, and further can transmit the thrust output by the first hydraulic push rod 6 to the support box 3, thereby changing the height of the flange plate 5; the lifting drive device can play a role in outputting thrust and at the same time play a role in fixing and supporting the flange plate 5 at a certain height; the stable support device can play a role in fixing the bottom of the first hydraulic push rod 6, and further can keep the first hydraulic push rod 6 stable during operation and prevent the risk of tipping; thus, this device can start disassembling from the bottom support column 2, and further can solve the problem that the support frame at the top of the traditional silo slip form is mostly disassembled first in the disassembly process of the entire slip form device. However, since the support frame at the top is at a very high height from the ground, during the disassembly process, construction workers need to face high-altitude operations, so it will cause construction difficulties and construction risks during disassembly.
[0038] Please refer to the attached Figure 3 - the attached Figure 5 , the fitting structure includes a bolt groove 14 and a flange groove 15. The width of the bolt groove 14 fits the diameter of the fixing bolt 18, and the height of the flange groove 15 fits the height of the flange plate 5.
[0039] Specifically, the bolt groove 14 can play a role in fitting the fixing bolt 18; the flange groove 15 can play a role in fitting and fixing the flange plate 5; the bolt groove 14 and the flange groove 15 can make the movement of the support box 3 smooth.
[0040] Please refer to the attached Figure 2 and the attached Figure 6 , the support connection device includes a connecting arm 4. A support seat 19 is arranged on the side of the connecting arm 4 close to the support box 3. The lower part of the support seat 19 is located on the bottom surface of the support box 3.
[0041] Specifically, the connecting arm 4 can connect the first hydraulic push rod 6 and also connect the support base 19, thereby transmitting the thrust of the first hydraulic push rod 6 to the support box 3; the support base 19 can fix the support box 3, thus efficiently transmitting the thrust.
[0042] Please refer to the attached Figure 2 and the attached Figure 7 , the stable support device includes a support base plate 8, and engaging ports 10 are formed on the opposite sides of the two support base plates 8.
[0043] Specifically, the support base plate 8 can increase the grounding area at the bottom of the first hydraulic push rod 6, thereby improving the stability of the first hydraulic push rod 6. At the same time, the support base plate 8 is filled with cast iron counterweight blocks. Cast iron has a relatively large density, which can provide a large counterweight effect, and it has high structural strength and good wear resistance; the engaging ports 10 can engage with the outer wall shape of the support column 2, thereby increasing the area in the direction close to the support column 2.
[0044] Please refer to the attached Figure 7 , a sliding device is provided on the top surface of the stable support device. A first sliding groove 9 is formed on the top surface of the support base plate 8. The sliding device is located inside the first sliding groove 9, and the bottom of the lifting drive device is fixedly connected to the top surface of the sliding device.
[0045] Specifically, the sliding device can drive the first hydraulic push rod 6 to slide, thereby moving the support box 3 away from or closer to the flange 5, so as to achieve the function of engaging with the flange 5; the first sliding groove 9 can limit the sliding device, thereby controlling the stable axial movement of the sliding device.
[0046] Please refer to the attached Figure 6 , the lifting drive device includes a first hydraulic push rod 6. The output end of the first hydraulic push rod 6 is fixedly connected to the bottom surface of the support connection device, and the bottom of the first hydraulic push rod 6 is fixedly connected to the top surface of the stable support device.
[0047] Specifically, the first hydraulic push rod 6 can output thrust, and through the corresponding structures connected in the middle, it can achieve the function of jacking up the support column 2.
[0048] Please refer to the attached Figure 8 and the attached Figure 9 , the sliding device includes a sliding plate 7. The bottom of the sliding plate 7 is fixedly connected to the top surface of the sliding block 17. A second sliding groove 11 is formed on the bottom surface of the first sliding groove 9. The sliding block 17 is slidably connected to the inner wall of the second sliding groove 11. The sliding plate 7 is slidably connected to the inner wall of the first sliding groove 9, and a drive device is provided on the side of the sliding plate 7.
[0049] Specifically, the sliding plate 7 can support the first hydraulic push rod 6, and further transfer the gravity of the upper part to the inside of the support bottom plate 8; the sliding block 17 can limit the sliding plate 7 inside the second sliding groove 11 and provide accurate guidance for the sliding plate 7; the driving device can push the sliding plate 7, thereby driving the opening and closing movement of the upper components.
[0050] Please refer to the appendix Figure 7 , the driving device includes a second hydraulic push rod 12. The output end of the second hydraulic push rod 12 is fixedly connected to the side wall of the sliding plate 7, and the side of the second hydraulic push rod 12 away from the output end is fixedly connected to the side wall of the first sliding groove 9.
[0051] Specifically, the second hydraulic push rod 12 can push the sliding plate 7.
[0052] Please refer to the appendix Figure 3 , on the opposite sides of the two support boxes 3, there are a positioning column 1 and a positioning socket 13. The cross-sectional diameter of the positioning column 1 is equal to the cross-sectional diameter of the positioning socket 13.
[0053] Specifically, the positioning column 1 can fit with the socket 13, so that the docking of the two support boxes 3 is more accurate and the offset caused by misalignment during docking is prevented.
[0054] Please refer to the appendix Figure 1 and the appendix Figure 9 , a method for using a disassembly device for an intermediate standard section pair includes the following steps:
[0055] S1. Fit and arrange two first sliding grooves 9 around the bottommost support column 2;
[0056] S2. Install the sliding plate 7 inside the first sliding groove 9, and then install the first hydraulic push rod 6 on the upper surface of the sliding plate 7;
[0057] S3. Fix the bottom surface of the connecting arm 4 to the output end of the first hydraulic push rod 6, and then fix the support box 3 to the upper part of the support seat 19;
[0058] S4. Control the second hydraulic push rod 12 to stretch the sliding plate 7 in a direction away from the engaging port 10;
[0059] S5. Control the first hydraulic push rod 6 to rise, so that the height position of the flange groove 15 corresponds to the outer wall of the flange plate 5 connecting the second and third support columns 2 counted from the ground upwards, and then keep the first hydraulic push rod 6 at a constant height;
[0060] S6. Control the second hydraulic push rod 12 to push the sliding plate 7 towards the engaging opening 10 until the positioning post 1 of one side support box 3 engages with the positioning socket 13 of the other side support box 3, and then stop the second hydraulic push rod 12 from outputting thrust;
[0061] S7. Control the first hydraulic push rod 6 to output thrust, thereby lifting the bottom surface of the first support column 2 counted from the ground above the top surface of the support bottom plate 8, and then control the first hydraulic push rod 6 to maintain the height;
[0062] S8. The worker uses a disassembly tool to disassemble the flange 5 connecting the first and second support columns 2 counted from the ground, and then remove the first support column 2;
[0063] S9. Control the first hydraulic push rod 6 to lower the height so that the ground surface of the second support column 2 contacts the ground;
[0064] S10. Repeat the steps of S4 - S9 to complete the disassembly work.
[0065] Specifically, through S1, two first sliding grooves 9 are arranged around the bottommost support column 2, so that the first sliding grooves 9 can be arranged centered on the support column 2, providing a clear reference for the subsequent installation of the entire demolition device; through S4, the second hydraulic push rod 12 is controlled to stretch the sliding plate 7 in a direction away from the engaging opening 10. Thus, by stretching the sliding plate 7, components such as the connecting arm 4 and the support box 3 installed above it can be driven to move away from the engaging opening 10 synchronously, thereby increasing the distance between the two support boxes 3, facilitating the movement of the support box 3 to a position corresponding to the height and position of the flange 5 to be demolished, and facilitating the subsequent precise fitting of the flange groove 15 of the support box 3 with the flange 5; through S5, the first hydraulic push rod 6 is controlled to rise, and then the height position of the flange groove 15 is corresponding to the outer wall of the flange 5 connecting the second and third support columns 2 counted from the ground upwards. Then, the first hydraulic push rod 6 is kept at this height, so that the support box 3 and the flange 5 can be aligned in advance, facilitating the subsequent clamping of the flange 5; through S6, the second hydraulic push rod 12 is controlled to push the sliding plate 7 in a direction close to the engaging opening 10 until the positioning post 1 of one side support box 3 is engaged with the positioning jack 13 of the other side support box 3, and then the second hydraulic push rod 12 stops outputting thrust. Thus, the flange 5 can be clamped by the support box 3; through S7, the first hydraulic push rod 6 is controlled to output thrust, and then the bottom surface of the first support column 2 counted from the ground upwards is lifted higher than the top surface of the support base plate 8. Then, the first hydraulic push rod 6 is kept at this height, so that the support column 2 can be lifted, and thus the bottommost support column 2 can be lifted off the ground. At this time, the demolition device bears the force; through S8, the worker uses a demolition tool to disassemble the flange 5 connecting the first and second support columns 2 counted from the ground upwards, and then removes the first support column 2. Thus, the support column 2 can be safely and conveniently disassembled from the bottom; through S9, the first hydraulic push rod 6 is controlled to lower its height, so that the ground surface of the second support column 2 contacts the ground, thereby reducing the elevation of the entire support device to achieve the demolition purpose; through S10, the steps of S4 - S9 are repeated to complete the demolition work, thereby gradually reducing the elevation of the support device. Finally, after all the support columns 2 are removed, the upper umbrella-shaped support platform can be disassembled on the ground, thus ensuring the safety of the disassembly.
[0066] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A device for removing an intermediate standard section pair, comprising a support box (3), characterized in that: The support box (3) has a matching structure inside, the middle parts of the two symmetrical support boxes (3) are located on the outer wall of the flange (5), the flange (5) is fixedly connected to the two ends of the support column (2), the two flanges (5) are connected by fixing bolts (18), the outer wall of the support box (3) is provided with a support connection device, the bottom of the support connection device away from the support box (3) is fixedly connected to a lifting drive device, the bottom of the lifting drive device is fixedly connected to the top surface of the stable support device, the matching structure includes a bolt groove (14) and a flange groove (15), the width of the bolt groove (14) matches the diameter of the fixing bolt (18), and the The height of the flange groove (15) matches the height of the flange plate (5); the supporting connection device comprises a connecting arm (4); a supporting seat (19) is provided on a side of the connecting arm (4) close to the supporting box (3); the lower part of the supporting seat (19) is located on the bottom surface of the supporting box (3); the stable supporting device comprises a supporting bottom plate (8); a snap-fitting opening (10) is provided on opposite sides of the two supporting bottom plates (8); a sliding device is provided on the top surface of the stable supporting device; a first sliding groove (9) is provided on the top surface of the supporting bottom plate (8); the sliding device is located inside the first sliding groove (9); and the bottom of the lifting drive device is fixedly connected to the top surface of the sliding device.
2. The device for removing the intermediate standard section pair according to claim 1, characterized in that: The lifting drive device comprises a first hydraulic push rod (6), the output end of the first hydraulic push rod (6) is fixedly connected to the bottom surface of the support connection device, and the bottom of the first hydraulic push rod (6) is fixedly connected to the top surface of the stabilizing support device.
3. The device for removing the intermediate standard section pair according to claim 2, characterized in that: The sliding device comprises a sliding plate (7), the bottom of the sliding plate (7) is fixedly connected to the top surface of a sliding block (17), the bottom surface of the first sliding groove (9) is provided with a second sliding groove (11), the sliding block (17) is slidably connected to the inner wall of the second sliding groove (11), the sliding plate (7) is slidably connected to the inner wall of the first sliding groove (9), and a driving device is arranged on the side of the sliding plate (7).
4. The device for removing the intermediate standard section pair according to claim 3, characterized in that: The driving device comprises a second hydraulic push rod (12), the output end of the second hydraulic push rod (12) being fixedly connected to the side wall of the sliding plate (7), and the side of the second hydraulic push rod (12) away from the output end being fixedly connected to the side wall of the first sliding groove (9).
5. The device for removing the intermediate standard section pair according to claim 4, characterized in that: A positioning column (1) and a positioning socket (13) are provided on opposite sides of the two support boxes (3); the cross-sectional diameter of the positioning column (1) is equal to the cross-sectional diameter of the positioning socket (13).
6. The method for using the device for removing the intermediate standard section pair according to claim 5, characterized in that: The following steps are involved: S1, arranging two first sliding grooves (9) around the periphery of a bottommost support column (2); S2, installing the sliding plate (7) inside the first sliding groove (9), and then installing the first hydraulic push rod (6) on the upper surface of the sliding plate (7); S3, fixedly connecting the bottom surface of the connecting arm (4) to the output end of the first hydraulic push rod (6), and then fixedly connecting the support box (3) to the upper part of the support seat (19); S4, controlling the second hydraulic push rod (12) to stretch the sliding plate (7) in a direction away from the engaging opening (10); S5, controlling the first hydraulic push rod (6) to rise, thereby making the height position of the flange groove (15) correspond to the outer wall of the flange plate (5) connected to the second and third support columns (2) from the ground, and then making the first hydraulic push rod (6) maintain the height; S6, controlling the second hydraulic push rod (12) to push the sliding plate (7) toward the engaging opening (10) so that the positioning column (1) of the support box (3) on one side engages with the positioning socket (13) of the support box (3) on the other side, and then stopping the second hydraulic push rod (12) from outputting thrust; S7, controlling the first hydraulic push rod (6) to output thrust, thereby raising the bottom surface of the first support column (2) from the ground to a level higher than the top surface of the support bottom plate (8), and then controlling the first hydraulic push rod (6) to maintain the height; S8. The worker uses a disassembly tool to disassemble the flange (5) connected to the first section of the support column (2) from the ground, and then removes the first section of the support column (2). S9, controlling the first hydraulic push rod (6) to descend so that the second support column (2) is in contact with the ground; S10. Repeat steps S4-S9 to complete the disassembly work.
Citation Information
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