A method for disassembling a flexible support structure

Abstract

The present invention discloses a method for disassembling a flexible support structure, comprising a flexible support structure formed by pillars, main beams, load-bearing cables, VX frames, component cables and photovoltaic panels, and a manned crane. The method is used to dismantle the flexible support structure for installing photovoltaic panels on a sewage pool, and comprises the following steps: structural reinforcement and de-impurity, cleaning a photovoltaic component placement site, arranging a manned crane on the flexible support structure, determining a dismantling direction of the photovoltaic panels, dismantling the photovoltaic components, dismantling the VX frames, reinforcing the secondary structure, dismantling the load-bearing cables, dismantling the component cables and dismantling the steel structure. In view of the small space in the sewage plant, the difficulty in bringing in large equipment, the secondary disasters after the outbreak of natural disasters, and the urgent time, the method coordinates safety and efficiency, fully utilizes small equipment to perform efficient operations in a limited space, and takes into account the stress points of the pool structure and the complex stress and multi-directional dumping of the support structure, and adopts the most reasonable two-way binding fixing method to effectively prevent emergencies.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic panel mounting bracket disassembly, and in particular to a flexible bracket structure disassembly method. Background Art

[0002] The existing sewage treatment plant is equipped with several steel structures formed by columns and main beams above the sewage pool. Load-bearing cables and component cables are arranged between the main beams. Two component cables form a group. Several photovoltaic panels are installed on one component cable through four F pressure blocks. Several VX frames arranged side by side are arranged between the bottom of the component cable and the top of the load-bearing cable to convert the line force into surface force, and cooperate to form a flexible bracket structure with photovoltaic panels installed. The photovoltaic panels are all located above the sewage pool.

[0003] The central region of China has been continuously affected by extreme weather such as freezing rain and blizzards, resulting in large-scale power shortages, traffic disruptions and structural collapse. Distributed photovoltaic flexible support structures use less steel and their force-bearing structures are mainly flexible steel cables and steel strands. There is a large amount of prestress in the force-bearing system. Once part of the structure is damaged, the stressed steel strands and cables are very likely to cause secondary damage during the demolition process. Currently, there is no standard solution for the removal of flexible supports, and all are handled on-site. The present invention aims to study a method for dismantling photovoltaic flexible support structures in sewage treatment plants to avoid secondary damage after damage and to safely and efficiently dismantle the damaged structure. Summary of the invention

[0004] The present invention provides a method for disassembling a flexible support structure, aiming to solve the problems of secondary damage caused by disassembling a deformed photovoltaic panel flexible support structure and low disassembly safety and efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A method for dismantling a flexible support structure, comprising a flexible support structure formed by a support column, a main beam, a load-bearing cable, a VX frame, a component cable and a photovoltaic panel, and a manned crane, is used to dismantle the flexible support structure for installing a photovoltaic panel on a sewage pool, and comprises the following steps:

[0007] Step 1: Structural reinforcement and debris removal. The inclined side of the main beam is reinforced by setting an anti-tilt mechanism. The main beam forms a tight fit with the anchor point through the anti-tilt mechanism, and the debris on the surface of the photovoltaic panel is removed;

[0008] Step 2: Clean up the site where the photovoltaic modules are placed, clear the stacking area and take protective measures;

[0009] Step 3: Arrange a manned crane on the flexible support structure to facilitate workers to dismantle the photovoltaic panels above;

[0010] Step 4: Determine the direction of dismantling the photovoltaic panels, and dismantle them from the inner middle row to the outer row. Each row of photovoltaic panels should be dismantled from the edge in sequence.

[0011] Step 5: Remove the photovoltaic panels. First, fix the four corners of the photovoltaic panel with traction ropes, then remove the F pressure blocks on the photovoltaic panel, separate the photovoltaic panel from the component rope to complete the removal, and repeat the above steps until all photovoltaic panels are removed.

[0012] Step 6: Dismantle the VX frame. First dismantle the first dismantling point to separate the VX frame from the component cable. Then dismantle the second dismantling point to separate the adjacent VX frames. Keep the U-shaped buckle at the third dismantling point. The VX frame forms a sliding fit with the load-bearing cable through the U-shaped buckle. The traction rope is detachably fixed at one end of the U-shaped buckle. The traction rope is driven by mechanical equipment to make the suspended VX frame slide along the load-bearing cable. The force is manually adjusted to pull it out of the pool. Then dismantle the third dismantling point and the connection between the U-shaped buckle and the load-bearing cable. Repeat the above steps until all VX frames are dismantled.

[0013] Step 7: Secondary structural reinforcement: an anti-tilt mechanism is set on the non-tilted side of the main beam for anti-tilt reinforcement, and cooperates with the anti-tilt mechanism in Step 1 to form a bidirectional fixed fit for the main beam. The main beam forms a tension fit with the anchor point through the anti-tilt mechanism to prevent the main beam from collapsing on both sides after the load-bearing cable knot is removed;

[0014] Step 8: Remove the load-bearing cable, starting from the non-tilted side, release the stress with a tensioner. After the stress of the steel strand is released, gradually remove the fixing locks of the steel strand on the main beam, and recycle the components of the load-bearing cable and the steel strand;

[0015] Step 9: Remove the component cables, starting from the non-tilted side, and use the tensioner to release the stress. After the stress of the steel strand is released, gradually remove the fixed locks of the steel strand on the main beam and transfer them to the outside of the pool by crane for collection;

[0016] Step 10: Dismantle the steel structure. First dismantle the steel structure above the pool body, and then dismantle the steel structure around the pool body.

[0017] Preferably, the anti-tilt mechanism in Step 1 or Step 7 includes an electric hoist, which is arranged on a side away from the tilting direction of the main beam. The fixed end of the electric hoist forms a detachable fixed fit with the middle position of the main beam. The slings at the two output ends of the electric hoist are respectively tightened with the corresponding anchor points through anchor heads. The anchor points are symmetrically arranged about the electric hoist. The slings ensure tension to form a triangular fixation to ensure force balance.

[0018] More preferably, the method for determining the anchor point in Step 1 or Step 7 comprises the following steps:

[0019] When setting anchor points within the sewage pool, the anchor points are directly selected from the protruding parts of the shear walls on both sides of the sewage pool;

[0020] When setting an anchor point outside the sewage pool, a new protrusion is built at the corresponding position and selected as the anchor point.

[0021] Preferably, the stacking area in Step 2 is the basketball court and the open space around the pool. The photovoltaic modules after dismantling are inspected for appearance, and are classified and stored according to damaged and intact parts, and protective measures such as rain and sun protection are taken.

[0022] Preferably, the manned crane in Step 3 comprises a slide rail arranged above the sewage pool along the pool edge, a movable frame is slidably provided above the slide rail, the movable frame is perpendicular to the slide rail, and a movable and liftable hanging basket is provided at the bottom of the movable frame.

[0023] Preferably, the Step 5 further comprises: on a sunny day, covering the photovoltaic panel to be removed with a shade cloth, and removing the fixing device with a tool;

[0024] When dismantling PV panels, two people are in a group in the hanging basket. Each dismantler wears a tool kit and uses an electric wrench to remove the U-bolts on the four aluminum alloy F pressure blocks. While one person removes the screws, the other person places a net bag under the screws to prevent the screws and other parts from falling into the pool during dismantling.

[0025] Preferably, the Step 8 also includes: when the load-bearing cable is removed, there are two people in a group in the hanging basket, and each removal worker wears a tool kit. While one person removes the screws, the other person places a net bag under the screws and collects the steel strands to prevent the screws and other parts from falling into the pool during removal.

[0026] Preferably, the Step 9 also includes:

[0027] Step 901: During dismantling, two people work together in the hanging basket. Each dismantler wears a tool kit. While one person is removing the screws, the other person places a net bag under the screws to prevent the screws and other parts from falling into the pool during dismantling.

[0028] Step 902: Tie traction ropes to both ends of the component cable, and gradually loosen the U-shaped buckles at the top of the middle support beam in sequence;

[0029] Step 903: After all the U-shaped buckles are loosened, use a crane to hold the component cable in the middle for positioning, and pull the traction ropes at both ends to pull the component cable steel strand out of the pool as a whole, and then place it on the side;

[0030] Step 904: After the components are coiled up, they are placed in a pre-specified location for storage.

[0031] Preferably, the Step 10 also includes:

[0032] Step 1001: First use a manned crane to tie the main beam above the steel structure with a sling to prevent it from being unstable and falling down during dismantling;

[0033] Step 1002: Remove the horizontal and other fixing bolts of the steel structure, start from one side, remove the upper main beam first, and transfer it by a manned crane;

[0034] Step 1003: After each set of steel structure main beams is dismantled, tie the columns with slings, set a traction rope at the bottom, and finally release the bottom fixing bolts to lift and remove the columns. Some columns on the ground are installed with inverters. First, dismantle the inverters and place them in the designated location for storage.

[0035] Beneficial effects of the present invention:

[0036] 1. The present invention aims at the situation that the space in the sewage treatment plant is small, large equipment is difficult to enter, there are secondary disasters after the natural disaster, and time is tight. It coordinates safety and efficiency, makes full use of small equipment to perform efficient operations in a limited space, requires less equipment and human resources, first fix and then dismantle, avoids stress strikes, and dismantles symmetrically in the middle and then on both sides, effectively avoiding further damage to the structure and affecting the normal operation of the sewage treatment plant;

[0037] 2. The present invention selects anchor points above the pool to fix the damaged photovoltaic support structure, takes into account the stress points of the pool structure and the complex stress and multi-directional tilting of the support structure, and adopts the most reasonable two-way binding fixing method to effectively prevent emergencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of the present invention when it is dismantled;

[0039] Figure 2 It is a three-dimensional schematic diagram of the steel structure above the pool body of the present invention when it is damaged and tilted;

[0040] Figure 3 It is a schematic diagram of the structure of the VX frame of the present invention when it is disassembled;

[0041] Figure 4 It is a schematic diagram of the structure of the photovoltaic panel of the present invention when it is disassembled;

[0042] In the figure: 1, sewage pool; 101, protruding part; 2, column; 3, main beam; 4, load-bearing cable; 5, VX frame; 501, first disassembly point; 502, second disassembly point; 503, third disassembly point; 6, photovoltaic panel; 601, F pressure block; 7, anchor point; 8, component cable;

[0043] 9. Anti-tilt mechanism; 901. Electric hoist; 902. Sling; 903. Anchor head;

[0044] 10. Manned crane; 1001. Slide rail; 1002. Mobile frame; 1003. Hanging basket. DETAILED DESCRIPTION

[0045] As follows, embodiments are further described with reference to the accompanying drawings.

[0046] like Figure 1~Figure 4 As shown, as a preferred embodiment 1, a method for disassembling a flexible support structure includes a flexible support structure formed by a support column 2, a main beam 3, a load-bearing cable 4, a VX frame 5, a component cable 8 and a photovoltaic panel 6, and a manned crane 10, and is used to dismantle the flexible support structure installed with the photovoltaic panel 6 on the sewage pool 1, including the following steps:

[0047] Step 1: Structural reinforcement and debris removal. The inclined side of the main beam 3 is reinforced by setting an anti-tilt mechanism 9. The main beam 3 forms a tight fit with the anchor point 7 through the anti-tilt mechanism 9, and the debris on the surface of the photovoltaic panel 6 is removed;

[0048] Step 2: Clean up the site where the photovoltaic modules are placed, clear the stacking area and take protective measures;

[0049] Step 3: Arrange a manned crane 10 on the flexible support structure to facilitate workers to dismantle the photovoltaic panel 6;

[0050] Step 4: Determine the direction of dismantling the photovoltaic panels 6, and dismantle them from the inner middle row toward the outer row, and dismantle each row of photovoltaic panels 6 from the edge in sequence;

[0051] Step 5: Removing the photovoltaic components. First, fix the four corners of the photovoltaic panel 6 with traction ropes, then remove the F pressure block 601 on the photovoltaic panel 6, separate the photovoltaic panel 6 from the component rope 8 to complete the removal, and repeat the above steps until all photovoltaic panels 6 are removed.

[0052] Step 6: Disassemble the VX frame 5. First disassemble the first disassembly point 501 to separate the VX frame 5 from the component cable 8. Then disassemble the second disassembly point 502 to separate the adjacent VX frame 5. Keep the U-shaped buckle at the third disassembly point 503. The VX frame 5 forms a sliding fit with the load-bearing cable 4 through the U-shaped buckle. The traction rope is detachably fixed at one end of the U-shaped buckle. The traction rope is driven by mechanical equipment to make the suspended VX frame 5 slide along the load-bearing cable 4. Manual assistance is used to adjust the force to pull it out of the pool. Then disassemble the third disassembly point 503 and the connection between the U-shaped buckle and the load-bearing cable 4. Repeat the above steps until all VX frames 5 are disassembled.

[0053] Step 7: Secondary structural reinforcement: an anti-tilt mechanism 9 is set on the non-tilted side of the main beam 3 for anti-tilt reinforcement, and cooperates with the anti-tilt mechanism 9 in Step 1 to form a bidirectional fixed fit for the main beam 3. The main beam 3 forms a tightening fit with the anchor point 7 through the anti-tilt mechanism 9 to prevent the main beam 3 from collapsing on both sides after the load-bearing cable 4 is pulled and removed;

[0054] Step 8: Remove the load-bearing cable 4, starting from the non-tilted side, release the stress by using a tensioner. After the stress of the steel strand is released, gradually remove the fixing locks of the steel strand on the main beam 3, and recover the components and steel strand of the load-bearing cable 4;

[0055] Step 9: Remove the component cable 8, starting from the non-tilted side, and use the tensioner to release the stress. After the stress of the steel strand is released, gradually remove the fixing locks of the steel strand on the main beam 3, and transfer it to the outside of the pool for collection by crane;

[0056] Step 10: Dismantle the steel structure. First dismantle the steel structure above the pool body, and then dismantle the steel structure around the pool body.

[0057] As a preferred embodiment 2, the anti-tilt mechanism 9 in Step 1 or Step 7 includes an electric hoist 901, which is arranged on a side away from the tilting direction of the main beam 3. The fixed end of the electric hoist 901 forms a detachable fixed fit with the middle position of the main beam 3. The slings 902 at the two output ends of the electric hoist 901 form a tensioning fit with the corresponding anchor points 7 through the anchor heads 903 respectively. The anchor points 7 are symmetrically arranged about the electric hoist 901. The slings 902 ensure tension to form a triangular fixation to ensure force balance.

[0058] As a preferred embodiment 3, the method for determining the anchor point 7 in Step 1 or Step 7 comprises the following steps:

[0059] When the anchor point 7 is set within the sewage pool 1, the anchor point 7 is directly selected from the protruding parts 101 on the shear walls on both sides of the sewage pool 1;

[0060] When the anchor point 7 is set outside the sewage pool 1, a new protruding part 101 is built at the corresponding position and selected as the anchor point 7.

[0061] As a preferred embodiment 4, the Step 2 includes that the stacking area is the basketball court and the surrounding area of ​​the open space around the pool, the photovoltaic components after dismantling are checked for appearance, and are stored according to damaged parts and intact parts, and protective measures such as rain protection and sun protection are taken.

[0062] As a preferred embodiment 5, the manned crane 10 in Step 3 includes a slide rail 1001 arranged above the sewage pool 1 along the pool edge, a movable frame 1002 is slidably provided above the slide rail 1001, the movable frame 1002 is perpendicular to the slide rail 1001, and a movable and liftable hanging basket 1003 is provided at the bottom of the movable frame 1002.

[0063] As a preferred embodiment 6, the Step 5 further includes: when it is sunny on a sunny day, cover the photovoltaic panel 6 to be removed with a shade cloth, and then remove the fixing device with a tool;

[0064] When dismantling PV panels, two people are in a group in the hanging basket. Each dismantler wears a tool kit and uses an electric wrench to remove the U-bolts on the four aluminum alloy F pressure blocks 601. While one person removes the screws, the other person places a net bag under the screws to prevent the screws and other parts from falling into the pool during dismantling.

[0065] As a preferred embodiment 7, the Step 8 also includes: when the load-bearing cable 4 is dismantled, there are two people in a group in the hanging basket, and each dismantling worker wears a tool kit. While one person removes the screws, the other person places a net bag under the screws and collects the steel strands to prevent the screws and other parts from falling into the pool during dismantling.

[0066] As a preferred embodiment 8, the Step 9 further includes:

[0067] Step 901: During dismantling, two people work together in the hanging basket. Each dismantler wears a tool kit. While one person is removing the screws, the other person places a net bag under the screws to prevent the screws and other parts from falling into the pool during dismantling.

[0068] Step 902: Tie traction ropes to both ends of the component cable, and gradually loosen the U-shaped buckles at the top of the middle support beam in sequence;

[0069] Step 903: After all the U-shaped buckles are loosened, use a crane to hold the component cable in the middle for positioning, and pull the traction ropes at both ends to pull the component cable steel strand out of the pool as a whole, and then place it on the side;

[0070] Step 904: After the components are coiled up, they are placed in a pre-specified location for storage.

[0071] As a preferred embodiment 9, the Step 10 further includes:

[0072] Step 1001: First, use a manned crane 10 to tie the main beam 3 above the steel structure with a sling to prevent the dismantling from becoming unstable and falling;

[0073] Step 1002: Remove the horizontal and other fixing bolts of the steel structure, start from one side, first remove the upper main beam 3, and transfer it by the manned crane 10;

[0074] Step 1003: After each set of steel structure main beams 3 is dismantled, tie the columns 2 with slings, set a traction rope at the bottom, and finally release the bottom fixing bolts to lift and remove the columns. The columns 2 on the ground are installed with inverters. First, dismantle the inverters and place them in the designated location for storage.

[0075] As a preferred embodiment 10, the manned crane 10 is used for both carrying people and cargo, and can also be used for lifting heavy objects, which is a prior art.

Claims

1. A method for disassembling a flexible support structure, comprising a flexible support structure formed by a support column (2), a main beam (3), a load-bearing cable (4), a VX frame (5), a component cable (8) and a photovoltaic panel (6), and a manned crane (10), characterized in that: The method for dismantling a flexible support structure for installing a photovoltaic panel (6) on a sewage pool (1) comprises the following steps: Step 1: structural reinforcement and debris removal, the inclined side of the main beam (3) is provided with an anti-tilt mechanism (9) for anti-tilt reinforcement, the main beam (3) is tightened with the anchor point (7) through the anti-tilt mechanism (9), and debris on the surface of the photovoltaic panel (6) is removed; Step 2: Clean up the site where the photovoltaic modules are placed, vacate the stacking area and take protective measures; Step 3: Arranging a manned crane (10) on the flexible support structure to facilitate workers to dismantle the photovoltaic panel (6) above; Step 4: Determine the direction of removal of the photovoltaic panels (6), and remove them from the inner middle column toward the outer column, and remove each column of photovoltaic panels (6) from the edge in sequence; Step 5: Removing the photovoltaic components, first fix the four corners of the photovoltaic panel (6) by means of traction ropes, then remove the F pressure block (601) on the photovoltaic panel (6), separate the photovoltaic panel (6) from the component rope (8) to complete the removal, and repeat the above steps until all photovoltaic panels (6) are removed; Step 6: Dismantle the VX frame (5), first dismantle the first dismantling point (501), separate the VX frame (5) from the assembly cable (8), then dismantle the second dismantling point (502), separate the adjacent VX frames (5), retain the U-shaped buckle at the third dismantling point (503), the VX frame (5) forms a sliding fit with the load-bearing cable (4) through the U-shaped buckle, the traction rope is detachably fixed to one end of the U-shaped buckle, the traction rope is driven by a mechanical device to make the suspended VX frame (5) slide along the load-bearing cable (4), manually assist in adjusting the force to pull it out of the pool, then dismantle the connection between the third dismantling point (503) and the U-shaped buckle and the load-bearing cable (4), and repeat the above steps until all VX frames (5) are dismantled; Step 7: Secondary structural reinforcement: an anti-tilt mechanism (9) is provided on the non-tilted side of the main beam (3) for anti-tilt reinforcement, and cooperates with the anti-tilt mechanism (9) in Step 1 to form a bidirectional fixed fit with the main beam (3). The main beam (3) forms a tension fit with the anchor point (7) through the anti-tilt mechanism (9) to prevent the main beam (3) from collapsing on both sides after the load-bearing cable (4) is pulled and removed; Step 8: The load-bearing cable (4) is removed, starting from the non-tilted side, by releasing the stress with a tensioner. After the stress of the steel strand is released, the fixing locks of the steel strand on the main beam (3) are gradually removed, and the components of the load-bearing cable (4) and the steel strand are recovered; Step 9: Remove the component cable (8), starting from the non-tilted side, and use a tensioner to release the stress. After the stress of the steel strand is released, gradually remove the fixing locks of the steel strand on the main beam (3), and transfer it to the outside of the pool by crane for collection; Step 10: Dismantle the steel structure. First dismantle the steel structure above the pool body, and then dismantle the steel structure around the pool body.

2. A method for disassembling a flexible support structure according to claim 1, characterized in that: The anti-tilt mechanism (9) in Step 1 or Step 7 comprises an electric hoist (901), the electric hoist (901) being arranged on a side away from the tilting direction of the main beam (3), the fixed end of the electric hoist (901) forming a detachable fixed fit with the middle position of the main beam (3), the slings (902) at the two output ends of the electric hoist (901) forming a tension fit with the corresponding anchor points (7) through anchor heads (903), the anchor points (7) being symmetrically arranged with respect to the electric hoist (901), and the slings (902) ensuring tension forming a triangular fixation to ensure force balance.

3. A method for disassembling a flexible support structure according to claim 2, characterized in that: The method for determining the anchor point (7) in Step 1 or Step 7 comprises the following steps: When the anchor points (7) are set within the sewage pool (1), the anchor points (7) are directly selected from the protruding parts (101) on the shear walls on both sides of the sewage pool (1); When the anchor point (7) is set outside the sewage pool (1), a new protruding portion (101) is constructed at the corresponding position and selected as the anchor point (7).

4. A method for disassembling a flexible support structure according to claim 1, characterized in that: The Step 2 includes that the stacking area is the basketball court and the open space around the pool. The photovoltaic modules after dismantling are inspected for appearance, and are stored according to damaged and intact parts, and rain and sun protection measures are taken.

5. A method for disassembling a flexible support structure according to claim 1, characterized in that: The manned crane (10) in Step 3 comprises a slide rail (1001) arranged above the sewage pool (1) along the pool edge, a movable frame (1002) is slidably provided above the slide rail (1001), the movable frame (1002) is perpendicular to the slide rail (1001), and a movable and liftable hanging basket (1003) is provided at the bottom of the movable frame (1002).

6. A method for disassembling a flexible support structure according to claim 1, characterized in that: The step 5 also includes: when it is sunny on a clear day, cover the photovoltaic panel (6) to be removed with a shade cloth, and then remove the fixing device with a tool; When dismantling PV panels, two people are in a group in the hanging basket. Each dismantler wears a tool kit and uses an electric wrench to remove the U-bolts on the four aluminum alloy F pressure blocks (601). While one person removes the screws, the other person places a net bag under the screws to prevent the screw parts from falling into the pool during dismantling.

7. A method for disassembling a flexible support structure according to claim 1, characterized in that: The Step 8 also includes: when the load-bearing cable (4) is removed, two persons are in a group in the hanging basket, each of the removal personnel wears a tool kit, and while one person removes the screws, the other person places a net bag under the screws and collects the steel strands to prevent the screw parts from falling into the pool during removal.

8. A method for disassembling a flexible support structure according to claim 1, characterized in that: The Step 9 also includes: Step 901: During dismantling, two people work together in the hanging basket. Each dismantler wears a tool kit. While one person is removing the screws, the other person places a net bag under the screws to prevent the screw parts from falling into the pool during dismantling. Step 902: Tie traction ropes to both ends of the component cable, and gradually loosen the U-shaped buckles at the top of the middle support beam in sequence; Step 903: After all the U-shaped buckles are loosened, use a crane to hold the component cable in the middle for positioning, and pull the traction ropes at both ends to pull the component cable steel strand out of the pool as a whole, and then place it on the side; Step 904: After the components are coiled up, they are placed in a pre-specified location for storage.

9. A method for disassembling a flexible support structure according to claim 1, characterized in that: The Step 10 also includes: Step 1001: First, use a manned crane (10) to tie the main beam (3) above the steel structure with a sling to prevent it from becoming unstable and falling during demolition; Step 1002: Remove the horizontal and other fixing bolts of the steel structure, start from one side, first remove the upper main beam (3), and transfer it by a manned crane (10); Step 1003: After each set of steel structure main beams (3) is dismantled, the columns (2) are tied with slings, a traction rope is set at the bottom, and finally the bottom fixing bolts are released to lift and remove the columns. The columns (2) on the ground are installed with inverters. The inverters are first dismantled and placed in a designated location for storage.

Images