A method for dismantling a wind power tower

Abstract

The present invention relates to the technical field of wind power mixed tower dismantling construction, and discloses a wind power mixed tower dismantling method, including steel strand dismantling, adapter ring dismantling, mixed tower section dismantling, bottom platform and converter dismantling. By adopting the above steps, the wind power mixed tower can be dismantled. By using an unloading device, the unloading operation can be performed at any position of the steel strand, and the process is simple and efficient, and the personnel operation is safe. By orderly implementing the steps of steel strand dismantling, adapter ring dismantling, mixed tower section dismantling, bottom platform and converter dismantling, the wind power mixed tower can be completely dismantled without causing damage to the intact tower, thereby ensuring the safety of the construction personnel.

Description

Technical Field

[0001] The invention relates to the technical field of wind power hybrid tower dismantling construction, and in particular to a wind power hybrid tower dismantling method. Background Art

[0002] After the wind turbine hybrid tower is hoisted, problems such as concrete falling off, loose joints, and tower tilting may occur. When such serious problems occur, the wind turbine hybrid tower needs to be dismantled to prevent accidents.

[0003] Most of the existing mixed tower demolition projects use blasting methods, which cause serious environmental pollution. Non-blasting section-by-section demolition processes are rarely used. Therefore, we provide a wind power mixed tower demolition method. Summary of the invention

[0004] In view of this, the present invention provides a method for dismantling a wind turbine hybrid tower to solve the problem of dismantling a wind turbine hybrid tower.

[0005] In a first aspect, the present invention provides a method for dismantling a wind turbine hybrid tower, comprising the following steps:

[0006] Steel strand removal: an unloading device is provided between the anchors at both ends of the steel strand, and the tension of the steel strand is removed by the unloading device;

[0007] Dismantling of the adapter ring: Assemble the adapter ring hoist and hang it on the main hoist hook, lift it to the height of the adapter ring, hang the adapter ring hoist and lift a load that is less than the weight of the equipment to be dismantled, and then cut the adapter ring and the mixing tower section. After the adapter ring is completely separated from the mixing tower section, slowly lift and load until the adapter ring is separated from the mixing tower section, and then hoist and dismantle the adapter ring to the ground;

[0008] Dismantling of mixed tower sections: The main crane hangs the mixed tower section hoist and lifts it to the height of the mixed tower section. The mixed tower section hoist is hung and a load less than the weight of the equipment to be dismantled is lifted. Then the mixed tower sections are cut until the two mixed tower sections are completely separated. After complete separation, the lifting and loading are slowly performed until the upper mixed tower section is lifted off the upper surface of the lower mixed tower section. Finally, the upper mixed tower section is hoisted and dismantled to the ground. Then the hoist of the next mixed tower section to be dismantled is hung and loaded, and finally the contact surface of the next mixed tower section is cut.

[0009] Disassembly of bottom platform and converter: When the mixed tower section is disassembled to a point suitable for disassembly of the bottom platform and the converter on it, install shackles and annular slings on the top of the converter, remove the connecting bolts between the converter base and the bottom platform, lift it away, and then disassemble the bottom platform.

[0010] In an optional embodiment, the steel strand removal comprises the following steps:

[0011] S1: Remove the outer sheath and restraint device of the steel strand;

[0012] S2: Separate the steel strands that need to be unloaded from the other steel strands in the cable with two spacers;

[0013] S3: Use the unloading device to remove the tension of the steel strands between the unloading devices, and cut off the steel strands at the upper end of the steel strands without tension;

[0014] S4: After the steel strand is cut, the lower end of the steel strand is gradually lowered using the unloading device to remove the tension of the entire steel strand, thus completing the unloading of the tension of one steel strand.

[0015] In an optional embodiment, the distance between the pads should ensure that the stripping distance of the steel strands can be greater than the length of the unloading device, and the size of the pads should ensure that the unloading device does not contact and damage the PE layer of other steel strands in the cable when working normally. Then the PE layer of the steel strands between the pads is stripped, the stripping length should be greater than the length of the unloading device, and the grease is wiped off the stripping area.

[0016] In an optional embodiment, steps S1 to S4 are repeated to remove the remaining steel strands in a symmetrical order.

[0017] In an optional embodiment, the steel strand removal further comprises the following steps:

[0018] Lowering of the cable body: After the tension of the entire bundle of steel strands is unloaded, the entire bundle of steel strands is lowered to the ground.

[0019] In an optional embodiment, between the removal of the adapter ring and the removal of the mixing tower section, the following steps are further included:

[0020] Build the operating platform: set up a suspended steel structure operating platform in the internal space of the mixed tower section. Use clamps to connect the lifting wire ropes to the hanging points in the symmetrical direction of the suspended steel structure operating platform. Use the main crane to adopt the balanced lifting method of each hanging point to horizontally lift the suspended steel structure operating platform to the embedded hanging points on the inner side of the mixed tower section for installation.

[0021] In an optional embodiment, the operation of the suspended steel structure operating platform in the mixed tower section includes the following steps:

[0022] S1: Start the crane to slowly drop the big hook, and connect the steel wire ropes to the hanging points with bow-shaped shackles respectively;

[0023] S2: Remove the connection point between the suspended steel structure operating platform and the mixed tower section, and then the personnel are on the suspended steel structure operating platform;

[0024] S3: Control the main crane to slowly lift the suspended steel structure operating platform. When the platform is lifted to the corresponding position, stop the crane operation and manually fix the lifting ears of the suspended steel structure operating platform to the pre-buried hanging points on the mixed tower section with bolts or chains;

[0025] S4: Remove the steel wire ropes at the hanging points of the suspended steel structure operating platform.

[0026] In an optional embodiment, in the step of dismantling the mixed tower section, a suspended steel structure operating platform is used inside the tower to pop out a cutting track positioning line, and an expansion wire is used to fix the cutting track. After the track is fixed, a concrete cutting machine is installed to perform cutting operations.

[0027] In an optional embodiment, in the step of dismantling the mixing tower section, a water drill hole opener is used to open holes in the horizontal seams of the inner wall of the mixing tower section, and then a splitter is inserted into the holes to cut the mixing tower section.

[0028] The wind power hybrid tower dismantling method provided by the present invention has the following advantages:

[0029] 1. The present invention provides a method for dismantling a wind power hybrid tower, comprising the following steps:

[0030] Steel strand removal: an unloading device is provided between the anchors at both ends of the steel strand, and the tension of the steel strand is removed by the unloading device;

[0031] Dismantling of the adapter ring: Assemble the adapter ring hoist and hang it on the main hoist hook, lift it to the height of the adapter ring, hang the adapter ring hoist and lift a load that is less than the weight of the equipment to be dismantled, and then cut the adapter ring and the mixing tower section. After the adapter ring is completely separated from the mixing tower section, slowly lift and load until the adapter ring is separated from the mixing tower section, and then hoist and dismantle the adapter ring to the ground;

[0032] Dismantling of mixed tower sections: The main crane hangs the mixed tower section hoist and lifts it to the height of the mixed tower section. The mixed tower section hoist is hung and a load less than the weight of the equipment to be dismantled is lifted. Then the mixed tower sections are cut until the two mixed tower sections are completely separated. After complete separation, the lifting and loading are slowly performed until the upper mixed tower section is lifted off the upper surface of the lower mixed tower section. Finally, the upper mixed tower section is hoisted and dismantled to the ground. Then the hoist of the mixed tower section to be dismantled is hung and loaded, and finally the cutting of the contact surface of the next mixed tower section is carried out.

[0033] Disassembly of bottom platform and converter: When the mixed tower section is disassembled to a point suitable for disassembly of the bottom platform and the converter on it, install shackles and annular slings on the top of the converter, remove the connecting bolts between the converter base and the bottom platform, lift it away, and then disassemble the bottom platform.

[0034] By adopting the above steps, the wind turbine hybrid tower can be dismantled. The unloading device can be used to perform unloading operations at any position of the steel strands. The process is simple and efficient, and the personnel can operate safely. By orderly implementing the steps of steel strand removal, adapter ring removal, hybrid tower section removal, and bottom platform and converter removal, the wind turbine hybrid tower can be completely dismantled without causing damage to the intact tower, thereby ensuring the safety of the construction personnel.

[0035] 2. The present invention provides a method for dismantling a wind turbine mixed tower. According to the hollow structural characteristics of the mixed tower section, in order to ensure the safety of the lifting and unloading construction of the mixed tower section, a suspended steel structure operating platform is designed in the internal space of the mixed tower section. By setting up the suspended steel structure operating platform, efficient dismantling operations can be carried out in any mixed tower section, and the operation is safe and convenient for construction personnel.

[0036] 3. The present invention provides a method for dismantling a wind power mixed tower. A concrete cutter is used to cut along the track plane. The horizontal quality of the cutting surface is controllable, ensuring that the mixed tower sections at both ends of the cutting surface are intact. The concrete cutter can be used to perform cutting operations in any direction, which increases the operability of the operation, improves the possibility of reusing the tower, and facilitates the inspection of the dismantled tower.

[0037] 4. The present invention provides a method for dismantling a wind turbine mixed tower, which uses a splitter to perform split-type dismantling of the mixed tower. Dismantling operations can be performed on any splicing surface, and the operation efficiency is high and there is no safety hazard. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the steel strand removal structure in the wind power hybrid tower removal method provided in an embodiment of the present invention;

[0040] Description of reference numerals:

[0041] 1- Pad. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] Example

[0045] This embodiment provides a method for dismantling a wind turbine hybrid tower, comprising the following steps:

[0046] Steel strand removal: An unloading device is set between the anchors at both ends of the steel strand to remove the tension of the steel strand through the unloading device;

[0047] Dismantling of the adapter ring: Assemble the adapter ring hoist and hang it on the main hoist hook, lift it to the height of the adapter ring, hang the adapter ring hoist and lift a load that is less than the weight of the equipment to be dismantled, and then cut the adapter ring and the mixing tower section. After the adapter ring and the mixing tower section are completely separated, slowly lift and load until the adapter ring and the mixing tower section are separated, and then hoist and dismantle the adapter ring to the ground;

[0048] Dismantling of mixed tower sections: The main crane hangs the mixed tower section hoist and lifts it to the height of the mixed tower section. The mixed tower section hoist is hung and a load less than the weight of the equipment to be dismantled is lifted. Then the mixed tower sections are cut until the two mixed tower sections are completely separated. After complete separation, the lifting and loading are slowly performed until the upper mixed tower section is lifted off the upper surface of the lower mixed tower section. Finally, the upper mixed tower section is hoisted and dismantled to the ground. Then the hoist of the next mixed tower section to be dismantled is hung and loaded, and finally the contact surface of the next mixed tower section is cut.

[0049] Disassembly of bottom platform and converter: When the mixed tower section is disassembled to a point suitable for disassembly of the bottom platform and the converter on it, install shackles and annular slings on the top of the converter, remove the connecting bolts between the converter base and the bottom platform, lift it away, and then disassemble the bottom platform.

[0050] By adopting the above steps, the wind turbine hybrid tower can be dismantled. The unloading device can be used to perform unloading operations at any position of the steel strands. The process is simple and efficient, and the personnel can operate safely. By orderly implementing the steps of steel strand removal, adapter ring removal, hybrid tower section removal, and bottom platform and converter removal, the wind turbine hybrid tower can be completely dismantled without causing damage to the intact tower, thereby ensuring the safety of the construction personnel.

[0051] Among them, before the steel strands are removed, a crane should be arranged to enter the site. After the crane enters the site, professional personnel will select a suitable position to support the crane based on the actual construction parameters of the crane to ensure that the crane is stable and does not sink.

[0052] In this embodiment, the above-mentioned anchors at both ends of the strand, the adapter ring hanger and the mixed tower section hanger are all existing construction tools. The unloading device is a prestressed tendon unloading device described in Chinese patent CN110616898A, so its principle is not described in detail.

[0053] In this embodiment, the steel strand removal includes the following steps:

[0054] S1: Remove the outer sheath and restraint device of the steel strand;

[0055] S2: Separate the steel strands to be unloaded from the other steel strands in the cable with two spacers 1;

[0056] S3: Use the unloading device to remove the tension of the steel strands between the unloading devices, and cut off the steel strands at the upper end of the steel strands without tension;

[0057] S4: After the steel strand is cut, the lower end of the steel strand is gradually lowered using the unloading device to remove the tension of the entire steel strand, thus completing the unloading of the tension of one steel strand.

[0058] In this embodiment, the distance between the spacers 1 should ensure that the stripping distance of the steel strands can be greater than the length of the unloading device. The size of the spacers 1 should ensure that the unloading device does not contact and damage the PE layer of other steel strands in the cable when it works normally. Then, the PE layer of the steel strands between the spacers 1 should be stripped. The stripping length should be greater than the length of the unloading device, and the grease should be wiped off the stripping area. Figure 1 As shown, two cushion blocks 1 are arranged between the steel strand to be unloaded and other steel strands in the cable, and L in the figure is the length of the steel strand after the PE layer is stripped off.

[0059] In this embodiment, after the unloading of the tension of one steel strand is completed, steps S1 to S4 are repeated to remove the remaining steel strands in a symmetrical order. Similarly, in the process of removing the cables, by removing them one by one in a symmetrical manner, problems such as vertical deviation of the tower can be prevented, and the removal is safe and reliable.

[0060] In this embodiment, before removing the last steel strand of a cable bundle, the anchor at the base end should be properly arranged to prevent it from falling and damaging or causing harm to the operator. After completing the unloading of the tension of all steel strands, the unloading device is removed to complete the unloading work.

[0061] In this embodiment, the removal of the steel strands also includes a cable body lowering step: after the tension of the entire bundle of steel strands is unloaded, the entire bundle of steel strands is lowered to the ground.

[0062] In this embodiment, between the removal of the adapter ring and the removal of the mixing tower section, the following steps are also included:

[0063] Build the operating platform: set up a suspended steel structure operating platform in the internal space of the mixed tower section. Use clamps to connect the lifting wire ropes to the hanging points in the symmetrical direction of the suspended steel structure operating platform. Use the main crane to adopt the balanced lifting method of each hanging point to horizontally lift the suspended steel structure operating platform to the embedded hanging points on the inner side of the mixed tower section for installation.

[0064] According to the hollow structure characteristics of the mixed tower section, in order to ensure the safety of the hoisting and unloading construction of the mixed tower section, a suspended steel structure operating platform is designed in the internal space of the mixed tower section. By setting up the suspended steel structure operating platform, efficient dismantling operations can be carried out in any mixed tower section, and the operation is safe and convenient for construction personnel.

[0065] In this embodiment, the operation of the suspended steel structure operating platform in the mixed tower section includes the following steps:

[0066] S1: Start the crane and slowly lower the big hook, and connect the wire rope to the hanging point with the bow shackle;

[0067] S2: Remove the connection point between the suspended steel structure operating platform and the mixed tower section, and then the personnel are on the suspended steel structure operating platform;

[0068] S3: Operate the main crane to slowly lift the suspended steel structure operating platform. When it reaches the corresponding position, stop the crane operation and manually fix the lifting ears of the suspended steel structure operating platform to the pre-buried hanging points on the mixed tower section with bolts or chains;

[0069] S4: Remove the steel wire ropes at the hanging points of the suspended steel structure operating platform.

[0070] In this embodiment, as an implementation method, in the step of dismantling the mixed tower section, a suspended steel structure operating platform is used inside the tower to pop out a cutting track positioning line, and an expansion wire is used to fix the cutting track. After the track is fixed, a concrete cutting machine is installed to perform cutting operations.

[0071] The concrete cutter can be used to cut along the track plane, and the horizontal quality of the cut surface can be controlled to ensure that the mixed tower sections at both ends of the cut surface are intact. The concrete cutter can also be used to cut in any direction, which increases the operability of the operation, improves the possibility of tower reuse, and facilitates the inspection of the dismantled tower.

[0072] As an alternative, in the step of removing the mixed tower section, a water drill hole opener is used to open holes in the horizontal seams of the inner wall of the mixed tower, and then a splitter is inserted into the hole to cut the mixed tower section. The splitter can generate a thrust of 400 tons. When the oil is fed in, the piston of the hydraulic rock splitting rod will extend, and the expansion force can reach 400 tons, so that the object is split and separated from the inside. When the splitting rod is working, it will not produce vibration, impact, noise, dust, flying debris, etc. The surrounding environment will not be affected, and it can work without interference even in densely populated areas or indoors, and next to precision equipment. The splitting rod can work controllably in a static hydraulic environment, and will not produce some dangerous hidden dangers like blasting and other impact demolition and rock drilling equipment; no complicated safety measures are required. The splitting rod can complete the splitting process in about one to two minutes, and can work continuously and uninterruptedly, with high efficiency, and no isolation or other time-consuming and expensive safety measures are required like blasting operations.

[0073] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A method for dismantling a wind power tower, characterized in that: The steps include: Steel strand removal: an unloading device is provided between the anchors at both ends of the steel strand, and the tension of the steel strand is removed by the unloading device; Dismantling of the adapter ring: Assemble the adapter ring hoist and hang it on the main hoist hook, lift it to the height of the adapter ring, hang the adapter ring hoist and lift a load that is less than the weight of the equipment to be dismantled, and then cut the adapter ring and the mixing tower section. After the adapter ring is completely separated from the mixing tower section, slowly lift and load until the adapter ring is separated from the mixing tower section, and then hoist and dismantle the adapter ring to the ground; Dismantling of mixed tower sections: The main crane hangs the mixed tower section hoist and lifts it to the height of the mixed tower section. The mixed tower section hoist is hung and a load less than the weight of the equipment to be dismantled is lifted. Then the mixed tower sections are cut until the two mixed tower sections are completely separated. After complete separation, the lifting and loading are slowly performed until the upper mixed tower section is lifted off the upper surface of the lower mixed tower section. Finally, the upper mixed tower section is hoisted and dismantled to the ground. Then the hoist of the next mixed tower section to be dismantled is hung and loaded, and finally the contact surface of the next mixed tower section is cut. Disassembly of bottom platform and converter: When the mixed tower section is disassembled to a point suitable for disassembly of the bottom platform and the converter on it, install shackles and annular slings on the top of the converter, remove the connecting bolts between the converter base and the bottom platform, lift it away, and then disassemble the bottom platform.

2. The method for dismantling a wind turbine hybrid tower according to claim 1, characterized in that: The steel strand removal comprises the following steps: S1: Remove the outer sheath and restraint device of the steel strand; S2: Separate the steel strands that need to be unloaded from the other steel strands in the cable with two spacers; S3: Use the unloading device to remove the tension of the steel strands between the unloading devices, and cut off the steel strands at the upper end of the steel strands without tension; S4: After the steel strand is cut, the lower end of the steel strand is gradually lowered using the unloading device to remove the tension of the entire steel strand, thus completing the unloading of the tension of one steel strand.

3. The method for dismantling a wind turbine hybrid tower according to claim 2, characterized in that: The distance between the pads should ensure that the stripping distance of the steel strands can be greater than the length of the unloading device. The size of the pads should ensure that the unloading device does not contact and damage the PE layer of other steel strands in the cable when working normally. Then peel off the PE layer of the steel strands between the pads. The stripping length should be greater than the length of the unloading device, and wipe off the grease at the stripping location.

4. The method for dismantling a wind turbine hybrid tower according to claim 2, characterized in that: Repeat steps S1 to S4 to remove the remaining steel strands in a symmetrical order.

5. The method for dismantling a wind turbine hybrid tower according to claim 4, characterized in that: The steel strand removal also includes the following steps: Lowering of the cable body: After the tension of the entire bundle of steel strands is unloaded, the entire bundle of steel strands is lowered to the ground.

6. The method for dismantling a wind turbine hybrid tower according to claim 1, characterized in that: Between the removal of the adapter ring and the removal of the mixing tower section, the following steps are also included: Build the operating platform: set up a suspended steel structure operating platform in the internal space of the mixed tower section. Use clamps to connect the lifting wire ropes to the hanging points in the symmetrical direction of the suspended steel structure operating platform. Use the main crane to adopt the balanced lifting method of each hanging point to horizontally lift the suspended steel structure operating platform to the embedded hanging points on the inner side of the mixed tower section for installation.

7. The method for dismantling a wind turbine hybrid tower according to claim 6, characterized in that: The operation of the suspended steel structure operating platform in the mixed tower section includes the following steps: S1: Start the crane to slowly drop the big hook, and connect the steel wire ropes to the embedded hanging points with bow-shaped shackles; S2: Remove the connection point between the suspended steel structure operating platform and the mixed tower section, and then the personnel are on the suspended steel structure operating platform; S3: Control the main crane to slowly lift the suspended steel structure operating platform. When the platform is lifted to the corresponding position, stop the crane operation and manually fix the lifting ears of the suspended steel structure operating platform to the pre-buried hanging points on the mixed tower section with bolts or chains; S4: Remove the steel wire ropes at the hanging points of the suspended steel structure operating platform.

8. The method for dismantling a wind turbine hybrid tower according to claim 6, characterized in that: During the demolition of the mixed tower section, the suspended steel structure operating platform inside the tower is used to pop out the cutting track positioning line, and the cutting track is fixed with expansion wire. After the track is fixed, a concrete cutting machine is installed to carry out the cutting operation.

9. The method for dismantling a wind turbine hybrid tower according to claim 6, characterized in that: In the step of dismantling the mixing tower section, a water drill hole opener is used to open holes in the horizontal seams of the inner wall of the mixing tower section, and then a splitter is inserted into the holes to cut the mixing tower section.

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