System for precise leveling in construction of wind turbine foundation anchor cage and method of use

Abstract

The application discloses a system and a use method for accurate leveling in fan foundation anchor cage construction, which is used for adjusting the position of an anchor cage and anchor plates thereon; the system comprises an external fixing facility unit group and an anchor plate fixer unit group; a horizontal connecting rod unit group is arranged between the anchor plate fixer unit group and the corresponding external fixing facility unit group; a connecting piece unit group is arranged between two anchor plate fixer unit groups in the same diameter direction; one end of a long connecting rod of the horizontal connecting rod unit group is connected with the external fixing facility unit group, and the other end is connected with a fixed frame of the anchor plate fixer unit group in a lockable moving pair connection; two ends of a short connecting rod of the connecting piece unit group are respectively connected with the corresponding two fixed frames in a lockable moving pair connection; the short connecting rod and the long connecting rod connected with the same fixed frame in the lockable moving pair connection are provided with accurate fine adjustment reverse tooth bolts. The application effectively controls the position of the anchor cage and the anchor plates thereon in the fan foundation pouring process.

Description

Technical Field

[0001] This invention relates to the field of wind turbine foundation construction technology in wind power engineering, and in particular to a system and method for precise leveling during the construction of wind turbine foundation anchor cages. Background Technology

[0002] Wind turbine foundations typically employ a cylindrical and frustum-shaped cast-in-place reinforced concrete structure. Anchor bolts of appropriate specifications are pre-embedded inside the central cylinder according to the size and model of the wind turbine tower, forming a unified whole with the concrete foundation. This facilitates the later fixing of the wind turbine tower and ensures the wind turbine's structural safety under wind loads.

[0003] Due to the large size and high stress of wind turbine towers, a large number of anchor bolts are required at the bottom of the tower. These are typically arranged in two concentric circles, one inner and one outer. Each anchor bolt needs a certain anchorage length. To ensure the overall position of the anchor bolts remains relatively fixed, maintain stability during concrete foundation pouring, and facilitate tower installation, two anchor plates are usually installed at the top and bottom of each anchor bolt. The anchor bolts and anchor plates are fixed with nuts, forming an anchor bolt cage. The bottom of the anchor bolt cage is fixed to the embedded parts in the concrete foundation pad by welding. The flatness and elevation of the anchor bolts and anchor plates need to be adjusted using measuring equipment such as a level before the foundation concrete is poured. After ensuring that the elevation and flatness meet the specified requirements, all nuts are tightened to secure the anchor bolt cage, after which the concrete foundation can be poured.

[0004] For safety and installation purposes, the exposed length of the anchor bolts and the flatness tolerance of the anchor plates in the wind turbine foundation anchor cage are subject to strict requirements. The flatness tolerance of the anchor plates should generally not exceed 2mm. Therefore, controlling the overall displacement of the anchor cage and the flatness of the anchor plates is crucial during wind turbine foundation construction. If the anchor cage shifts significantly due to concrete impacts or vibrations during concrete pouring, it can easily lead to the anchor plate flatness exceeding the limit. Since concrete construction is continuous and cannot be interrupted, it is difficult to promptly re-measure and adjust the anchor cage using leveling instruments or other measuring equipment. Furthermore, once the concrete structure has completed construction and reached its strength, the anchor cage has no room for adjustment, which will pose a potential hazard to the installation of the wind turbine tower and its subsequent operational safety.

[0005] Currently, construction workers typically use a method of driving several vertical fixing steel bars into the soil around the wind turbine foundation pit and tightening the anchor cage with nylon ropes to ensure the stability of the steel cage during the concrete pouring process.

[0006] However, this method has significant drawbacks:

[0007] First, the vertical reinforcing bars are fixed in the ground, making them prone to shifting;

[0008] Secondly, although the nylon rope is taut, the rope tension is very easy to loosen during vibration. During the concrete pouring process, the rope knot can easily fail due to vibration, thus failing to fix the anchor cage.

[0009] Furthermore, this fixing method cannot detect whether the anchor cage has shifted in time, and once the anchor cage shifts, it cannot be corrected in time, let alone accurately.

[0010] Therefore, how to effectively control the stability of the anchor cage position during the wind turbine foundation pouring process has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0011] In view of the above-mentioned deficiencies of the prior art, the present invention provides a system and method for precise leveling in the construction of anchor cages for wind turbine foundations, the purpose of which is to effectively control the stability of the position of the anchor cages during the pouring of wind turbine foundations.

[0012] To achieve the above objectives, the present invention discloses a system for precise leveling during the construction of wind turbine foundation anchor cages, used to adjust the position of the anchor cages and their upper anchor plates set in the foundation pit relative to the horizontal plane; the foundation pit is used for pouring wind turbine foundations;

[0013] This includes 2n or more groups of external fixing facilities units that are evenly distributed around the axis of the anchor cage and arranged around the foundation pit; where n is a natural number of 2 or more.

[0014] And, on the upper anchor plate of the anchor cage, there are 2n or more sets of anchor plate fixing units evenly distributed around the axis of the anchor cage.

[0015] All the anchor plate fixing unit groups and all the external fixing facility unit groups correspond one-to-one, and each anchor plate fixing unit group and the corresponding external fixing facility unit group are arranged in the same radial direction of the anchor bolt cage.

[0016] A horizontal connecting rod unit group is provided between each of the anchor plate fixing unit groups and the corresponding external fixing facility unit groups;

[0017] In all the anchor plate fixing unit groups, there is a connecting unit group between two anchor plate fixing unit groups located in the same diameter direction of the anchor bolt cage;

[0018] Each of the aforementioned external fixed facility units includes a concrete foundation located below the ground outside the wind turbine foundation, and a vertical fixing rod installed on the concrete foundation;

[0019] Each of the anchor plate fixing unit groups includes a fixing frame fixedly connected to the upper anchor plate, and a level mounted on the fixing frame;

[0020] The level installed on each of the aforementioned fixed frames is a fixed frame level;

[0021] Each horizontal connecting rod unit group includes a long connecting rod;

[0022] One end of each of the long connecting rods is connected to the corresponding vertical fixed rod, and the other end is connected to the corresponding fixed frame in a lockable movable pair.

[0023] Each of the aforementioned connector units includes a short connecting rod and a short connecting rod level disposed on each of the aforementioned short connecting rods;

[0024] Both ends of each of the short connecting rods are respectively connected to the two corresponding fixed frames in a lockable sliding pair;

[0025] A precise fine-tuning reverse thread bolt is provided between the short connecting rod and the long connecting rod, which are connected to the same fixed frame in a lockable movable pair;

[0026] Each of the aforementioned precision fine-tuning reverse thread bolts includes two coaxially arranged external threads with opposite directions of rotation, and a screwing part that is connected to the two external threads respectively via an internal thread;

[0027] Each of the precision micro-adjustment reverse thread bolts has two external threads that are respectively fixedly connected to the corresponding short connecting rod and the corresponding long connecting rod.

[0028] Preferably, it includes 4 sets of external fixing facility units, 4 sets of anchor plate fixing unit units, 4 sets of horizontal connecting rod unit units, and 2 sets of connector unit units;

[0029] The four external fixed facility unit groups respectively include a first concrete foundation and a first vertical fixing rod, a second concrete foundation and a second vertical fixing rod, a third concrete foundation and a third vertical fixing rod, and a fourth concrete foundation and a fourth vertical fixing rod;

[0030] The four anchor plate fixing unit groups respectively include a first fixing frame and a first fixing frame level, a second fixing frame and a second fixing frame level, a third fixing frame and a third fixing frame level, and a fourth fixing frame and a fourth fixing frame level;

[0031] The four horizontal connecting rod unit groups respectively include a first long connecting rod, a second long connecting rod, a third long connecting rod, and a fourth long connecting rod;

[0032] The two connecting unit groups each include a first short connecting rod and a first short connecting rod level, a second short connecting rod and a second short connecting rod level;

[0033] A first precision micro-adjustment reverse thread bolt and a third precision micro-adjustment reverse thread bolt are provided between the first long connecting rod, the third long connecting rod and the first short connecting rod;

[0034] A second precision fine-tuning reverse thread bolt and a fourth precision fine-tuning reverse thread bolt are provided between the second long connecting rod, the fourth long connecting rod and the second short connecting rod.

[0035] More preferably, the first fixing frame, the second fixing frame, the third fixing frame and the fourth fixing frame are all vertically arranged rectangular frames, including two vertically arranged vertical rods, an upper horizontal rod arranged at the upper end of the two vertical rods and a lower horizontal rod arranged at the lower end of the two vertical rods;

[0036] The first fixed frame level, the second fixed frame level, the third fixed frame level, and the fourth fixed frame level are all respectively installed between the upper crossbar and the lower crossbar of the corresponding first fixed frame, second fixed frame, third fixed frame, or fourth fixed frame.

[0037] More preferably, the upper crossbar and the lower crossbar of the first fixing frame, the second fixing frame, the third fixing frame and the fourth fixing frame are respectively provided with a first elongated hole, a second elongated hole, a third elongated hole and a fourth elongated hole;

[0038] The first, second, third, and fourth elongated holes of each of the upper crossbars are respectively connected to the corresponding first, second, third, fourth, first, or second long connecting rods by means of a first sliding bolt and a first temporary fixing nut, a second sliding bolt and a second temporary fixing nut, a third sliding bolt and a third temporary fixing nut, and a fourth sliding bolt and a fourth temporary fixing nut, to form a lockable movable pair connection with the corresponding first long connecting rod, the corresponding second long connecting rod, the corresponding third long connecting rod, the corresponding fourth long connecting rod, the corresponding first short connecting rod, or the corresponding second short connecting rod.

[0039] The first, second, third, and fourth elongated holes of each of the lower crossbars are fitted onto the anchor bolts at the corresponding positions of the anchor bolt cage and secured by the corresponding anchor bolt nuts.

[0040] More preferably, each of the rectangular frames is supported by a rigid material;

[0041] The hard material is steel or aluminum alloy;

[0042] The first vertical fixing rod, the second vertical fixing rod, the third vertical fixing rod, and the fourth vertical fixing rod are all made of thick steel bars or steel pipes;

[0043] Both the first short connecting rod and the second short connecting rod are made of the aforementioned hard material, and have an upward or downward protruding arc structure at their intersections.

[0044] More preferably, the ends of the first long connecting rod connected to the first vertical fixing rod, the ends of the second long connecting rod connected to the second vertical fixing rod, the ends of the third long connecting rod connected to the third vertical fixing rod, and the ends of the fourth long connecting rod connected to the fourth vertical fixing rod are all provided with rings that can be inserted into the first vertical fixing rod, the second vertical fixing rod, the third vertical fixing rod, or the fourth vertical fixing rod;

[0045] The first vertical fixing rod, the second vertical fixing rod, the third vertical fixing rod, and the fourth vertical fixing rod are all provided with external threads near their upper ends;

[0046] The first long connecting rod, the second long connecting rod, the third long connecting rod, and the fourth long connecting rod are all fixed by fitting the corresponding rings onto the corresponding first vertical fixing rod, the second vertical fixing rod, the third vertical fixing rod, or the fourth vertical fixing rod, and respectively setting a first fixing nut, a second fixing nut, a third fixing nut, and a fourth fixing nut on the corresponding external threads.

[0047] This invention also provides a method for using a system for precise leveling during the construction of wind turbine foundation anchor cages, the steps of which are as follows:

[0048] Step 1: Based on the dimensions of the anchor cage and the dimensions of the foundation pit for the wind turbine foundation to be poured, fabricate all external fixing facility unit groups, all horizontal connecting rod unit groups, all connector unit groups, and all anchor plate fixing unit groups.

[0049] Step 2: During the installation of the anchor cage, before tightening the anchor nuts above the upper anchor plate, set up all the fixing frames and fix all the fixing frames by tightening the anchor nuts above the upper anchor plate.

[0050] Step 3: Install a level on each of the aforementioned brackets;

[0051] Step 4: On the outside of the wind turbine foundation, pour a concrete foundation aligned with the radial direction of the anchor cage of each of the aforementioned fixing frames, and install a vertical fixing rod on each of the aforementioned concrete foundations;

[0052] Step 5: Fix one end of each long connecting rod to the corresponding vertical fixing rod, and connect the other end of each long connecting rod to the corresponding fixing frame to form a lockable movable pair connection;

[0053] Step 6: Install all the short connecting rods, and connect both ends of each short connecting rod to the corresponding two fixed frames to form a lockable movable pair connection;

[0054] Step 7: Install a precision fine-tuning reverse thread bolt between the long connecting rod and the short connecting rod of each of the aforementioned fixing frames;

[0055] Step 8: Use a level to check the horizontal status of the anchor cage and the upper anchor plate to ensure that they are within the horizontal error range, and check all levels to ensure that they are in a horizontal state;

[0056] Step 9: While pouring the concrete for the wind turbine foundation, monitor all fixed frame levels and all short connecting rod levels.

[0057] If any of the fixed frame level instruments or any of the short link level instruments deviates, the lockable sliding joint connection of the corresponding long link or the corresponding short link shall be released, and adjustment shall be made by the corresponding precision fine-tuning reverse thread bolt.

[0058] Step 10: After the wind turbine foundation has hardened to the required strength, remove all the connecting component units, horizontal connecting rod units, anchor plate fixing units, and external fixing facility units in sequence; then retighten the upper anchor bolt nuts on the anchor bolt cage corresponding to each anchor plate fixing unit.

[0059] Preferably, in step 9, when the first fixed frame level, the third fixed frame level, and the first short connecting rod level show a shift toward the third concrete foundation, while the second fixed frame level, the fourth fixed frame level, and the second short connecting rod level in another direction show a horizontal position, it indicates that the anchor cage and the upper anchor plate have shifted toward the third concrete foundation, but have not shifted in the vertical direction of the line connecting the third concrete foundation to the first concrete foundation.

[0060] The adjustment method is as follows:

[0061] Loosen the lockable movable joint connection between the first fixed bracket and the first long connecting rod.

[0062] And the lockable movable joint connection between the third fixed frame and the third long connecting rod,

[0063] Adjust the first and third precision fine-tuning reverse thread screws.

[0064] The process continues until the first fixed frame level, the third fixed frame level, and the first short connecting rod level return to their horizontal positions.

[0065] Then relock the lockable movable joint connection between the first fixed frame and the first long connecting rod.

[0066] And a lockable movable joint connection between the third fixed frame and the third long connecting rod.

[0067] The beneficial effects of this invention are:

[0068] This invention can easily and efficiently fix the anchor cage in place during foundation construction, preventing misalignment during concrete pouring.

[0069] This invention can monitor the positioning of the anchor cage and the flatness of the anchor plate in real time during the pouring of the wind turbine foundation. Once the anchor cage is misaligned or the flatness of the anchor plate deviates, it can be adjusted back to the error requirement range in real time with precision.

[0070] This invention can be recycled and reused, saving costs.

[0071] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0072] Figure 1 This diagram illustrates the state of the anchor cage during leveling in one embodiment of the present invention.

[0073] Figure 2 A schematic diagram of an embodiment of the present invention is shown.

[0074] Figure 3 A schematic diagram of the anchor cage in one embodiment of the present invention is shown.

[0075] Figure 4 This diagram illustrates the structure of a third concrete foundation and a third vertical fixing rod in one embodiment of the present invention.

[0076] Figure 5 This diagram shows a partially enlarged view of the connection position between the third vertical fixing rod and the third long connecting rod in one embodiment of the present invention.

[0077] Figure 6 A schematic diagram of the structure of the third fixing frame in one embodiment of the present invention is shown.

[0078] Figure 7 This diagram shows a partially enlarged structural schematic of a third fixing frame forming a lockable movable joint connection with the third long connecting rod and the first short connecting rod in one embodiment of the present invention.

[0079] Figure 8 The diagram shows a structural schematic of the first short connecting rod and the second short connecting rod in one embodiment of the present invention. Detailed Implementation

[0080] Example

[0081] like Figures 1 to 8 As shown, a system for precise leveling during the construction of wind turbine foundation anchor cages is used to adjust the position of the anchor cage 200 and its upper anchor plate 201 relative to the horizontal plane, which is set in the foundation pit; the foundation pit is used to pour the wind turbine foundation 100.

[0082] This includes 2n or more sets of external fixed facility units 600 that are evenly distributed around the axis of the anchor cage 200 and set around the foundation pit; where n is a natural number of 2 or more.

[0083] And, 2n or more sets of anchor plate fixing unit groups 300 are evenly distributed around the axis of the anchor plate 200 on the upper anchor plate 201 of the anchor cage 200.

[0084] All anchor plate fixing unit groups 300 and all external fixing facility unit groups 600 correspond one-to-one, and each anchor plate fixing unit group 300 and the corresponding external fixing facility unit group 600 are set in the same radial direction of the anchor bolt cage 200.

[0085] A horizontal connecting rod unit group 500 is provided between each anchor plate fixing unit group 300 and the corresponding external fixing facility unit group 600.

[0086] In all anchor plate fixing unit groups 300, there is a connecting unit group 400 between two anchor plate fixing unit groups 300 located in the same diameter direction of the anchor bolt cage 200.

[0087] Each external fixed facility unit group 600 includes a concrete foundation set on the ground outside the wind turbine foundation 100, and a vertical fixing rod set on the concrete foundation.

[0088] Each anchor plate fixing unit group 300 includes a fixing frame fixedly connected to the upper anchor plate 201, and a level installed on the fixing frame;

[0089] The level installed on each fixed frame is a fixed frame level.

[0090] Each horizontal connecting rod unit group 500 includes a long connecting rod;

[0091] One end of each long connecting rod is connected to the corresponding vertical fixed rod, and the other end is connected to the corresponding fixed frame in a lockable movable pair.

[0092] Each connector unit group 400 includes a short connecting rod and a short connecting rod level provided on each short connecting rod;

[0093] Each short connecting rod has two ends connected to two corresponding fixed brackets in a lockable sliding pair;

[0094] Precision micro-adjustment reverse thread bolts are provided between the short connecting rod and the long connecting rod, which are connected to the same fixed frame in a lockable sliding joint.

[0095] Each precision fine-tuning reverse thread bolt includes two coaxially arranged external threads with opposite directions of rotation, and a screwing part that is connected to the two external threads respectively through an internal thread;

[0096] Each precision fine-tuning reverse thread bolt has two external threads that are fixedly connected to the corresponding short connecting rod and the corresponding long connecting rod, respectively.

[0097] In practical applications, the present invention can consist of 6 external fixing facility unit groups 600, 6 anchor plate fixing unit groups 300, 6 horizontal connecting rod unit groups 500 and 3 connector unit groups 400, or 8 external fixing facility unit groups 600, 8 anchor plate fixing unit groups 300, 8 horizontal connecting rod unit groups 500 and 4 connector unit groups 400.

[0098] In practical applications, the two external threads of each precision fine-tuning reverse thread bolt are fixed to the corresponding short connecting rod and the corresponding long connecting rod by welding.

[0099] In some embodiments, it includes four external fixing unit groups 600, four anchor plate fixing unit groups 300, four horizontal connecting rod unit groups 500 and two connector unit groups 400;

[0100] The four external fixed facility unit groups 600 respectively include a first concrete foundation 602 and a first vertical fixing rod 601, a second concrete foundation 612 and a second vertical fixing rod 611, a third concrete foundation 622 and a third vertical fixing rod 621, and a fourth concrete foundation 632 and a fourth vertical fixing rod 631.

[0101] The four anchor plate fixing unit groups 300 respectively include a first fixing frame 301 and a first fixing frame level 303, a second fixing frame 311 and a second fixing frame level 313, a third fixing frame 321 and a third fixing frame level 323, and a fourth fixing frame 331 and a fourth fixing frame level 333;

[0102] The four horizontal connecting rod unit groups 500 respectively include a first long connecting rod 501, a second long connecting rod 511, a third long connecting rod 521, and a fourth long connecting rod 531;

[0103] The two connecting unit groups 400 respectively include a first short connecting rod 401 and a first short connecting rod level 402, a second short connecting rod 411 and a second short connecting rod level 412;

[0104] A first precision fine-tuning reverse thread bolt and a third precision fine-tuning reverse thread bolt 326 are provided between the first long connecting rod 501, the third long connecting rod 521 and the first short connecting rod 401;

[0105] A second precision fine-tuning reverse thread bolt and a fourth precision fine-tuning reverse thread bolt are provided between the second long connecting rod 511, the fourth long connecting rod 531 and the second short connecting rod 411.

[0106] In some embodiments, the first fixing frame 301, the second fixing frame 311, the third fixing frame 321 and the fourth fixing frame 331 are all vertically arranged rectangular frames, including two vertically arranged vertical rods, an upper horizontal rod arranged at the upper end of the two vertical rods and a lower horizontal rod arranged at the lower end of the two vertical rods;

[0107] The first fixed frame level 303, the second fixed frame level 313, the third fixed frame level 323, and the fourth fixed frame level 333 are respectively installed between the upper and lower crossbars of the corresponding first fixed frame 301, second fixed frame 311, third fixed frame 321, or fourth fixed frame 331.

[0108] In some embodiments, the upper and lower crossbars of the first fixing frame 301, the second fixing frame 311, the third fixing frame 321 and the fourth fixing frame 331 are respectively provided with a first elongated hole, a second elongated hole, a third elongated hole 322 and a fourth elongated hole;

[0109] Each upper crossbar's first long hole, second long hole, third long hole 322, and fourth long hole are respectively connected to the corresponding first long connecting rod 501, the corresponding second long connecting rod 511, the corresponding third long connecting rod 521, the corresponding fourth long connecting rod 531, the corresponding first short connecting rod 401, or the corresponding second short connecting rod 411 by setting a first sliding bolt and a first temporary fixing nut, a second sliding bolt and a second temporary fixing nut, a third sliding bolt and a third temporary fixing nut, and a fourth sliding bolt and a fourth temporary fixing nut, respectively, to form a lockable moving pair connection.

[0110] The first, second, third, and fourth long holes of each horizontal bar are fitted onto the anchor bolts 202 at the corresponding positions on the anchor bolt cage 200 and secured by the corresponding anchor bolt nuts 203.

[0111] In practical applications, the dimensions of the first, second, third, and fourth elongated holes of the upper and lower crossbars are all determined based on the dimensions of the anchor bolt 202.

[0112] In some embodiments, each rectangular frame is supported by a rigid material;

[0113] The hard material is steel or aluminum alloy;

[0114] The first vertical fixing rod 601, the second vertical fixing rod 611, the third vertical fixing rod 621, and the fourth vertical fixing rod 631 are all made of thick steel bars or steel pipes;

[0115] Both the first short connecting rod 401 and the second short connecting rod 411 are made of hard material, and have an upward or downward protruding arc structure at the intersection.

[0116] In practical applications, the first short connecting rod 401 and the second short connecting rod 411 are respectively provided with an upward or downward protruding arc structure at the intersection position to avoid mutual collision.

[0117] In some embodiments, the ends of the first long connecting rod 501 connected to the first vertical fixing rod 601, the ends of the second long connecting rod 511 connected to the second vertical fixing rod 611, the ends of the third long connecting rod 521 connected to the third vertical fixing rod 621, and the ends of the fourth long connecting rod 531 connected to the fourth vertical fixing rod 631 are all provided with rings that can be inserted into the first vertical fixing rod 601, the second vertical fixing rod 611, the third vertical fixing rod 621, or the fourth vertical fixing rod 631.

[0118] The first vertical fixing rod 601, the second vertical fixing rod 611, the third vertical fixing rod 621 and the fourth vertical fixing rod 631 are all provided with external threads near their upper ends;

[0119] The first long connecting rod 501, the second long connecting rod 511, the third long connecting rod 521, and the fourth long connecting rod 531 are all fixed by fitting corresponding rings onto the corresponding first vertical fixing rod 601, second vertical fixing rod 611, third vertical fixing rod 621, or fourth vertical fixing rod 631, and respectively setting a first fixing nut, a second fixing nut, a third fixing nut 522, and a fourth fixing nut on the corresponding external threads.

[0120] In some embodiments, the anchor cage 200 includes an annular upper anchor plate 201 and a lower anchor plate 204 disposed below the upper anchor plate 201, parallel to and identical to the upper anchor plate 201.

[0121] The upper anchor plate 201 and the lower anchor plate 204 are connected by multiple anchor bolts 202;

[0122] Multiple anchor bolts 202 are arranged in two layers along the radial direction of the upper anchor plate 201 and the lower anchor plate 204. Each layer is evenly distributed around the axis of the upper anchor plate 201 and the lower anchor plate 204, and the two layers of anchor bolts 202 correspond one-to-one.

[0123] Each pair of corresponding anchor bolts 202 is located in the radial direction of the same upper anchor plate 201 and lower anchor plate 204;

[0124] The upper anchor plate 201 and the lower anchor plate 204 are provided with mounting holes for each anchor bolt 202;

[0125] Each anchor bolt 202 has external threads at both ends. The anchor bolt is fixed to the corresponding upper anchor plate 201 and the corresponding lower anchor plate 204 by passing the external threads through the corresponding mounting holes and setting the upper anchor bolt nut 203 and the lower anchor bolt nut 205 respectively.

[0126] This invention also provides a method for using a system for precise leveling during the construction of wind turbine foundation anchor cages, the steps of which are as follows:

[0127] Step 1: Based on the dimensions of the anchor cage 200 and the dimensions of the foundation pit for the wind turbine foundation 100 to be poured, fabricate all external fixing facility unit groups 600, all horizontal connecting rod unit groups 500, all connector unit groups 400, and all anchor plate fixing unit groups 300.

[0128] Step 2: During the installation of the anchor cage 200, before tightening the anchor nuts 203 above the upper anchor plate 201, set up all the fixing frames and fix all the fixing frames by tightening the anchor nuts 203 above the upper anchor plate 201.

[0129] Step 3: Install a level on each fixed bracket;

[0130] Step 4: On the outside of the wind turbine foundation 100, pour a concrete foundation aligned with each fixed frame in the radial direction of the anchor cage 200, and install a vertical fixing rod on each concrete foundation.

[0131] Step 5: Fix one end of all long connecting rods to the corresponding vertical fixing rods, and connect the other end of all long connecting rods to the corresponding fixing brackets to form a lockable movable pair connection.

[0132] Step 6: Install all the short connecting rods, and connect both ends of each short connecting rod to the corresponding two fixed brackets to form a lockable movable pair connection;

[0133] Step 7: Install precision fine-tuning reverse thread bolts between the long and short connecting rods of each fixing bracket;

[0134] Step 8: Use a level to check the horizontal status of the anchor cage 200 and the upper anchor plate 201 to ensure that they are within the horizontal error range, and check all levels to ensure that they are in a horizontal state;

[0135] Step 9: Pour the wind turbine foundation 100 mm while monitoring all fixed frame levels and all short connecting rod levels.

[0136] If any fixed-frame level or any short-link level deviates, loosen the lockable sliding joint connection of the corresponding long link or the corresponding short link, and adjust it using the corresponding precision fine-tuning reverse thread bolt;

[0137] Step 10: After the wind turbine foundation 100 has hardened to the required strength, remove all the connecting component unit groups 400, horizontal connecting rod unit groups 500, anchor plate fixing unit groups 300 and external fixing facility unit groups 600 in sequence; then tighten the upper anchor bolt nuts 203 on the anchor bolt cage 200 corresponding to each anchor plate fixing unit group 300.

[0138] In some embodiments, the installation process of the anchor cage 200 is as follows:

[0139] Step 2.1: Install all anchor bolts 202 on the lower anchor plate 204 and secure them with lower anchor bolt nuts 205;

[0140] Step 2.2: Install anchor plates 201 at the other end of all anchor bolts 202;

[0141] Step 2.3: Install all upper anchor bolt nuts 203, only perform initial tightening;

[0142] Step 2.4 Level the upper anchor plate 201 by using a leveling instrument to accurately level the upper anchor plate 201.

[0143] Step 2.5: Tighten all the upper anchor bolt nuts 205;

[0144] In step 3, each level is adjusted to a horizontal state before being installed on the corresponding level.

[0145] Since the anchor cage 200 and the upper anchor plate 201 are already leveled, the level of the fixing frame needs to be adjusted to a horizontal state.

[0146] In some embodiments, in step 9, when the first fixed frame level 303, the third fixed frame level 323, and the first short connecting rod level 402 show a shift towards the third concrete foundation 621, the second fixed frame level 313, the fourth fixed frame level 333, and the second short connecting rod level 412 in another direction show a horizontal position, indicating that the anchor bolt cage 200 and the upper anchor plate 201 have shifted towards the third concrete foundation 621, but no shift has occurred in the vertical direction of the line connecting the third concrete foundation 621 to the first concrete foundation 601;

[0147] The adjustment method is as follows:

[0148] Loosen the lockable movable joint connection between the first fixed bracket 301 and the first long connecting rod 501.

[0149] and the lockable movable joint connection between the third fixed frame 321 and the third long connecting rod 521,

[0150] Adjust the first and third precision fine-tuning reverse thread screws 326.

[0151] The process continues until the first fixed frame level 303, the third fixed frame level 323, and the first short connecting rod level 402 return to the horizontal position.

[0152] Then relock the lockable movable joint connection between the first fixed bracket 301 and the first long connecting rod 501.

[0153] And a lockable movable pair connection between the third fixed bracket 321 and the third long connecting rod 521.

[0154] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A system for precise leveling during the construction of wind turbine foundation anchor cages; characterized in that, Used to adjust the position of the anchor cage and its upper anchor plate relative to the horizontal plane, which are installed in the foundation pit; the foundation pit is used to pour the foundation for the wind turbine. This includes at least 2n groups of external fixed facility units that are set around the foundation pit and evenly distributed around the axis of the anchor bolt cage; where n is a natural number of 2 or more. And, on the upper anchor plate of the anchor cage, there are 2n or more sets of anchor plate fixing units evenly distributed around the axis of the anchor cage. All anchor plate fixing unit groups and all external fixing facility unit groups correspond one-to-one, and each anchor plate fixing unit group and the corresponding external fixing facility unit group are set in the same radial direction of the anchor bolt cage. Each anchor plate fixing unit group and the corresponding external fixing facility unit group are provided with a horizontal connecting rod unit group; In all anchor plate fixing unit groups, there is a connecting unit group between two anchor plate fixing unit groups located in the same diameter direction of the anchor bolt cage. The four anchor plate fixing unit groups respectively include a first fixing frame and a first fixing frame level, a second fixing frame and a second fixing frame level, a third fixing frame and a third fixing frame level, and a fourth fixing frame and a fourth fixing frame level; The four horizontal connecting rod unit groups respectively include a first long connecting rod, a second long connecting rod, a third long connecting rod, and a fourth long connecting rod; The two connecting unit groups respectively include a first short connecting rod and a first short connecting rod level, a second short connecting rod and a second short connecting rod level; The first, second, third, and fourth fixing frames are all vertically arranged rectangular frames, including two vertically arranged vertical bars, an upper horizontal bar set at the top of the two vertical bars, and a lower horizontal bar set at the bottom of the two vertical bars; The upper and lower crossbars of the first, second, third, and fourth fixing frames are respectively provided with a first elongated hole, a second elongated hole, a third elongated hole, and a fourth elongated hole; Each upper crossbar's first, second, third, and fourth long holes are respectively connected to the corresponding first, second, third, fourth, first, or second short connecting rod by setting a first sliding bolt and a first temporary fixing nut, a second sliding bolt and a second temporary fixing nut, a third sliding bolt and a third temporary fixing nut, and a fourth sliding bolt and a fourth temporary fixing nut, to form a lockable moving pair connection. The first, second, third, and fourth long holes of each horizontal bar are fitted onto the anchor bolts at the corresponding positions in the anchor bolt cage and tightened by the corresponding anchor bolt nuts. Precision micro-adjustment reverse thread bolts are provided between the short connecting rod and the long connecting rod, which are connected to the same fixed frame in a lockable sliding joint. Each precision fine-tuning reverse thread bolt includes two coaxially arranged external threads with opposite directions of rotation, and a screwing part that is connected to the two external threads respectively through an internal thread; Each precision fine-tuning reverse thread bolt has two external threads that are fixedly connected to the corresponding short connecting rod and the corresponding long connecting rod, respectively.

2. The system for precise leveling during the construction of wind turbine foundation anchor cages according to claim 1, characterized in that, Includes 4 external fixed facility unit groups; The four external fixed facility units include a first concrete foundation and a first vertical fixing rod, a second concrete foundation and a second vertical fixing rod, a third concrete foundation and a third vertical fixing rod, and a fourth concrete foundation and a fourth vertical fixing rod, respectively. A first precision micro-adjustment reverse thread bolt and a third precision micro-adjustment reverse thread bolt are provided between the first long connecting rod, the third long connecting rod and the first short connecting rod; A second precision fine-tuning reverse thread bolt and a fourth precision fine-tuning reverse thread bolt are provided between the second long connecting rod, the fourth long connecting rod and the second short connecting rod.

3. The system for precise leveling during the construction of wind turbine foundation anchor cages according to claim 2, characterized in that, The first fixed frame level, the second fixed frame level, the third fixed frame level, and the fourth fixed frame level are all respectively installed between the upper and lower crossbars of the corresponding first fixed frame, second fixed frame, third fixed frame, or fourth fixed frame.

4. The system for precise leveling during the construction of wind turbine foundation anchor cages according to claim 3, characterized in that, Each rectangular frame is supported by a sturdy material; The hard material is steel or aluminum alloy; The first vertical fixing rod, the second vertical fixing rod, the third vertical fixing rod, and the fourth vertical fixing rod are all made of thick steel bars or steel pipes; Both the first and second short connecting rods are made of rigid materials, and have an upward or downward protruding arc structure at their intersections.

5. The system for precise leveling during the construction of wind turbine foundation anchor cages according to claim 4, characterized in that, The ends of the first long connecting rod connected to the first vertical fixing rod, the ends of the second long connecting rod connected to the second vertical fixing rod, the ends of the third long connecting rod connected to the third vertical fixing rod, and the ends of the fourth long connecting rod connected to the fourth vertical fixing rod are all provided with rings that can be inserted into the first vertical fixing rod, the second vertical fixing rod, the third vertical fixing rod, or the fourth vertical fixing rod. The first vertical fixing rod, the second vertical fixing rod, the third vertical fixing rod, and the fourth vertical fixing rod are all provided with external threads near their upper ends; The first, second, third, and fourth long connecting rods are all fixed by fitting corresponding rings onto the corresponding first, second, third, or fourth vertical fixing rods and respectively setting a first fixing nut, a second fixing nut, a third fixing nut, and a fourth fixing nut on the corresponding external threads.

6. A method for using a system for precise leveling during the construction of wind turbine foundation anchor cages, characterized in that, The system for precise leveling during the construction of wind turbine foundation anchor cages, as described in claim 5, comprises the following steps: Step 1: Based on the dimensions of the anchor cage and the dimensions of the foundation pit for the wind turbine foundation to be poured, fabricate all external fixing facility unit groups, all horizontal connecting rod unit groups, all connector unit groups, and all anchor plate fixing unit groups. Step 2: During the installation of the anchor cage, before tightening the anchor nuts above the upper anchor plate, set up all the fixing frames and fix all the fixing frames by tightening the anchor nuts above the upper anchor plate. Step 3: Install a level on each fixed bracket; Step 4: On the outside of the wind turbine foundation, pour concrete foundations aligned with the radial direction of each anchor cage, and install vertical fixing rods on each concrete foundation. Step 5: Fix one end of all long connecting rods to the corresponding vertical fixing rods, and connect the other end of all long connecting rods to the corresponding fixing brackets to form a lockable movable pair connection. Step 6: Install all the short connecting rods, and connect both ends of each short connecting rod to the corresponding two fixed brackets to form a lockable movable pair connection; Step 7: Install precision fine-tuning reverse thread bolts between the long and short connecting rods of each fixing bracket; Step 8: Use a level to check the horizontal status of the anchor cage and the upper anchor plate to ensure that they are within the horizontal error range, and check all levels to ensure that they are horizontal. Step 9: While pouring the wind turbine foundation, monitor all fixed frame levels and all short connecting rod levels. If any fixed-frame level or any short-link level deviates, loosen the lockable sliding joint connection of the corresponding long link or the corresponding short link, and adjust it using the corresponding precision fine-tuning reverse thread bolt; Step 10: After the wind turbine foundation has hardened to the required strength, remove all the connecting parts unit groups, horizontal connecting rod unit groups, anchor plate fixing unit groups, and external fixing facility unit groups in sequence; then tighten the upper anchor bolt nuts on the anchor bolt cage corresponding to each anchor plate fixing unit group.

7. The method of using the system for precise leveling during the construction of wind turbine foundation anchor cages according to claim 6, characterized in that, In step 9, when the first fixed frame level, the third fixed frame level, and the first short connecting rod level show a shift toward the third concrete foundation, the second fixed frame level, the fourth fixed frame level, and the second short connecting rod level in the other direction show a horizontal position, indicating that the anchor bolt cage and the upper anchor plate have shifted toward the third concrete foundation, but have not shifted in the perpendicular direction to the line connecting the third concrete foundation and the first concrete foundation. The adjustment method is as follows: Loosen the lockable movable joint connection between the first fixed bracket and the first long connecting rod. And the lockable movable joint connection between the third fixed frame and the third long connecting rod, Adjust the first and third precision fine-tuning reverse thread screws. The process continues until the first fixed-frame level, the third fixed-frame level, and the first short connecting rod level return to their horizontal positions. Then relock the lockable movable joint connection between the first fixed frame and the first long connecting rod. And a lockable movable joint connection between the third fixed frame and the third long connecting rod.

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