Wind driven generator foundation ring reinforcing device and reinforcing method

Abstract

The invention relates to the technical field of wind power generation equipment, in particular to a wind driven generator foundation ring reinforcing device and method.The device comprises a reinforcing table arranged at the top of an original concrete foundation, a conical table is arranged in a conical cavity between the reinforcing table and a tower drum, and a pre-pressing component is arranged at the top of the reinforcing table; the connecting cylinder is connected with the first supporting seat; the pressing rod penetrates through the connecting cylinder, and the lower end of the pressing rod is provided with a pressing block for extruding the conical table; the pre-tightening spring is pressed between the connecting cylinder and the pressing block and is arranged on the pressing rod in a sleeving manner; the limiting column is arranged at the upper end of the pressing rod and provided with a plurality of tooth grooves in the axial direction, the lower sides of the tooth grooves are perpendicular to the axis of the limiting column, and the upper sides of the tooth grooves are of a wedge-shaped structure; a second supporting seat is fixedly arranged at the top of the reinforcing table, and the limiting block is elastically arranged on the second supporting seat and provided with limiting teeth matched with the tooth grooves so as to limit upward movement of the limiting column. The conical table is prevented from being abraded quickly, and the service life of the conical table is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation equipment, and in particular to a wind power generator foundation ring reinforcement device and reinforcement method. Background Art

[0002] The lower end of the foundation ring is buried inside the concrete foundation, and the upper end of the foundation ring is connected to the bottom of the wind turbine tower to bear the load from the tower. Due to the limitation of the structure, the stress load at the contact point between the foundation ring and the concrete foundation is relatively concentrated. During the operation of the wind turbine, the wind load acts repeatedly, so the wind load wear effect on the contact area between the foundation ring and the concrete is relatively serious. After wear, a gap will appear between the two, which will cause the amplitude of the tower to increase, and then accelerate the wear of the concrete. In the long run, this will cause the connection strength between the tower and the foundation to become lower and lower, and even the foundation will collapse and be damaged.

[0003] In the prior art, some solutions have been proposed for the above-mentioned problems. For example, the patent document with the publication number "CN117364828A" provides a wind turbine foundation reinforcement device acting on the original foundation concrete of the wind turbine. By setting up components such as a conical extrusion component and a prestressed spring, under the action of prestress, the conical extrusion component will move downward to compensate for the gap between the tower and the concrete, thereby reducing the amplitude of the tower. However, the downward pressure of the conical extrusion component is only provided by the elastic force of the prestressed spring. In the process of the tower being subjected to the lateral vibration of the wind load, the tower will repeatedly squeeze the conical extrusion component. When the wind load is large, the upward component of the wind load along the conical surface will easily cause the conical extrusion component to move upward, resulting in extremely fast wear between the tower and the inner side of the conical extrusion component and between the outer side of the conical extrusion component and the concrete, thereby greatly reducing the service life of the conical extrusion component. Summary of the invention

[0004] The object of the present invention is to provide a wind turbine foundation ring reinforcement device and reinforcement method to solve the above-mentioned defects of the prior art.

[0005] The present invention is achieved through the following technical solutions:

[0006] A wind turbine foundation ring reinforcement device includes a reinforcement platform arranged on the top of the original concrete foundation, a conical cavity is arranged between the inner top of the reinforcement platform and the tower, a conical platform matching with the conical cavity is arranged in the conical cavity, and a pre-pressing component for squeezing the conical platform is arranged on the top of the reinforcement platform, and the pre-pressing component includes:

[0007] A first support seat, fixedly connected to the reinforcement platform;

[0008] A connecting tube connected to the first supporting seat;

[0009] A pressing rod is inserted into the connecting tube and has a pressing block at the lower end for pressing the conical platform;

[0010] A preload spring is press-fitted between the connecting tube and the pressing block and sleeved on the pressing rod;

[0011] A limiting column is arranged at the upper end of the pressure rod and is provided with a plurality of tooth grooves along the axial direction, the lower side of the tooth grooves is perpendicular to the axis of the limiting column, and the upper side of the tooth grooves is a wedge-shaped structure; and

[0012] A limiting block is fixedly provided with a second supporting seat on the top of the reinforcing platform. The limiting block is elastically arranged on the second supporting seat and is provided with limiting teeth cooperating with the tooth grooves to limit the upward movement of the limiting column after the limiting column moves downward.

[0013] Optionally, a support platform is provided on the outer side of the bottom of the original concrete foundation, a support ring is provided on the outer side of the tower, a number of diagonal braces are fixedly connected between the support ring and the support platform, a number of shock-absorbing components are provided on the support ring along the circumferential direction, the shock-absorbing components include buffer springs, dampers and support blocks for supporting the tower, and the buffer springs and dampers are fixedly connected between the support blocks and the support rings.

[0014] Optionally, the shock absorbing component further includes a universal ball, which is rotatably embedded in the support ring, and the buffer spring and the damper are fixedly connected between the universal ball and the support block.

[0015] Optionally, a guide rod is passed through the interior of the universal ball, one end of the guide rod is fixedly connected to the support block, and the other end of the guide rod is provided with a blocking piece.

[0016] Optionally, the connecting tube is connected to the first supporting seat via threads.

[0017] Optionally, the limit block is connected to a first stop block, the stop block is connected to a guide rod, the guide rod is passed through the second support seat and is provided with a second stop block at the end away from the first stop block, the guide rod sleeve is provided with a return spring, one end of the return spring is against the second support seat, and the other end of the return spring is against the second stop block.

[0018] Optionally, the reinforcement platform comprises:

[0019] A reinforced box with an open top and reinforced concrete inside;

[0020] A top cover, provided at the opening of the reinforcement box; and

[0021] A plurality of anchor bolts have lower ends which penetrate into the original concrete foundation, and upper ends which extend out of the top cover and are welded with reinforcing nuts.

[0022] Optionally, the support platform comprises:

[0023] An open-top support box with supporting concrete inside;

[0024] A box cover is arranged at the open opening of the supporting box;

[0025] A number of transverse bolts, one end of which is inserted into the original concrete foundation, and the other end of which extends out of the side of the support box and is welded with a reinforcing nut; and

[0026] A plurality of vertical bolts have their lower ends welded to the bottom of the support box and the other ends extending out of the box cover and welded with reinforcing nuts.

[0027] The present invention also provides a method for reinforcing the foundation ring of a wind turbine generator, which adopts any of the wind turbine generator foundation ring reinforcement devices described above, arranges a reinforcement platform on the top surface of the original concrete foundation, installs a pre-tensioning component on the reinforcement platform, and utilizes the elastic force of the pre-tensioning spring to cause the pressure block to press the conical platform downward, so that the conical platform fills the conical cavity between the inner top of the reinforcement platform and the tower. After a gap is generated between the tower and the reinforcement platform due to wear, the conical platform can be further moved downward under the action of the pre-tensioning spring to compensate for the gap between the tower and the reinforcement platform. At the same time, the limiting teeth on the limiting block cooperate with the tooth grooves on the limiting column. After the limiting column moves downward, the upward movement of the limiting column is limited, thereby limiting the upward movement of the conical platform.

[0028] The technical solution of the present invention has at least the following advantages and beneficial effects: in the present invention, the pressing block presses the conical platform downward under the action of the preload spring, so that it fills the conical cavity between the inner top of the reinforcing platform and the tower; after a gap is generated between the tower and the reinforcing platform due to wear, the conical platform can move further downward under the action of the preload spring to compensate for the gap between the tower and the reinforcing platform; at the same time, the limiting teeth on the limiting block cooperate with the tooth grooves on the limiting column, and since the upper side of the tooth grooves is a wedge-shaped structure, the limiting column can move downward to squeeze the limiting block open, that is, the limiting column It can move downward smoothly (that is, it does not affect the pre-tightening spring driving the pressure block to further press the conical platform downward), and the lower side of the tooth groove is perpendicular to the axis of the limit column. When the limit column has a tendency to move upward, the force applied to the limit block is parallel to the axis of the limit column and upward, and the limit block cannot be squeezed open. Therefore, after the limit column moves downward (that is, after compensating for the gap between the tower and the reinforcement platform), the limit block can limit the upward movement of the limit column, thereby limiting the upward movement of the conical platform, which avoids the rapid wear of the conical platform, greatly prolongs the service life of the conical platform, and solves the defects of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1A schematic structural diagram of a wind turbine foundation ring reinforcement device provided in Example 1;

[0031] Figure 2 for Figure 1 A magnified image of point A;

[0032] Figure 3 It is a schematic diagram of the coordination structure between the limiting column and the limiting block;

[0033] Figure 4 A schematic structural diagram of a wind turbine foundation ring reinforcement device provided in Example 2;

[0034] Figure 5 for Figure 4 The enlarged view of point B;

[0035] Figure 6 for Figure 4 Enlarged view of point C;

[0036] Icons: 1-original concrete foundation, 2-foundation ring, 3-tower, 4-reinforcement platform, 401-reinforcement box, 402-top cover, 403-anchor bolt, 5-conical platform, 6-pre-tightening component, 601-first support seat, 602-connecting tube, 603-pressure rod, 604-pre-tightening spring, 605-pressure block, 606-limiting column, 607-limiting block, 608-second support seat, 609-first block, 610-guide rod, 611-reset spring, 612-second block, 7-shock absorbing component, 701-buffer spring, 702-support block, 703-guide rod, 704-universal ball, 705-block, 8-support platform, 801-support box, 802-box cover, 803-horizontal bolt, 804-vertical bolt, 9-diagonal brace, 10-support ring. DETAILED DESCRIPTION

[0037] Example 1

[0038] refer to Figure 1-Figure 3 A wind turbine foundation ring 2 reinforcement device includes a reinforcement platform 4 arranged on the top of the original concrete foundation 1, a conical cavity is arranged between the inner top of the reinforcement platform 4 and the tower 3, in this embodiment, the reinforcement platform 4 includes a reinforcement box 401, a top cover 402 and a plurality of anchor bolts 403, the top cover 402 is arranged at the open part of the reinforcement box 401, concrete is poured inside the reinforcement box 401 to form reinforced concrete, the lower end of the anchor bolt 403 is penetrated inside the original concrete foundation 1 (it is easy to understand that the corresponding hole of the anchor bolt 403 should be drilled on the original concrete foundation 1), and the upper end of the anchor bolt 403 extends out of the top cover 402 and is welded with a reinforcement nut. Such a configuration can greatly improve the structural strength of the reinforcement platform 4. Further, the upper end of the anchor bolt 403 is welded to the top cover 402.

[0039] A conical platform 5 is provided in the conical cavity to match it, and a pre-pressing component 6 for squeezing the conical platform 5 is provided on the top of the reinforcing platform 4. The pre-pressing component 6 includes a first support seat 601, a connecting tube 602, a pressure rod 603, a pre-tensioning spring 604, a limiting column 606 and a limiting block 607.

[0040] The first support seat 601 is fixedly connected to the reinforcement platform 4 (for example, welded or bolted), and the connecting tube 602 is connected to the first support seat 601. In this embodiment, the connecting tube 602 is connected to the first support seat 601 by threads. Such an arrangement enables the preload force of the preload spring 604 to be actively adjusted by twisting the connecting tube 602.

[0041] The pressure rod 603 is passed through the inside of the connecting tube 602, and a pressure block 605 for squeezing the conical platform 5 is provided at the lower end. The preload spring 604 is pressed between the connecting tube 602 and the pressure block 605 and is sleeved on the pressure rod 603. In this way, under the action of the preload spring 604, the pressure block 605 squeezes the conical platform 5 downward to fill the conical cavity between the inner top of the reinforcing platform 4 and the tower 3.

[0042] The limiting column 606 is arranged at the upper end of the pressure rod 603 and is provided with a plurality of tooth grooves along the axial direction. The lower side of the tooth groove is perpendicular to the axis of the limiting column 606, and the upper side of the tooth groove is a wedge-shaped structure, that is, the upper side of the tooth groove is at a certain angle relative to the lower side of the tooth groove, that is, if the lower side of the tooth groove is regarded as a plane, the upper side of the tooth groove is an inclined surface. A second support seat 608 is fixedly provided on the top of the reinforcing platform 4, and the limiting block 607 is elastically arranged on the second support seat 608 and is provided with limiting teeth that cooperate with the tooth groove.

[0043] It is worth mentioning that, since the upper side of the tooth groove is a wedge-shaped structure, the limit column 606 can move downward to squeeze the limit block 607, that is, the limit column 606 can move downward smoothly (that is, it does not affect the preload spring 604 to drive the pressure block 605 to further press the conical platform 5 downward to compensate for the gap), and the lower side of the tooth groove is perpendicular to the axis of the limit column 606. When the limit column 606 has a tendency to move upward, the force applied to the limit block 607 is parallel to the axis of the limit column 606 and is upward, and the limit block 607 cannot be squeezed open. Therefore, after the limit column 606 moves downward (that is, after compensating for the gap between the tower 3 and the reinforcement platform 4), the limit block 607 can limit the upward movement of the limit column 606, thereby limiting the upward movement of the conical platform 5, that is, avoiding the rapid wear of the conical platform 5, greatly extending the service life of the conical platform 5, and solving the defects of the prior art.

[0044] As an option, the manner in which the limit block 607 of this embodiment is elastically arranged on the second support seat 608 is as follows: the limit block 607 is connected to the first stopper 609, the stopper is connected to the guide rod 610, the guide rod 610 is penetrated on the second support seat 608 and is provided with a second stopper 612 at one end away from the first stopper 609, the guide rod 610 is sleeved with a return spring 611, one end of the return spring 611 abuts against the second support seat 608, and the other end of the return spring 611 abuts against the second stopper 612. Of course, in other embodiments, the limit block 607 elastically arranged on the second support seat 608 can also be realized by other methods, for example, a guide cylinder is arranged on the second support seat 608, the limit block 607 is slidably arranged in the guide cylinder, and the return spring 611 is fixedly connected between the limit block 607 and the second support seat 608.

[0045] Example 2

[0046] refer to Figure 4-Figure 6 This embodiment is further improved on the basis of the embodiment 1. In this embodiment, a support platform 8 is provided on the outer side of the bottom of the original concrete foundation 1. The support platform 8 includes a support box 801, a box cover 802, a plurality of transverse bolts 803 and a plurality of vertical bolts 804. The top of the support box 801 is open, and the box cover 802 is arranged at the open part of the support box 801. Concrete is poured inside the support box 801 to form supporting concrete. One end of the transverse bolt 803 is inserted into the inside of the original concrete foundation 1 (it is easy to understand that the corresponding hole of the transverse bolt 803 should be drilled on the original concrete foundation 1 first), and the other end of the transverse bolt 803 extends out of the side of the support box 801 and is welded with a reinforcing nut. The lower end of the vertical bolt 804 is welded to the bottom of the support box 801, and the other end extends out of the box cover 802 and is welded with a reinforcing nut. Such an arrangement can greatly improve the structural strength of the support platform 8. Further, the side of the support box 801 is welded with the transverse bolt 803, and the box cover 802 is welded with the vertical bolt 804.

[0047] A support ring 10 is provided on the outside of the tower 3. A plurality of diagonal braces 9 are fixedly connected (for example, welded or bolted) between the support ring 10 and the support platform 8. A plurality of shock-absorbing components 7 are provided on the support ring 10 along the circumferential direction. The shock-absorbing components 7 include a buffer spring 701, a damper (not shown) and a support block 702 for supporting the tower 3. The buffer spring 701 and the damper are fixedly connected between the support block 702 and the support ring 10.

[0048] It is worth noting that, based on the above-mentioned conical platform 5 provided at the connection of the tower 3, the conical platform 5 will limit the lateral displacement of the bottom of the tower 3, which will cause the vibration of the upper and middle parts of the tower 3 to increase. The vibration-damping component provided in this embodiment absorbs the vibration energy of the tower 3, limits the vibration amplitude of the tower 3, and solves the above-mentioned problem well.

[0049] The shock absorbing component 7 of this embodiment also includes a universal ball 704, which is rotatably embedded in the support ring 10, and the buffer spring 701 and the damper are fixedly connected between the universal ball 704 and the support block 702. This arrangement enables the support block 702 to rotate at any angle within a certain range, better adapting to the deflection of the tower 3, that is, better supporting it during the deflection of the tower 3. Further, a guide rod 703 is inserted into the universal ball 704, one end of the guide rod 703 is fixedly connected to the support block 702, and the other end of the guide rod 703 is provided with a baffle 705. This arrangement uses the guide rod 703 to guide the expansion and contraction of the buffer spring 701, making the shock absorbing component 7 more reliable.

[0050] Example 3

[0051] The present embodiment provides a method for reinforcing a foundation ring 2 of a wind turbine, and adopts the wind turbine foundation ring 2 reinforcement device provided in Embodiment 1 (it is easy to understand that in other embodiments, the wind turbine foundation ring 2 reinforcement device provided in Embodiment 2 can also be adopted). The method is to set a reinforcing platform 4 on the top surface of the original concrete foundation 1, and then install a pre-tightening component 6 on the reinforcing platform 4. The elastic force of the pre-tightening spring 604 is used to make the pressing block 605 press the conical platform 5 downward, so that the conical platform 5 fills the conical cavity between the inner top of the reinforcing platform 4 and the tower 3. After a gap is generated between the tower 3 and the reinforcing platform 4 due to wear, the conical platform 5 can be further moved downward under the action of the pre-tightening spring 604 to compensate for the gap between the tower 3 and the reinforcing platform 4.

[0052] At the same time, by utilizing the cooperation between the limiting teeth on the limiting block 607 and the tooth grooves on the limiting column 606, the limiting column 606 can move downward but cannot move upward, that is, after the limiting column 606 moves downward (that is, after compensating for the gap between the tower 3 and the reinforcing platform 4), the limiting block 607 can limit the upward movement of the conical platform 5, thereby avoiding the conical platform 5 from wearing out quickly, greatly extending the service life of the conical platform 5, and solving the defects of the prior art.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wind turbine foundation ring reinforcement device, comprising a reinforcement platform arranged on the top of the original concrete foundation, a conical cavity is arranged between the inner top of the reinforcement platform and the tower, a conical platform matching with the conical cavity is arranged in the conical cavity, and a pre-compression component for squeezing the conical platform is arranged on the top of the reinforcement platform, characterized in that: Pre-loaded components include: A first support seat, fixedly connected to the reinforcement platform; A connecting tube connected to the first supporting seat; A pressing rod is inserted into the connecting tube and has a pressing block at the lower end for pressing the conical platform; A preload spring is press-fitted between the connecting tube and the pressing block and sleeved on the pressing rod; A limiting column is arranged at the upper end of the pressure rod and is provided with a plurality of tooth grooves along the axial direction, the lower side of the tooth grooves is perpendicular to the axis of the limiting column, and the upper side of the tooth grooves is a wedge-shaped structure; and A limiting block is fixedly provided with a second supporting seat on the top of the reinforcing platform. The limiting block is elastically arranged on the second supporting seat and is provided with limiting teeth cooperating with the tooth grooves to limit the upward movement of the limiting column after the limiting column moves downward.

2. The wind turbine foundation ring reinforcement device according to claim 1, characterized in that: A support platform is provided on the outer side of the bottom of the original concrete foundation, a support ring is provided on the outer side of the tower, a number of diagonal braces are fixedly connected between the support ring and the support platform, a number of shock-absorbing components are provided on the support ring along the circumferential direction, the shock-absorbing components include buffer springs, dampers and support blocks for supporting the tower, and the buffer springs and dampers are fixedly connected between the support blocks and the support rings.

3. The wind turbine foundation ring reinforcement device according to claim 2, characterized in that: The shock absorbing component also includes a universal ball, which is rotatably embedded in the support ring, and the buffer spring and the damper are fixedly connected between the universal ball and the support block.

4. The wind turbine foundation ring reinforcement device according to claim 3, characterized in that: A guide rod is inserted into the universal ball, one end of the guide rod is fixedly connected to the support block, and the other end of the guide rod is provided with a blocking piece.

5. The wind turbine foundation ring reinforcement device according to any one of claims 1 to 4, characterized in that: The connecting tube is connected to the first supporting seat via threads.

6. The wind turbine foundation ring reinforcement device according to any one of claims 1 to 4, characterized in that: The limit block is connected to the first stopper, the stopper is connected to the guide rod, the guide rod is passed through the second support seat and is provided with a second stopper at the end away from the first stopper, the guide rod sleeve is provided with a return spring, one end of the return spring is against the second support seat, and the other end of the return spring is against the second stopper.

7. The wind turbine foundation ring reinforcement device according to any one of claims 1 to 4, characterized in that: The reinforcement platform comprises: A reinforced box with an open top and reinforced concrete inside; A top cover, provided at the opening of the reinforcement box; and A plurality of anchor bolts have lower ends which penetrate into the original concrete foundation, and upper ends which extend out of the top cover and are welded with reinforcing nuts.

8. The wind turbine foundation ring reinforcement device according to any one of claims 1 to 4, characterized in that: The support platform comprises: An open-top support box with supporting concrete inside; A box cover is arranged at the open opening of the supporting box; A number of transverse bolts, one end of which is inserted into the original concrete foundation, and the other end of which extends out of the side of the support box and is welded with a reinforcing nut; and A plurality of vertical bolts have their lower ends welded to the bottom of the support box and the other ends extending out of the box cover and welded with reinforcing nuts.

9. A method for reinforcing a foundation ring of a wind turbine generator, using the wind turbine generator foundation ring reinforcement device according to any one of claims 1 to 8, characterized in that: A reinforcement platform is set on the top surface of the original concrete foundation, and a pre-tensioning component is installed on the reinforcement platform. The elastic force of the pre-tensioning spring is used to squeeze the conical platform downward, so that the conical platform fills the conical cavity between the inner top of the reinforcement platform and the tower. After a gap is generated between the tower and the reinforcement platform due to wear, the conical platform can be further moved downward under the action of the pre-tensioning spring to compensate for the gap between the tower and the reinforcement platform. At the same time, the limiting teeth on the limiting block cooperate with the tooth grooves on the limiting column. After the limiting column moves downward, the upward movement of the limiting column is limited, thereby limiting the upward movement of the conical platform.

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