A wind turbine foundation ring reinforcing device and reinforcing method

Abstract

The application relates to the technical field of wind power generation equipment, and relates to a wind power generator foundation ring reinforcing device and a reinforcing method. The device comprises a reinforcing table arranged on the top of an original concrete foundation, a conical table arranged in a conical cavity between the reinforcing table and a tower drum, a pre-pressing component arranged on the top of the reinforcing table, and the pre-pressing component comprises: a first support base fixedly connected with the reinforcing table; a connecting drum connected with the first support base; a pressing rod arranged in the connecting drum and provided with a pressing block arranged at the lower end of the pressing rod for extruding the conical table; a pre-tightening spring arranged between the connecting drum and the pressing block and sleeved on the pressing rod; a limiting column arranged at the upper end of the pressing rod and provided with a plurality of tooth grooves arranged in the axial direction, the lower side of the tooth groove is perpendicular to the axis of the limiting column, and the upper side of the tooth groove is in a wedge-shaped structure; and a limiting block, the top of the reinforcing table is fixedly provided with a second support base, the limiting block is elastically arranged on the second support base and is provided with a limiting tooth matched with the tooth groove, so as to limit the upward movement of the limiting column. The application avoids the rapid wear of the conical table, and greatly prolongs the service life of the conical table.

Description

Technical Field

[0001] This invention relates to the field of wind power generation equipment technology, and more specifically, to a wind turbine foundation ring reinforcement device and reinforcement method. Background Technology

[0002] The lower end of the foundation ring is embedded 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 transmitted from the tower. Due to the limitations of this 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 severe. After wear, gaps will appear between the two, which will lead to an increase in the tower's vibration amplitude, which will further accelerate the wear of the concrete. Over time, this will lead to a decrease in the connection strength between the tower and the foundation, and even the foundation may collapse.

[0003] In the prior art, some solutions have been proposed to address the above problems. For example, patent document CN117364828A provides a wind turbine foundation reinforcement device that acts on the existing concrete foundation of the wind turbine. Through the installation of conical extrusion components and prestressed springs, the conical extrusion components, under the action of prestress, move downwards to compensate for the gap between the tower and the concrete, thereby reducing the amplitude of the tower's vibration. However, the downward pressure of the conical extrusion components is only provided by the elastic force of the prestressed springs. During the lateral vibration of the tower under wind load, the tower repeatedly squeezes the conical extrusion components. When the wind load is large, the upward component of the wind load along the conical surface easily causes the conical extrusion components to move upwards, resulting in extremely rapid wear between the tower and the inner side of the conical extrusion components, as well as between the outer side of the conical extrusion components and the concrete, thus greatly reducing the service life of the conical extrusion components. Summary of the Invention

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

[0005] This invention is achieved through the following technical solution:

[0006] A wind turbine foundation ring reinforcement device includes a reinforcing platform located on top of the original concrete foundation. A conical cavity is provided between the top inner side of the reinforcing platform and the tower. A matching conical platform is located within the conical cavity. A pre-compression component is provided on the top of the reinforcing platform for pressing the conical platform. The pre-compression component includes:

[0007] The first support base is fixedly connected to the reinforcing platform;

[0008] The connecting cylinder is connected to the first support base;

[0009] The pressure rod passes through the inside of the connecting cylinder, and its lower end is provided with a pressure block for pressing the conical platform;

[0010] A preloaded spring is press-fitted between the connecting cylinder and the pressure block and sleeved on the pressure rod;

[0011] A limiting post, located at the upper end of the pressure rod, has several toothed grooves along its axial direction. The lower side of the toothed grooves is perpendicular to the axis of the limiting post, and the upper side of the toothed grooves has a wedge-shaped structure.

[0012] The limiting block is fixed to the top of the reinforcing platform with a second support seat. The limiting block is elastically set on the second support seat and is provided with limiting teeth that cooperate with the tooth groove, so as to restrict the upward movement of the limiting post after the limiting post moves down.

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

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

[0015] Optionally, a guide rod is inserted inside the omnidirectional ball, one end of which is fixedly connected to the support block, and the other end of which is provided with a baffle.

[0016] Optionally, the connecting cylinder is connected to the first support seat by a thread.

[0017] Optionally, the limiting block is connected to a first stop, the stop is connected to a guide rod, the guide rod passes through the second support seat and has a second stop at the end away from the first stop, and the guide rod is fitted with a reset spring, one end of the reset spring abuts against the second support seat and the other end of the reset spring abuts against the second stop.

[0018] Optionally, the strengthening platform includes:

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

[0020] Top cover, located at the opening of the reinforced box; and

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

[0022] Optionally, the support platform includes:

[0023] The support box has an open top and contains supporting concrete inside;

[0024] The lid is located at the opening of the support box;

[0025] Several horizontal bolts, one end of which is inserted into the original concrete foundation, and the other end extends out of the side of the support box and is welded with reinforcing nuts; and

[0026] Several vertical bolts are welded to the bottom of the support box at their lower ends, and the other ends extend out of the box cover and are welded with reinforcing nuts.

[0027] This invention also provides a method for reinforcing a wind turbine foundation ring. Using any one of the aforementioned wind turbine foundation ring reinforcement devices, a reinforcing platform is installed on the top surface of the original concrete foundation. A pre-compression component is installed on the reinforcing platform. The elastic force of a pre-compression spring causes a pressure block to press down on a conical platform, filling the conical cavity between the top inner side of the reinforcing platform and the tower. After wear creates a gap between the tower and the reinforcing platform, the conical platform can further move downwards under the action of the pre-compression spring, compensating for the gap between the tower and the reinforcing platform. Simultaneously, by utilizing the engagement of the limiting teeth on the limiting block and the grooves on the limiting post, the downward movement of the limiting post restricts its upward movement, thereby restricting 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 pressure block, under the action of the pre-tightening spring, presses the conical platform downward, filling the conical cavity between the top of the inner side of the reinforcing platform and the tower. After wear creates a gap between the tower and the reinforcing platform, the conical platform can move further downward under the action of the pre-tightening 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 post. Since the upper side of the tooth groove has a wedge-shaped structure, the downward movement of the limiting post can squeeze the limiting block open, i.e., the limiting post... It can move downwards smoothly (that is, without affecting the pre-tightening spring driving the pressure block to further press down the conical platform), and the lower side of the tooth groove is perpendicular to the axis of the limiting post. When the limiting post has an upward tendency, the force applied to the limiting block is parallel to the axis of the limiting post and upwards, and cannot squeeze the limiting block open. Therefore, after the limiting post moves downwards (that is, after compensating for the gap between the tower and the reinforcing platform), the limiting block can restrict the upward movement of the limiting post, thereby restricting the upward movement of the conical platform. This avoids the conical platform from wearing out quickly, greatly extends the service life of the conical platform, and solves the defects of the existing technology. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

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

[0031] Figure 2 for Figure 1 Enlarged view of point A;

[0032] Figure 3 This is a schematic diagram of the mating structure of the limiting post and the limiting block;

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

[0034] Figure 5 for Figure 4 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-Reinforcing platform, 401-Reinforcing box, 402-Top cover, 403-Anchor bolt, 5-Conical platform, 6-Pre-tightening component, 601-First support seat, 602-Connecting cylinder, 603-Pressure rod, 604-Pre-tightening spring, 605-Pressure block, 606-Limiting post, 607-Limiting block, 608-Second support seat, 609-First stop block, 610-Guide rod, 611-Reset spring, 612-Second stop block, 7-Shock damping component, 701-Buffer spring, 702-Support block, 703-Guide rod, 704-Universal ball, 705-Baffle, 8-Support platform, 801-Support box, 802-Box cover, 803-Horizontal bolt, 804-Vertical bolt, 9-Diagonal brace, 10-Support ring. Detailed Implementation

[0037] Example 1

[0038] refer to Figures 1-3 A wind turbine foundation ring 2 reinforcement device includes a reinforcing platform 4 located on top of the original concrete foundation 1. A conical cavity is provided between the top inner side of the reinforcing platform 4 and the tower 3. In this embodiment, the reinforcing platform 4 includes a reinforcing box 401, a top cover 402, and several anchor bolts 403. The top cover 402 is located at the opening of the reinforcing box 401. Concrete is poured inside the reinforcing box 401 to form reinforced concrete. The lower ends of the anchor bolts 403 penetrate the original concrete foundation 1 (it is easy to understand that corresponding holes for the anchor bolts 403 should be drilled in the original concrete foundation 1 first). The upper ends of the anchor bolts 403 extend out of the top cover 402 and are welded with reinforcing nuts. This arrangement can greatly improve the structural strength of the reinforcing platform 4. Furthermore, the upper ends of the anchor bolts 403 are welded to the top cover 402.

[0039] The conical cavity is provided with a matching conical platform 5, and the top of the reinforcing platform 4 is provided with a pre-pressing component 6 for pressing the conical platform 5. The pre-pressing component 6 includes a first support seat 601, a connecting cylinder 602, a pressure rod 603, a pre-pressing spring 604, a limiting post 606, and a limiting block 607.

[0040] The first support base 601 is fixedly connected to the reinforcing platform 4 (e.g., by welding or by bolts), and the connecting cylinder 602 is connected to the first support base 601. In this embodiment, the connecting cylinder 602 and the first support base 601 are connected by threads. This arrangement allows the preload of the preload spring 604 to be actively adjusted by turning the connecting cylinder 602.

[0041] The pressure rod 603 passes through the inside of the connecting cylinder 602, and the lower end is provided with a pressure block 605 for pressing the conical platform 5. The pre-tightening spring 604 is pressed between the connecting cylinder 602 and the pressure block 605 and sleeved on the pressure rod 603. In this way, under the action of the pre-tightening spring 604, the pressure block 605 presses the conical platform 5 downward and fills the conical cavity between the top of the inner side of the reinforcing platform 4 and the tower cylinder 3.

[0042] A limiting post 606 is located at the upper end of the pressure rod 603 and has several toothed grooves along the axial direction. The lower side of the toothed groove is perpendicular to the axis of the limiting post 606, and the upper side of the toothed groove has a wedge-shaped structure, that is, the upper side of the toothed groove forms a certain angle with the lower side of the toothed groove. In other words, if the lower side of the toothed groove is considered as a plane, then the upper side of the toothed groove is an inclined plane. A second support base 608 is fixedly provided on the top of the reinforcing platform 4, and a limiting block 607 is elastically disposed on the second support base 608 and has limiting teeth that cooperate with the toothed grooves.

[0043] It is worth noting that, because the upper side of the toothed groove has a wedge-shaped structure, the downward movement of the limiting post 606 can squeeze the limiting block 607 open, that is, the limiting post 606 can move downward smoothly (that is, it does not affect the pre-tightening spring 604 driving the pressure block 605 to further press down the conical platform 5 to compensate for the gap). However, the lower side of the toothed groove is perpendicular to the axis of the limiting post 606. When the limiting post 606 has an upward tendency, the force applied to the limiting block 607 is parallel to the axis of the limiting post 606 and upward, and cannot squeeze the limiting block 607 open. Therefore, after the limiting post 606 moves downward (that is, after compensating for the gap between the tower 3 and the reinforcing platform 4), the limiting block 607 can restrict the upward movement of the limiting post 606, thereby restricting the upward movement of the conical platform 5. This avoids the rapid wear of the conical platform 5, greatly extends the service life of the conical platform 5, and solves the defects of the prior art.

[0044] As an alternative, in this embodiment, the limiting block 607 is elastically disposed on the second support base 608 in the following manner: the limiting block 607 is connected to a first stop 609, the stop is connected to a guide rod 610, the guide rod 610 passes through the second support base 608, and a second stop 612 is provided at the end away from the first stop 609. A return spring 611 is sleeved on the guide rod 610, one end of the return spring 611 abuts against the second support base 608, and the other end of the return spring 611 abuts against the second stop 612. Of course, in other embodiments, the limiting block 607 elastically disposed on the second support base 608 can also be implemented in other ways. For example, a guide cylinder is provided on the second support base 608, the limiting block 607 is slidably disposed in the guide cylinder, and the return spring 611 is fixedly connected between the limiting block 607 and the second support base 608.

[0045] Example 2

[0046] refer to Figures 4-6 This embodiment further improves upon 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 cover 802, several horizontal bolts 803, and several vertical bolts 804. The top of the support box 801 is open, and the cover 802 is located at the open end of the support box 801. Concrete is poured inside the support box 801 to form supporting concrete. One end of each horizontal bolt 803 passes through the interior of the original concrete foundation 1 (it is easy to understand that corresponding holes for the horizontal bolts 803 should be drilled in the original concrete foundation 1 first), and the other end of each horizontal bolt 803 extends out of the side of the support box 801 and is welded with a reinforcing nut. The lower end of each vertical bolt 804 is welded to the bottom of the support box 801, and the other end extends out of the cover 802 and is welded with a reinforcing nut. This arrangement greatly improves the structural strength of the support platform 8. Furthermore, the side of the support box 801 is welded to the horizontal bolts 803, and the cover 802 is welded to the vertical bolts 804.

[0047] A support ring 10 is provided on the outer side of the tower 3. The support ring 10 is fixedly connected to the support platform 8 by several diagonal braces 9 (e.g., by welding or bolting). Several damping components 7 are provided on the support ring 10 along the circumferential direction. The damping components 7 include a buffer spring 701, a damper (not shown in the figure), 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 aforementioned conical platform 5 set at the connection of the tower 3, the conical platform 5 restricts the lateral displacement of the bottom of the tower 3, which will cause the vibration of the upper part of the tower 3 to increase. The vibration damping component set in this embodiment absorbs the vibration energy of the tower 3 and limits the vibration amplitude of the tower 3, thus effectively solving the above problem.

[0049] In this embodiment, the shock-absorbing component 7 also includes a universal ball 704, which is rotatably embedded in the support ring 10. A buffer spring 701 and a damper are fixedly connected between the universal ball 704 and the support block 702. This arrangement allows the support block 702 to rotate at any angle within a certain range, better adapting to the sway of the tower 3, and thus providing better support during the swaying process of the tower 3. Furthermore, a guide rod 703 is inserted inside 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 guides the extension and retraction of the buffer spring 701 using the guide rod 703, making the shock-absorbing component 7 more reliable.

[0050] Example 3

[0051] This embodiment provides a method for reinforcing the foundation ring 2 of a wind turbine. It 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 used). The method involves setting a reinforcing platform 4 on the top surface of the original concrete foundation 1, and then installing a pre-compression component 6 on the reinforcing platform 4. The elastic force of the pre-compression spring 604 is used to press the pressure block 605 downward to squeeze the conical platform 5, so that the conical platform 5 fills the conical cavity between the inner top of the reinforcing platform 4 and the tower 3. After the tower 3 and the reinforcing platform 4 wear and create a gap, the conical platform 5 can move further downward under the action of the pre-compression spring 604 to compensate for the gap between the tower 3 and the reinforcing platform 4.

[0052] Meanwhile, by utilizing the limiting teeth on the limiting block 607 to engage with the tooth grooves on the limiting post 606, the limiting post 606 can move downwards but cannot move upwards. That is, after the limiting post 606 moves downwards (i.e., after compensating for the gap between the tower 3 and the reinforcing platform 4), the limiting block 607 can restrict the upward movement of the conical platform 5, thus preventing the conical platform 5 from wearing out too quickly, greatly extending the service life of the conical platform 5, and solving the defects of the prior art.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A wind turbine foundation ring reinforcing device, comprising a reinforcing platform arranged on the top of the original concrete foundation, a conical cavity is arranged between the inner top of the reinforcing platform and the tower drum, a conical platform matched with the conical cavity is arranged in the conical cavity, and a pre-pressing component for extruding the conical platform is arranged on the top of the reinforcing platform, characterized in that, the pre-pressing component comprises a plurality of pre-pressing blocks arranged on the top of the reinforcing platform, and the pre-pressing blocks are arranged in a staggered manner. The pre-pressing component comprises: a first support base fixedly connected with the reinforcing platform; a connecting cylinder connected with the first support base; a pressing rod arranged in the connecting cylinder and provided with a pressing block at a lower end for extruding the conical platform; a pre-tightening spring arranged between the connecting cylinder and the pressing block and sleeved on the pressing rod; a limiting column arranged at an upper end of the pressing rod and provided with a plurality of tooth grooves in an axial direction, a lower side of the tooth grooves being perpendicular to an axis of the limiting column, and an upper side of the tooth grooves being in a wedge-shaped structure; and a limiting block elastically arranged on a second support base fixedly arranged at a top of the reinforcing platform and provided with limiting teeth matched with the tooth grooves, so as to limit upward movement of the limiting column after the limiting column moves downward, thereby limiting upward movement of the conical platform. The outer side of the bottom of the original concrete foundation is provided with a support platform, the outer side of the tower cylinder is provided with a support ring, a plurality of inclined struts are fixedly connected between the support ring and the support platform, a plurality of damping components are arranged on the support ring in a circumferential direction, the damping component comprises a buffer spring, a damper and a support block for supporting the tower cylinder, the buffer spring and the damper are fixedly connected between the support block and the support ring; the damping component further comprises a universal ball rotatably embedded on the support ring, and the buffer spring and the damper are fixedly connected between the universal ball and the support block.

2. A wind turbine foundation ring reinforcement apparatus according to claim 1, characterised in that, A guide rod is arranged in the universal ball, one end of the guide rod is fixedly connected with the support block, and the other end of the guide rod is provided with a baffle.

3. A wind turbine foundation ring reinforcement device according to claim 1 or 2, characterised in that, The connecting cylinder is connected with the first support base through threads.

4. A wind turbine foundation ring reinforcement device according to claim 1 or 2, characterised in that, The limiting block is connected with a first baffle, the baffle is connected with a guide rod, the guide rod is arranged in the second support base and provided with a second baffle at an end away from the first baffle, the guide rod is sleeved with a return spring, one end of the return spring abuts against the second support base, and the other end of the return spring abuts against the second baffle.

5. A wind turbine foundation ring reinforcement device according to claim 1 or 2, characterised in that, The reinforcing platform comprises: a top-open reinforcing box, an inside of which is provided with reinforced concrete; a top cover arranged at an opening of the reinforcing box; and a plurality of anchor bolts, lower ends of which are arranged in the original concrete foundation, upper ends of which extend out of the top cover and are welded with reinforcing nuts.

6. A wind turbine foundation ring reinforcement apparatus according to claim 1 or 2, characterised in that, The support platform comprises: a top-open support box, an inside of which is provided with support concrete; a box cover arranged at an opening of the support box; a plurality of horizontal bolts, one end of each of which is arranged in the original concrete foundation, the other end of each of which extends out of a side surface of the support box and is welded with a reinforcing nut; and a plurality of vertical bolts, lower ends of which are welded to a bottom of the support box, the other ends of which extend out of the box cover and are welded with reinforcing nuts.

7. A method of reinforcing a wind turbine foundation ring using the wind turbine foundation ring reinforcing device according to any one of claims 1 to 6, characterized by, The reinforcing platform is arranged on the top surface of the original concrete foundation, the pre-pressing component is installed on the reinforcing platform, the pressing block is extruded downward to the conical platform by the elastic force of the pre-tightening spring, the conical platform fills the conical cavity between the inside top of the reinforcing platform and the tower cylinder, after wear generates a gap between the tower cylinder and the reinforcing platform, the conical platform can further move downward under the action of the pre-tightening spring, thereby compensating the gap between the tower cylinder and the reinforcing platform; meanwhile, the limiting teeth on the limiting block are matched with the tooth grooves on the limiting column, the upward movement of the limiting column is limited after the limiting column moves downward, thereby limiting the upward movement of the conical platform.

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