A secondary grouting mold for a fan foundation

Abstract

The utility model discloses a fan foundation secondary grouting mould relates to the technical field of wind power generation, including connecting plate, support plate no.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically to a secondary grouting mold for wind turbine foundations. Background Technology

[0002] The wind turbine foundation is a key load-bearing structure of the wind turbine generator set. Its safety and stability are directly related to the service life of the entire unit. At present, large wind turbine foundations generally adopt the prestressed anchor bolt connection method. That is, after the foundation ring or anchor plate is installed in place, high-strength non-shrink grouting is carried out in the annular space reserved between it and the concrete foundation. This process is called "secondary grouting". The main function of the secondary grouting layer is to effectively transfer the huge load of the upper tower to the concrete foundation.

[0003] In existing technologies, secondary grouting construction of wind turbine foundations typically uses traditional wooden molds or simple steel molds as forming molds. The joints of traditional wooden molds are not easy to seal completely, and cement grout leakage is prone to occur during the pouring and vibration of grout. This not only wastes materials, but more seriously, it leads to the grout body being not dense, forming defects, which directly affects its load-bearing capacity and durability. The installation of wooden molds requires a lot of cutting and fixing work on site, which is complicated and time-consuming. Disassembly can also easily cause bumps and damage to the edges of the grout body that has not yet reached its final strength. For foundation rings of different models and diameters, it is often necessary to remake molds of specific sizes. Wooden molds are basically for single use, while the adjustment range of simple steel molds is limited, resulting in high construction costs and serious waste of resources.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this utility model is to provide a secondary grouting mold for wind turbine foundations to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a secondary grouting mold for wind turbine foundations, including a connecting plate, a support plate one, and a support plate two. The support plate one and the support plate two are respectively vertically fixed to the bottom of both ends of the connecting plate along its length direction. The length of the support plate two is greater than the length of the support plate one. The connecting plate, the support plate one, and the support plate two together form a mold body one. Multiple mold bodies one can be spliced ​​together to form a mold body two. The horizontal cross-section of the connecting plate is an isosceles trapezoid, and the horizontal cross-section of the support plate one and the support plate two are both fan-shaped annular.

[0007] The connecting plate has a rotating groove at the top of the center of the side wall at both ends along the circumference of the support plate. The rotating groove is equipped with a locking mechanism. The connecting plate, support plate one and support plate two are each equipped with a sealing strip at both ends along the circumference of the support plate.

[0008] Furthermore, the top of the first support plate is provided with mounting groove 1 at both ends along its circumference, and the top of the second support plate is provided with mounting groove 2 at both ends along its circumference. The same connecting block is provided in both mounting groove 1 and mounting groove 2. The connecting block is detachably connected to the first support plate or the second support plate respectively by bolts. The locking mechanism set in the rotating groove includes a limiting block 1 that rotates horizontally at the top of the inner wall of the rotating groove, and a limiting block 2 is coaxially fixed at the bottom of the limiting block 1.

[0009] Furthermore, the radius of the cross-section of the second limiting block is larger than that of the first limiting block. Vertical limiting posts are fixed on both sides of the opposite outer edge of the top of the second limiting block. The limiting posts can rotate in the rotating groove. A limiting groove is vertically opened at the center of the side of the top of the first limiting block near the edge of the connecting plate. When two adjacent connecting plates are spliced ​​in the same direction, the two first limiting blocks can be spliced ​​into a complete column and the limiting grooves on them can be spliced ​​into a complete slot. A fan-shaped limiting slide groove is opened at the bottom of the second limiting block. A limiting slider is rubbed and slidable in the limiting slide groove. The limiting slider is fixed on the inner wall of the bottom of the rotating groove.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. By splicing multiple mold parts one to form mold part two, the modular design allows the mold to flexibly adapt to various shapes and sizes of installation requirements according to the actual needs of the construction site through different splicing methods. Whether it is a wind turbine foundation ring of different specifications or a grouting area with a special shape, a high degree of matching can be achieved by reasonably splicing mold parts one, which greatly improves the versatility of the mold, reduces the number of molds to be made, reduces construction costs, and avoids waste of resources.

[0012] 2. The locking mechanism enables quick and accurate connection and fixation between mold parts during assembly, shortening installation time. Similarly, during disassembly, no complicated operations are required, allowing for quick separation of the mold parts, reducing the time spent on the construction site and improving overall construction efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a mold component in a secondary grouting mold for a wind turbine foundation.

[0014] Figure 2 An exploded view of a partial structure of a mold component in a secondary grouting mold for a wind turbine foundation;

[0015] Figure 3 This is a schematic diagram of the structure of a secondary grouting mold for a wind turbine foundation after multiple molds are assembled separately.

[0016] Figure 4This is a schematic diagram of the overall structure of a two-part mold in a secondary grouting mold for a wind turbine foundation.

[0017] Figure 5 This is a schematic diagram of the structure of a secondary grouting mold for a wind turbine foundation after multiple molds are assembled in two separate parts.

[0018] In the picture:

[0019] 10. Connecting plate; 101. Rotating groove; 11. Support plate one; 12. Support plate two; 13. Connecting block;

[0020] 20. Limiting block one; 21. Limiting block two; 22. Limiting post. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see the appendix Figure 1 To be continued Figure 5 This utility model provides a secondary grouting mold for a wind turbine foundation, comprising a connecting plate 10, a first support plate 11, and a second support plate 12. The first support plate 11 and the second support plate 12 are vertically fixed to the bottom of both ends of the connecting plate 10 along its length direction, wherein the length of the second support plate 12 is greater than the length of the first support plate 11. The connecting plate 10, the first support plate 11, and the second support plate 12 together form a mold body 1. Multiple mold bodies 1 can be spliced ​​together to form a mold body 2. The horizontal cross-section of the connecting plate 10 is an isosceles trapezoid, and the horizontal cross-sections of the first support plate 11 and the second support plate 12 are both fan-shaped annular.

[0023] The connecting plate 10 is provided with a rotating groove 101 at the top of the center of the side wall at both ends along the circumference of the support plate 11. A locking mechanism is provided in the rotating groove 101. The connecting plate 10, the support plate 11 and the support plate 2 are provided with sealing strips at both ends along the circumference of the support plate 11.

[0024] The top of the support plate 11 is provided with a mounting groove 1 at both ends along its circumference, and the top of the support plate 2 is provided with a mounting groove 2 at both ends along its circumference. The same connecting block 13 is provided in both the mounting groove 1 and the mounting groove 2. The connecting block 13 is detachably connected to the support plate 11 or the support plate 2 12 by bolts.

[0025] It should be noted that: connecting plate 10, support plate one 11 and support plate two 12 can be regarded as an integrally formed structure. The vertical cross section is "door" shaped. The hollow structure reduces weight while increasing the support capacity compared with traditional steel molds and making it easier to install steel mold support tools on the outside.

[0026] The forward splicing described in the text refers to the process where, after two adjacent molds are spliced ​​together, the lengths of the same end of the two connecting plates 10 are the same. Specifically, as shown below... Figure 3 As shown, multiple mold parts can be spliced ​​together in a straight line to form a complete ring structure, specifically as follows: Figure 4 The structure shown is an example of two adjacent mold parts 1 being spliced ​​in reverse. Mold part 2 is the whole after multiple mold parts 1 are spliced ​​together. Therefore, for larger wind turbines, compared to splicing mold parts 1 one by one, the efficiency of initial installation and deployment can be improved.

[0027] Based on the actual size and shape of the wind turbine foundation ring, determine the required number of mold components, splice the various mold components together so that the ends of adjacent connecting plates 10 are connected to each other. Connecting blocks 13 and bolts are used to further strengthen the connection strength between two adjacent mold components. Sealing strips are used to ensure the sealing after splicing and prevent grout leakage during the grouting process.

[0028] Understandably, the shape and size of each component in the mold splitting process can also be changed to adapt to more precise operating scenarios.

[0029] Please see the appendix Figure 1 To be continued Figure 5 The present invention provides a technical solution: the locking mechanism provided in the rotating groove 101 includes a limiting block 20 that rotates horizontally at the top of the inner wall of the rotating groove 101, a limiting block 21 that is coaxially fixed at the bottom of the limiting block 20, the cross-sectional radius of the limiting block 21 being larger than that of the limiting block 20, and vertical limiting posts 22 fixed on opposite sides of the top outer edge of the limiting block 21, the limiting posts 22 being rotatable within the rotating groove 101;

[0030] A limiting groove is vertically formed at the center of the side of the top of the limiting block 20 near the edge of the connecting plate 10. When two adjacent connecting plates 10 are spliced ​​together in the same direction, the two limiting blocks 20 can be spliced ​​into a complete column and the limiting grooves on them can be spliced ​​into a complete slot. The bottom of the limiting block 21 is provided with a fan-shaped limiting slide groove. A limiting slider is rubbed and slidably provided in the limiting slide groove. The limiting slider is fixed on the inner wall of the bottom of the rotating groove 101.

[0031] It should be noted that the rotating groove 101 is composed of rotating groove one, rotating groove two and rotating groove three. Rotating groove one is set through the top of the connecting plate 10, rotating groove two is set at the bottom of rotating groove one and the two are interconnected, rotating groove three is set at the top outer edge of rotating groove two and the two are interconnected, but rotating groove one is not directly interconnected with rotating groove three. The limiting block one 20 is rotatably set in rotating groove one, the limiting block two 21 is rotatably set in rotating groove two, and the limiting post 22 is rotatably set in rotating groove three.

[0032] During the splicing process, after two adjacent connecting plates 10 are spliced ​​in the same direction, the two limiting blocks 1 20 and the two limiting blocks 21 are spliced ​​into a complete column. The limiting grooves on the limiting blocks 1 20 are spliced ​​into a complete slot. At this time, a tool that is compatible with the cross-sectional shape and size of the slot is inserted and rotated, which can drive the locking mechanism to rotate, so that the limiting column 22 on one side moves into the rotating groove 101 on the other side.

[0033] In one possible embodiment, the slot cross-section is a regular hexagon, and the rotation can be driven by the corresponding shape of the internal hexagon. During this period, the limiting slider and the limiting groove prevent the locking mechanism from falling off, and the friction between the two prevents the locking mechanism from loosening during grouting, thus realizing the initial connection between the mold parts.

[0034] After confirming that the inner and outer molds are installed, grouting can be carried out. After the grout reaches the demolding strength, first remove the bolts and connecting blocks 13, release the reinforcing connection between the mold parts, operate the locking mechanism to make the limit block 1 20 and limit block 2 21 rotate, release the locking state between adjacent connecting plates 10, and separate each mold part in turn to complete the mold disassembly.

[0035] Understandably, once the entire assembly is complete, dismantling can be carried out as a unit based on mold part one or mold part two, depending on the actual site conditions.

[0036] Working principle:

[0037] The mold body one consists of a connecting plate 10, a support plate one 11 and a support plate two 12. Multiple parts can be assembled to form mold body two. When assembling, the ends of adjacent connecting plates 10 are joined together.

[0038] In the locking mechanism, the first limiting block 20 and the second limiting block 21 in the rotating groove 101 are fully spliced ​​together, and the limiting groove becomes a complete slot. When the adapter tool is inserted and rotated, the limiting post 22 rotates in the rotating groove 101, and the limiting slider slides in the limiting groove to prevent it from falling off and loosening, thus achieving a preliminary connection. Then, the connecting block 13 and bolts are used to reinforce it, and the sealing strip ensures a seal.

[0039] When disassembling the mold, first remove the bolts and connecting block 13, then operate the locking mechanism to release the lock and separate the mold parts.

Claims

1. A secondary grouting mold for a wind turbine foundation, comprising a connecting plate (10), a first support plate (11), and a second support plate (12), wherein the first support plate (11) and the second support plate (12) are respectively vertically fixed to the bottom of both ends of the connecting plate (10) along its length direction, wherein the length of the second support plate (12) is greater than the length of the first support plate (11), characterized in that: The connecting plate (10), together with the first support plate (11) and the second support plate (12), form the first mold body. Multiple first mold bodies can be spliced ​​together to form the second mold body. The horizontal cross section of the connecting plate (10) is an isosceles trapezoid, and the horizontal cross sections of the first support plate (11) and the second support plate (12) are both fan-shaped. The connecting plate (10) has a rotating groove (101) at the top of the center of the side wall at both ends of the circumferential direction of the support plate (11). The rotating groove (101) is equipped with a locking mechanism. The connecting plate (10), the support plate (11) and the support plate (2) are respectively equipped with sealing strips at both ends of the circumferential direction of the support plate (11).

2. The secondary grouting mold for a wind turbine foundation as described in claim 1, characterized in that: The top of the support plate 1 (11) is provided with a mounting groove 1 at both ends along its circumference, and the top of the support plate 2 (12) is provided with a mounting groove 2 at both ends along its circumference. The same connecting block (13) is provided in both the mounting groove 1 and the mounting groove 2. The connecting block (13) is detachably connected to the support plate 1 (11) or the support plate 2 (12) by bolts.

3. The secondary grouting mold for a wind turbine foundation as described in claim 1, characterized in that: The locking mechanism provided in the rotating groove (101) includes a limiting block one (20) that rotates horizontally at the top of the inner wall of the rotating groove (101), and a limiting block two (21) that is coaxially fixed at the bottom of the limiting block one (20).

4. The secondary grouting mold for a wind turbine foundation as described in claim 3, characterized in that: The cross-sectional radius of the second limiting block (21) is greater than that of the first limiting block (20). Vertical limiting posts (22) are fixed on both sides of the top outer edge of the second limiting block (21). The limiting posts (22) can rotate in the rotating groove (101).

5. The secondary grouting mold for a wind turbine foundation as described in claim 3, characterized in that: The limiting block 1 (20) has a vertically opening limiting groove at the center of one side near the edge of the connecting plate (10). When two adjacent connecting plates (10) are spliced ​​together in the same direction, the two limiting blocks 1 (20) can be spliced ​​into a complete column and the limiting grooves on them can be spliced ​​into a complete slot.

6. The secondary grouting mold for a wind turbine foundation as described in claim 3, characterized in that: The bottom of the second limiting block (21) is provided with a fan-shaped limiting groove, and a limiting slider is provided in the limiting groove for friction sliding. The limiting slider is fixed on the inner wall of the bottom of the rotating groove (101).

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