Device for preparing embedded screw type wind power blade

By pre-embedding screw-type wind turbine blade devices, fiberglass and steel structures are pre-connected, solving the problems of high cost and transportation difficulties in existing technologies, and achieving the effects of cost reduction and stable connection.

CN223701790UActive Publication Date: 2025-12-23CHENGFENG ENERGY (TAIYUAN) CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202520553729.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-27
Publication Date
2025-12-23
Estimated Expiration
2035-03-27

AI Technical Summary

Technical Problem

Existing wind turbine blades are made of fiberglass as a single piece, which is costly and their long length makes transportation difficult and costly.

Method used

The wind turbine blade device with pre-embedded screws is adopted. By setting screw positioning plates and pre-embedded nuts on the mold body, glass fiber is injected and connected to the pre-embedded screws to form a connection between the fiberglass and the steel structure. The connection is achieved by using the pre-embedded screws.

Benefits of technology

This reduces the manufacturing and transportation costs of the blades while maintaining high connection strength and stability, achieving a stable connection between fiberglass and steel structures.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223701790U_ABST
    Figure CN223701790U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of wind power blade production, and aims to solve the technical problem of high cost. In order to solve the technical problem, the utility model provides the device for preparing the pre-embedded screw type wind power blade. According to the utility model, a screw rod positioning plate is connected to the end surface of a mold body; a plurality of connecting holes are formed in the screw positioning plate at intervals, embedded nuts are detachably connected into the connecting holes, and the embedded nuts are connected with the connecting holes in a sealed mode; an embedded screw rod is in threaded connection with the interior of the embedded nut, and the embedded nut and the embedded screw rod are sealed; glass fibers are poured into the mold body, and the glass fibers are connected with the bottom ends of the embedded screws after being solidified; the top end of the embedded screw is exposed out of the top of the screw positioning plate and is in butt joint with the steel structure. The steel structure is used for replacing glass fiber reinforced plastics, so that the blade cost is reduced. The steel structure part and the glass fiber reinforced plastic part are connected in a mode of pre-embedding the screw, and the connection strength and stability are high.
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of wind power blade production technology, especially a device for preparing a pre-buried screw rod type wind power blade. BACKGROUND

[0002] The wind power blade is a core component of the wind power generator set, which converts the wind energy in nature into the electric energy of the wind power generator set, and is the main basis for measuring the design and technical level of the wind power generator set.

[0003] The wind power blade is an industry with high certainty, large market capacity and clear profit mode. With the easing of the supply and demand situation, the wind power blade industry will also change from the fierce competition among many companies to the competition among a few strong companies. The wind power blade industry in China is undergoing an industry-wide reshuffle. With the expansion of the wind power blade market, the cost and selling price will decrease, but the cost reduction speed of enterprises with scale, technology and cost advantages will be faster than the selling price reduction speed, and the profit will be higher than the average level. The future industry competition pattern requires manufacturers to expand their scale, reduce their cost and maintain certain advantages in technology.

[0004] The existing blade is made of glass steel as a whole, and the manufacturing cost of the blade is high. In addition, the length of the blade is relatively long (for example, more than 19.8 meters), and the length of the whole blade is too large to be transported, and the transportation cost is very high. SUMMARY

[0005] Therefore, the utility model wants to solve the technical problem existing in the prior art.

[0006] To solve the above technical problems, the utility model provides a device for preparing a pre-buried screw rod type wind power blade, which comprises:

[0007] A mold body;

[0008] A screw rod positioning plate connected at the end face of the mold body, a plurality of connecting holes are arranged at intervals on the screw rod positioning plate, a pre-buried nut is detachably connected in the connecting hole, and the pre-buried nut is in sealing connection with the connecting hole; a pre-buried screw rod is threadedly connected in the pre-buried nut, and the pre-buried nut is sealed with the pre-buried screw rod;

[0009] Wherein, the mold body is filled with glass fibers, and the glass fibers are connected with the bottom end of the pre-buried screw rod after solidification; the top end of the pre-buried screw rod is exposed from the top of the screw rod positioning plate, and is butt jointed with the steel structure.

[0010] In an embodiment of the utility model, the pre-buried nut is a hexagonal pre-buried nut; correspondingly, the connecting hole is a hexagonal hole.

[0011] In an embodiment of the utility model, the gap between the side wall of the pre-buried nut and the connecting hole is 0.4-0.6mm.

[0012] In one embodiment of the utility model, the fixed plate is arranged below the screw positioning plate in parallel.

[0013] In one embodiment of the utility model, the fixed plate is detachably connected with the screw positioning plate through bolts.

[0014] In one embodiment of the utility model, the application further comprises a locking assembly corresponding to each embedded nut, which is used to connect and fix the embedded nut and the screw positioning plate.

[0015] In one embodiment of the utility model, the embedded nut is provided with a first threaded hole coaxial with it, and the screw positioning plate is provided with a second threaded hole; the locking assembly comprises a connecting lock piece, a first bolt and a second bolt; the connecting lock piece is arranged on the top of the screw positioning plate, and the connecting lock piece is provided with two through holes; the first bolt is connected with the first threaded hole of the embedded nut through one of the through holes of the connecting lock piece; and the second bolt is connected with the second threaded hole of the screw positioning plate through the other through hole of the connecting lock piece.

[0016] In one embodiment of the utility model, the embedded screw is provided with a mark.

[0017] In one embodiment of the utility model, the thickness of the screw positioning plate is 20mm-21.5mm.

[0018] In one embodiment of the utility model, glue is coated on the side wall of the connecting hole and the embedded nut to realize sealing.

[0019] In one embodiment of the utility model, glue is coated on the connecting part of the embedded screw and the embedded nut to realize sealing.

[0020] The above technical scheme of the utility model has the following advantages compared with the prior art:

[0021] The device for preparing the embedded screw type wind power blade of the utility model positions a plurality of embedded nuts through the screw positioning plate connected on the mold body, then connects the embedded screw in the embedded nut, connects and fixes the embedded screw with the glass fiber after pouring the glass fiber, then removes the screw positioning plate, the embedded nut and the like, so that the embedded screw in the glass steel is realized, and then the flange on the steel structure is connected through the screw when the glass steel and the steel structure are butted. It can be seen that the application replaces the glass steel with the steel structure without reducing the power generation efficiency, reduces the blade manufacturing cost, maximizes the retention of the overall structure of the blade, realizes the connection of the steel structure part and the glass steel part through the embedded screw mode, and has high connection strength and high stability. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the content of the utility model more easily be clearly understood, the following according to the specific embodiment of the utility model and combining with the drawings, the utility model is further explained in detail, wherein,

[0023] Figure 1 It is a plan view of the device for preparing the pre-buried screw rod type wind power blade in the preferred embodiment of the utility model,

[0024] Figure 2 It is Figure 1 the sectional view of the device for preparing the pre-buried screw rod type wind power blade,

[0025] Figure 3 It is Figure 2 the enlarged view of A,

[0026] Figure 4 It is the connection schematic diagram of locking assembly and screw rod positioning plate,

[0027] The description of the drawing of the specification is as follows: 100, mold body; 110, fixed plate,

[0028] 200, screw rod positioning plate; 210, connecting hole; 220, pre-buried nut; 221, first threaded hole; 230, pre-buried screw rod; 240, second threaded hole,

[0029] 300, glass fiber,

[0030] 400, locking assembly; 410, connecting lock piece; 420, first bolt; 430, second bolt,

[0031] 500, glue. Specific embodiments

[0032] The utility model is further explained in combination with the drawings and specific embodiments, so that those skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0033] After research, it is found that all wind power blades do not generate electricity in the 5-meter section away from the blade root part, and mainly play a connecting role, so that the 5-meter section away from the blade root part is replaced by a steel structure. Not only the unit cost is reduced, but also the connection is more stable. The steel structure is close to the blade root part, so how to butt joint the steel structure and the glass steel is a big difficulty, and the application provides a device for preparing a pre-buried screw rod type wind power blade to solve the problem.

[0034] Referring to Figures 1-4 The embodiment of the utility model provides a device for preparing a pre-buried screw rod type wind power blade, which comprises:

[0035] The mold body 100 is used for forming a glass steel part;

[0036] The screw positioning plate 200 is connected at the end face of the mold body 100; a plurality of connecting holes 210 are arranged at intervals on the screw positioning plate 200, a pre-buried nut 220 is detachably connected in the connecting hole 210, and the pre-buried nut 220 is in sealed connection with the connecting hole 210; a pre-buried screw 230 is threadedly connected in the pre-buried nut 220, and the pre-buried nut 220 is sealed with the pre-buried screw 230; in some embodiments, the pre-buried nut 220 is M24. The pre-buried screw 230 is M24*300.

[0037] The glass fiber 300 is poured into the mold body 100, and after the glass fiber 300 is solidified (i.e. glass steel), the bottom end of the pre-buried screw 230 is connected, and the top end of the pre-buried screw 230 is exposed from the top of the screw positioning plate 200 and is connected to the steel structure. In some embodiments, the top ends of the plurality of pre-buried screws 230 are flush with the top of the screw positioning plate 200. The steel structure is provided with a flange, and the flange is provided with a plurality of hole positions, and the pre-buried screw 230 is fixedly connected through the nut after passing through the hole position.

[0038] Specifically, the plurality of pre-buried nuts 220 are positioned by the screw positioning plate 200 connected to the mold body 100, and then the pre-buried screw 230 is connected in the pre-buried nut 220, and after pouring the glass fiber 300, the pre-buried screw 230 is connected and fixed with the glass fiber 300, and then the screw positioning plate 200, the pre-buried nut 220 and the like are removed, so as to realize the pre-buried screw 230 in the glass steel, and then the glass steel is connected with the flange on the steel structure through the screw. That is, the pre-buried screw 230 is pre-buried when the glass steel part is formed, and then the glass steel part is quickly connected with the steel structure part through the pre-buried screw 230, the connection is more stable, and the structure is more reliable. Therefore, the steel structure is used to replace the glass steel without reducing the power generation efficiency, thereby reducing the manufacturing cost of the blade. The overall structure of the blade is maximized, the steel structure part is connected with the glass steel part through the pre-buried screw 230, the connection strength is high, and the stability is high.

[0039] The blade is divided into a glass steel part and a steel structure part, thereby reducing the manufacturing cost and transportation cost of the blade.

[0040] Further, the pre-buried nut 220 is a hexagonal pre-buried nut 220; correspondingly, the connecting hole 210 is a hexagonal hole. Specifically, the pre-buried nut 220 and the connecting hole 210 are both hexagonal structures, which on the one hand avoids the pre-buried nut 220 from rotating in the connecting hole 210, and on the other hand improves the adaptability of the two.

[0041] Further, the gap between the side wall of the embedded nut 220 and the connecting hole 210 is 0.4-0.6 mm. Specifically, the gap can facilitate the placement and removal of the embedded nut 220 in the connecting hole 210.

[0042] Further, the mold body 100 is provided with a fixing plate 110, which is arranged parallel below the screw positioning plate 200; the fixing plate 110 is detachably connected with the screw positioning plate 200. Specifically, the detachable connection between the screw positioning plate 200 and the mold body 100 is realized by the fixing plate 110, which facilitates the removal of the screw positioning plate 200 after the production of the glass steel.

[0043] Further, the fixing plate 110 is detachably connected with the screw positioning plate 200 by bolts. For example, the fixing plate 110 is connected with the screw positioning plate 200 by M12 bolts. Specifically, the connection is convenient and fast.

[0044] Further, the application also includes a locking assembly 400 corresponding to the embedded nut 220, which is used to connect and fix the embedded nut 220 and the screw positioning plate 200.

[0045] Specifically, the embedded nut 220 and the screw positioning plate 200 are further fixed by the locking assembly 400, which further improves the connection stability of the embedded nut 220 and the screw positioning plate 200. Thus, the embedded position of the embedded nut 220 is ensured, which is conducive to the butt joint of the embedded nut 220 and the steel structure (i.e., the connection of the adjacent two blade sections).

[0046] Further, the embedded nut 220 is provided with a first threaded hole 221 coaxial therewith; the screw positioning plate 200 is provided with a second threaded hole 240; the locking assembly 400 includes a connecting lock plate 410, a first bolt 420, and a second bolt 430; the connecting lock plate 410 is arranged on the top of the screw positioning plate 200, and the connecting lock plate 410 is provided with two through holes; the first bolt 420 passes through one of the through holes of the connecting lock plate 410 and is connected with the first threaded hole 221 of the embedded nut 220; the second bolt 430 passes through the other through hole of the connecting lock plate 410 and is connected with the second threaded hole 240 of the screw positioning plate 200. In some embodiments, the second bolt 430 is an M12*20 bolt. The first bolt 420 is an M4*15 bolt. In some possible implementations, the first bolt 420 is an internal hexagonal bolt, which facilitates the tightening or loosening of the first bolt 420. In some embodiments, the thickness of the connecting lock plate 410 is 2 mm.

[0047] Specifically, the structure of the embodiment is simple, and the installation and removal are convenient.

[0048] Further, the embedded screw 230 is provided with a mark (not shown in the figure). In order to ensure the butt joint of the embedded screw 230 and the steel structure, it is necessary to control the length L of the exposed blade end surface of the embedded screw 230. If the length L is too long, the embedded screw 230 cannot be butt jointed with the steel structure, and if the length L is too long, the embedded screw 230 can interfere with other parts of the steel structure. Therefore, when the embedded screw 230 is screwed into the embedded nut 220, it is necessary to control the screwing length of the embedded screw 230, so as to control the length L of the exposed blade end surface of the embedded screw 230. In order to solve the problem, the embedded screw 230 is provided with a mark in the embodiment, so that the operator can consider that the embedded screw 230 is rotated in place by rotating to the mark.

[0049] Further, the thickness of the screw positioning plate 200 is 20mm~21.5mm.

[0050] Further, the connecting hole 210 and the side wall of the embedded nut 220 are coated with glue 500 to achieve sealing.

[0051] Further, the connecting hole 210 and the side wall of the embedded nut 220 are coated with glue 500 to achieve sealing.

[0052] Specifically, the embodiment realizes that the mold body 100 is a closed space by coating the glue 500. Because the mold body 100 needs to be vacuumized before pouring the glass fiber 300, it is necessary to ensure that the mold body 100 is a closed space.

[0053] Obviously, the above-mentioned embodiments are only examples for clearly illustrating, and are not limited to the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An apparatus for preparing a pre-buried screw-rod wind power blade, characterized in that: The utility model relates to a kind of embedded screw nut and embedded screw for steel structure, including: Mould body; Screw positioning plate is connected at the end surface of the mould body;Multiple connecting holes are arranged at the screw positioning plate, embedded nuts are detachably connected in the connecting holes, and the embedded nuts are sealingly connected with the connecting holes;Embedded screw is threadedly connected in the embedded nut, and the embedded nut is sealed with the embedded screw. Wherein, the mould body is filled with glass fiber, and the glass fiber is connected with the bottom end of the embedded screw after solidification;The top end of the embedded screw exposes the top of the screw positioning plate, and is connected with steel structure.

2. The device for preparing a pre-buried screw type wind power blade according to claim 1, characterized in that: The embedded nut is a hexagonal embedded nut;Correspondingly, the connecting hole is a hexagonal hole.

3. The device for preparing a pre-preg wind turbine blade according to claim 2, characterized in that: The gap between the side wall of the embedded nut and the connecting hole is 0.4-0.6mm.

4. The device for preparing a pre-buried screw type wind power blade according to claim 1, characterized in that: The mould body is provided with a fixed plate, and the fixed plate is arranged parallel below the screw positioning plate;The fixed plate and the screw positioning plate are detachably connected.

5. The device for preparing a pre-preg wind turbine blade according to claim 4, characterized in that: The fixed plate and the screw positioning plate are detachably connected by bolts.

6. The device for preparing a pre-buried screw type wind power blade according to claim 1, characterized in that: It also includes a locking assembly corresponding to the embedded nut, which is used to connect and fix the embedded nut and the screw positioning plate.

7. The device for manufacturing a pre-preg wind turbine blade according to claim 6, characterized in that: The locking assembly includes a connecting lock piece, a first bolt and a second bolt;The connecting lock piece is arranged on the top of the screw positioning plate;The first bolt is connected with the embedded nut through the connecting lock piece;The second bolt is connected with the screw positioning plate through the connecting lock piece.

8. The device for preparing a pre-preg wind turbine blade of claim 1, wherein: The embedded screw is provided with a mark.

9. The device for preparing a pre-preg wind turbine blade of claim 1, wherein: The thickness of the screw positioning plate is 20-21.5mm.

10. The device for preparing a pre-preg wind turbine blade of claim 1, wherein: Glue is coated on the side wall of the connecting hole and the embedded nut to achieve sealing; And / or, glue is coated on the connection between the embedded screw and the embedded nut to achieve sealing.