Connection joint of tube-type truss structure, tube-type truss structure and wind turbine generator

Abstract

The utility model discloses a connecting joint of tube pipe type truss structure, tube pipe type truss structure and wind turbine unit, including first special-shaped board and second special-shaped board, are used for connecting at least two kinds of cylinder pipe. First special-shaped board contains the conical shell first curved surface part of centrally arranged and two sides symmetry's first flat portion, and the outer cylindrical surface of first class cylinder pipe is tangent to first flat portion, and second special-shaped board contains the second flat portion of centrally arranged and two sides symmetry's conical shell second curved surface part, and the end of first curved surface part and the end of two second curved surface parts splice constitute complete circular ring, are used for connecting second class cylinder pipe, and the side of second curved surface part is tangent to circular ring in the orthographic projection on circular ring plane, and special-shaped board can be by sheet metal material integral bending forming or multi-plate splicing. Compared with prior art, the utility model manufacturing is simple, can reduce cost, and can effectively guarantee the reliability of node.

Description

Technical Field

[0001] This utility model belongs to the field of wind power tower technology, specifically, it relates to the connection node of the tube truss structure, the tube truss structure and the wind turbine. Background Technology

[0002] Cylindrical truss structures are widely used in many fields due to their advantages such as simple structure, clear force distribution, and convenient construction. Such systems are usually composed of first-class cylindrical tubes (such as main columns and main beams) that serve as the main load-bearing components and second-class cylindrical tubes (such as diagonal braces and secondary beams) that perform auxiliary functions.

[0003] As a key component connecting different members, transmitting loads, and ensuring the integrity and stability of the structure, the performance of nodes directly affects the safety, reliability, economy, and construction efficiency of the entire support system.

[0004] Currently, the connection nodes between the first type of cylindrical tube and the second type of cylindrical tube mainly adopt the following two methods, but both have limitations to varying degrees: One type is the intersecting joint, which requires extremely high cutting precision, involves a large and complex welding workload, exhibits significant stress concentration, and poses a risk of poor fatigue performance. The other type is the cast joint, which requires mold casting, resulting in high costs, long production cycles, and the difficulty in completely avoiding casting defects. Therefore, there is an urgent need in this field for a novel connection joint for tube-tube truss structures to improve the economy, reliability, and safety of joint connections. Summary of the Invention

[0005] In view of this, the purpose of this utility model embodiment is to provide a connection node for a tube truss structure to solve at least one technical problem in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A connection node of a cylindrical truss structure is formed by splicing a first irregular plate (3) and a second irregular plate (4) to connect at least two types of cylindrical tubes, namely a first type of cylindrical tube (1) and a second type of cylindrical tube (2).

[0007] The first irregular plate (3) includes a first curved surface (5) and at least two first flat surfaces (6), which are respectively connected to the two sides or concave surfaces of the first curved surface (5).

[0008] The first planar portion (6) is tangent to the outer cylindrical surface of the first type of cylindrical tube (1), and the tangent is parallel to the direction of extension of the first type of cylindrical tube (1).

[0009] The second irregular plate (4) includes a second flat portion (8) and two second curved portions (7), which are respectively connected to the two sides of the second flat portion (8).

[0010] The end of the first curved surface (501) and the ends of the two second curved surfaces (701) form a complete ring; the orthographic projection of the first side (703) of the second curved surface on the plane of the ring is tangent to the ring; the ring is used to connect the second type of cylindrical tube (2).

[0011] The first curved surface (5) is part of a conical shell. The bottom edge (502) of the first curved surface is connected to the first type of cylindrical tube (1). The side edge (503) of the first curved surface is connected to the first side edge (601) of the first flat part.

[0012] The second side (602) of the first flat portion is spliced ​​with the first side (703) of the second curved portion, and the bottom edge (603) of the first flat portion is connected to the outer surface of the first type of cylindrical tube (1).

[0013] The second curved surface (7) is part of a conical shell; the bottom edge (702) of the second curved surface is connected to the first type of cylindrical tube (1), and the second side edge (704) of the second curved surface is connected to the side edge (802) of the second flat part.

[0014] The bottom edge (801) of the second flat part is connected to the first type of cylindrical tube (1).

[0015] Specifically, the first irregularly shaped plate (3) is composed of multiple independent plates spliced ​​together; or, the first irregularly shaped plate (3) is formed by bending the same plate as a whole.

[0016] Specifically, the axis of the first type of cylindrical tube (1) and the axis of the second type of cylindrical tube (2) together form the axial plane, and the first irregular plate (3) and the second irregular plate (4) are mirror symmetrical with respect to the axial plane.

[0017] Specifically, the connection between the ring and the second type of cylindrical tube (2) is by welding, lap joint, or bolt connection; when the connection between the ring and the second type of cylindrical tube (2) is by bolt connection, the circular flange provided at the ring is connected to the flange provided at the end of the second type of cylindrical tube (2).

[0018] Specifically, the thickness of the first irregular plate (3) and the second irregular plate (4) is not less than the thickness of the second type of cylindrical tube (2).

[0019] Specifically, the outer diameter of the first type of cylindrical tube (1) is not less than the outer diameter of the second type of cylindrical tube (2).

[0020] Specifically, the first type of cylindrical tube (1) may have radial and circumferential ribs provided at the weld connection position with the connection node.

[0021] In a second aspect, a tubular truss structure is provided, including the connection node of the tubular truss structure of the first aspect.

[0022] Thirdly, a wind turbine generator set is provided, including a tube-type truss structure as described in the second aspect.

[0023] The advantages and benefits of the technical solution adopted in this utility model are mainly reflected in the following aspects: Unlike conventional casting or intersecting welded joints, this utility model uses irregularly shaped plates spliced ​​together to form a shell structure. The shell can be formed by bending sheet metal materials or by processing them separately and then welding them together. The processing and manufacturing are simple, which can reduce costs and improve construction efficiency. The circular ring formed by the curved surface directly connects to the second type of cylindrical tube. The conical surface transition and the tangent plane feature allow the load to be smoothly and effectively transferred to the first type of cylindrical tube, which can effectively ensure the reliability of the node. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the connection node of a tube truss structure according to Embodiment 1 of this utility model.

[0025] Figure 2 This is an isometric view of the connection node of a tube truss structure according to Embodiment 1 of this utility model.

[0026] Figure 3 This is an exploded view of the connection node in Embodiment 1 of this utility model.

[0027] Figure 4 This is an exploded schematic diagram of the first irregular plate (3) of Embodiment 1 of this utility model.

[0028] Figure 5 This is a top view of the connection node of a tube truss structure according to Embodiment 1 of this utility model.

[0029] Figure 6 This is an exploded view of the second irregular plate (4) of Embodiment 1 of this utility model.

[0030] Figure 7 This is a circular planar front view of the connection node of a tube truss structure according to Embodiment 1 of this utility model.

[0031] Figure 8 This is a top view of the connection node of a tube truss structure according to Embodiment 1 of this utility model.

[0032] Figure 9 This is a schematic diagram of the connection node of three cylindrical tubes in a cylindrical truss structure according to an embodiment of the present invention.

[0033] Explanation of icon numbers: 1. Type I cylindrical tube; 2. Type II cylindrical tube; 3. First irregular plate; 4. Second irregular plate; 5. First curved section; 501. End of the first curved section; 502. Bottom edge of the first curved section; 503. Side edge of the first curved section; 6. First flat section; 601. First side edge of the first flat section; 602. Second side edge of the first flat section; 603. Bottom edge of the first flat section; 7. Second curved section; 701. End of the second curved section; 702. Bottom edge of the second curved section; 703. First side edge of the second curved section; 704. Second side edge of the second curved section; 8. Second flat section; 801. Bottom edge of the second flat section; 802. Side edge of the second flat section; 9. Type III cylindrical tube.

[0034] It is worth noting that the above figures are for illustrating the features of this utility model and are not intended to show any actual structure or reflect the dimensions, relative proportions, or other details of various components. To more clearly illustrate the principle of this utility model and to avoid unnecessary details obscuring its principles, the examples in the figures have been simplified. These illustrations will not cause inconvenience to those skilled in the art in understanding this utility model, while actual embodiments may include more modules or components. Detailed Implementation

[0035] To make the objectives and technical solutions of the present utility model clearer, the embodiments of the present utility model will be fully described below with reference to the accompanying drawings. This patent describes only a portion of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0036] Example 1: Implementation of the basic structure.

[0037] Combination Figure 1 and Figure 2 As shown, this utility model discloses a connection node for a cylindrical truss structure, including a first irregular plate (3) and a second irregular plate (4), for connecting a first type of cylindrical tube (1) and a second type of cylindrical tube (2).

[0038] Combination Figure 3 As shown, the connection node is formed by welding two irregularly shaped plates together.

[0039] Combination Figure 4As shown, the first irregular plate (3) is welded together by three sheet metal materials, including a first curved part (5) arranged in the center and a first flat part (6) symmetrically connected on both sides. The first curved part (5) is part of a conical shell, the first flat part (6) is a triangular plate, and the side (503) of the first curved part is welded and fixed to the first side (601) of the first flat part.

[0040] Combination Figure 5 As shown, the first planar part (6) is tangent to the outer cylindrical surface of the first type of cylindrical tube (1), and the tangent is parallel to the direction of extension of the first type of cylindrical tube (1). The tangent feature can optimize the load transfer, so that the first planar part (6) only bears compressive stress, avoids additional bending moment, and improves fatigue life.

[0041] Combination Figure 6 As shown, the second irregular plate (4) is made of three sheet metal materials welded together, including a second flat part (8) and a second curved part (7) symmetrically connected on both sides. The second curved part (7) is part of a conical shell. The second side (704) of the second curved part is welded to the side (802) of the second flat part.

[0042] Combination Figure 7 As shown, the end (501) of the first curved surface is joined with the ends (701) of the two second curved surfaces to form a complete ring, and the orthographic projection of the first side (703) of the second curved surface on the ring flange plane is tangent to the ring.

[0043] The circular flange is welded to the second type of cylindrical pipe (2) by bolts, which distributes the load evenly and avoids the transmission of bending moment.

[0044] The second side (602) of the first flat portion is welded to the first side (703) of the second curved portion.

[0045] Combination Figure 8 As shown, the bottom edge (502) of the first curved surface, the bottom edge (702) of the second curved surface, and the bottom edge (801) of the second flat surface are all cut along the intersection line and then fully welded to the outer surface of the first type of cylindrical tube (1).

[0046] Combination Figure 7 and Figure 8 As shown, the bottom edge (603) of the first planar part is welded to the outer surface of the first type of cylindrical tube (1), and its outer surface is strictly tangent to the outer cylindrical surface of the cylindrical tube.

[0047] Furthermore, the first irregular plate (3) is made by bending a single piece of sheet metal in one piece, which can reduce weld seams; Furthermore, radial stiffeners and circumferential stiffeners are welded at the weld seam between the first type of cylindrical tube (1) and the connecting node to improve the node stiffness.

[0048] Example 2: Three-pipe connection node.

[0049] Combination Figure 9 As shown, the connection node can also be used to connect two or more types of cylindrical tubes, such as a connection node for three cylindrical tubes. The connection node is used to connect the first type of cylindrical tube (1), the second type of cylindrical tube (2), and the third type of cylindrical tube (9) to realize the connection of multi-branch reducers. The specific implementation is similar to that in Example 1.

[0050] The novelty and advantages of the above technical solution: 1) Lightweight and economical: The shell structure made of sheet metal replaces the bulky cast joints, which significantly reduces the structural weight and material cost.

[0051] 2) Simple processing and short cycle: Irregularly shaped plates (especially the preferred integrally bent first irregularly shaped plate) can be made by conventional sheet metal cutting and bending processes, or by simple plate welding and splicing. The processing difficulty is low, the efficiency is high, and the production cycle is greatly shortened.

[0052] 3) Clear force transmission path and high reliability: The load of the second type of cylindrical tube is directly and completely transmitted through the circular flange interface; the load is smoothly and effectively transmitted to the first type of cylindrical tube (1) through the conical transition of the first curved part (5) and the second curved part (7) and the tangential connection between the first flat part (6) and the first type of cylindrical tube (1); the side projection of the second curved part (7) is tangential to the flange ring to ensure the smoothness of the transition and the continuity of the force flow.

[0053] 4) High adaptability: It can flexibly connect cylindrical pipes of different diameters and adapt to more complex multi-pipe connection needs through the splicing of plates.

[0054] To ensure strength, the thickness of the first irregular plate (3) and the second irregular plate (4) is not less than the thickness of the second type of cylindrical tube (2), and the outer diameter of the first type of cylindrical tube (1) is not less than the outer diameter of the second type of cylindrical tube (2).

[0055] In this invention, the welding quality of all welds must meet the relevant specifications and requirements, and must not be lower than the quality requirements of a Class II weld.

[0056] In the description of this utility model, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A connection node for a tube-type truss structure, characterized in that, It is constructed by splicing a first irregular plate (3) and a second irregular plate (4), and is used to connect at least two types of cylindrical tubes, namely a first type of cylindrical tube (1) and a second type of cylindrical tube (2). The first irregular plate (3) includes a first curved surface (5) and at least two first flat surfaces (6); the two first flat surfaces (6) are respectively connected to the two sides or the concave surface of the first curved surface (5); The first planar portion (6) is tangent to the outer cylindrical surface of the first type of cylindrical tube (1), and the tangent is parallel to the direction of extension of the first type of cylindrical tube (1); The second irregular plate (4) includes a second flat portion (8) and two second curved portions (7); the two second curved portions (7) are respectively connected to the two sides of the second flat portion (8); The end (501) of the first curved surface and the ends (701) of the two second curved surfaces form a complete ring; the orthographic projection of the first side (703) of the second curved surface on the plane of the ring is tangent to the ring; the ring is used to connect the second type of cylindrical tube (2). The first curved part (5) is part of a conical shell. The bottom edge (502) of the first curved part is connected to the first type of cylindrical tube (1). The side edge (503) of the first curved part is connected to the first side edge (601) of the first flat part. The second side (602) of the first flat portion is spliced ​​with the first side (703) of the second curved portion, and the bottom edge (603) of the first flat portion is connected to the outer surface of the first type of cylindrical tube (1); The second curved part (7) is part of a conical shell; the bottom edge (702) of the second curved part is connected to the first type of cylindrical tube (1), and the second side edge (704) of the second curved part is connected to the side edge (802) of the second flat part; The bottom edge (801) of the second planar portion intersects and connects with the first type of cylindrical tube (1).

2. The connection node of the tube truss structure according to claim 1, characterized in that, The first irregular plate (3) is composed of multiple independent plates spliced ​​together, or is formed by bending the same plate as a whole.

3. The connection node of the tube truss structure according to claim 1, characterized in that, The axis of the first type of cylindrical tube (1) and the axis of the second type of cylindrical tube (2) together form an axial plane, and the first irregular plate (3) and the second irregular plate (4) are mirror-symmetrical with respect to the axial plane.

4. The connection node of the tube truss structure according to claim 1, characterized in that, The connection between the ring and the second type of cylindrical tube (2) is by welding, lap joint, or bolt connection.

5. The connection node of the tube truss structure according to claim 4, characterized in that, When the connection between the ring and the second type of cylindrical tube (2) is a bolt connection, the circular flange provided at the ring is connected to the flange provided at the end of the second type of cylindrical tube (2).

6. The connection node of the tube truss structure according to claim 1, characterized in that, The thickness of the first irregular plate (3) and the second irregular plate (4) is not less than the thickness of the second type of cylindrical tube (2).

7. The connection node of the tube truss structure according to claim 1, characterized in that, The outer diameter of the first type of cylindrical tube (1) is not less than the outer diameter of the second type of cylindrical tube (2).

8. The connection node of the tube truss structure according to claim 1, characterized in that, The first type of cylindrical tube (1) is provided with radial ribs and circumferential ribs at the weld connection position with the connection node.

9. A cylindrical truss structure, characterized in that, It includes the connection nodes of the tube truss structure as described in any one of claims 1-8.

10. A wind turbine generator set, characterized in that, Includes the tubular truss structure as described in claim 9.

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