Attachment strut and tower crane

Abstract

The application relates to the field of building construction and discloses an attached support rod and a tower crane. The attached support rod comprises an angle steel column and end plates. The angle steel column comprises a plurality of sequentially arranged connecting angle steels. One of any two adjacent connecting angle steels is provided with a connecting notch, and the other connecting angle steel is provided with a connecting protrusion. The connecting notch and the connecting protrusion are matched in shape and are connected through a connecting inclined surface. The two end plates are oppositely arranged along the length direction of the angle steel column, and the two ends of the angle steel column correspond to the two end plates respectively. Through the matched connection of the connecting notch and the connecting protrusion and the connecting inclined surface welding, the overall structural strength and stability of the attached support rod are significantly enhanced. The short connecting angle steels are overlapped to form an angle steel column with a required length, and the heavy flange plates or ear plates and other accessories in the traditional lengthening mode are replaced. Therefore, the material utilization rate is greatly improved, and the waste of additional connecting parts is avoided.

Description

Technical Field

[0001] This application belongs to the field of building construction, and specifically relates to an attached strut and a tower crane. Background Technology

[0002] Attached struts are key support components used in construction engineering to enhance the stability of tall temporary structures such as tower cranes and construction derricks. Their main body typically employs a lattice design, constructed from angle steel and other profiles, and is rigidly connected to anchor the main structure to the building facade or foundation to resist wind loads and overturning moments. In current manufacturing technology, strut lengths are customized based on site conditions: when the required length does not exceed the maximum size of a single angle steel bar, it is manufactured as a single piece; when the required length exceeds the specification of a single angle steel bar, it is manufactured in sections, with sections rigidly connected by flange bolts or assembled by pin hinges. While this on-demand length production model meets structural requirements, it does not fully consider the matching issues of the material supply chain. Currently, the utilization rate of technical materials is low. Manufacturers need to purchase angle steel of specific lengths according to project requirements. When the specifications of the stock materials do not match the required dimensions, it is often necessary to purchase longer profiles and cut them, resulting in the accumulation of short materials and surplus materials from newly purchased materials, causing resource waste. Moreover, the segmented connection scheme is not economical. To achieve segmented assembly, heavy-duty flange plates or pin lugs are required, which significantly increases the weight of the connectors and manufacturing costs. Therefore, there is an urgent need for a strut that combines safety and efficient material utilization. Summary of the Invention

[0003] In view of at least one of the above-mentioned defects or deficiencies in the prior art, this application provides an attached strut and tower crane that achieves both connection strength and economy.

[0004] To achieve the above objectives, this application provides an attachment strut, the attachment strut comprising: An angle steel column includes a plurality of connecting angle steels arranged in sequence. One of any two adjacent connecting angle steels is provided with a connecting protrusion, and the other connecting angle steel is provided with a connecting notch. The connecting notch and the connecting protrusion are matched in shape and are connected by welding through a connecting bevel. End plates, two end plates are arranged opposite each other along the length of the angle steel column, and the two ends of the angle steel column are respectively connected to the two end plates.

[0005] In some embodiments, there are multiple angle steel columns, which are evenly spaced and connected to the end plate.

[0006] In some embodiments, the angle steel column has a connecting seam formed by welding between two adjacent connecting angle steels, the connecting seams on multiple angle steel columns are staggered, and the distance between any two connecting seams on the angle steel columns in the length direction of the angle steel column is not less than a first preset distance.

[0007] In some embodiments, the connecting angle steel includes two flanges, and the connecting bevel is disposed on the flanges.

[0008] In some embodiments, both of the folded edges are provided with the connecting bevels, which are used to form the connecting protrusions or the connecting notches.

[0009] In some embodiments, one of the two folded edges is provided with the connecting bevel, and the connecting surface of the other folded edge is perpendicular to the length direction of the folded edge.

[0010] In some embodiments, the minimum plane angle between the connecting inclined surface and the longitudinal axis of the angle steel column is a first angle, which is 30° to 45°.

[0011] In some embodiments, the attachment strut further includes: A reinforcing member is connected to any two adjacent connecting angle steels and covers the joint between the two adjacent connecting angle steels.

[0012] In some embodiments, the minimum distance between the two ends of the reinforcing member along its length and the connecting seam is not less than a second preset distance.

[0013] A second aspect of this application provides a tower crane including an attachment strut as described in any of the preceding claims.

[0014] Through the above technical solution, the overall structural strength and stability of the attached strut are significantly enhanced by the matching fit between the connecting notch and the connecting protrusion and the welding of the connecting bevel. The shape matching of the connecting notch and the connecting protrusion not only ensures the precise alignment of adjacent connecting angle steels and reduces assembly deviations, but also increases the weld length through the welding of the bevel, ensuring the connection strength between the connecting angle steels. At the same time, this connection method uses short connecting angle steels to overlap to form angle steel columns of the required length, replacing the heavy flange plates or ear plates and other accessories in the traditional lengthening method. This not only greatly improves the utilization rate of materials, avoids the waste of additional connecting parts, and reduces the weight and manufacturing cost of the structure itself, but also allows the strut to be flexibly adjusted in length according to actual needs, reducing the complexity of manufacturing, transportation and on-site installation. In addition, the fixed setting of the end plate provides a reliable end anchor point, which makes it easy for the strut to be directly attached to the frame or wall, enhancing the overall rigidity and durability of the structure and avoiding the risk of failure caused by stress concentration. The attached strut of this utility model optimizes production efficiency and installation reliability while ensuring high load-bearing capacity.

[0015] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of the attached support rod in this utility model; Figure 2 This is a side view of the attached support rod in this utility model; Figure 3 This is a schematic diagram of the angle steel column in this utility model; Figure 4 This is a schematic diagram of one of the connecting angle steels in this utility model; Figure 5 This is a schematic diagram showing another angle of one of the connecting angle steels in this utility model; Figure 6 for Figure 5 Enlarged view of A in the middle; Explanation of reference numerals in the attached figures 1. Angle steel column; 2. End plate; 3. Reinforcing member; 11. Connecting angle steel; 12. Connecting joint; 11a. Folded edge; 111. Connecting bevel; 112. Connecting surface; 113. Bevel. Detailed Implementation

[0017] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0018] The present application will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0019] like Figure 1 As shown, this application provides an attachment strut, which includes an angle steel column 1 and an end plate 2. The angle steel column 1 includes a plurality of connecting angle steels 11 arranged in sequence. Any two adjacent connecting angle steels 11 are provided with connecting protrusions, and the other connecting angle steel is provided with a connecting notch. The two connecting angle steels 11 are matched in shape at their joint and are welded together by connecting inclined surfaces 111. The two end plates 2 are arranged opposite each other along the length direction of the angle steel column 1, and the two ends of the angle steel column 1 are respectively connected to the two end plates 2.

[0020] The attachment strut provided by this utility model mainly consists of an angle steel column 1 and a pair of end plates 2. The angle steel column 1 is formed by connecting multiple connecting angle steels 11 in sequence. During assembly, adjacent connecting angle steels 11 are matched through a complementary connection mechanism of protrusions and notches. Specifically, the connecting protrusions are formed by cutting the end face of the connecting angle steel 11, and the connecting notches are formed by cutting the end face of the connecting angle steel 11. The connecting protrusions and connecting notches are matched in shape. After the two connecting angle steels 11 are fitted together, they are welded at the connecting inclined surface 111. The two connecting angle steels 11 are fixedly connected through welding, thereby establishing a solid force transmission section. Simultaneously, two end plates 2 are symmetrically arranged at both ends along the length of the angle steel column 1, directly connecting to the start and end points of the angle steel column 1, respectively, forming a complete support unit. The angle steel column 1 forms a continuous rigid member as a whole, while the welding point of the connecting inclined surface 111 acts as a stress dispersion hub, effectively optimizing the load distribution between the angle steels.

[0021] By matching the connecting notch and the connecting protrusion and welding the connecting bevel 111, the overall structural strength and stability of the attached strut are significantly enhanced. The shape matching of the connecting notch and the connecting protrusion not only ensures the precise alignment of adjacent connecting angle steels 11 and reduces assembly deviations, but also increases the weld length through the welding of the bevel, ensuring the connection strength between the connecting angle steels 11. At the same time, this connection method uses short connecting angle steels 11 to overlap each other to form angle steel columns 1 of the required length, replacing the heavy flange plates or ear plates and other accessories in the traditional lengthening method. This not only greatly improves the utilization rate of materials, avoids the waste of additional connecting parts, and reduces the weight and manufacturing cost of the structure itself, but also allows the strut to be flexibly adjusted in length according to actual needs, reducing the complexity of manufacturing, transportation and on-site installation. In addition, the fixed setting of the end plate 2 provides a reliable end anchor point, which makes it easy for the strut to be directly attached to the frame or wall, enhancing the overall rigidity and durability of the structure and avoiding the risk of failure caused by stress concentration. The attached strut of this utility model optimizes production efficiency and installation reliability while ensuring high load-bearing capacity.

[0022] In some embodiments, there are multiple angle steel columns 1, which are evenly spaced and connected to the end plate 2. The multiple angle steel columns 1 are arranged parallel to each other along the longitudinal direction of the end plate 2, maintaining a precise and uniform spacing. Specifically, each individual angle steel column 1 is still formed by overlapping multiple connecting angle steels 11 with connecting notches and connecting protrusions, while the two end plates 2 act as a common anchoring base. Both ends of all angle steel columns 1 are welded or bolted to the end plate 2 in a vertical position. The evenly spaced connection of multiple angle steel columns 1 to the end plate 2 can be understood to be a single or multiple rows of evenly spaced connections, a matrix-style evenly spaced connection, or an evenly spaced connection surrounding the edge of the end plate 2.

[0023] Multiple evenly spaced angle steel columns 1 significantly improve the overall bending stiffness and load distribution capacity of the attached struts. Because the multiple columns form a truss structure with coordinated force distribution under the constraint of the end plates 2, when the struts are subjected to lateral bending moments, the load is evenly transferred to all angle steel columns 1 through the end plates 2, significantly reducing the risk of excessive local stress in a single column. Simultaneously, the even distribution of angle steel columns 1 not only optimizes material distribution and reduces the self-weight of the components, but also provides unobstructed space for welding operations at critical welds, ensuring weld accessibility and quality stability. Modular lap joints allow for customization of any length, and the parallel arrangement of multiple columns significantly improves resistance to instability, effectively reducing material costs and manufacturing complexity. Furthermore, the uniform column spacing facilitates flexible assembly with other structures, further enhancing the project's applicability and reliability.

[0024] In some implementations, such as Figure 2As shown, the angle steel column 1 has a connecting seam 12 formed by welding two adjacent connecting angle steels 11. The connecting seams 12 on multiple angle steel columns 1 are staggered, and the distance between any two connecting seams 12 on the length of the angle steel column 1 is not less than a first preset distance L1. Each angle steel column 1 is formed by welding multiple connecting angle steels 11 together through connecting notches and connecting protrusions, and the connecting seams 12 are formed at the segmented joints. When multiple angle steel columns 1 are installed side by side, the connecting seams 12 on each column are designed to be staggered in the length direction, that is, the connecting seams 12 of adjacent columns are not in the same horizontal plane. In specific implementation, by precisely controlling the initial segment length of the connecting angle steels 11, it is ensured that the minimum distance between adjacent connecting seams 12 on any two angle steel columns 1 along the column axis is always not less than the first preset distance L1. The first preset distance L1 can be set according to the actual situation. To ensure that the connecting seams 12 are staggered, the first preset distance L1 can be set to 0.5m.

[0025] The forced staggered distribution and minimum spacing control of the connecting seams 12 optimize the mechanical performance and process reliability of the overall support structure. The staggered welds break the coplanarity of the weak sections of all angle steel columns 1, avoiding the simultaneous formation of strength troughs in specific cross-sections of multiple columns. When the load is transferred to the array of angle steel columns 1, the end plate 2 can divert stress to multiple paths through the staggered connecting seams 12, effectively dispersing the local stress concentration in the weld area and significantly reducing the risk of coordinated instability of multiple angle steel columns 1. The staggered connection seams 12 also provide ample operating space, avoiding the overlap of heat-affected zones when multiple columns are densely welded; at the same time, the preset distance ensures welding operation space, making weld quality inspection and repair easier to implement.

[0026] In some implementations, such as Figure 4 and Figure 5 As shown, the connecting angle steel 11 includes two flanges 11a, and a connecting bevel 111 is provided on the flanges 11a. Each connecting angle steel 11 includes two mutually perpendicular flanges 11a, and its connecting function is concentrated in the end structure design of the flanges 11a. Specifically, the connecting notch is formed by cutting an inclined notch at the end of the flange 11a, while the connecting protrusion is machined into a complementary protrusion at the corresponding position of the flange 11a of the opposing connecting angle steel 11. During assembly, when two adjacent connecting angle steels 11 are butted together, their connecting notches and connecting protrusions cooperate with each other through the connecting bevel 111 formed at the end of the flange 11a, and full welding is performed on the connecting bevel 111.

[0027] Integrating the connecting bevel 111 directly onto the flange 11a optimizes the force transmission path and structural efficiency. The flange 11a, as a natural bending rigidity unit of the angle steel, allows the weld depth to penetrate the entire thickness of the flange 11a through its bevel welding, ensuring uniform stress diffusion across the two flanges 11a and improving the weld connection strength. In specific implementations, such as... Figure 6As shown, a V-shaped welding bevel 113 can also be made on the connecting bevel 111, with an angle β of 30°~60°. The guiding bevel formed by the bevel 113 allows the weld pool to penetrate deeply into the interior of the connecting seam 12, significantly increasing the effective load-bearing area of ​​the weld fusion zone; at the same time, the angle of the bevel 113 disperses the welding stress into multi-directional components, reducing stress concentration at the corner of the folded edge 11a and reducing the risk of root cracking of the weld. A larger bevel 113 angle can be used for thicker folded edges 11a to accommodate more deposited metal and enhance the connection strength; a smaller angle can be used for thinner folded edges 11a to reduce the amount of welding heat input, effectively suppressing warping deformation of the folded edge 11a caused by local heating, and ensuring the overall straightness of the angle steel after splicing. The angle of the bevel 113 can be made according to the actual situation.

[0028] In some embodiments, both flanges 11a are provided with connecting bevels 111, which are used to form connecting protrusions or connecting notches. Each flange 11a has a connecting bevel 111 at a specific angle at its end, and these connecting bevels 111 are combined to form an integral connecting structure. Specifically, when the connecting angle steel 11 needs to form a connecting protrusion, the connecting bevels 111 of its two flanges 11a are inclined in opposite directions to form a wedge-shaped protrusion; when forming a connecting notch, the bevels of the two flanges 11a are inclined inwards relative to each other to form a V-shaped groove. When adjacent angle steels are assembled, the bevel of the flange 11a with the wedge-shaped protrusion is precisely inserted into the V-shaped groove bevel of the other angle steel, forming a synchronous fitting of the two flanges 11a. For example, in a standard angle steel, the end faces of its two flanges 11a are each cut with a 45° bevel, and the two bevels intersect at the edge of the angle steel end, together forming a complete connecting protrusion.

[0029] The design of the connecting bevel 111, which integrates the two folded edges 11a, enhances the mechanical reliability and assembly precision of the connection. The interlocking double connecting bevels 111 form a three-dimensional geometric constraint, achieving axial positioning before welding and preventing misalignment on one side. During welding, the molten metal forms an annular penetration zone along the double bevels, allowing the load on the two folded edges 11a to be transferred bidirectionally, thus improving bending stiffness compared to a single bevel design. The symmetrical distribution of the bevels balances the welding heat input, effectively suppressing torsional deformation of the angle steel caused by asymmetrical heating and ensuring the straightness of the multi-segment splicing.

[0030] In some implementations, such as Figure 1As shown, one of the two flanges 11a has a connecting bevel 111, and the connecting surface 112 of the other flange 11a is perpendicular to the length direction of the flange 11a. The two flanges 11a of the connecting angle steel 11 adopt a differentiated design, that is, the end of one flange 11a is processed into a connecting bevel 111 at a specific angle, while the end face of the other flange 11a remains perpendicular to the length direction of the flange 11a, forming a flat right-angle connecting surface 112. During assembly, when two adjacent connecting angle steels 11 are butted together, the flange 11a with the connecting bevel 111 forms an inclined mating interface with the corresponding connecting bevel 111 of the other connecting angle steel 11, while the vertical connecting surface 112 directly fits against the corresponding vertical connecting surface 112 of the adjacent connecting angle steel 11. For example, in the combination of connecting notch and connecting protrusion, the beveled edge 11a of the protruding angle steel is embedded in the matching connecting bevel 111 of the groove angle steel, and its vertical connecting surface 112 is closely fitted with the vertical connecting surface 112 of the groove angle steel, forming a dual-fit structure of bevel guidance and vertical bearing.

[0031] The asymmetrical flange 11a design combines the advantages of assembly efficiency and structural performance. The vertical end face serves as a rigid support base, providing a stable axial positioning reference before welding and avoiding the risk of axial slippage during bevel fitting. The bevel structure guides the angle steel to quickly align radially, significantly reducing assembly deviations. During welding, the vertical end face and the bevel form a complementary force mechanism. The vertical end face bears the main axial pressure, while the bevel weld focuses on resisting shear and bending moments, effectively dispersing stress types. Simultaneously, the individual flange 11a is equipped with a connecting bevel 111, simplifying the process and reducing machining complexity. Furthermore, the directional filling of the weld metal is achieved by controlling the vertical surface gap.

[0032] In some implementations, such as Figure 5 As shown, the minimum plane angle between the connecting inclined surface 111 and the longitudinal axis of the angle steel column 1 is the first included angle α, which is 30°~45°. The connecting inclined surface 111 is located at the end of the folded edge 11a of the connecting angle steel 11. If an inclined connecting inclined surface 111 is cut and machined at the end of the folded edge 11a, the connecting inclined surface 111 and the longitudinal axis of the angle steel column 1 form two spatial angles, one acute and one obtuse. The acute angle formed is the first included angle α, and the first included angle α is between 30° and 45°. For example, when machining a connecting notch on the vertical folded edge 11a of the L-shaped angle steel, the inclined surface formed by the bottom of the groove forms an acute angle of 45° with the axis of the angle steel column 1, and at the same time forms an obtuse angle of 135°. This acute angle is the first included angle α, and its angle is precisely controlled by machining.

[0033] When the first included angle α is within the range of 30° to 45°, the weld pool can penetrate deeply into the angle steel body along the inclined plane, achieving the optimal fusion zone depth. When the connecting inclined plane 111 is subjected to axial pressure, the load is decomposed into compressive stress along the normal direction of the inclined plane and shear component in the tangential direction, significantly improving the fatigue resistance of the weld. At the same time, smaller angles (such as 30°) enhance shear resistance, while larger angles (such as 45°) improve compressive stability, reducing the deformation of the connection under dynamic loads such as wind vibration.

[0034] In some embodiments, the attachment strut also includes a reinforcing member 3, which connects to any two adjacent connecting angle steels 11 and covers the connecting seam 12 between the two adjacent connecting angle steels 11. After the two adjacent connecting angle steels 11 complete the bevel welding to form the connecting seam 12 through matching connecting notches and connecting protrusions, a strip-shaped reinforcing member 3 is installed on the connecting seam 12. The reinforcing member 3 simultaneously spans and presses against the folded edges 11a of the two adjacent angle steels, and its length covers the entire area of ​​the connecting seam 12. In specific implementations, the reinforcing member 3 can be a plate or a reinforcing angle steel. If it is a reinforcing angle steel, the specification of the reinforcing angle steel is smaller than that of the connecting angle steel 11, and a welding gap is reserved between the reinforcing member 3 and the edge of the connecting angle steel 11. The reinforcing member 3 is welded and fixed to the connecting angle steel 11 along the edge. The weld is required to be ground smooth, pass the weld flaw detection, and have no obvious welding marks on the surface. The reinforcing member 3 diffuses the stress of the point weld in the connection seam 12 area into a surface load. When the attached strut is subjected to lateral impact load, the reinforcing member 3 absorbs energy through its own rigid body, reducing the risk of fatigue cracks initiating at the root of the weld. The reinforcing member 3 forms a physical isolation for the connection seam 12, preventing corrosive media from penetrating into the weld microcracks.

[0035] In some implementations, such as Figure 3 As shown, the minimum distance between the two ends of the reinforcing member 3 along its length and the connecting seam 12 is not less than the second preset distance L2. When the reinforcing member 3 covers the adjacent connecting angle steel 11, the reinforcing member 3 is installed close to the connecting seam 12, and its two ends along its length need to extend a certain distance beyond the area of ​​the connecting seam 12. Since the connecting seam 12 is a spatial inclined interface formed by welding along the connecting inclined surface 111, the two ends of the reinforcing member 3 are at different distances from the connecting seam 12, but the minimum distance between the two ends of the reinforcing member 3 and the connecting seam 12 is not less than the second preset distance L2. In specific implementation, the second preset distance L2 can be set according to actual needs, and is generally set to 5cm. The extended coverage at both ends of the reinforcing member 3 forms a physical crack-resistant zone. When a micro-crack occurs at the root of the connecting seam 12, the crack must break through the coverage area of ​​the connecting member, blocking the unstable cracking path along the connecting seam 12, and ensuring that the mechanical properties of the angle steel column 1 are not damaged.

[0036] The second aspect of this utility model provides a tower crane, including the attachment struts as described above. In the embodiment provided by this utility model, in order to ensure the connection strength of the angle steel column 1, each angle steel column 1 includes two connecting angle steels 11, and the end plate 2 is set as square. Taking the attachment strut including 4 angle steel columns 1 as an example, in order to ensure uniform force distribution, the 4 angle steel columns 1 are respectively set at the 4 corners of the square end plate 2.

[0037] The attached strut and tower crane provided by this utility model include an attached strut comprising an end plate 2 and an angle steel column 1. The angle steel column 1 includes connecting angle steels 11 arranged sequentially. The connecting angle steels 11 are connected by a matching notch and a connecting protrusion and welded to a connecting inclined surface 111, which significantly enhances the overall structural strength and stability of the attached strut. The matching shape of the connecting notch and the connecting protrusion not only ensures the precise alignment of adjacent connecting angle steels 11 and reduces assembly deviation, but also increases the weld length through the welding of the inclined surface, ensuring the connection strength between the connecting angle steels 11. At the same time, this connection method uses short connecting angle steels 11 to overlap each other to form an angle steel column 1 of the required length, replacing the heavy flange plates or ear plates and other accessories in the traditional lengthening method. This not only greatly improves the utilization rate of materials, avoids the waste of additional connecting parts, and reduces the weight and manufacturing cost of the structure itself, but also allows the strut to be flexibly adjusted in length according to actual needs, reducing the complexity of manufacturing, transportation and on-site installation. Furthermore, the fixed installation of end plate 2 provides a reliable end anchor point, facilitating direct attachment of the strut to the frame or wall, enhancing the overall rigidity and durability of the structure, and avoiding the risk of failure due to stress concentration. This invention's attached strut, while ensuring high load-bearing capacity, also optimizes production efficiency and installation reliability.

[0038] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0041] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An attachment strut, characterized in that, The attachment strut includes: Angle steel column (1) includes a plurality of connecting angle steels (11) arranged in sequence. One of any two adjacent connecting angle steels (11) is provided with a connecting protrusion, and the other connecting angle steel (11) is provided with a connecting notch. The connecting notch and the connecting protrusion are matched in shape and are welded together by a connecting bevel (111). End plates (2), two end plates (2) are arranged opposite each other along the length direction of the angle steel column (1), and the two ends of the angle steel column (1) are respectively connected to the two end plates (2).

2. The attachment strut according to claim 1, characterized in that, The number of angle steel columns (1) is multiple, and the multiple angle steel columns (1) are evenly spaced and connected to the end plate (2).

3. The attachment strut according to claim 2, characterized in that, The angle steel column (1) has a connecting seam (12) formed by welding two adjacent connecting angle steels (11). The connecting seams (12) on multiple angle steel columns (1) are staggered, and the distance between any two connecting seams (12) on the angle steel column (1) in the length direction of the angle steel column (1) is not less than a first preset distance.

4. The attachment strut according to claim 1, characterized in that, The connecting angle steel (11) includes two flanges (11a), and the connecting inclined surface (111) is disposed on the flanges (11a).

5. The attachment strut according to claim 4, characterized in that, Both of the folded edges (11a) are provided with the connecting bevel (111), and the two connecting bevels (111) are used to form the connecting protrusion or the connecting notch.

6. The attachment strut according to claim 4, characterized in that, One of the two folded edges (11a) is provided with the connecting inclined surface (111), and the connecting surface (112) of the other folded edge (11a) is perpendicular to the length direction of the folded edge (11a).

7. The attachment strut according to any one of claims 1 to 6, characterized in that, The minimum plane angle between the connecting inclined plane (111) and the longitudinal axis of the angle steel column (1) is the first angle, which is 30°~45°.

8. The attachment strut according to any one of claims 1 to 6, characterized in that, The attachment strut also includes: The reinforcing member (3) is connected to any two adjacent connecting angle steels (11) and covers the connecting seam (12) between the two adjacent connecting angle steels (11).

9. The attachment strut according to claim 8, characterized in that, The minimum distance between the two ends of the reinforcing member (3) in the length direction and the connecting seam (12) is not less than the second preset distance.

10. A tower crane, characterized in that, Includes the attachment strut as described in any one of claims 1-9.

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