Power transmission angle steel tower complex node reinforcing member structure and preparation method thereof

Abstract

The invention belongs to the field of power transmission angle steel towers, and provides a power transmission angle steel tower complex node reinforcing member structure and a preparation method thereof in order to solve the problem that a traditional reinforcing structure is not suitable for power transmission angle steel tower complex nodes. The power transmission angle steel tower complex node reinforcing member structure comprises a first prefabricated module and a second prefabricated module; the first prefabricated module and the second prefabricated module are welded together to form a complete reinforcing member structure; the reinforcing part is of an axial symmetry structure; the first prefabricated module is formed by welding first angle steel, second angle steel and connecting angle steel in advance; the second angle steel is integrally welded on the inner side of the first angle steel, and one end of the connecting angle steel is welded on the inner side of the second angle steel; the second prefabricated module is formed by welding third angle steel and fourth angle steel in advance; the third angle steel is welded to the outer side of the connecting angle steel, and the fourth angle steel covers the third angle steel and is welded to the outer side of the third angle steel. The method is suitable for on-site reinforcement of complex nodes of the power transmission angle steel tower.

Description

Technical Field

[0001] The invention belongs to the field of power transmission angle steel towers, and in particular relates to a complex node reinforcement structure of a power transmission angle steel tower and a preparation method thereof. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In order to ensure the safety and stability of the power grid and to improve the carrying capacity of old transmission towers, the existing technology provides an L-shaped transmission angle steel tower reinforcement structure design using two layers of angle steel overlapped. The reinforcement angle steel is attached to the inner side of the main limb angle steel of the tower. For the first time, welding reinforcement is used to integrate the main limb angle steel and the reinforcement angle steel through metallurgical connection, thereby achieving the effect of improving the integrated strength of the transmission tower and effectively improving the overall safety of the transmission line.

[0004] Since the diagonal material can be removed when reinforcing the old 77 series transmission angle steel towers such as 7725 and 7727, and then installed after reinforcement, the traditional L-shaped transmission angle steel tower reinforcement structure with two layers of angle steel overlapped is suitable for the old 77 series transmission angle steel towers such as 7725 and 7727. However, for transmission angle steel towers with complex tower shapes and diverse main material node structures, if the diagonal material at the node is a large diagonal material, it is not allowed to be disassembled, and the reinforcement is difficult. The traditional L-shaped transmission angle steel tower reinforcement structure with two layers of angle steel overlapped cannot penetrate the reinforcement node position with bolts. Summary of the invention

[0005] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides a complex node reinforcement structure of a power transmission angle steel tower and a preparation method thereof, which can be applicable to on-site reinforcement of complex nodes of a power transmission angle steel tower.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A first aspect of the present invention provides a complex node reinforcement structure for a transmission angle steel tower.

[0007] A complex node reinforcement structure of a power transmission angle steel tower, comprising: A first prefabricated module and a second prefabricated module; the first prefabricated module and the second prefabricated module are welded together to form a complete reinforcement structure; the reinforcement structure is an axisymmetric structure as a whole; The first prefabricated module is pre-welded by a first angle steel, a second angle steel and a connecting angle steel; the second angle steel is integrally welded to the inner side of the first angle steel, and one end of the connecting angle steel is welded to the inner side of the second angle steel; the connecting angle steel is arranged on one side of a bolt cap at a reinforcement node on the inner side of the main limb angle steel; The second prefabricated module is pre-welded by a third angle steel and a fourth angle steel; the third angle steel is welded to the outer side of the other end of the connecting angle steel, and the third angle steel is completely overlap-welded to the inner side of the fourth angle steel.

[0008] As an implementation method, the wing plate width of the connecting angle steel is greater than the wing plate width of the main limb angle steel at the reinforcement node; The wing plate widths of the first angle steel and the fourth angle steel are the same and are greater than the wing plate width of the connecting angle steel; The wing plate widths of the second angle steel and the third angle steel are the same and are greater than the wing plate widths of the first angle steel and the fourth angle steel; The sum of the thicknesses of the first angle steel and the second angle steel is greater than or equal to the height of the bolt cap at the reinforcement node on the inner side of the main limb angle steel.

[0009] As an implementation mode, the second angle steel and the third angle steel have the same length, which is not less than 250 mm.

[0010] As an implementation mode, the two ends of the connecting angle steel are overlapped with the second angle steel and the third angle steel by the same length, both of which are not less than 150 mm.

[0011] As an embodiment, after deducting the overlap length of the second angle steel and the third angle steel from the total length of the connecting angle steel, the remaining length of the connecting angle steel is greater than the length of the edge of the reinforcement node, and the difference between the length of the remaining connecting angle steel and the length of the edge of the reinforcement node is 50 mm.

[0012] As an embodiment, the optimal sizes of the first angle steel, the second angle steel, the connecting angle steel, the third angle steel and the fourth angle steel in the reinforcement structure are determined by the expected strength values ​​of the reinforcement position points of the reinforcement structure; The expected strength value of the reinforcement position point is calculated based on a pre-constructed relationship and the environmental factors of the transmission angle steel tower; the environmental factors of the transmission angle steel tower include the temperature, humidity, acidity and alkalinity and weather information around the transmission angle steel tower.

[0013] As an implementation method, the pre-constructed relationship is: the relationship between the expected strength value of the reinforcement position point and the environmental factors of the transmission angle steel tower, which is fitted by the historical environmental factor data of the transmission angle steel tower and the expected strength value of the corresponding reinforcement position point.

[0014] As an implementation method, in the process of determining the sizes of the first angle steel, the second angle steel, the connecting angle steel, the third angle steel and the fourth angle steel in the reinforcement structure, the size combination parameters of the first angle steel, the second angle steel, the connecting angle steel, the third angle steel and the fourth angle steel are adjusted, and the corresponding reinforcement node strength is obtained according to the finite element analysis method, and then the corresponding reinforcement node strength is compared with the matching expected strength. When the corresponding reinforcement node strength is equal to the expected strength, the size combination parameters of the corresponding first angle steel, the second angle steel, the connecting angle steel, the third angle steel and the fourth angle steel are output and used as the design size.

[0015] As an implementation mode, the reinforcement nodes include a first node type and a second node type; The first node type is: there are three angle steels and the original reinforcement plate on the inner side of the main angle steel. The original reinforcement plate is fixed to two of the angle steels by bolts, and the other angle steel is located above the original reinforcement plate. The second type of node is: the main angle steel of the node is connected to the inner side with two diagonal materials arranged opposite to each other.

[0016] A second aspect of the present invention provides a method for preparing a complex node reinforcement structure of a transmission angle steel tower.

[0017] A method for preparing a complex node reinforcement structure of a power transmission angle steel tower, comprising: According to the type of the reinforcement node and the flange width of the main limb angle steel where it is located, determine the second angle steel and the third angle steel of the same size and the first angle steel and the fourth angle steel of the same size; wherein, the flange width of the second angle steel and the third angle steel is the same as the flange width of the main limb angle steel, and the length is not less than 250mm; the flange width of the first angle steel and the fourth angle steel is the same and both are smaller than the flange width of the second angle steel and the third angle steel; The first angle steel, the second angle steel and the connecting angle steel are pre-welded together to form a first prefabricated module; wherein the second angle steel is integrally welded to the inner side of the first angle steel, and one end of the connecting angle steel is welded to the inner side of the second angle steel; the wing plate width of the connecting angle steel is smaller than the wing plate widths of the first angle steel and the fourth angle steel; Pre-welding the third angle steel and the fourth angle steel to form a second prefabricated module; wherein the third angle steel is welded to the outer side of the other end of the connecting angle steel, and the third angle steel is completely overlap-welded to the inner side of the fourth angle steel; After the connecting angle steel of the first prefabricated module is arranged on one side of the bolt cap at the reinforcement node inside the main limb angle steel, the first prefabricated module is welded to the inside of the main limb angle steel, and then the connecting angle steel of the first prefabricated module is welded to the third angle steel of the second prefabricated module to form a complete reinforcement structure, and the reinforcement structure as a whole is an axisymmetric structure; Finally, the second prefabricated module is welded to the inner side of the main limb angle steel.

[0018] The beneficial effects of the present invention are: The present invention adopts a modular prefabricated design for the reinforcement structure of the complex nodes of the transmission angle steel tower, and the entire reinforcement structure is an axisymmetric structure. A connecting angle steel is arranged on one side of the bolt cap at the reinforcement node on the inner side of the main limb angle steel, so that there is no need to disassemble the diagonal material at the node of the transmission angle steel tower, which solves the problem that the reinforcement structure of the traditional two-layer angle steel overlap cannot penetrate the reinforcement node position with bolts. The invention is suitable for on-site reinforcement of the complex nodes of the transmission angle steel tower, and improves the strength of the transmission angle steel tower.

[0019] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] Figure 1 It is a three-dimensional diagram of a complex node reinforcement structure of a power transmission angle steel tower according to an embodiment of the present invention; Figure 2 It is a side view of a complex node reinforcement structure of a transmission angle steel tower according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a first prefabricated module according to an embodiment of the present invention; Figure 4 is a schematic structural diagram of a second prefabricated module according to an embodiment of the present invention; Figure 5 It is a flow chart of a method for preparing a complex node reinforcement structure of a transmission angle steel tower according to an embodiment of the present invention.

[0022] Among them, 1. The first angle steel; 2. The second angle steel; 3. The connecting angle steel; 4. The third angle steel; 5. The fourth angle steel. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] according to Figure 1 and Figure 2 The embodiment of the present invention provides a complex node reinforcement structure of a transmission angle steel tower, including: A first prefabricated module and a second prefabricated module; the first prefabricated module and the second prefabricated module are welded together to form a complete reinforcement structure; the reinforcement structure is an axisymmetric structure as a whole; The first prefabricated module is pre-welded by a first angle steel 1, a second angle steel 2 and a connecting angle steel 3. Figure 3 As shown; the second angle steel 2 is integrally welded to the inner side of the first angle steel 1, and one end of the connecting angle steel 3 is welded to the inner side of the second angle steel 2; the connecting angle steel 3 is arranged on one side of the bolt cap at the reinforcement node on the inner side of the main limb angle steel; The second prefabricated module is pre-welded by the third angle steel 4 and the fourth angle steel 5. Figure 4 As shown; wherein, the third angle steel 4 is welded to the outer side of the other end of the connecting angle steel 3, and the third angle steel 4 is completely overlap-welded to the inner side of the fourth angle steel 5.

[0027] It should be noted here that the first angle steel 1, the second angle steel 2, the connecting angle steel 3, the third angle steel 4 and the fourth angle steel 5 are made of steel with strength of Q355B or above, and are hot-rolled profiles. On the premise of ensuring qualified mechanical properties, the Mn% in the chemical composition is not less than 0.8%.

[0028] In the specific implementation process, the wing plate width of the connecting angle steel is greater than the wing plate width of the main limb angle steel at the reinforcement node. The wing plate widths of the first angle steel and the fourth angle steel are the same, which is greater than the wing plate width of the connecting angle steel. The wing plate widths of the second angle steel and the third angle steel are the same, which is greater than the wing plate widths of the first angle steel and the fourth angle steel.

[0029] In the specific implementation process, Figure 2As shown, the length L2 of the second angle steel 2 and the third angle steel 4 are the same, both of which are not less than 250 mm. The length L3 of the two ends of the connecting angle steel 3 overlapping the second angle steel 2 and the third angle steel 4 is the same, both of which are not less than 150 mm. After the total length of the connecting angle steel 3 minus the length overlapping the second angle steel 2 and the third angle steel 4, the length of the remaining connecting angle steel is greater than the length of the edge of the reinforcement node, and the difference between the length L1 of the remaining connecting angle steel and the length of the edge of the reinforcement node is 50 mm.

[0030] This can ensure a close fit between the reinforcement and the main limb angle steel, while increasing the cross-section of the main limb angle steel and improving the stress-bearing strength of the entire transmission angle tower.

[0031] In the specific implementation process, the sum of the thickness of the first angle steel 1 and the second angle steel 2 is greater than or equal to the height of the bolt cap at the reinforcement node inside the main limb angle steel. This solves the problem that the reinforcement structure of the traditional two-layer angle steel overlap cannot penetrate the reinforcement node position with bolts, is suitable for on-site reinforcement of complex nodes of the transmission angle steel tower, and improves the strength of the transmission angle steel tower.

[0032] In some specific embodiments, the optimal sizes of the first angle steel, the second angle steel, the connecting angle steel, the third angle steel and the fourth angle steel in the reinforcement structure are determined by the expected strength values ​​of the reinforcement position points of the reinforcement structure; The expected strength value of the reinforcement position point is calculated based on a pre-constructed relationship and the environmental factors of the transmission angle steel tower; the environmental factors of the transmission angle steel tower include the temperature, humidity, acidity and alkalinity and weather information around the transmission angle steel tower.

[0033] The pre-constructed relationship described here is: the relationship between the expected strength value of the reinforcement position point and the environmental factors of the transmission angle steel tower, which is obtained by fitting the historical environmental factor data of the transmission angle steel tower and the expected strength value of the corresponding reinforcement position point.

[0034] Specifically, in the process of determining the sizes of the first angle steel, the second angle steel, the connecting angle steel, the third angle steel and the fourth angle steel in the reinforcement structure: Adjust the size combination parameters of the first angle steel, the second angle steel, the connecting angle steel, the third angle steel and the fourth angle steel, and obtain the corresponding reinforcement node strength according to the finite element analysis method; Then, the strength of the corresponding reinforcement node is compared with the matching expected strength. When the strength of the corresponding reinforcement node is equal to the expected strength, the size combination parameters of the corresponding first angle steel, second angle steel, connecting angle steel, third angle steel and fourth angle steel are output and used as the design size.

[0035] The finite element analysis method here is a prior art, and those skilled in the art can analyze the corresponding strength value based on the node parameters of the transmission angle steel tower.

[0036] This embodiment determines the expected strength value of the reinforcement position point through the environmental factors of the transmission angle steel tower, and then matches the size of each component in the design reinforcement structure according to the expected strength value, thereby meeting the reinforcement strength requirements of the transmission angle steel tower in different environments and ensuring the reinforcement effect.

[0037] In one or more embodiments, the reinforcement nodes include a first node type and a second node type; The first node type is: there are three angle steels and the original reinforcement plate on the inner side of the main angle steel. The original reinforcement plate is fixed to two of the angle steels by bolts, and the other angle steel is located above the original reinforcement plate. The second type of node is: the main angle steel of the node is connected to the inner side with two diagonal materials arranged opposite to each other.

[0038] It should be noted here that the type of reinforcement node can be set specifically according to actual conditions and will not be described in detail here.

[0039] In one or more embodiments, Figure 5 As shown, a method for preparing a complex node reinforcement structure of a transmission angle steel tower is also provided, comprising: Step 1: According to the type of the reinforcement node and the flange width of the main limb angle steel where it is located, determine the second angle steel and the third angle steel of the same size and the first angle steel and the fourth angle steel of the same size; Step 2: pre-weld the first angle steel, the second angle steel and the connecting angle steel together to form a first prefabricated module; wherein the second angle steel is integrally welded to the inner side of the first angle steel, and one end of the connecting angle steel is welded to the inner side of the second angle steel; the wing plate width of the connecting angle steel is smaller than the wing plate widths of the first angle steel and the fourth angle steel; Step 3: pre-weld the third angle steel and the fourth angle steel to form a second prefabricated module; wherein the third angle steel is welded to the outer side of the other end of the connecting angle steel, and the third angle steel is completely overlapped and welded to the inner side of the fourth angle steel; Step 4: After the connecting angle steel of the first prefabricated module is arranged on one side of the bolt cap at the reinforcement node inside the main limb angle steel, the first prefabricated module is welded to the inside of the main limb angle steel, and then the connecting angle steel of the first prefabricated module is welded to the third angle steel of the second prefabricated module to form a complete reinforcement structure, and the reinforcement structure as a whole is an axisymmetric structure; Step 5: Finally, weld the second prefabricated module to the inside of the main limb angle steel.

[0040] In this embodiment, the reinforcement structure of the complex nodes of the transmission angle steel tower is designed with a modular prefabricated design, and the entire reinforcement structure is an axisymmetric structure. A connecting angle steel is arranged on one side of the bolt cap at the reinforcement node on the inner side of the main limb angle steel. In this way, there is no need to disassemble the diagonal material at the node of the transmission angle steel tower, which solves the problem that the reinforcement structure of the traditional two-layer angle steel overlap cannot penetrate the reinforcement node position with bolts. It is suitable for on-site reinforcement of complex nodes of the transmission angle steel tower and improves the strength of the transmission angle steel tower.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A complex node reinforcement structure of a power transmission angle steel tower, characterized in that: include: A first prefabricated module and a second prefabricated module; the first prefabricated module and the second prefabricated module are welded together to form a complete reinforcement structure; the reinforcement structure is an axisymmetric structure as a whole; The first prefabricated module is pre-welded by a first angle steel, a second angle steel and a connecting angle steel; the second angle steel is integrally welded to the inner side of the first angle steel, and one end of the connecting angle steel is welded to the inner side of the second angle steel; the connecting angle steel is arranged on one side of a bolt cap at a reinforcement node on the inner side of the main limb angle steel; The second prefabricated module is pre-welded by a third angle steel and a fourth angle steel; the third angle steel is welded to the outer side of the other end of the connecting angle steel, and the third angle steel is completely overlap-welded to the inner side of the fourth angle steel.

2. The complex node reinforcement structure of the transmission angle steel tower according to claim 1, characterized in that: The wing plate width of the connecting angle steel is greater than the wing plate width of the main limb angle steel at the reinforcement node; The wing plate widths of the first angle steel and the fourth angle steel are the same and are greater than the wing plate width of the connecting angle steel; The wing plate widths of the second angle steel and the third angle steel are the same and are greater than the wing plate widths of the first angle steel and the fourth angle steel; The sum of the thicknesses of the first angle steel and the second angle steel is greater than or equal to the height of the bolt cap at the reinforcement node on the inner side of the main limb angle steel.

3. The complex node reinforcement structure of the transmission angle steel tower according to claim 1, characterized in that: The second angle steel and the third angle steel have the same length, both not less than 250 mm.

4. The complex node reinforcement structure of the transmission angle steel tower according to claim 1, characterized in that: The two ends of the connecting angle steel are overlapped with the second angle steel and the third angle steel by the same length, both of which are not less than 150 mm.

5. The complex node reinforcement structure of the transmission angle steel tower according to claim 1, characterized in that: After deducting the overlap length of the second angle steel and the third angle steel from the total length of the connecting angle steel, the remaining length of the connecting angle steel is greater than the length of the edge of the reinforcement node, and the difference between the length of the remaining connecting angle steel and the length of the edge of the reinforcement node is 50 mm.

6. The complex node reinforcement structure of the transmission angle steel tower according to claim 1, characterized in that: The optimal sizes of the first angle steel, the second angle steel, the connecting angle steel, the third angle steel and the fourth angle steel in the reinforcement structure are determined by the expected strength values ​​of the reinforcement position points of the reinforcement structure; The expected strength value of the reinforcement position point is calculated based on a pre-constructed relationship and the environmental factors of the transmission angle steel tower; the environmental factors of the transmission angle steel tower include the temperature, humidity, acidity and alkalinity and weather information around the transmission angle steel tower.

7. The complex node reinforcement structure of the transmission angle steel tower according to claim 6, characterized in that: The pre-constructed relationship is: the relationship between the expected strength value of the reinforcement position point and the environmental factors of the transmission angle steel tower, which is obtained by fitting the historical environmental factor data of the transmission angle steel tower and the expected strength value of the corresponding reinforcement position point.

8. The complex node reinforcement structure of the transmission angle steel tower according to claim 6, characterized in that: In the process of determining the sizes of the first angle steel, the second angle steel, the connecting angle steel, the third angle steel and the fourth angle steel in the reinforcement structure, the size combination parameters of the first angle steel, the second angle steel, the connecting angle steel, the third angle steel and the fourth angle steel are adjusted, and the corresponding reinforcement node strength is obtained according to the finite element analysis method. Then, the corresponding reinforcement node strength is compared with the matching expected strength. When the corresponding reinforcement node strength is equal to the expected strength, the corresponding size combination parameters of the first angle steel, the second angle steel, the connecting angle steel, the third angle steel and the fourth angle steel are output and used as the design size.

9. The complex node reinforcement structure of the transmission angle steel tower according to claim 1, characterized in that: The reinforcement nodes include a first node type and a second node type; The first node type is: there are three angle steels and the original reinforcement plate on the inner side of the main angle steel. The original reinforcement plate is fixed to two of the angle steels by bolts, and the other angle steel is located above the original reinforcement plate. The second type of node is: the main angle steel of the node is connected to the inner side with two diagonal materials arranged opposite to each other.

10. A method for preparing a complex node reinforcement structure of a power transmission angle steel tower according to any one of claims 1 to 9, characterized in that: include: According to the type of the reinforcement node and the flange width of the main limb angle steel where it is located, the second angle steel and the third angle steel of the same size and the first angle steel and the fourth angle steel of the same size are determined; The first angle steel, the second angle steel and the connecting angle steel are pre-welded together to form a first prefabricated module; wherein the second angle steel is integrally welded to the inner side of the first angle steel, and one end of the connecting angle steel is welded to the inner side of the second angle steel; the wing plate width of the connecting angle steel is smaller than the wing plate widths of the first angle steel and the fourth angle steel; Pre-welding the third angle steel and the fourth angle steel to form a second prefabricated module; wherein the third angle steel is welded to the outer side of the other end of the connecting angle steel, and the third angle steel is completely overlap-welded to the inner side of the fourth angle steel; After setting the connecting angle steel of the first prefabricated module on one side of the bolt cap at the reinforcement node on the inner side of the main limb angle steel, the first prefabricated module is welded to the inner side of the main limb angle steel, and then the connecting angle steel of the first prefabricated module is welded to the third angle steel of the second prefabricated module to form a complete reinforcement structure, and the reinforcement structure as a whole is an axisymmetric structure and the second prefabricated module is welded to the inner side of the main limb angle steel.

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