Composite cross arm structure of power transmission tower

Abstract

A composite cross arm structure of a power transmission tower comprises a composite insulation traction structure, a cross arm cable-stayed structure and an insulation compression main material, one end of the cross arm cable-stayed structure and one end of the insulation compression main material are connected to the same side of a tower body, and the connecting point of the cross arm cable-stayed structure and the tower body is higher than the connecting point of the insulation compression main material and the tower body. The cross arm cable-stayed structure is connected with the other end, away from the tower body, of the insulation pressed main material. The composite insulation traction structure is connected to the insulation pressed main material and the tower body in a hoop mode. The composite insulation traction structure is additionally arranged on the lower plane of the composite cross arm, the rigidity and the bearing performance of the composite cross arm structure are improved, and the composite cross arm structure is used for the strain tower composite cross arm.

Description

Technical Field

[0001] The invention belongs to the technical field of wind resistance of composite cross arms of power transmission lines, and in particular relates to a composite cross arm structure of a power transmission iron tower. Background Art

[0002] High-performance fiber reinforced polymer (FRP) has attracted widespread attention due to its advantages such as high strength, light weight, corrosion resistance, durability and good electrical insulation properties.

[0003] The crossarm is a cantilever structure used to hang transmission lines on transmission line towers. Using composite materials to transform the crossarms of transmission lines can reduce the frequency of lightning breakdown, dirty flashover and other faults; reduce the height and width of the transmission corridor, and reduce the height and weight of the transmission tower; improve the structural strength and extend the service life of the structure; reduce operation and maintenance costs and improve economic benefits.

[0004] However, although the composite cross-arm has high tensile strength, its elastic modulus is low and its compressive strength is low. When composite cross-arms are used in areas with strong winds, they may deform too much, causing the safety distance of the conductors to not meet the requirements. Summary of the invention

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the present invention proposes a composite cross-arm structure of a transmission tower, comprising: a composite insulating tension structure, a cross-arm inclined-stayed structure and an insulating compressive main material, wherein one end of the cross-arm inclined-stayed structure and the insulating compressive main material are respectively connected to the same side of a tower body 1, wherein a connection point between the cross-arm inclined-stayed structure and the tower body 1 is higher than a connection point between the insulating compressive main material and the tower body 1, the other end of the cross-arm inclined-stayed structure and the insulating compressive main material away from the tower body 1 is connected to each other, and the composite insulating tension structure clamp is connected to the insulating compressive main material and the tower body 1.

[0006] Preferably, the insulating pressure-bearing main material comprises: a composite insulating pressure rod 3 and a component 5, wherein there are two composite insulating pressure rods 3, one end of each of the two composite insulating pressure rods 3 is connected to the tower body 1, and the other ends are respectively connected to the two ends of the component 5, and the distance between the two connection points where the two composite insulating pressure rods 3 are connected to one end of the tower body 1 is greater than the length of the component 5;

[0007] The middle section of the member 5 is connected to the cross arm diagonal structure;

[0008] The composite insulating pulling structure is located between the two composite insulating pressure rods 3 and is respectively connected to the two composite insulating pressure rods 3 by clamping hoops.

[0009] Preferably, the composite insulating pulling structure comprises: a first angle steel diagonal material 11, a second angle steel diagonal material 12, a composite insulating pull rod 10 and a plurality of clamp connection joints 14;

[0010] The plurality of clamp connection joints 14 are respectively arranged on the two composite insulating pressure rods 3, and the two ends of the first angle steel diagonal material 11 are respectively connected to the two composite insulating pressure rods 3 by the clamp connection joints 14, and one end of the composite insulating pull rod 10 is connected to the component 5, and the other end is connected to the first angle steel diagonal material 11;

[0011] There are two groups of the second angle steel oblique materials 12, one end of each of the two groups of the second angle steel oblique materials 12 is respectively connected to the clamp connection joints 14 at both ends of the first angle steel oblique materials 11, and the other ends of the two groups of the second angle steel oblique materials 12 are simultaneously connected to the tower body 1.

[0012] Preferably, a connecting member is provided between the second angle steel diagonal member 12 and the tower body 1, and the connecting member comprises: a node plate 13 and inner and outer double-wrapped angle steels 17;

[0013] One end of the node plate 13 is connected to the other end of the second angle steel diagonal material 12 away from the first angle steel diagonal material 11, and the other end of the node plate 13 is wrapped in one end of the inner and outer double-wrapped angle steel 17, and the right angle of the inner and outer double-wrapped angle steel 17 wraps the horizontal side material 16 of the tower diaphragm on the tower body 1.

[0014] Preferably, one end of the composite insulating pressure rod 3 connected to the tower body 1 is provided with a composite insulating pressure rod node connecting plate 6 and a cross-shaped connecting plug plate 7, and the composite insulating pressure rod 3 is fixedly connected to the tower body 1 through the composite insulating pressure rod node connecting plate 6 and the cross-shaped connecting plug plate 7.

[0015] Preferably, a UT-type connecting plate 8 is provided between the composite insulating pressure rod 3 and the component 5 , and the composite insulating pressure rod 3 is fixedly connected to the component 5 via the UT-type connecting plate 8 .

[0016] Preferably, the cross arm inclined structure comprises: a composite insulating inclined rod 2 and a T-shaped connecting joint 4; one end of the composite insulating inclined rod 2 is connected to the tower body 1 through the T-shaped connecting joint 4, and the other end of the composite insulating inclined rod 2 is connected to the component 5.

[0017] Preferably, a stiffening plate is welded to one side of the component 5, and the composite insulating inclined rod 2 is connected to the stiffening plate.

[0018] Preferably, a composite insulating inclined-stay node connection plate 15 is provided between the T-shaped connection joint 4 and the tower body 1;

[0019] One end of the composite insulating inclined-stayed rod node connecting plate 15 is connected to the tower body 1 , and the other end of the composite insulating inclined-stayed rod node connecting plate 15 is connected to the T-shaped connecting joint 4 .

[0020] Preferably, the T-shaped connecting joint 4 comprises two angle steels, one section of which is back-to-back connected to and clamps the composite insulating inclined rod node connecting plate 15 , and the other ends of the two angle steels are mounted on the composite insulating inclined rod 2 .

[0021] Compared with the closest prior art, the present invention has the following beneficial effects:

[0022] The present invention proposes a composite cross-arm structure, including: a composite insulating tension structure, a cross-arm inclined-stayed structure and an insulating compressive main material, wherein one end of the cross-arm inclined-stayed structure and the insulating compressive main material are respectively connected to the same side of the tower body 1, wherein the connection point of the cross-arm inclined-stayed structure and the tower body 1 is higher than the connection point of the insulating compressive main material and the tower body 1, the cross-arm inclined-stayed structure and the insulating compressive main material are connected to each other at the other end away from the tower body 1, and the composite insulating tension structure clamp is connected to the insulating compressive main material and the tower body 1; compared with the traditional composite cross-arm node, the cross-arm structure is easy to install and can be directly modified on the original iron tower. At the same time, the added composite insulating tension structure can improve the stiffness and bearing performance of the composite cross-arm structure, greatly improve the defect of excessive deformation of the original composite cross-arm, and can be used for the composite cross-arm of the tension tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A front view of a transmission tower composite cross-arm structure provided by the present invention;

[0024] Figure 2 A bottom view of a composite insulating pulling structure in a composite cross-arm structure of a transmission tower provided by the present invention;

[0025] Figure 3 A schematic diagram of fixing double-wrapped angle steel in a composite cross-arm structure of a transmission tower provided by the present invention;

[0026] Figure 4 A cross-shaped connecting plug plate of a composite cross-arm structure of a power transmission tower provided by the present invention;

[0027] Figure 5 A UT type connecting plug plate of a composite cross arm structure of a transmission tower provided by the present invention;

[0028] Figure 6 A top view of a cross arm cable-stayed structure in a composite cross arm structure of a transmission tower provided by the present invention;

[0029] Among them, 1-tower body, 2-composite insulating diagonal rod, 3-composite insulating compression rod, 4-T-shaped connecting joint, 5-component, 6-composite insulating compression rod node connecting plate, 7-cross-shaped connecting plug plate, 8-UT-type connecting plug plate, 9-angle steel connecting plate, 10-composite insulating rod, 11-first angle steel diagonal material, 12-second angle steel diagonal material, 13-node plate, 14-hoop connecting joint, 15-composite insulating diagonal rod node connecting plate, 16-horizontal material on the side of the tower cross diaphragm, 17-inner and outer double-wrapped angle steel. DETAILED DESCRIPTION

[0030] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0031] Embodiment 1:

[0032] like Figure 1 As shown, the present invention proposes a composite cross-arm structure of a transmission tower, comprising: a composite insulating tension structure, a cross-arm inclined-stayed structure and an insulating compressive main material, wherein one end of the cross-arm inclined-stayed structure and the insulating compressive main material are respectively connected to the same side of a tower body 1, wherein a connection point between the cross-arm inclined-stayed structure and the tower body 1 is higher than a connection point between the insulating compressive main material and the tower body 1, the other end of the cross-arm inclined-stayed structure and the insulating compressive main material away from the tower body 1 is connected to each other, and the composite insulating tension structure clamp is connected to the insulating compressive main material and the tower body 1.

[0033] Compared with traditional composite cross-arm nodes, this cross-arm structure is easy to install and can be directly modified on the original iron tower. At the same time, the added composite insulation tension structure can improve the stiffness and bearing capacity of the composite cross-arm structure, greatly improving the defect of excessive deformation of the original composite cross-arm, and can be used for composite cross-arms of tension towers.

[0034] The composite cross-arm structure proposed in the present invention can conveniently replace the iron cross-arms of the original old transmission line towers, reduce the length of the insulator string, reduce the width of the corridor, increase the distance between the conductor and the ground and the distance between the conductors, and improve the safety of line operation. At the same time, this composite cross-arm node form is easier to install than the traditional composite cross-arm node form, and can be directly modified on the original iron tower, which can improve the stiffness and bearing performance of the composite cross-arm structure, and can be used for the composite cross-arm of the tension tower.

[0035] like Figure 2 As shown, the insulating pressure-bearing main material includes: a composite insulating pressure rod 3 and a component 5, wherein there are two composite insulating pressure rods 3, one end of the two composite insulating pressure rods 3 is connected to the tower body 1, and the other ends are respectively connected to the two ends of the component 5, and the distance between the two connection points where the two composite insulating pressure rods 3 are connected to one end of the tower body 1 is greater than the length of the component 5;

[0036] The middle section of the member 5 is connected to the cross arm diagonal structure;

[0037] The composite insulating pulling structure is located between the two composite insulating pressure rods 3 and is respectively connected to the two composite insulating pressure rods 3 by clamping hoops.

[0038] Angle steel connecting plates 9 are also provided at both ends of the component 5 , and the component 5 and the composite insulating pressure rod 3 are connected via the angle steel connecting plates 9 .

[0039] Preferably, the composite insulating pulling structure comprises: a first angle steel diagonal material 11, a second angle steel diagonal material 12, a composite insulating pull rod 10 and a plurality of clamp connection joints 14;

[0040] The plurality of clamp connection joints 14 are respectively arranged on the two composite insulating pressure rods 3, and the two ends of the first angle steel diagonal material 11 are respectively connected to the two composite insulating pressure rods 3 by the clamp connection joints 14, and one end of the composite insulating pull rod 10 is connected to the component 5, and the other end is connected to the first angle steel diagonal material 11;

[0041] There are two groups of the second angle steel oblique materials 12, one end of each of the two groups of the second angle steel oblique materials 12 is respectively connected to the clamp connection joints 14 at both ends of the first angle steel oblique materials 11, and the other ends of the two groups of the second angle steel oblique materials 12 are simultaneously connected to the tower body 1.

[0042] For the plane where the composite insulating pulling structure is located, the arrangement of the first angle steel diagonal material 11 and the second angle steel diagonal material 12 can effectively improve the bearing performance and stiffness of the crossarm along the line direction. Although the two ends of the first angle steel diagonal material 11 are connected by clamps, due to the smaller end openings of the two composite insulating pressure rods 3, their own length limits their movement toward the ends. Due to the presence of the composite insulating pull rod 10, its movement toward the tower body is limited. At the same time, the second angle steel diagonal material 12 also plays a role in limiting its displacement; therefore, the first angle steel diagonal material 11 is connected by a clamp, which can make the connection more convenient and meet the force requirements. At the same time, the composite insulating pull rod 10 is an insulating pull rod, which can meet the insulation performance requirements, improve the structural strength, and extend the service life of the structure; reduce operation and maintenance costs and improve economic benefits.

[0043] like Figure 3 As shown, a connecting member is provided between the second angle steel diagonal member 12 and the tower body 1, and the connecting member comprises: a node plate 13 and inner and outer double wrapped angle steels 17;

[0044] One end of the node plate 13 is connected to the other end of the second angle steel diagonal material 12 away from the first angle steel diagonal material 11, and the other end of the node plate 13 is wrapped in one end of the inner and outer double-wrapped angle steel 17, and the right angle of the inner and outer double-wrapped angle steel 17 wraps the horizontal side material 16 of the tower diaphragm on the tower body 1.

[0045] The node plate 13 is installed in the inner and outer double angle steels 17 by plugging, which limits the range of movement of the composite insulating pulling structure in the vertical direction and increases the stability of the composite insulating pulling structure on the composite insulating pressure rod 3.

[0046] Preferably, one end of the composite insulating pressure rod 3 connected to the tower body 1 is provided with a composite insulating pressure rod node connecting plate 6 and a cross-shaped connecting plug plate 7, and the composite insulating pressure rod 3 is fixedly connected to the tower body 1 through the composite insulating pressure rod node connecting plate 6 and the cross-shaped connecting plug plate 7.

[0047] The structure of the cross-shaped connecting plug plate 7 is as follows Figure 4 shown.

[0048] Preferably, a UT-type connecting plate 8 is provided between the composite insulating pressure rod 3 and the component 5 , and the composite insulating pressure rod 3 is fixedly connected to the component 5 via the UT-type connecting plate 8 .

[0049] The structure of the UT type connecting plug board 8 is as follows Figure 5 shown.

[0050] It effectively improves the lateral stiffness of the main material of the composite cross-arm, fully utilizes the tensile performance and insulation performance of its pull rod, improves the bearing performance and deformation resistance of the composite cross-arm under strong winds, and can realize the application of composite cross-arms in tension towers.

[0051] Preferably, the component 5 and the UT type connecting plate 8 are connected by bolts.

[0052] The bolt connection facilitates the disassembly of the component 5 and the UT type connecting plug plate 8.

[0053] like Figure 6 As shown, the cross arm inclined structure includes: a composite insulating inclined rod 2 and a T-shaped connecting joint 4; one end of the composite insulating inclined rod 2 is connected to the tower body 1 through the T-shaped connecting joint 4, and the other end of the composite insulating inclined rod 2 is connected to the component 5.

[0054] One end of the composite insulating inclined tie rod 2 is connected to the composite insulating inclined tie rod node connection plate 15 through a component 5 and a T-shaped connection joint 4 .

[0055] Preferably, a stiffening plate is welded to one side of the component 5, and the composite insulating inclined rod 2 is connected to the stiffening plate.

[0056] The composite insulating inclined rod 2 is pulled by the stiffening plate to stabilize the tension of the composite cross arm.

[0057] Preferably, a composite insulating inclined-stay node connection plate 15 is provided between the T-shaped connection joint 4 and the tower body 1;

[0058] One end of the composite insulating inclined-stayed rod node connecting plate 15 is connected to the tower body 1 , and the other end of the composite insulating inclined-stayed rod node connecting plate 15 is connected to the T-shaped connecting joint 4 .

[0059] The use of composite materials to transform the crossarms of transmission lines can reduce the frequency of faults such as lightning breakdown and pollution flashover; reduce the height and width of transmission corridors, and reduce the height and weight of transmission towers.

[0060] Preferably, the T-shaped connecting joint 4 comprises two angle steels, one section of which is back-to-back connected to and clamps the composite insulating inclined rod node connecting plate 15 , and the other ends of the two angle steels are mounted on the composite insulating inclined rod 2 .

[0061] The clamping installation can prevent the composite insulating inclined-stayed rod node connecting plate 15 and the composite insulating inclined-stayed rod 2 from being offset from each other, thereby enhancing stability.

[0062] Embodiment 2:

[0063] A certain 110kV or 220kV transmission line tower in service has been in operation for a long time. The current design specifications have been improved, other buildings have been added around the tower, or the design wind speed in the area has changed, resulting in the bearing performance of the original tower crossarm not meeting the current specifications, or the distance between the ground wire and the ground is insufficient, or the distance to the building does not meet the requirements. At this time, the composite insulating crossarm structure proposed in this patent can be used to transform the iron crossarm of the old transmission angle steel tower in service. While using the original node plate, convenient construction can be achieved without dismantling the old tower. At the same time, the bearing performance of the crossarm is improved, the distance between the conductor and the ground is increased, and the corridor width is reduced.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the application, but these changes, modifications or equivalent substitutions are all within the protection scope of the claims to be approved.

Claims

1. A composite cross arm structure of a transmission tower, characterized in that: include: A composite insulating tension structure, a cross arm inclined structure and an insulating compression main material, wherein one end of the cross arm inclined structure and the insulating compression main material are respectively connected to the same side of a tower body (1), wherein the connection point between the cross arm inclined structure and the tower body (1) is higher than the connection point between the insulating compression main material and the tower body (1), the other ends of the cross arm inclined structure and the insulating compression main material away from the tower body (1) are connected to each other, and the composite insulating tension structure clamp is connected to the insulating compression main material and the tower body (1).

2. A composite cross arm structure of a power transmission tower as claimed in claim 1, characterized in that: The insulating pressure-bearing main material comprises: a composite insulating pressure rod (3) and a component (5), wherein there are two composite insulating pressure rods (3), one end of each of the two composite insulating pressure rods (3) is connected to the tower body (1), and the other ends are respectively connected to two ends of the component (5), and the distance between two connection points where the two composite insulating pressure rods (3) are connected to one end of the tower body (1) is greater than the length of the component (5); The middle section of the component (5) is connected to the cross arm diagonal structure; The composite insulating pulling structure is located between the two composite insulating pressure rods (3) and is respectively connected to the clamps of the two composite insulating pressure rods (3).

3. A composite cross arm structure of a power transmission tower as claimed in claim 2, characterized in that: The composite insulating pulling structure comprises: a first angle steel diagonal material (11), a second angle steel diagonal material (12), a composite insulating pull rod (10) and a plurality of clamp connection joints (14); The plurality of clamp connection joints (14) are respectively arranged on the two composite insulating pressure rods (3); the two ends of the first angle steel diagonal material (11) are respectively clamped and connected to the two composite insulating pressure rods (3) through the clamp connection joints (14); one end of the composite insulating pull rod (10) is connected to the component (5), and the other end is connected to the first angle steel diagonal material (11); Two groups of the second angle steel oblique materials (12) are provided, one end of each of the two groups of the second angle steel oblique materials (12) is respectively connected to the clamp connection joints (14) at both ends of the first angle steel oblique materials (11), and the other ends of the two groups of the second angle steel oblique materials (12) are simultaneously connected to the tower body (1).

4. A composite cross arm structure of a power transmission tower as claimed in claim 3, characterized in that: A connecting member is provided between the second angle steel diagonal member (12) and the tower body (1), the connecting member comprising: a node plate (13) and inner and outer double-wrapped angle steels (17); One end of the node plate (13) is connected to the other end of the second angle steel oblique material (12) away from the first angle steel oblique material (11), and the other end of the node plate (13) is wrapped inside one end of the inner and outer double wrapped angle steel (17), and the right angle of the inner and outer double wrapped angle steel (17) wraps the side horizontal material (16) of the tower diaphragm on the tower body (1).

5. A composite cross arm structure of a power transmission tower as claimed in claim 2, characterized in that: One end of the composite insulating pressure rod (3) connected to the tower body (1) is provided with a composite insulating pressure rod node connection plate (6) and a cross-shaped connection plug plate (7); the composite insulating pressure rod (3) is fixedly connected to the tower body (1) via the composite insulating pressure rod node connection plate (6) and the cross-shaped connection plug plate (7).

6. A composite cross arm structure of a transmission tower as claimed in claim 2, characterized in that: A UT-type connecting plug plate (8) is provided between the composite insulating pressure rod (3) and the component (5), and the composite insulating pressure rod (3) is fixedly connected to the component (5) via the UT-type connecting plug plate (8).

7. A composite cross arm structure of a power transmission tower as claimed in claim 2, characterized in that: The cross arm inclined structure comprises: a composite insulating inclined rod (2) and a T-shaped connecting joint (4); one end of the composite insulating inclined rod (2) is connected to the tower body (1) via the T-shaped connecting joint (4), and the other end of the composite insulating inclined rod (2) is connected to the component (5).

8. A composite cross arm structure of a power transmission tower as claimed in claim 7, characterized in that: A stiffening plate is welded to one side of the component (5), and the composite insulating inclined rod (2) is connected to the stiffening plate.

9. A composite cross arm structure of a power transmission tower as claimed in claim 7, characterized in that: A composite insulating inclined rod node connection plate (15) is provided between the T-shaped connection joint (4) and the tower body (1); One end of the composite insulating inclined-stayed rod node connection plate (15) is connected to the tower body (1), and the other end of the composite insulating inclined-stayed rod node connection plate (15) is connected to the T-shaped connection joint (4).

10. A composite cross arm structure of a power transmission tower as claimed in claim 9, characterized in that: The T-shaped connecting joint (4) comprises two angle steels, one section of which is back-to-back connected to and clamps the composite insulating inclined rod node connecting plate (15), and the other ends of the two angle steels are mounted on the composite insulating inclined rod (2).

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