Power transmission tower

Abstract

The utility model provides a power transmission tower, the power transmission tower comprises a tower body and a composite cross arm arranged on the tower body, the composite cross arm comprises a cable-stayed insulator, a post insulator and a node fitting, the first ends of the post insulator and the cable-stayed insulator are connected with the tower body, the second ends of the post insulator and the cable-stayed insulator are connected together through the node fitting, and the node fitting comprises a horizontal connecting plate and a vertical connecting plate, the first surface is used for connecting a second end of the post insulator and comprises a first surface and a second surface which are arranged oppositely; the cable-stayed connecting assembly is mounted on the first surface and is used for connecting a second end of the cable-stayed insulator; the wire hanging assembly is mounted on the second surface; the horizontal connecting plate and the cable-stayed connecting assembly are detachably connected, and the horizontal connecting plate and the cable hanging assembly are detachably connected. The above design enables the installation of the node fitting to be more flexible, and reduces the manufacturing and installation cost.

Description

Technical Field

[0001] The present application relates to the field of power transmission technology, and in particular to a power transmission tower. Background Art

[0002] In transmission towers, node fittings usually connect insulators and hanging wires. However, current node fittings are complex in structure, heavy in weight and high in cost. On the other hand, the length of the crossarm and the width of the tower body connected to it cannot be adjusted during installation. The installation procedure is cumbersome, resulting in complex construction and uncontrollable errors. Utility Model Content

[0003] In view of this, the present application provides a transmission tower that can simplify the structure of node hardware, facilitate adjustment of the connection angle between the crossarm and the tower body, and reduce manufacturing and installation costs.

[0004] In order to solve the above problems, the present application provides a transmission tower, which includes a tower body and a composite crossarm arranged on the tower body, the composite crossarm including a diagonal insulator, a support insulator and a node hardware, the first ends of the support insulator and the diagonal insulator are connected to the tower body, and the second ends are connected together through the node hardware, the node hardware includes: a horizontal connecting plate, used to connect the second end of the support insulator, including a first surface and a second surface arranged opposite to each other; a diagonal connection assembly, installed on the first surface, used to connect the second end of the diagonal insulator; a hanging wire assembly, installed on the second surface; wherein the horizontal connecting plate and the diagonal connection assembly, as well as the horizontal connecting plate and the hanging wire assembly are all detachably connected.

[0005] The present application sets up detachable connections between the horizontal connecting plate and the inclined-stayed connecting assembly, and between the horizontal connecting plate and the hanging wire assembly. On the one hand, it can be convenient to change and simplify the structure of the node hardware according to actual conditions, thereby reducing manufacturing and installation costs; on the other hand, the node hardware can adjust the connection angle between the composite crossarm and the tower body, making the installation and adjustment of the composite crossarm flexible and easy.

[0006] According to some embodiments of the present application, a plurality of first connection holes are provided on the horizontal connection plate, and the plurality of first connection holes penetrate the first surface and the second surface, and a plurality of second connection holes corresponding to the plurality of first connection holes are provided on the end surfaces where the inclined connection assembly and the hanging wire assembly are connected to the first surface and the second surface. The above arrangement can facilitate the mutual connection between the inclined connection assembly, the horizontal connection plate, and the hanging wire assembly, while ensuring a stable connection.

[0007] According to some embodiments of the present application, a first construction hole and a first mounting hole are provided on the inclined-stayed connection assembly, and the first mounting hole is used to install the inclined-stayed insulator. The above arrangement can ensure the installation of the inclined-stayed insulator on the one hand, and can also improve the convenience of installation and maintenance on the other hand.

[0008] According to some embodiments of the present application, the inclined-stayed connection assembly includes two mutually connected inclined-stayed connection plates, each inclined-stayed connection plate is L-shaped, and each inclined-stayed connection plate is disposed on the first surface in opposite directions. The above arrangement can facilitate the assembly of the node hardware and improve the adaptability of the node hardware to different cross-arm structures.

[0009] According to some embodiments of the present application, a second mounting hole is provided on the horizontal connecting plate for mounting the post insulator. The above arrangement can ensure the installation of the post insulator.

[0010] According to some embodiments of the present application, a first wire hanging hole and a second construction hole are provided on the wire hanging assembly. The above arrangement can facilitate the node hardware to mount the wire, and also facilitates construction and maintenance.

[0011] According to some embodiments of the present application, the node hardware further includes a shielding ring mounted on the first surface or the second surface, and at least one connecting bracket is protruding from the shielding ring, and the connecting bracket is connected to the first surface or the second surface. The shielding ring can balance the voltage, thereby protecting the node hardware.

[0012] According to some embodiments of the present application, the wire hanging assembly includes two interconnected wire hanging plates, the two wire hanging plates are L-shaped, and the two wire hanging plates are arranged on the second surface with their backs facing each other. The above arrangement can further facilitate the assembly of the node hardware and improve the adaptability of the node hardware to different cross arm structures.

[0013] According to some embodiments of the present application, the connection surfaces of the two inclined connection plates, the connection surfaces of the two hanging wire plates and the symmetry plane of the horizontal connection plate are located in the same plane. The above arrangement can ensure that the node hardware is subjected to balanced force.

[0014] According to some embodiments of the present application, the transmission tower further includes: a first hinge, connecting the first end of the support insulator and the tower body, so that the support insulator can rotate relative to the tower body; a second hinge, connecting the first end of the inclined insulator and the tower body, so that the inclined insulator can rotate relative to the tower body. The arrangement of the first hinge and the second hinge can make the composite cross arm rotate relative to the tower body after the support insulator breaks, thereby releasing excessive unbalanced tension through rotation, protecting the tower body, and preventing the tower body from being damaged.

[0015] Beneficial effects of the present application: The present application sets up detachable connections between the horizontal connecting plate and the inclined-stayed connecting assembly, and between the horizontal connecting plate and the hanging wire assembly. On the one hand, it can be convenient to change and simplify the structure of the node hardware according to actual conditions, thereby reducing manufacturing and installation costs; on the other hand, the node hardware can adjust the connection angle between the crossarm and the tower body, making the installation and adjustment of the composite crossarm flexible and easy.

[0016] Furthermore, the diagonal connection assembly includes two interconnected diagonal connection plates, and the wire hanging assembly includes two interconnected wire hanging plates, which can facilitate the assembly of node hardware and improve the adaptability of node hardware to different cross arm structures.

[0017] Furthermore, the provision of the shielding ring can balance the voltage, thereby protecting the node hardware.

[0018] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0020] Figure 1 is a schematic structural diagram of a transmission tower 10 according to an embodiment of the present application;

[0021] Figure 2 yes Figure 1 A schematic diagram of the structure of the mid-node fitting 230;

[0022] Figure 3 yes Figure 1 A schematic structural diagram of the middle composite cross arm 200. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] See also Figure 1 The present application provides a transmission tower 10, which includes a tower body 100 and a composite cross arm 200 arranged on the tower body 100, the composite cross arm 200 includes a post insulator 210, a diagonal insulator 220 and a node hardware 230, the first ends of the post insulator 210 and the diagonal insulator 220 are connected to the tower body 100, and the second ends are connected together through the node hardware 230.

[0025] Specifically, the tower body 100 may be a transmission tower structure of a common structure such as a lattice iron tower, a pole body or a composite pole tower. A composite cross arm 200 (such as Figure 1 As shown), composite cross arms 200 may also be provided on multiple sides of the tower body 100. Among them, one side of the tower body 100 may be provided with a composite cross arm 200 (as shown Figure 1 As shown), a plurality of composite cross arms 200 may also be arranged at intervals along the vertical direction.

[0026] The composite cross arm 200 includes a post insulator 210, a diagonal insulator 220 and a node fitting 230. The post insulator 210 and the diagonal insulator 220 are located on the same side of the tower body 100, and the diagonal insulator 220 is located above the post insulator 210. The first end of the post insulator 210 is connected to the tower body 100, and the second end is connected to the node fitting 230. The first end of the diagonal insulator 220 is connected to the tower body 100, and the second end is connected to the node fitting 230. The node fitting 230 connects the post insulator 210 and the diagonal insulator 220 together to form the end of the composite cross arm 200 for hanging the conductor.

[0027] In one application scenario, the number of post insulators 210 is two, and the number of inclined insulators 220 is one (eg Figure 1 In another application scenario, the number of post insulators is one and the number of diagonal insulators is two; in another application scenario, the number of post insulators is one and the number of diagonal insulators is also one. In summary, the present application does not limit the number of post insulators 210 and diagonal insulators 220.

[0028] Combination Figure 1 and Figure 2 The node fitting 230 includes a horizontal connecting plate 231 for connecting the post insulator 210, a diagonal connecting assembly 232 for connecting the diagonal insulator 220, and a hanging wire assembly 233 for hanging the conductor. The horizontal connecting plate 231 and the diagonal connecting assembly 232, and the horizontal connecting plate 231 and the hanging wire assembly 233 are all detachably connected. The post insulator 210 and the diagonal insulator 220 are connected to the horizontal connecting plate 231 and the diagonal connecting assembly 232 respectively, instead of being connected to the same connecting component of the node fitting 230, which can avoid the same position on the node fitting 230 from being stressed and improve the service life of the node fitting 230. At the same time, the components of the node fitting 230 are detachably connected, that is, each component can be produced independently and assembled according to actual construction requirements, which reduces processing errors and improves the flexibility of crossarm installation. At the same time, it can be directly replaced after a certain component is damaged, avoiding the overall replacement of the node fitting, which greatly saves maintenance costs and maintenance cycles.

[0029] The horizontal connecting plate 231 is a plate-shaped member, and includes a first surface 231A and a second surface 231B that are arranged opposite to each other. The inclined connecting assembly 232 is installed on the first surface 231A, and the hanging wire assembly 233 is installed on the second surface 231B. Specifically, the horizontal connecting plate 231 is provided with a plurality of first connecting holes (not shown), and the plurality of first connecting holes penetrate the first surface 231A and the second surface 231B. The end surfaces where the inclined connecting assembly 232 and the hanging wire assembly 233 are connected to the first surface 231A and the second surface 231B are provided with a plurality of second connecting holes 2323 corresponding to the plurality of first connecting holes. It can be understood that when assembling the node hardware 230, the oblique connection assembly 232 and the hanging wire assembly 233 can simultaneously clamp and fix the horizontal connection plate 231, and the fasteners (not shown) can simultaneously pass through the first connection hole, the second connection hole 2323 on the oblique connection assembly 232 and the second connection hole 2323 on the hanging wire assembly 233 to achieve fixed connection between the oblique connection assembly 232, the hanging wire assembly 233 and the horizontal connection plate 231.

[0030] The horizontal connecting plate 231 is provided with a second mounting hole 2312 for mounting the second end of the support insulator 210 ; the number of the second mounting holes 2312 may be one or more and may be set as required according to actual conditions.

[0031] Furthermore, the horizontal connecting plate 231 is provided with a plurality of third connecting holes 2313 for installing a shielding ring (not shown). The shielding ring is installed on the first surface 231A or the second surface 231B, and at least one connecting bracket is protruding from the shielding ring, and the connecting bracket is connected to the first surface 231A or the second surface 231B through the third connecting hole 2313. Specifically, the shielding ring can be a semi-enclosed structure, arranged on the periphery of the horizontal connecting plate 231 and the shape matches the contour of the horizontal connecting plate 231; the shielding ring can also be a fully enclosed structure, arranged on the horizontal connecting plate 231, as long as it does not interfere with the second end of the support insulator 210. At the same time, the shielding ring can also be connected to the horizontal connecting plate 231 by welding or riveting. In summary, the present application does not limit the specific structure, specific installation position and specific installation method of the shielding ring.

[0032] In the case of a low voltage level, the node fitting 230 may not include a shielding ring, and in this case the third connection hole 2313 may be used as a drainage hole.

[0033] Combination Figure 1 and Figure 2The inclined-stayed connection assembly 232 is provided with a first mounting hole 2321 and a first construction hole 2322. The first mounting hole 2321 is used to mount the second end of the inclined-stayed insulator 220, and the first construction hole 2322 is used for construction or maintenance. The number of the first mounting hole 2321 and the first construction hole 2322 can be one or more, and can be set according to actual conditions.

[0034] The inclined connection assembly 232 includes two mutually connected inclined connection plates 2324, each inclined connection plate 2324 is L-shaped, and the two inclined connection plates 2324 are arranged on the first surface 231A in opposite directions. Specifically, the inclined connection plate 2324 is an L-shaped plate, which is composed of two mutually perpendicular plates, the horizontal plate connected to the first surface 231A, and the vertical plate connected to the other inclined connection plate 2324, the first mounting hole 2321 and the first construction hole 2322 are arranged on the vertical plate, the second connection hole 2323 is arranged on the horizontal plate, the two vertical plates are arranged to fit each other, the two horizontal plates are arranged to fit the horizontal connection plate 231, the inclined insulator 220 is fixedly connected to the first mounting hole 2321 on the vertical plate, and the horizontal plate and the horizontal connection plate 231 are directly connected by fasteners (not shown) penetrating the corresponding second connection holes 2323 and the first connection holes. Furthermore, according to actual needs, the connection strength between the vertical plates of the two inclined connecting plates 2324 can be enhanced by inserting mutually matching fasteners such as bolts and nuts into the corresponding first construction holes 2322.

[0035] Combination Figure 2 and Figure 3 The wire hanging assembly 233 is provided with a first wire hanging hole 2331 and a second construction hole 2332. The first wire hanging hole 2331 is used to hang the wire, and the second construction hole 2332 is used for construction or maintenance. The number of the first wire hanging hole 2331 and the second construction hole 2332 can be one or more, and can be set as needed according to actual conditions.

[0036] The wire hanging assembly 233 includes two mutually connected wire hanging plates 2333, the two wire hanging plates 2333 are L-shaped, and the two wire hanging plates 2333 are arranged on the second surface 231B with their backs facing each other. Specifically, the wire hanging plate 2333 is an L-shaped plate, which is composed of two mutually perpendicular plates. The plate connected to the second surface 231B is a horizontal plate, and the plate connected to the other wire hanging plate 2333 is a vertical plate. The first wire hanging hole 2331 and the second construction hole 2332 are arranged on the vertical plate, and the second connecting hole 2323 is arranged on the horizontal plate. The two vertical plates are arranged to fit each other, and the two horizontal plates are arranged to fit the horizontal connecting plate 231. The first wire hanging hole 2331 on the vertical plate is used to mount the wire hanging hardware, and the horizontal plate and the horizontal connecting plate 231 are directly connected to each other through fasteners (not shown) that penetrate the corresponding second connecting holes 2323 and the first connecting holes. Furthermore, according to actual usage requirements, the connection strength between the vertical plates of the two hanging wire boards 2333 can be enhanced by inserting mutually matching fasteners such as bolts and nuts into the corresponding second construction holes 2332.

[0037] Combination Figure 2 and Figure 3 The connection surfaces of the two inclined connecting plates 2324, the connection surfaces of the two hanging wire plates 2333 and the symmetric plane of the horizontal connecting plate 231 are located in the same plane, that is, the overall structure composed of the two inclined connecting plates 2324, the two hanging wire plates 2333 and the horizontal connecting plate 231 is a symmetrical structure. This arrangement can make the node fittings 230 more evenly stressed when connecting the post insulators 210 and the inclined insulators 220, when mounting the hanging wire fittings, and during construction and maintenance, and can effectively protect the composite crossarm 200.

[0038] See also Figure 1 The transmission tower 10 further includes a first hinge 410 and a second hinge 420. The first hinge 410 connects the first end of the post insulator 210 with the tower body 100 so that the post insulator 210 can rotate relative to the tower body 100; the second hinge 420 connects the first end of the inclined insulator 220 with the tower body 100 so that the inclined insulator 220 can rotate relative to the tower body 100.

[0039] Specifically, the first hinge 410 and the second hinge 420 are both rotatable connectors, which can enable the post insulator 210 to rotate relative to the tower body 100 and the inclined insulator 220 to rotate relative to the tower body 100 .

[0040] In one embodiment, when the number of the post insulators 210 is two and the number of the diagonal insulator 220 is one, the two post insulators 210 and the one diagonal insulator 220 form a stable triangular pyramid structure, and the two post insulators 210 and the tower body 100 also form a stable triangular structure. Under normal circumstances, although the first hinge 410 and the second hinge 420 support rotation, the composite cross arm 200 cannot rotate relative to the tower body 100 because the structure formed by the two post insulators 210, the one diagonal insulator 220 and the tower body 100 is stable.

[0041] Assuming an extreme working condition, when one of the post insulators 210 breaks, the load mutation causes the inclined insulator 220 and the remaining post insulator 210 to rotate relative to the tower body 100, thereby releasing the load through rotation and avoiding complete damage of the composite crossarm 200. Therefore, before the composite crossarm 200 is maintained, the composite crossarm 200 can continue to serve as a conductor mount to prevent a larger accident.

[0042] Furthermore, since the present design has a certain load release effect, the design specifications can be lowered during the design. Compared with the fixed connection method, the present application can adopt a smaller disconnection load design, which can reduce the manufacturing cost.

[0043] At the same time, in the prior art, the post insulator 210 is usually connected to the tower body 100 in the form of a strap (including a plug-in plate, etc.). This connection method is actually between fixed connection and hinged connection. However, when performing the corresponding compressive stability calculation, for safety reasons, it is often assumed to be a hinged boundary condition, resulting in design redundancy. However, in the design of the present application, the connection method between the post insulator 210 and the cable-stayed insulator 220 and the tower body 100 is hinged, which is consistent with the boundary condition assumption in the stability calculation formula, and can avoid design redundancy.

[0044] It should be noted that, although the above description is based on an embodiment of two post insulators 210 and one oblique-pull insulator 220 , it is also applicable to an embodiment of two post insulators and two oblique-pull insulators.

[0045] In some other embodiments, the composite cross arm and the tower body may also be connected via a fixed connector, in which case the post insulator and the cable-stayed insulator cannot rotate relative to the tower body.

[0046] See also Figure 1The tower body 100 includes a tower body 110, a first support frame 120 and a second support frame 130. The first support frame 120 and the second support frame 130 are convexly arranged on the same side wall of the tower body 110, the first support frame 120 is connected to the first end of the post insulator 210, and the second support frame 130 is connected to the first end of the inclined insulator 220.

[0047] Specifically, the first support frame 120 can be adaptively designed according to the relative position and angle between the post insulator 210 and the tower body 100 , and the second support frame 130 can be adaptively designed according to the relative position and angle between the inclined insulator 220 and the tower body 100 .

[0048] The arrangement of the first support frame 120 and the second support frame 130, on the one hand, can facilitate and efficiently maintain the composite crossarm 200 and the tower body 100; on the other hand, when a plurality of composite crossarms 200 are arranged on the tower body 100, because the spacing between the composite crossarm 200 and the tower body 100 can be adjusted by the first support frame 120 and the second support frame 130, the sizes of the plurality of composite crossarms 200 can be consistent, thereby improving production efficiency.

[0049] In some other embodiments, the first support frame and the second support frame may not be installed, and the post insulator and the diagonal insulator may be directly installed on the tower body. Alternatively, only the first support frame may be installed without installing the second support frame, in which case the post insulator is connected to the first support frame and the diagonal insulator is directly installed on the tower body, which is not limited here.

[0050] In summary, the present application provides detachable connections between the horizontal connection plate and the diagonal connection assembly, and between the horizontal connection plate and the hanging wire assembly. On the one hand, it is convenient to change and simplify the structure of the node hardware according to actual conditions, thereby reducing manufacturing and installation costs; on the other hand, the node hardware can adjust the connection angle between the crossarm and the tower body, making the installation and adjustment of the composite crossarm flexible and simple. At the same time, the diagonal connection assembly includes two interconnected diagonal connection plates, and the hanging wire assembly includes two interconnected hanging wire plates, which can facilitate the assembly of the node hardware and improve the adaptability of the node hardware to different crossarm structures. The setting of the shielding ring can also balance the voltage, thereby protecting the node hardware.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A transmission tower, characterized in that: The transmission tower comprises a tower body and a composite cross arm arranged on the tower body, wherein the composite cross arm comprises a diagonal insulator, a post insulator and a node hardware, wherein the first ends of the post insulator and the diagonal insulator are connected to the tower body, and the second ends are connected together through the node hardware, and the node hardware comprises: a horizontal connecting plate, used for connecting the second end of the post insulator, comprising a first surface and a second surface disposed opposite to each other; A diagonal connection assembly, mounted on the first surface, for connecting the second end of the diagonal insulator; A wire hanging assembly is mounted on the second surface; Wherein, the horizontal connection plate and the oblique-stayed connection assembly, and the horizontal connection plate and the wire hanging assembly are all detachably connected.

2. The transmission tower according to claim 1, characterized in that: The horizontal connecting plate is provided with a plurality of first connecting holes, and the plurality of first connecting holes penetrate the first surface and the second surface. The end surfaces where the oblique connection assembly and the hanging wire assembly are connected to the first surface and the second surface are provided with a plurality of second connecting holes corresponding to the plurality of first connecting holes.

3. The transmission tower according to claim 1, characterized in that: The oblique-stayed connection assembly is provided with a first construction hole and a first mounting hole, and the first mounting hole is used for mounting the oblique-stayed insulator.

4. The transmission tower according to claim 1, characterized in that: The oblique-stayed connection assembly includes two mutually connected oblique-stayed connection plates, each of which is L-shaped, and the two oblique-stayed connection plates are arranged on the first surface with their backs to each other.

5. The transmission tower according to claim 1, characterized in that: The horizontal connecting plate is provided with a second mounting hole for mounting the post insulator.

6. The transmission tower according to claim 1, characterized in that: The wire hanging assembly is provided with a first wire hanging hole and a second construction hole.

7. The transmission tower according to claim 1, characterized in that: The node fitting further includes a shielding ring mounted on the first surface or the second surface, at least one connecting bracket protruding from the shielding ring, and the connecting bracket is connected to the first surface or the second surface.

8. The transmission tower according to claim 4, characterized in that: The wire hanging assembly includes two mutually connected wire hanging plates, the two wire hanging plates are L-shaped, and the two wire hanging plates are arranged on the second surface with their backs facing each other.

9. The transmission tower according to claim 8, characterized in that: The connection surfaces of the two oblique-stayed connection plates, the connection surfaces of the two hanging wire plates and the symmetry plane of the horizontal connection plate are located in the same plane.

10. The transmission tower according to claim 1, characterized in that: The transmission tower further comprises: a first hinged member, connecting the first end of the post insulator and the tower body, so that the post insulator can rotate relative to the tower body; The second hinged member connects the first end of the oblique-stayed insulator and the tower body, so that the oblique-stayed insulator can rotate relative to the tower body.

Images