CN219509339U - Power transmission tower - Google Patents

Abstract

The utility model discloses a power transmission tower, which comprises a tower body and a cross arm arranged on the tower body, wherein the tower body comprises a main body which is vertically arranged and a tower head which is horizontally arranged at the top of the main body, two ends of the tower head are respectively vertically and downwardly extended to be provided with a middle support, the cross arm comprises a composite cross arm which is arranged on the middle support, and a part of the composite cross arm which is not connected with the middle support is directly used for hanging a wire clamp. The transmission tower can directly connect the wires on the composite cross arm, shortens the length of the cross arm, reduces the occupied area of the tower foundation and reduces the cost.

Description

Power transmission tower

Technical Field

The utility model relates to the technical field of power transmission, in particular to a power transmission tower.

Background

Overhead lines are the most commonly used form of transmission line, and generally, a fixed cross arm extends from a tower body to mount a wire, and a traditional transmission tower generally adopts a long insulator string to hang the wire, so that the long insulator string windage can cause the problem of overlong traditional iron cross arms.

Disclosure of Invention

The utility model mainly aims to provide a power transmission tower, which can directly connect wires on a composite cross arm, shorten the length of the cross arm, reduce the occupied area of a tower foundation and reduce the cost.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a transmission tower, including the body of a tower and the cross arm of setting on the body of a tower, the body of a tower is including the main part of vertical setting and the tower head of level setting at the main part top, and the vertical downwardly extending in both ends of tower head respectively sets up the middle pillar, and the cross arm includes compound cross arm, and compound cross arm sets up on the middle pillar, and the part direct mounting fastener that compound cross arm was not connected with the middle pillar is used for the articulated wire.

According to some embodiments of the utility model, a composite cross arm comprises: the hardware assembly comprises hardware and a wire clamp arranged on the hardware; one end of the first insulator is connected with the hardware fitting, and the other end of the first insulator is connected with the middle support column; and one end of the second insulator is connected with the hardware fitting, the other end of the second insulator is connected with the middle support column, and the second insulator is positioned below the first insulator.

According to some embodiments of the utility model, the hardware comprises: the first support part and the second support part are positioned below the first support part; the first supporting part and the second supporting part are respectively connected with two ends of the bending part; the first insulator and the second insulator are connected with the bending part; the first supporting portion and the second supporting portion are respectively provided with a mounting hole for connecting the wire clamps.

According to some embodiments of the present utility model, the fitting assembly includes two fittings having the same structure, the two fittings being disposed parallel to each other, and two bent portions of the two fittings clamping ends of the first insulator connecting fitting and ends of the second insulator connecting fitting.

According to some embodiments of the utility model, the hardware comprises: a sleeve for connecting the second insulator; the flange is arranged at one end of the sleeve, which is far away from the second insulator; the first connecting plate is arranged on the outer wall of the sleeve and is connected with the first insulator; the second connecting plate is arranged on the outer wall of the sleeve and is provided with a through hole; the third connecting plate is arranged on the outer wall of the sleeve and is connected with the wire clamp.

According to some embodiments of the utility model, the hardware fitting comprises a wire hanging plate and a connecting plate, wherein the wire hanging plate and the connecting plate are mutually perpendicular and fixedly connected, the wire hanging plate is provided with a connecting hole and a wire hanging hole, the connecting hole is used for connecting a first insulator, the wire hanging hole is used for connecting a wire clamp, and the connecting plate is used for connecting a second insulator.

According to some embodiments of the utility model, the cross arm further comprises a suspension insulator, one end of the suspension insulator is hung on the lower end of the middle pillar, and the other end is used for hanging the wire.

According to some embodiments of the utility model, the composite cross arm is rotatably disposed on the middle post, the composite cross arm further comprising: the first hinge piece is connected with the other end of the first insulator and is used for connecting the middle support column, and the first insulator can rotate relative to the tower body; the second hinge piece is connected with the other end of the second insulator and is used for being connected with the middle support column, and the second insulator can rotate relative to the tower body.

According to some embodiments of the utility model, the axis of rotation of the first insulator is collinear with the axis of rotation of the second insulator, and the axis of rotation of the first insulator and the axis of rotation of the second insulator are both disposed vertically or are disposed obliquely with respect to the vertical.

According to some embodiments of the utility model, the first hinge and the second hinge each comprise: a base for connecting the middle struts; the rotating block is rotatably arranged on the base; wherein, the first insulator is connected to the commentaries on classics piece of first articulated elements, and the second insulator is connected to the commentaries on classics piece of second articulated elements.

The beneficial effects of the utility model are as follows: compared with the prior art, the power transmission tower can directly hang wires on the composite cross arm, shortens the length of the cross arm, reduces the occupied area of the tower foundation and reduces the cost.

Further, the transmission tower can be hung with three-phase wires by adopting two composite cross arms and one suspension insulator in a matched manner, and the distance between the phase wires is greatly reduced on the premise of meeting the electric gap, so that the tower height of the transmission tower is reduced; the triangular lead arrangement is realized, the balance of three-phase voltage is ensured, lead transposition is not needed in the power transmission process, a transposition tower is not needed, the steel consumption of the whole tower and the occupied area of the tower foundation are reduced, and the carbon emission and the construction cost in the power transmission line construction process are reduced. Meanwhile, the compact tower head arrangement is realized, the wave impedance of the power transmission line is reduced, more electric energy can be transmitted compared with the traditional iron tower, and the economic and technical effects are remarkable.

Furthermore, the power transmission tower adopts the rotatable composite cross arm to release partial unbalanced tension, reduces the stress of the cross arm, does not need to adopt a large-specification composite insulator, and can save the cost.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings required in the description of the embodiments will be briefly described below, it being obvious that the drawings described below are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a schematic view of the overall structure of a power transmission tower 10 according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of the overall structure of a power transmission tower 10 according to another embodiment of the present utility model;

FIG. 3 is an enlarged view at A in FIG. 1;

fig. 4 is a schematic structural diagram of a first fitting 131 according to the present utility model;

fig. 5 is a schematic structural view of the base 41 and the rotation block 42;

FIG. 6 is an enlarged partial schematic view of the end of the composite cross arm 100 of FIG. 2;

fig. 7 is a schematic view showing the overall structure of a power transmission tower 10 according to still another embodiment of the present utility model;

fig. 8 is an enlarged view at B in fig. 7;

fig. 9 is a schematic structural diagram of the third fitting 160.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, a power transmission tower 10 includes: the tower body 20 and the cross arm of setting on the tower body 20, the tower body 20 includes the main part 21 of vertical setting and sets up the tower head 22 at main part 21 top, and the cross arm sets up the tip of keeping away from main part 21 on the tower head 22 for the articulated wire.

In an embodiment, the main body 21 is a rod body, and may specifically be a cylinder or a cone, and the axis of the main body 21 is the axis of the tower 20. The tower head 22 is a horizontal bracket horizontally arranged at the top of the main body 21, the horizontal bracket is symmetrically arranged along the axis of the tower body 20, namely, the middle part of the horizontal bracket is fixedly connected with the main body 21, and two ends of the horizontal bracket are respectively positioned at two sides of the main body 21. The main body 21 and the tower head 22 can be steel pipe poles. Set up two cross arms on the transmission tower 10, two cross arms symmetry set up in the both ends that main part 21 were kept away from to the transverse support, and then make the atress balance when hanging the wire on the cross arm, can guarantee the atress balance of whole transmission tower 10 to optimize the overall structure of transmission tower 10, make transmission tower 10 more stable.

In another embodiment, as shown in fig. 2, the tower body 20 of the power transmission tower 10 is a lattice angle steel structure, that is, the main body 21 is a lattice tower, and the tower head 22 is a lattice tower head.

Referring to fig. 1 and 2, the cross arm includes a composite cross arm 100, the composite cross arm 100 is rotatably disposed on the tower head 22, and a portion of the composite cross arm 100 not connected to the tower head 22 is used for hooking a wire. Specifically, the two ends of the tower head 22 are respectively provided with a middle support 23 extending vertically downwards, and the composite cross arm 100 is rotatably arranged on the middle support 23. The cross arm can be influenced by factors such as wind load when actually running, so that unbalanced tension is generated on the wires, and the composite cross arm 100 is rotated towards the side with larger tension of the wires, so that parameters such as the span of the wires at two sides (horizontal distance between the wire hanging points of two adjacent power transmission towers) are changed, namely, the wire hanging ends on the composite cross arm 100 are displaced until the wires are deflected to a certain position, the tension of the wires at two sides reaches new balance, so that the unbalanced tension is released, the stress of the cross arm is reduced, a large-size composite insulator is not needed, the cost is saved, and the safety of a power transmission line is also improved.

In other embodiments, the composite cross arm may be fixedly attached to the center pillar in areas where wind loads are less likely, such as by fasteners such as bolts, or by welding, snap-fitting, etc., without limitation.

Referring to fig. 1, the middle support 23 is a steel pipe pole structure. Alternatively, referring to fig. 2, the middle support 23 may be a lattice bar. In other embodiments, the middle strut 23 may be a composite member, etc., without being limited thereto, so long as the composite cross arm 100 can be stably connected. When the middle support 23 adopts a composite material component, the length of the middle support 23 can be reasonably set, and the wires can be directly hung at the lower end part of the middle support 23 on the premise of meeting the electric gap, so that the wires do not need to be hung through hanging insulators and the like, the height of the power transmission tower 10 can be further reduced, and the cost is saved.

The composite cross arm 100 includes a first insulator 110, a second insulator 120, a fitting assembly 130, a first hinge 140, and a second hinge 150. The hardware assembly 130 is used for mounting wires. Optionally, the wires are split wires, and the number of split wires is set according to the requirement.

The first insulator 110 is disposed obliquely downward from the tower head 22, one end of the first insulator 110 is connected to the hardware assembly 130, and the first insulator 110 plays a role in suspending the hardware assembly 130. The other end of the first insulator 110 is connected to a first hinge member 140, and the first hinge member 140 is disposed at the tower head 22, specifically, at the upper end of the middle support 23, so that the first insulator 110 can rotate relative to the tower body 20.

The second insulator 120 is located under the first insulator 110. One end of the second insulator 120 is connected with the hardware assembly 130, and the second insulator 120 supports the hardware assembly 130. The other end of the second insulator 120 is connected to a second hinge member 150, and the second hinge member 150 is disposed at the tower head 22, specifically, at the lower end of the middle support 23, so that the second insulator 120 can rotate relative to the tower body 20. The first insulator 110 and the second insulator 120 form a delta structure on the tower head 22, ensuring structural stability of the composite cross arm 100.

Alternatively, the first insulator 110 and the second insulator 120 each include an insulator and an umbrella cover wrapped around the insulator, wherein the insulator is a solid rod or hollow tube made of a composite material. In one embodiment, the first insulator 110 is a line composite insulator and the second insulator 120 is a post composite insulator.

The composite cross arm 100 of the present embodiment mounts wires through the hardware assembly 130, the first insulator 110 and the second insulator 120 are rotatable relative to the tower body 20, and when the unbalanced tension of the wires is received, the composite cross arm 100 can release the unbalanced tension through rotation, so as to avoid damage to the composite cross arm 100 and the tower body 20.

In other embodiments, the composite cross arm may also include only one post composite insulator, where one end of the post composite insulator is fixedly connected with the middle post, and the other end is directly used for hooking the wire, so as to meet the actual requirement.

The hardware assembly 130 comprises hardware and a wire clamp 132, wires are directly hung on the hardware by the wire clamp 132, the influence of wind deflection on the length of the composite cross arm 100 is not required to be considered, the length of the composite cross arm 100 can be further shortened, and the tower head arrangement of the power transmission tower 10 is more compact than that of a conventional composite cross arm tower.

Referring to fig. 1, in some embodiments, the hardware assembly 130 includes a first hardware 131 and a wire clip 132. The end of the first insulator 110 and the end of the second insulator 120 are both connected to the first fitting 131. The wire clamp 132 is mounted on the first fitting 131, and the wire clamp 132 is used for fixing a wire. The number of clamps 132 is set according to the number of wire splits required.

The wire clamp 132 is directly mounted through the first hardware fitting 131, so that the composite cross arm 100 is simpler and more convenient to assemble, a mounting string is completely omitted, the calling height is reduced, the corridor width is reduced, the wire hanging is more compact, and the overall economy of the power transmission line is further improved.

Referring to fig. 3 and 4, the first fitting 131 is a plate member, generally C-shaped, including a first supporting portion 1311, a second supporting portion 1312, and a bending portion 1313. The second support portion 1312 is located below the first support portion 1311, and the first support portion 1311 and the second support portion 1312 are connected to both ends of the bending portion 1313, respectively.

The first fitting 131 connects the end of the first insulator 110 and the end of the second insulator 120 by a fastener, for example, by a fastener such as a screw, and the end of the first insulator 110 and the end of the second insulator 120 are connected to the bent portion 1313 of the first fitting 131.

Optionally, a first insulator connection hole 1314 is provided at the bending portion 1313, an end portion of the first insulator 110 is connected with an adjusting fitting such as a hanging ring, and the first insulator connection hole 1314 and the hanging ring are sequentially penetrated by a fastening member such as a bolt, so as to fasten and connect the first fitting 131 with the first insulator 110. The selection and the number of the adjusting hardware tools can be adjusted according to the design and installation requirements of the composite cross arm 100.

The end of the second insulator 120 is provided with a connection plate 121. Optionally, a metal piece is disposed at an end of the insulator of the second insulator 120, a connection plate 121 is disposed on an end surface of the metal piece away from the insulator, and the connection plate 121 is provided with a connection hole. The connection plate 121 is connected to the bending portion 1313, and a second insulator connection hole 1315 is provided in the bending portion 1313, and the second insulator connection hole 1315 and the connection hole of the connection plate 121 are sequentially inserted through fasteners such as bolts to fasten the first metal fitting 131 to the second insulator 120.

The first support portion 1311 and the second support portion 1312 are each provided with a mounting hole 133 for connecting the wire clip 132. In an embodiment, three mounting holes 133 are provided and connected to three wire clamps 132 for hooking three split wires, wherein two mounting holes 133 are provided on the first support portion 1311 and one mounting hole 133 is provided on the second support portion 1312. In other embodiments, the mounting holes 133 may be provided in one, two or more, with the number of clips 132 correspondingly provided according to the number of wire splits required.

In other embodiments, the fitting assembly 130 may include two first fittings 131 having the same structure, the two first fittings 131 being disposed parallel to each other, and connecting the end of the first insulator 110 and the end of the second insulator 120 through fasteners. For example, the two first hardware fittings 131 are connected by fasteners such as screws, and the end portions of the first insulator 110 and the end portions of the second insulator 120 are located between the bending portions 1313 of the two first hardware fittings 131, the two bending portions 1313 can clamp the end portions of the first insulator 110, which are connected with the first hardware fittings 131, and the end portions of the second insulator 120, which are connected with the first hardware fittings 131, so that the connection between the hardware fitting assembly 130 and the first insulator 110 and the connection between the hardware fitting assembly 130 and the second insulator 120 are more stable, the bending strength of the hardware fitting assembly 130 can be improved, and the bearing capacity of the composite cross arm 100 can be improved.

In some embodiments, the composite cross arm 100 further includes at least one first pressure equalizing device in a closed loop or non-closed arc configuration, which may be configured as desired. The first voltage equalizing device is disposed on the hardware assembly 130. The first voltage equalizing device plays a role of an even electric field, and improves the safety of the composite cross arm 100. Alternatively, the first pressure equalizing device is an existing pressure equalizing device. The first fitting 131 is provided with a first pressure equalizing device mounting hole, and the first pressure equalizing device is fastened and connected with the first fitting 131 by penetrating through the first pressure equalizing device mounting hole through a fastener such as a screw.

In some embodiments, the axis of rotation of the first insulator 110 is collinear with the axis of rotation of the second insulator 120. The rotation axis of the first insulator 110 and the rotation axis of the second insulator 120 are both located in a vertical plane. The first insulator 110 and the second insulator 120 rotate around the rotation axis, when the wires at two sides of the composite cross arm 100 have longitudinal unbalanced tension, the first insulator 110 and the second insulator 120 can deflect, parameters such as the span of the wires at two sides are changed, and further when the wires deflect to a proper position, the tension of the wires at two sides reaches new balance, and the release of the longitudinal unbalanced tension is completed.

In other embodiments, the rotational axis of the first insulator 110 and the rotational axis of the second insulator 120 are disposed obliquely to the vertical. For example, a connection member having a connection surface inclined downward is provided on the intermediate support 23, the first insulator 110 is rotatably connected to the connection surface by the first hinge member 140 so that the rotation axis thereof is inclined with respect to the vertical direction, and the rotation axis of the second insulator 120 is coaxially provided with the rotation axis of the first insulator 110. Since the rotational locus of the link end of the composite cross arm 100 is a circular arc locus having a perpendicular distance of the link end to the rotation axis as a radius in a rotation plane perpendicular to the rotation axis. For a rotation axis which is vertically arranged, the hanging wire end of the rotation axis rotates in a horizontal rotation plane and cannot move upwards in the vertical direction; when the rotation axis is inclined with respect to the vertical direction, the rotation plane perpendicular thereto is inclined upward with respect to the horizontal direction, so that the wire hanging end tends to move upward when the first insulator 110 and the second insulator 120 are rotated about the inclined rotation axis. When the first insulator 110 and the second insulator 120 do not rotate, the hanging wire end is in a static rotation state and is positioned at the lowest point; when the first insulator 110 and the second insulator 120 are rotated with respect to the tower body 20, the hanging wire end moves upward. The hanging wire end of the composite cross arm 100 bears the weight of the hanging wire and the composite cross arm 100, so that the upward movement trend of the hanging wire end can be restrained, the composite cross arm 100 is restrained from continuing to rotate, the effect of avoiding insufficient electric gap between the wire and the tower body due to overlarge rotating angle of the composite cross arm 100 is achieved, and the composite cross arm 100 reaches an equilibrium state until the first insulator 110 and the second insulator 120 are not rotated any more. The rotation axis which is obliquely arranged is inclined by 10-30 degrees relative to the vertical direction.

In some embodiments, the axis of the second insulator 120 is disposed obliquely upward relative to the horizontal. Under the condition of the same load, the second insulator 120 which is arranged in an inclined manner bears less stress relative to the second insulator 120 which is arranged in a horizontal manner. When bearing the same load, the second insulator 120 arranged obliquely can be an insulator with smaller specification, so that the safety is ensured and the economical efficiency is improved. Alternatively, the axis of the second insulator 120 is inclined upward from the horizontal by 1 ° to 30 °. The first support portion 1311 and the second support portion 1312 of the first fitting 131 are also disposed obliquely upward in correspondence with the axial direction of the second insulator 120.

In some embodiments, the axis of the second insulator 120 is disposed in a horizontal direction, facilitating installation and wire-laying of the hardware assembly 130. Specifically, the first support portion 1311 and the second support portion 1312 of the first fitting 131 are horizontally arranged, when the second insulator 120 which is horizontally arranged is connected with the first fitting 131, the installation angle of the first fitting 131 is not required to be considered in design, the fitting assembly 130 is directly and horizontally installed for wire hanging, and the design and the installation operation are simple and convenient.

Referring to fig. 1 and 5, each of the first hinge member 140 and the second hinge member 150 includes: a base 41 and a swivel block 42. The base 41 is U-shaped as a whole, and the base 41 is fastened to the intermediate strut 23 by a fastener such as a screw. The rotation block 42 is rotatably provided on the base 41, for example, the rotation block 42 is connected to the base 41 through a rotation shaft. The rotation block 42 of the first hinge 140 is connected to the first insulator 110, and the rotation block 42 of the second hinge 150 is connected to the second insulator 120 such that the first insulator 110 and the second insulator 120 are rotatable with respect to the tower 20.

Optionally, a length adjustment member is provided between the first insulator 110 and the swivel block of the first hinge 140 to facilitate installation of the composite cross arm 100. The length adjusting piece can be an existing adjusting hardware fitting.

In some embodiments, the base 41 includes a first base 411 and a second base 412, the first base 411 and the second base 412 are all L-shaped, the first base 411 and the second base 412 are respectively connected to the middle support 23, and the first base 411 and the second base 412 are oppositely arranged to form a rotation space. The rotation block 42 is located in the rotation space. One end of the rotating shaft of the rotating block 42 is connected with the first base 411, and the other end is connected with the second base 412. When the axis of the rotating shaft is vertically arranged, the rotating axis of the first insulator 110 and the rotating axis of the second insulator 120 are both located in a vertical plane. When the axis of the rotating shaft is inclined relative to the vertical direction, the rotation axis of the first insulator 110 and the rotation axis of the second insulator 120 are inclined relative to the vertical direction.

In other embodiments, referring to fig. 2 and 6, the fitting assembly 130 includes a second fitting 134, a wire clip 132, and the second fitting 134 is connected to both the end of the first insulator 110 and the end of the second insulator 120. Optionally, the end of the first insulator 110 is connected to the second fitting 134 by a fastener. The second fitting 134 includes a sleeve 1341, a flange 1342, a first connection plate 1343, a second connection plate 1344, and a third connection plate 1345. The sleeve 1341 is connected to one end of the second insulator 120, a through hole is formed in the sleeve 1341, and a flange 1342 closes an opening of the sleeve 1341 at an end far away from the second insulator 120. The first, second and third connection plates 1343, 1344, 1345 are provided on the outer wall of the sleeve 1341.

A first connection plate 1343 is provided on the top end of the sleeve 1341, and the first connection plate 1343 is used to connect the first insulator 110. For example, a first insulator connection hole is formed in the first connection plate 1343, an adjusting fitting such as a hanging plate is connected to an end portion of the first insulator 110, a connection hole is formed in the hanging plate, and the first insulator connection hole of the first connection plate 1343 and the connection hole of the hanging plate are simultaneously penetrated by a fastening member such as a bolt, so that the first connection plate 1343 is fixedly connected with the hanging plate to fixedly connect the second fitting 134 with the first insulator 110. The selection and the number of the adjusting hardware tools can be adjusted according to the design and installation requirements of the composite cross arm 100.

The number of the second connection plates 1344 is two, and the second connection plates are respectively located at two sides of the sleeve 1341. The second connection board 1344 is provided with a through hole, which can be used for connecting a second voltage equalizing device, and the second voltage equalizing device plays a role in homogenizing an electric field. The through hole on the second connecting plate 1344 can also be used as a temporary stay hole, when the composite cross arm 100 is installed, the first insulator 110 and the second insulator 120 may rotate unnecessarily, and the temporary stay hole can temporarily fix the composite cross arm 100, so that the composite cross arm 100 is installed on the tower body 20, and the operation efficiency is improved.

The third connecting plate 1345 is disposed at the bottom of the sleeve 1341, and a mounting hole is disposed on the third connecting plate 1345 for connecting the wire clamp 132, and only a single wire is hung at this time.

In still other embodiments, referring to fig. 7 to 9, the fitting assembly 130 includes a third fitting 160 and a wire clip 132, where at least one wire hanging hole 161 is provided on the third fitting 160, and the wire clip 132 is connected to the wire hanging hole 161 for hanging a wire.

The third fitting 160 includes a wire hanging plate 162 and a connecting plate 163, and the wire hanging plate 162 and the connecting plate 163 are perpendicular to each other and fixedly connected. Specifically, the wire hanging plate 162 is a shaped plate, and a connection hole 164 is formed at an end of the upper edge of the wire hanging plate far away from the connection plate 163 for connecting the first insulator 110; three wire hanging holes 161 are arranged at intervals on the lower edge of the wire hanging plate 162, wherein two wire hanging holes 161 are positioned at two ends of the lower edge of the wire hanging plate 162, and the other wire hanging hole 161 is positioned in the middle of the lower edge of the wire hanging plate 162 so as to hang split conductors. In this embodiment, the number of the wire hanging holes 161 is three, and the wire hanging holes can be used for hanging single wires, double split wires and three split wires, so that the application range is wider and the economical efficiency is higher. In other embodiments, the wire hanging hole may be provided with one, two or more wire hanging holes, which are respectively used for hanging single wires, double split wires or other multi-split wires, and the specific position of the wire hanging hole may be set to other positions, so long as the wires do not affect each other, and the specific position is not limited herein.

The third fitting 160 is connected to at least one wire clamp 132, and a wire is hung on the wire clamp 132. Specifically, the wire clamp 132 is connected to the wire hanging hole 161, and when the wire clamp 132 is one, the wire clamp 132 can be hung on any one of the wire hanging holes 161 for hanging a single wire; when the number of the wire clamps 132 is two, the two wire clamps 132 can be respectively hung on any two wire hanging holes 161 for hanging the double split wires, and preferably the two wire clamps 132 are respectively hung on the left wire hanging hole 161 and the right wire hanging hole 161; when the number of the wire clamps 132 is three, the three wire hanging holes 161 can be arranged on the third hardware 160 in an inverted triangle structure, and the three wire clamps 132 are respectively hung on the three wire hanging holes 161 and are used for hanging three split wires; in other embodiments, a combination structure of a T-shaped board and a U-shaped hanging ring may be adopted, one end of the U-shaped hanging ring is connected to the third fitting 160, the other end of the U-shaped hanging ring is connected to the T-shaped board, and two side ends and the bottom end of the T-shaped board are used for connecting the wire clamps 132 for hanging the three split wires. The wires are directly hung on the third hardware fitting 160 by the wire clamps 132, the influence of wind deflection on the length of the composite cross arm 100 is not required to be considered, the vertical distance of the composite cross arm 100 can be further shortened, and the tower head arrangement of the power transmission tower 10 is more compact than that of a conventional composite cross arm tower.

It should be noted that, the upper edge, the lower edge, and the horizontal height refer to the relative positions of the third fitting 160 when the third fitting 160 is mounted on the composite cross arm 100, that is, when the third fitting 160 is mounted on the composite cross arm 100, the connection hole 164 is located above, the hanging wire hole 161 is located below, the edge of the third fitting 160 away from the ground is the upper edge, the edge of the third fitting 160 close to the ground is the lower edge, and the vertical distance of the horizontal plane of the target object from the ground is the horizontal height.

Wherein, the connecting plate 163 is a circular plate, and is vertically and fixedly connected to one end of the wire hanging plate 162 away from the connecting hole 164, and the connection position of the wire hanging plate 162 and the connecting plate 163 is located on the central line of the connecting plate 163, so that the third hardware 160 is uniformly stressed after being mounted on the composite cross arm 100, and unbalanced load is avoided. The connection plate 163 is provided with a plurality of mounting holes circumferentially distributed around the center of the connection plate 163 for connecting the second insulator 120. Further, two first reinforcing ribs are symmetrically arranged between the wire hanging plate 162 and the connecting plate 163, the two first reinforcing ribs are right-angle triangular plates and are respectively positioned at two sides of the wire hanging plate 162, namely, short sides of the two first reinforcing ribs are symmetrically abutted on a central line of the connecting plate 163, long sides of the two first reinforcing ribs are respectively abutted on two side surfaces of the wire hanging plate 162, and the two first reinforcing ribs are respectively perpendicular to the wire hanging plate 162 and the connecting plate 163. The arrangement of the first reinforcing ribs may improve the connection strength between the wire hanging plate 162 and the connection plate 163, thereby integrally improving the mechanical strength of the third fitting 160.

In some embodiments, referring to fig. 1, 2 and 7, the cross arm includes two composite cross arms 100, the two composite cross arms 100 are rotatably disposed on two sides of the middle support 23 along a direction perpendicular to the extending direction of the wires, and ends of the two composite cross arms 100 not connected to the middle support 23 may be used to hang two-phase wires. The cross arm further comprises a suspension insulator 30, one end of the suspension insulator 30 is hung on the lower end portion of the middle support 23, and the other end of the suspension insulator 30, which is not connected with the middle support 23, is used for hanging a phase conductor. The overhang insulator 30 may be a line composite insulator.

Referring to fig. 1, in some embodiments, the other end of the overhang insulator 30 not connected to the middle post 23 is connected to a mounting plate 31. The mounting plate 31 is provided with a wire clamp 132 for hanging a phase conductor. The number of clips 132 and the shape of the mounting plate 31 are set correspondingly according to the number of split wires. Optionally, the mounting plate 31 is a T-shaped plate, the top end of the mounting plate 31 is connected with the suspension insulator 30, and two side ends and the bottom end of the mounting plate 31 are used for connecting the wire clamps 132, which can be used for hanging three split wires.

Referring to fig. 2, in some embodiments, the other end of the suspension insulator 30 not connected to the center post 23 is directly connected to a wire clamp 132 for hooking a phase conductor.

Referring to fig. 7, in some embodiments, the other end of the suspension insulator 30, which is not connected to the middle post 23, is connected to the mounting string 33, and the mounting string 33 includes a plurality of hanging rings connected to each other, the upper end is connected to the suspension insulator 30, the lower end is connected to the hanging wire plate 34, and the lower end of the hanging wire plate 34 is provided with a connecting hole connecting wire clip 132 for hanging a phase conductor. The number of connection holes and the number of clips 132 are correspondingly set according to the number of split wires. Optionally, two connection holes are provided at the lower end of the wire hanging plate 34 for hanging the double split wires.

By hanging wires at the ends of the two composite cross arms 100 and one suspension insulator 30 far away from the middle support 23, one cross arm can be used for hanging three-phase wires, so that the wire arrangement is very compact, the distance between the phase wires is greatly reduced on the premise of meeting the electric gap, the overall height and the line wave impedance of the power transmission tower 10 are reduced, and the transmission capacity of the power transmission line is increased; meanwhile, the wires can be connected to the ends of the composite cross arm 100 and the suspension insulator 30 through the wire clamps 132, so that the problem that the traditional cross arm is too long due to wind deflection of the traditional long insulator string is solved; the triangular lead arrangement ensures the balance of three-phase voltage, and no lead transposition is needed in the power transmission process.

The power transmission tower 10 reduces the consumption of steel materials and the occupied area of the tower foundation, reduces the carbon emission and the construction cost in the construction process of the power transmission line, reduces the wave impedance of the power transmission line due to the realization of compact tower head arrangement, and can transmit more electric energy compared with the traditional iron tower, thereby having remarkable economic and technical effects.

In other embodiments, power tower 10 may have a number of cross arms that are set according to the needs of the hitching wire. For example, referring to fig. 1, two cross arms are provided on power transmission tower 10, each cross arm including two composite cross arms 100 and one overhang insulator 30, each cross arm being configured to hang on a three-phase conductor, power transmission tower 10 may be configured to hang on a double-loop conductor. When the three-loop wire needs to be hung, three cross arms are arranged on the power transmission tower. When the multi-loop wires are needed to be hung, the power transmission tower is provided with a corresponding number of cross arms.

In other embodiments, the cross arm may be used to hang a corresponding number of wires by selecting a composite cross arm 100, overhang insulator 30. For example, where only one phase conductor needs to be hooked on a single cross arm, the composite cross arm 100 may be provided only on the side of the intermediate leg 23 adjacent the main body 21, or only the overhang insulator 30 may be provided. When a single cross arm is required to only hang two phase conductors, two composite cross arms 110 may be provided, or one composite cross arm 110 and overhang insulator 30 may be provided. Thus, when the transmission tower 10 only needs to be connected with a single-loop wire, a cross arm can be arranged at one end of the tower head 22 to be connected with a three-phase wire in a hanging manner; two cross arms may be provided at both ends of the tower head 22, one of the cross arms being connected to one phase conductor and the other cross arm being connected to two phase conductors.

The foregoing description is only of embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the present utility model.

Claims (10)

1. The utility model provides a transmission tower, includes the body of a tower and sets up the cross arm on the body of a tower, the body of a tower is in including the main part and the level setting of vertical setting are in the tower head at main part top, its characterized in that, the vertical downwardly extending in both ends of tower head sets up the middle pillar respectively, the cross arm includes compound cross arm, compound cross arm set up in on the middle pillar, compound cross arm not with the direct string of clamp of part that middle pillar is connected is used for the link wire.

2. The transmission tower of claim 1, wherein the composite cross arm comprises:

the hardware assembly comprises hardware and the wire clamp arranged on the hardware;

one end of the first insulator is connected with the hardware fitting, and the other end of the first insulator is connected with the middle support column;

and one end of the second insulator is connected with the hardware fitting, the other end of the second insulator is connected with the middle support column, and the second insulator is positioned below the first insulator.

3. The power transmission tower of claim 2, wherein the hardware comprises:

a first support portion and a second support portion, the second support portion being located below the first support portion;

the first supporting part and the second supporting part are respectively connected with two ends of the bending part;

the first insulator and the second insulator are connected with the bending part;

the first supporting portion and the second supporting portion are respectively provided with a mounting hole for connecting the wire clamp.

4. A power transmission tower according to claim 3, wherein the fitting assembly comprises two structurally identical fittings, the two fittings being arranged parallel to each other, the two bent portions of the two fittings clamping the ends of the first and second insulators connecting the fittings.

5. The power transmission tower of claim 2, wherein the hardware comprises:

a sleeve for connecting the second insulator;

the flange is arranged at one end of the sleeve, which is far away from the second insulator;

the first connecting plate is arranged on the outer wall of the sleeve and is connected with the first insulator;

the second connecting plate is arranged on the outer wall of the sleeve, and is provided with a through hole;

the third connecting plate is arranged on the outer wall of the sleeve and is connected with the wire clamp.

6. The power transmission tower according to claim 2, wherein the hardware fitting comprises a wire hanging plate and a connecting plate, the wire hanging plate and the connecting plate are mutually perpendicular and fixedly connected, the wire hanging plate is provided with a connecting hole and a wire hanging hole, the connecting hole is used for connecting the first insulator, the wire hanging hole is connected with the wire clamp, and the connecting plate is used for connecting the second insulator.

7. The transmission tower of claim 2, wherein the cross arm further comprises a suspension insulator having one end thereof hooked to a lower end of the intermediate leg and the other end thereof for hooking a wire.

8. The transmission tower of claim 2, wherein the composite cross arm is rotatably disposed on the intermediate strut, the composite cross arm further comprising:

the first hinge piece is connected with the other end of the first insulator and is used for connecting the middle support column, and the first insulator can rotate relative to the tower body;

the second hinge piece is connected with the other end of the second insulator and is used for being connected with the middle support column, and the second insulator can rotate relative to the tower body.

9. The power transmission tower of claim 8, wherein the axis of rotation of the first insulator is collinear with the axis of rotation of the second insulator, and wherein the axis of rotation of the first insulator and the axis of rotation of the second insulator are both vertically disposed or are each disposed diagonally with respect to the vertical direction.

10. The power transmission tower of claim 8, wherein the first hinge and the second hinge each comprise:

a base for connecting the intermediate struts;

the rotating block is rotatably arranged on the base;

wherein the rotating block of the first hinge is connected with the first insulator, and the rotating block of the second hinge is connected with the second insulator.