CN215870688U

CN215870688U - Double-loop power transmission tower

Info

Publication number: CN215870688U
Application number: CN202122084787.2U
Authority: CN
Inventors: 周军; 谭春辉; 雷霆; 郭文星; 吴廷祥; 黄进; 冯杰; 陈雄波; 杨锐棋
Original assignee: Shenzhen Power Supply Planning Design Institute Co ltd
Current assignee: Shenzhen Power Supply Planning Design Institute Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-02-18
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a double-loop power transmission tower which comprises a tower body and insulator strings, wherein the tower body comprises a tower head, a tower body and tower legs, the tower head and the tower legs are respectively connected to two ends of the tower body, the tower head comprises an inner window and three cross beams which are distributed at intervals along the vertical direction, two ends of each cross beam are connected with the inner side of the inner window so as to form three windows which are stacked along the vertical direction in the inner window, six insulator strings are arranged, two insulator strings are arranged in each window, the insulator strings are distributed in two rows along the vertical direction, and the insulator strings are connected with the cross beams. According to the utility model, the three-phase transmission lines in each loop are distributed along the vertical direction, so that the two loops are respectively arranged on two sides of the tower head, the tower-up channel can be arranged on two sides of the tower head, when one loop has maintenance requirements, the power transmission of the other loop is not influenced, the later maintenance of the power transmission tower is facilitated, the horizontal distance between the two loops is reduced, and the corridor width of the tower head is further reduced.

Description

Double-loop power transmission tower

Technical Field

The utility model relates to the technical field of transmission line towers, in particular to a double-loop transmission tower.

Background

The transmission line tower is used for making somebody a mere figurehead and carrying the transmission line of high pressure or superhigh pressure, it is the important component of electric power facility, two power supply of load can be simultaneously carried to the transmission tower of double loop, when one of them power has a power failure because of the accident, another power can continue the power supply, in the correlation technique, because the distribution in two return circuits is unreasonable, it receives the influence in two return circuits simultaneously to go up the tower passageway, overhaul when one of them trouble return circuit, must close another return circuit simultaneously, two return circuits have a power failure simultaneously when leading to overhauing, can not satisfy user's power consumption demand, cause power consumption inconvenience and power consumption loss for the user.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the double-loop power transmission tower provided by the utility model is convenient for later-stage maintenance, and the corridor width and the occupied area are reduced.

A dual-circuit transmission tower according to an embodiment of the present invention includes:

the tower body comprises a tower head, a tower body and tower legs, wherein the tower head and the tower legs are respectively connected to two ends of the tower body, the tower head comprises an inner window and three cross beams which are distributed at intervals along the vertical direction, the cross beams are positioned inside the inner window, and two ends of the cross beams are connected with the inner side of the inner window so as to form three windows which are stacked along the vertical direction in the inner window;

insulator chain for the installation transmission conductor, insulator chain is provided with six, is provided with two in the window insulator chain, insulator chain arranges into two along vertical direction, insulator chain with the crossbeam is connected.

The double-loop power transmission tower provided by the embodiment of the utility model has the following beneficial effects:

according to the double-loop power transmission tower, the three-phase power transmission lines in each loop are distributed along the vertical direction, so that the two loops are respectively arranged on two sides of the tower head, the upper tower channel can be arranged on two sides of the tower head, when one loop has maintenance requirements, a maintainer can maintain the loop from one side of the tower head corresponding to the loop, the power transmission of the other loop is not influenced, the later-stage maintenance of the power transmission tower is facilitated, and the power consumption loss of a user can be reduced; in addition, an upper tower channel between the two groups of loops can be omitted, the horizontal distance between the two groups of loops is reduced, the corridor width of the tower head is compressed, the width of the tower head is reduced, and the occupied area of the power transmission tower is reduced through the design of the narrow base.

According to some embodiments of the utility model, both ends of the insulator string are connected to the cross beam, the insulator string is dropped below the cross beam connected to the insulator string, and the insulator string is V-shaped.

According to some embodiments of the utility model, the insulator string comprises a support fitting connected with the insulator string, the support fitting having a plurality of fixing clips for connecting the transmission conductors.

According to some embodiments of the utility model, the insulator string comprises a connection fitting and a plurality of insulator elements, the connection fitting has a plurality of connection strings, and the insulator elements are connected in series to the connection strings.

According to some embodiments of the utility model, the tower head comprises a plurality of mounting brackets fixed to the bottom of the cross beam, the insulator string being connected with the mounting brackets.

According to some embodiments of the utility model, the tower head is provided with two ground brackets at the top, which are connected above the cross beam at the top.

According to some embodiments of the utility model, the cross beams extend in a horizontal direction and are parallel to each other.

According to some embodiments of the present invention, the inner window includes two fixing frames, the two fixing frames are distributed along a vertical direction and are parallel to each other, and two ends of the cross beam are respectively connected to the two fixing frames.

According to some embodiments of the utility model, the inner window further comprises two connecting frames, one end of each of the two connecting frames is connected with the two fixing frames, and the other end of each of the two connecting frames is connected with the top end of the tower body.

According to some embodiments of the utility model, the tower legs are provided in two, both of the tower legs are connected to the bottom end of the tower body, and the distance between the two tower legs is less than 10 m.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the following figures and examples, in which:

fig. 1 is a schematic structural diagram of an embodiment of a dual-circuit transmission tower of the present invention;

FIG. 2 is a schematic diagram of the construction of one embodiment of the tower head of FIG. 1;

fig. 3 is a schematic structural diagram of one embodiment of the insulator string in fig. 1.

Reference numerals:

the tower comprises a tower body 100, a tower head 110, an inner window 111, a fixing frame 1111, a connecting frame 1112, a cross beam 112, a window 113, a mounting bracket 114, a ground wire bracket 115, a tower body 120 and tower legs 130; the insulator string comprises an insulator string 200, a support hardware 210, a fixed wire clamp 211, a connecting hardware 220, a connecting string 221 and an insulator element 230.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1, an embodiment of the present invention provides a dual-circuit transmission tower that allows the erection of transmission conductors. The double-loop power transmission tower comprises a tower body 100 and an insulator string 200, wherein the insulator string 200 is fixed on the tower body 100, the insulator string 200 is used for installing and hanging power transmission leads, the insulator string 200 has insulation characteristics and isolates the power transmission leads from the tower body 100, and the tower body 100 provides a mounting position with a certain height for the insulator string 200 so as to arrange power transmission lead frames in the air and reduce occupation of the power transmission leads on land space. Specifically, the tower body 100 includes a tower head 110, a tower body 120 and tower legs 130, the tower head 110 and the tower legs 130 are respectively connected to two ends of the tower body 120, the tower legs 130 are fixed on the ground, and the tower body 120 is used for supporting the tower head 110 and erecting the tower head 110 in the air; with reference to fig. 1 and 2, the tower head 110 includes an inner window 111 and three cross beams 112, the three cross beams 112 are arranged in three, the three cross beams 112 are distributed at intervals in the vertical direction, the cross beams 112 are located inside the inner window 111, two ends of the cross beams 112 are connected with the inner side of the inner window 111, so that three windows 113 which are stacked and distributed in the vertical direction are formed inside the inner window 111, six insulator strings 200 are arranged, two insulator strings 200 are arranged in each window 113, the insulator strings 200 are connected with the cross beams 112, the insulator strings 200 are arranged in two rows in the vertical direction, each row includes three insulator strings 200, the insulator strings 200 in each row are used for connecting three-phase transmission conductors in one loop, and the transmission tower can carry double-loop power transmission.

Therefore, in the double-loop power transmission tower, the three-phase power transmission lines in each loop are distributed along the vertical direction, so that the two loops are respectively arranged on two sides of the tower head 110, the tower-up channel can be arranged on two sides of the tower head 110, when one loop has maintenance requirements, a maintainer can maintain the loop from one side of the tower head 110 corresponding to the loop, the power transmission of the other loop is not influenced, the later maintenance of the power transmission tower is facilitated, and the power consumption loss of a user can be reduced; in addition, an upper tower channel between the two groups of loops can be omitted, and the horizontal distance between the two groups of loops is reduced, so that the corridor width of the tower head 110 is reduced, the width of the tower head 110 is reduced, and the floor area of the power transmission tower is reduced through the design of a narrow base; the clear width of the power transmission tower corridor is 20.9m, and is reduced by 39% compared with a south net iron tower corridor.

In addition, the width of the tower head 110 is reduced, so that the steel consumption during the construction of the tower head 110 is reduced, and the cost is low; by arranging the three layers of cross beams 112, the tower head 110 has higher structural strength, and under the working conditions of severe weather, heavy cross-over wiring or insulator string 200 fracture and the like, the cross beams 112 can be combined to play a supporting role, so that the accident range is prevented from being enlarged; and because the occupied area of the line is reduced, when the power transmission tower is used for urban line, the removal amount can be preferentially reduced, and the feasibility of line construction is increased, so that the power transmission tower can be applied to areas with insufficient land resources, areas sharing corridors with railways, areas sharing corridors with highways, crowded areas with dense civil houses and the like.

As shown in fig. 2, both ends of the insulator string 200 are connected to the cross beam 112, and the insulator string 200 is dropped below the cross beam 112 connected to the insulator string 200, so that the insulator string 200 is in a V shape. The V-shaped insulator string 200 can limit the swinging amount of the transmission conductors, so that the windage yaw distance is reduced, the size of the tower head 110 is reduced, the line corridor is shortened, the development amount of land used by the transmission tower can be reduced, and the windage yaw of the insulator string 200 can be reduced by about 3.5 m.

The power transmission tower generally adopts an erection mode of split conductors, the split conductors can inhibit corona discharge and reduce circuit reactance, different areas have different requirements on the voltage grade of the power transmission tower, different voltage grades and different numbers of the split conductors connected with the power transmission tower, for example, a single conductor is used for each phase of the power transmission tower of 110kv, and two split conductors are used for each phase of the power transmission towers of 220kv and 330 kv.

In the embodiment of the utility model, a 550kv double-loop power transmission tower is provided, each phase of the power transmission tower uses a four-split conductor, and in order to facilitate erection of power transmission conductors, as shown in fig. 3, an insulator string 200 further includes a supporting hardware 210, the supporting hardware 210 is connected with the insulator string 200, the supporting hardware 210 has a plurality of fixing clamps 211, the fixing clamps 211 are used for connection of power transmission conductors, in this embodiment, the supporting hardware 210 is provided with four fixing clamps 211, so that erection of four power transmission conductors can be realized, and the four fixing clamps 211 are respectively located at corners of the supporting hardware 210, so that the power transmission conductors on the surface are mutually interfered and wound. The insulator string 200 is connected to the top of the support hardware 210, the fixing wire clamp 211 is arranged below the insulator string 200, and the transmission conductors and the insulator string 200 are mutually separated to prevent mutual interference.

The insulator string 200 comprises a plurality of connecting fittings 220 and a plurality of insulator elements 230, wherein the connecting fittings 220 are provided with a plurality of connecting strings 221, and the insulator elements 230 are connected in series on the connecting strings 221, so that the insulator string 200 is provided with a plurality of connecting strings 221 formed by connecting the insulator elements 230 in series. In an embodiment of the present invention, two connection fittings 220 are provided, and each connection fitting 220 is connected with one connection string 221, although a plurality of connection strings 221 may also be provided, and the provision of a plurality of connection strings 221 may further reduce the swing amplitude of the power transmission conductor.

As shown in fig. 2, the tower head 110 includes a plurality of mounting brackets 114, the mounting brackets 114 are fixed to the bottom of the cross beam 112, and the mounting brackets 114 are used for mounting the insulator string 200; the insulator string 200 can be connected with the mounting bracket 114 by means of screw fastening, welding and the like, so that the connection strength between the insulator string 200 and the mounting bracket 114 is ensured, and the mounting bracket 114 can be angle steel and is welded to the bottom of the cross beam 112. It should be noted that four mounting brackets 114 are connected to the bottom of each cross beam 112 to support the simultaneous assembly of two insulator strings 200, and the connection between the mounting brackets 114 is compact, and the insulator strings 200 are distributed in the middle of each window 113, so as to reduce the width of the tower head 110 and the width of the corridor.

In addition, as shown in fig. 2, the inner window 111 includes two fixing frames 1111, the two fixing frames 1111 are distributed along the vertical direction and are parallel to each other, and both ends of the cross beam 112 are connected to the two fixing frames 1111 respectively; because two mount 1111 are the linear type in vertical direction and extend, mount 1111 need not to become the slope in vertical direction, has reduced the equipment degree of difficulty of tower head 110, and the shaping of mount 1111 of being convenient for is favorable to the construction of transmission tower to through setting up the mount 1111 of linear type, make the appearance of tower head 110 more clean and tidy, be convenient for shorten tower head 110 transverse width.

Further, the cross beam 112 is also set to be linear type, the cross beam 112 extends along the horizontal direction, the three cross beams 112 are parallel to each other, and the cross beam 112 and the fixing frame 1111 are perpendicular to each other, so that a stable stress system is formed inside the tower head 110, the defect of stress concentration and the like caused by inclination of the component members is overcome, and the cross beam 112 extends linearly, so that the material consumption of the cross beam 112 is less compared with that of an inclined connecting member, and the cost is saved.

The inner window 111 further includes two connecting frames 1112, one ends of the two connecting frames 1112 are respectively connected to the two fixing frames 1111, the other ends of the two connecting frames 1112 are connected to the top end of the tower body 120, and the connecting frames 1112 form a transition between the tower head 110 and the tower body 120, so that the tower head 110 and the tower body 120 are connected into a whole. As shown in fig. 2, the two connecting frames 1112 and the beam 112 at the bottom layer form a triangular structure, so that the overall structure of the transmission tower is more stable.

The top of the tower head 110 is further provided with two ground wire brackets 115, the two ground wire brackets 115 are connected above the cross beam 112 located at the top, the ground wire brackets 115 are used for erecting ground wires, the ground wires are used for lightning protection and protecting the transmission conductors, and the ground wires can introduce current into the ground to avoid irreversible damage caused by lightning strike to the transmission conductors in lightning weather.

It should be noted that the cross beam 112, the fixing frame 1111, the connecting frame 1112, the tower body 120, the tower legs 130, and the like may be assembled by steel pipes, which is convenient for material selection and can ensure the structural strength of the above components.

As shown in fig. 1, two tower legs 130 are provided, two tower legs 130 are oppositely arranged, two tower legs 130 are connected to the bottom end of the tower body 120, and the distance between the two tower legs 130 is less than 10m, since the tower head 110 in the present invention adopts a narrow base, the root opening of the transmission tower can be no more than 10m, and the floor area of the transmission tower can be reduced by about 60% compared with a tower with the same height.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims

1. A dual-circuit transmission tower, comprising:

2. The dual-circuit transmission tower according to claim 1, wherein both ends of the insulator string are connected to the cross beam, the insulator string is dropped below the cross beam connected to the insulator string, and the insulator string is in a V shape.

3. The dual-circuit transmission tower of claim 2 wherein the insulator string comprises a support fitting connected to the insulator string, the support fitting having a plurality of securing clips for connecting the transmission conductor.

4. The dual-circuit transmission tower according to claim 2 wherein the insulator string comprises a link fitting having a plurality of link strings and a plurality of insulator elements connected in series to the link strings.

5. The dual-circuit transmission tower according to any one of claims 1 to 4, wherein the tower head comprises a plurality of mounting brackets fixed to the bottom of the beam, the insulator string being connected to the mounting brackets.

6. The dual circuit transmission tower according to any of claims 1 to 4 wherein the top of the tower head is provided with two ground wire brackets connected above the beam at the top.

7. The dual circuit transmission tower of claim 1, wherein the beams extend in a horizontal direction and are parallel to each other.

8. The double-circuit transmission tower according to claim 1 or 7, wherein the inner window comprises two fixing frames, the two fixing frames are distributed along a vertical direction and are parallel to each other, and two ends of the cross beam are respectively connected with the two fixing frames.

9. The dual-circuit transmission tower of claim 8, wherein the inner window further comprises two connection frames, one end of each of the two connection frames is connected to the two fixing frames, and the other end of each of the two connection frames is connected to the top end of the tower body.

10. The dual-circuit transmission tower of claim 1, wherein the tower legs are provided in two, both of the tower legs are connected to the bottom end of the tower body, and the distance between the two tower legs is less than 10 m.