CN219980390U - Suspended transposition device for power transmission line - Google Patents

Abstract

The utility model discloses a transmission line suspension transposition device which comprises an iron tower, a first tension insulator string, a second tension insulator string, a third tension insulator string, a first jumper, a second jumper, a third jumper, a fourth jumper and a fifth jumper, wherein a small-size side A phase, a large-size side A phase, a small-size side B phase and a large-size side C phase are connected to the iron tower through the first tension insulator string, the large-size side B phase and the small-size side C phase are connected to the iron tower through the second tension insulator string and the third tension insulator string respectively, two ends of the first jumper are connected to the small-size side A phase and the large-size side A phase respectively, two ends of the second jumper are connected to the small-size side B phase and the third tension insulator string respectively, two ends of the third jumper are connected to the large-size side B phase and the third tension insulator string respectively, and two ends of the fourth jumper are connected to the small-size side C phase and the second tension insulator string respectively, and two ends of the fifth jumper are connected to the large-size side C phase and the second tension insulator string respectively.

Description

Suspended transposition device for power transmission line

Technical Field

The utility model relates to the technical field of high-voltage transmission, in particular to a suspension transposition device for a transmission line.

Background

The transposition of the power transmission line is to change the positions of the three-phase wires on the pole tower in turn so as to reduce the asymmetry of current and voltage when the power system is in normal operation, enable the power equipment to be in normal operation and limit the influence of the power transmission line on the communication line.

In the related art, the following transposition methods are commonly used for single-circuit overhead transmission lines: 1. the method is to continuously adopt a special linear transposition tower with 2-base triangle arrangement to change the arrangement mode of the line wires. 2. The method uses a special strain tower to replace Zhang Dalai. 3. The method is completed by connecting each phase of wires in series with one group of insulator strings, and directly performing cross-jumping through two short jumpers and one long jumper. 4. The double-loop transposition is realized in two ways, one is to divide two loops into two single loops by using the strain tower, the transposition is realized in the single loop strain mode, and the other is to adopt the transposition of the double-loop strain tower. 5. The single column combined tension tower transposition is realized by adopting a single column transposition mode to carry out transposition of a 1000kV alternating current extra-high voltage same-tower double-circuit line.

In the various transposition methods, the transposition of the linear tower is realized by specially designing a tower form with two triangular matrixes, so that the workload of the structural design of the iron tower is increased, and the method is only suitable for ice areas with ice thickness not exceeding 10mm (including areas with ice thickness equal to 10 mm); the transposition of the tension tower is realized by specially designing a transposition tower, even by assisting in realizing the transposition tower by using two bases as shown in (c) in fig. 1.3, the workload of the structural design of the iron tower is increased, and the engineering cost is increased; the double-loop transposition and the single-column combined transposition are suitable for the same-tower double-loop circuit, and the transposition tower is required to be designed independently.

Disclosure of Invention

The present utility model has been made based on the findings and knowledge of the inventors regarding the following facts and problems:

in the related art, a 110 kilovolt line suspension transposition device is disclosed in CN202423990U (2011-12-13), which is characterized in that a first composite insulator jumper insulator string is arranged on an inner angle side lead of a corner tower, and a heavy hammer seat jumper insulator string without an insulator is arranged on an outer angle side. The device is convenient to ascend and maintain as the transposition position is close to the tower; and the wiring is simple, the economical efficiency is good, the use reliability is strong, and the cable can withstand severe weather conditions such as ice and snow, heavy rain, strong wind and the like and always maintain the safety state of the cable.

CN208039984U (2018-01-17) 110kV single-loop straight line transposition tower comprises from top to bottom: the first cross arm, the second cross arm, the third cross arm and the fourth cross arm; the first cross arm is arranged at the top end of the 110kV single-loop linear transposition tower; the second cross arm and the fourth cross arm are arranged on the same side of the 110kV single-loop linear transposition tower, and a phase of lead can be arranged; the third cross arm is arranged on the other side of the 110kV single-loop linear transposition tower, and a phase of lead can be arranged. The utility model uses the straight line double loop pole tower of the general type to change the position, which does not increase the corridor width and can ensure the safe and reliable operation of the line. The straight line transposition tower can avoid the problems of large consumption of Zhang Huanwei-resistant tower materials, more insulator strings and the like, can effectively play the advantages of the straight line tower under the condition of ensuring the distance between lines, plays the role of transposition and ensures the safety of a circuit.

CN201498997U (2009-06-30) three-phase ac transmission line transposition system discloses a single-loop three-phase ac transmission line transposition system comprising one transposition tower for supporting the single-loop three-phase ac transmission line and at least one bypass system for winding any one phase of the single-loop three-phase ac transmission line, wherein the bypass system comprises at least one bypass tower. According to the embodiment of the utility model, the bypass system is used for drainage and winding, so that the space between the lead and the iron tower is increased, the requirement of a large electric gap of extra-high voltage is met, and meanwhile, the transposition system provided by the utility model is also suitable for other voltage levels.

CN105703304B (2016-04-26) discloses a 500kV transmission line adjacent phase conductor phase-change structure, which comprises a tower body (1), wherein a pair of ground wire brackets (3) are arranged on the tower body (1), a T-shaped insulator string (2) is arranged on a phase hanging point in the tower body (1), the pair of ground wire brackets (3) are symmetrically arranged on two sides by taking the tower body (1) as a central line, jumper wire insulator strings (4) are hung on the ground wire brackets (3), and jumper wires (5) are hung on the jumper wire insulator strings (4); the device overcomes the defect that in the prior art, when only two phases are not corresponding in phase sequence, all three phases are needed to be replaced, and has the advantages of simple structure, low cost, convenience in construction and reliability in operation.

However, a suspension transposition structure specially aiming at a 220 KV single-circuit overhead transmission line double-split conductor does not exist yet, and a similar transposition mode is shown as a 110KV line suspension transposition device in CN202423990U (2011-12-13), and is only suitable for a single-conductor line, so that phase inversion between a side phase and a side phase in three phases of the transmission line is realized; for example, "CN208039984U (2018-01-17) 110kV single-loop linear transposition tower" adopts a two-base linear tower to realize transposition among three-phase conductors, a special linear tower is required to be designed separately to realize transposition, and the transposition is only suitable for ice areas with ice thickness not exceeding 10mm (including areas with ice thickness equal to 10 mm) because of conductor crossing among the shelves; for example, a 'CN 201498997U (2009-06-30) three-phase alternating current transmission line transposition system' adopts a Zhang Huanwei-resistant tower and a transposition sub-tower auxiliary mode to realize transposition, and the transposition is realized by independently designing the transposition tower, so that the design workload and the engineering cost are increased; for example, "CN105703304B (2016-04-26) is a 500kV transmission line adjacent phase conductor phase-change structure", a group of jumper wire brackets are added on a common tension tower ground wire cross arm, and transformation and checking calculation are needed for an iron tower.

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the utility model provides the power transmission line suspension transposition device which can be realized on a conventional tension tower without specially designing, modifying or checking an iron tower, saves design time and cost, improves the drawing efficiency, and has the advantages of simple structure, convenient construction, reliable operation and low manufacturing cost compared with a conventional transposition mode.

The power transmission line suspension transposition device comprises an iron tower, a first strain insulator string, a second strain insulator string, a third strain insulator string, a first jumper wire, a second jumper wire, a third jumper wire, a fourth jumper wire and a fifth jumper wire.

The first strain insulator strings are at least four, a small-size side A phase, a large-size side A phase, a small-size side B phase and a large-size side C phase of the power transmission line are respectively in one-to-one correspondence with the four first strain insulator strings and are connected with the iron tower through the corresponding first strain insulator strings, wherein the small-size side B phase and the large-size side C phase of the power transmission line are medium phases, the large-size side B phase of the power transmission line is connected with the iron tower through the second strain insulator string, the small-size side C phase of the power transmission line is connected with the iron tower through the third strain insulator string, two ends of the first jumper wire are respectively connected with the small-size side A phase and the large-size side A phase, the method comprises the steps that a small-size side A phase and a large-size side A phase are communicated through a first jumper, two ends of a second jumper are respectively connected with a small-size side B phase and a third strain insulator string, two ends of the third jumper are respectively connected with the large-size side B phase and the third strain insulator string, the small-size side B phase and the large-size side B phase are communicated through the second jumper and the third jumper, two ends of the fourth jumper are respectively connected with a small-size side C phase and the second strain insulator string, two ends of a fifth jumper are respectively connected with the large-size side C phase and the second strain insulator string, and the small-size side C phase and the large-size side C phase are communicated through the fourth jumper and the fifth jumper.

The suspended transposition device for the power transmission line can be realized on a conventional tension tower without special design transformation or checking calculation, so that the design time and cost are saved, the drawing efficiency is improved, and the suspended transposition structure has the advantages of simple structure, convenient construction, reliable operation and low manufacturing cost compared with a conventional transposition mode.

In some embodiments, the power transmission line suspension transposition device further comprises a duplex hardware string, a second jumper insulator string and a third jumper insulator string, wherein the duplex hardware string comprises two first jumper insulator strings, the two first jumper insulator strings are connected to the iron tower and are located above the small-size side C phase and the large-size side B phase, the third jumper is connected to the lower ends of the two first jumper insulator strings respectively, the second jumper insulator string is connected to the iron tower and is located below the large-size side B phase, the fourth jumper is connected to the second jumper insulator string, the third jumper is connected to the third strain insulator string and is located below the third strain insulator string, and the fourth jumper is connected to the third strain insulator string.

In some embodiments, the first jumper insulator string, the second jumper insulator string, and the third jumper insulator string each include a first connection fitting, a first composite insulator, a second connection fitting, and a sling hammer connected in sequence, the first composite insulator being connected to the iron tower or the third tension insulator string through the first connection fitting.

In some embodiments, the duplex hardware string further comprises a steel pipe, anchor clamps, end sealing covers, jumper wire supporting frames and rubber pads, the steel pipe is connected to the two first jumper wire insulator strings through the anchor clamps, the end sealing covers are two, the two end sealing covers are connected to the two ends of the steel pipe respectively to seal the two ends of the steel pipe, the jumper wire supporting frames are connected to the two first jumper wire insulator strings, the fifth jumper wire is connected to the jumper wire supporting frames through the steel pipe, and the rubber pads are connected to the jumper wire supporting frames.

The second jumper insulator string and the third jumper insulator string also comprise suspension clamps and aluminum wrapping bands, the second connecting fitting, the suspension clamps and the suspended weight hammer are sequentially connected, the suspension clamps are used for fixing wires on the second jumper insulator string or the third jumper insulator string, and the aluminum wrapping bands are wound on the wires.

In some embodiments, the first connection fitting includes a first hanging plate and a first ball-head hanging ring, and the first hanging plate, the first ball-head hanging ring and the first composite insulator are sequentially connected; the second connecting fitting comprises a first bowl head hanging plate, and the first composite insulator, the first bowl head hanging plate and the suspended weight hammer are sequentially connected; the suspended weight hammer comprises a parallel hanging plate, a weight seat and at least one weight plate, wherein the first bowl head hanging plate, the parallel hanging plate, the weight seat and the weight plate are sequentially connected.

In some embodiments, the first hanger of the first jumper insulator string and the second jumper insulator string is a UB hanger and the first hanger of the third jumper insulator string is a right angle hanger.

In some embodiments, the pylon has a ground wire cross arm and a side phase cross arm, the ground wire cross arm being located above the side phase cross arm, the first jumper insulator string being connected to the ground wire cross arm, the second jumper insulator string being connected to the side phase cross arm.

In some embodiments, the first strain insulator string comprises a third connection fitting, a first insulator string, a first yoke plate and a first strain string connected in sequence, wherein the first insulator string and the first strain string are two; the second strain insulator string and the third strain insulator string comprise a fourth connecting fitting, a second strain insulator string, a second yoke plate, a second strain insulator string, a conductive piece, a third strain insulator string, a third yoke plate, a third strain insulator string, a fourth yoke plate and a fourth strain insulator string which are sequentially connected, wherein the second strain insulator string, the conductive piece, the third strain insulator string and the fourth strain insulator string are two; the third strain insulator string further comprises a T-shaped yoke plate, and the T-shaped yoke plate is connected to the second yoke plate and/or the third yoke plate of the third strain insulator string.

In some embodiments, the third connection fitting and the fourth connection fitting each comprise a first U-shaped hanging ring, an extension ring, a second U-shaped hanging ring and a fifth yoke plate which are connected in sequence; the first insulator string, the second insulator string and the third insulator string all comprise a second hanging plate, a second ball-head hanging ring, a second composite insulator and a second bowl-head hanging plate which are sequentially connected, the second hanging plates of the first insulator string and the second insulator string are connected to the fifth yoke plate, and the second hanging plate of the third insulator string is connected to the fourth yoke plate of the third insulator string; the first tension string, the second tension string, the third tension string and the fourth tension string all comprise a third hanging plate, an adjusting plate, a third U-shaped hanging ring and a tension clamp which are sequentially connected, the third hanging plate of the first tension string is connected with the first connecting plate, the third hanging plate of the second tension string is connected with the second connecting plate, the third hanging plate of the third tension string is connected with the third connecting plate, and the third hanging plate of the fourth tension string is connected with the fourth connecting plate.

In some embodiments, the power transmission line suspension transposition device further comprises a plurality of T-shaped wire clamps, one of the second jumper wires is connected to the third strain insulator string through one of the T-shaped wire clamps, and one of the fourth jumper wires is connected to the second strain insulator string through the other T-shaped wire clamp.

Drawings

Fig. 1 is a schematic perspective view of a transmission line suspension transposition device according to an embodiment of the utility model

Fig. 2 is a schematic diagram of a partial structure of a suspended transposition device for a power transmission line according to an embodiment of the present utility model.

Fig. 3 is an elevation view of a first strain insulator string of an embodiment of the present utility model.

Fig. 4 is a top view of a first strain insulator string of an embodiment of the present utility model.

Fig. 5 is an elevation view of a second strain insulator string of an embodiment of the present utility model.

Fig. 6 is a top view of a second strain insulator string of an embodiment of the present utility model.

Fig. 7 is an elevation view of a third strain insulator string of an embodiment of the present utility model.

Fig. 8 is a top view of a third strain insulator string of an embodiment of the present utility model.

Fig. 9 is a schematic view of a fifth yoke plate and a T-yoke plate of a third strain insulator string of an embodiment of the present utility model.

Fig. 10 is an elevation view of a duplex hardware string according to an embodiment of the utility model.

Fig. 11 is a left side view of a duplex hardware string according to an embodiment of the utility model.

FIG. 12 is an elevation view of a second jumper insulator chain of an embodiment of the utility model.

Fig. 13 is a left side view of a second jumper insulator string of an embodiment of the utility model.

FIG. 14 is an elevation view of a third jumper insulator chain of an embodiment of the utility model.

Fig. 15 is a left side view of a third jumper insulator string of an embodiment of the utility model.

Reference numerals:

iron tower 1; a ground wire cross arm 11; a side-phase cross arm 12;

a first strain insulator string 2; a third connection fitting 21; a first U-shaped hanging ring 211; an extension ring 212; a second U-shaped hanging ring 213; a fifth yoke plate 214; a first insulator string 22; a second hanging plate 221; a second ball-end link 222; a second composite insulator 223; a second bowl head hanging plate 224; a first yoke plate 23; a first tension string 24; a third hanging plate 241; an adjustment plate 242; a third U-shaped hanging ring 243; strain clamp 244;

a second strain insulator string 3; a fourth connection fitting 301; a second insulator string 302; a second link plate 303; a second strain insulator string 304; a conductive member 305; a third tension string 306; a third link plate 307; a third insulator string 308; a fourth link plate 309; a fourth strain insulator string 310;

a third strain insulator string 4; a T-shaped yoke plate 41;

a first jumper 51; a second jumper 52; a third jumper 53; a fourth jumper 54; a fifth jumper 55;

a duplex hardware string 6; a first jumper insulator string 61; a steel pipe 62; a hoop 63; a cap 64; a jumper support 65; a rubber pad 66;

a second jumper insulator string 7; a first connection fitting 71; a first hanging plate 711; a first ball-point suspension loop 712; a first composite insulator 72; a second connection fitting 73; a first bowl head hanging plate 731; a weight 74; parallel hanging plates 741; a weight base 742; a weight piece 743; a suspension clamp 75; aluminum taping 76;

a third jumper insulator string 8;

t-shaped wire clip 9.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

The suspension transposition device for the power transmission line according to the embodiment of the utility model is described below with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, the transmission line suspension transposition device in the embodiment of the utility model includes an iron tower 1, a first strain insulator string 2, a second strain insulator string 3, a third strain insulator string 4, a first jumper 51, a second jumper 52, a third jumper 53, a fourth jumper 54 and a fifth jumper 55.

The number of the first tension insulator strings 2 is at least four, the small-size side A phase, the large-size side A phase, the small-size side B phase and the large-size side C phase of the power transmission line are respectively in one-to-one correspondence with the four first tension insulator strings 2 and are connected to the iron tower 1 through the corresponding first tension insulator strings 2, wherein the small-size side B phase and the large-size side C phase are medium phases, the large-size side B phase of the power transmission line is connected to the iron tower 1 through the second tension insulator string 3, and the small-size side C phase of the power transmission line is connected to the iron tower 1 through the third tension insulator string 4.

The two ends of the first jumper wire 51 are respectively connected with the small-size side A phase and the large-size side A phase, so that the small-size side A phase and the large-size side A phase are communicated through the first jumper wire 51, the two ends of the second jumper wire 52 are respectively connected with the small-size side B phase and the third strain insulator string 4, the two ends of the third jumper wire 53 are respectively connected with the large-size side B phase and the third strain insulator string 4, so that the small-size side B phase and the large-size side B phase are communicated through the second jumper wire 52 and the third jumper wire 53, the two ends of the fourth jumper wire 54 are respectively connected with the small-size side C phase and the second strain insulator string 3, the two ends of the fifth jumper wire 55 are respectively connected with the large-size side C phase and the second strain insulator string 3, and the small-size side C phase is communicated through the fourth jumper wire 54 and the fifth jumper wire 55.

It should be noted that, the first jumper 51 communicates the side phase a that does not need to be commutated, the second jumper 52 and the third jumper 53 communicate the small-size side B with the large-size side B, the middle-size side B is commutated to the side phase, the third jumper 53 and the fourth jumper 54 communicate the small-size side C with the large-size side C, the side phase C is commutated to the middle-size side, and the adjacent phase is commutated in pi-joint engineering.

The suspended transposition device for the power transmission line, provided by the embodiment of the utility model, can be realized on a conventional tension tower without special design transformation or checking calculation on the iron tower 1, saves design time and cost, improves the drawing efficiency, and has the advantages of simple structure, convenience in construction, reliability in operation and low cost compared with a conventional transposition mode.

As shown in fig. 1 and 2, in some embodiments, the transmission line suspension transposition device further includes a duplex hardware string 6, a second jumper insulator string 7 and a third jumper insulator string 8, where the duplex hardware string 6 includes two first jumper insulator strings 61, the two first jumper insulator strings 61 are connected to the iron tower 1 and located above the small-size side C phase and the large-size side B phase, the third jumper 53 is connected to the lower ends of the two first jumper insulator strings 61, the second jumper insulator string 7 is connected to the iron tower 1 and located below the large-size side B phase, the fourth jumper 54 is connected to the second jumper insulator string 7, the third jumper insulator string 8 is connected to the third tension insulator string 4 and located below the third tension insulator string 4, and the fourth jumper 54 is connected to the third jumper insulator string 8.

It can be appreciated that the duplex fitting string 6, the second jumper insulator string 7 and the third jumper insulator string 8 maintain the first jumper 51, the second jumper 52, the third jumper 53, the fourth jumper 54, the fifth jumper 55, the transmission line and the conductive part of the iron tower 1 at a sufficient electrical distance, so as to avoid the risk of short circuit and the like.

As shown in fig. 10 to 15, in some embodiments, the first jumper insulator string 61, the second jumper insulator string 7 and the third jumper insulator string 8 each include a first connection fitting 71, a first composite insulator 72, a second connection fitting 73 and a sling weight 74 which are sequentially connected, the first composite insulator 72 is connected to the iron tower 1 or the third tension insulator string 4 through the first connection fitting 71, and the sling weight 74 increases damping of the composite insulator and reduces frequency and amplitude of swinging of the composite insulator due to wind force.

As shown in fig. 10 to 15, further, the duplex hardware string 6 further includes a steel pipe 62, a hoop 63, end capping covers 64, jumper wire support frames 65 and rubber pads 66, the steel pipe 62 is connected to the two first jumper wire insulator strings 61 through the hoop 63, the end capping covers 64 are two, the two end capping covers 64 are respectively connected to two ends of the steel pipe 62 to close two ends of the steel pipe 62, the jumper wire support frames 65 are connected to the two first jumper wire insulator strings 61, the fifth jumper wire 55 is connected to the jumper wire support frames 65 through the steel pipe 62, and the rubber pads 66 are connected to the jumper wire support frames 65.

The second jumper insulator string 7 and the third jumper insulator string 8 also comprise a suspension clamp 75 and an aluminum wrapping tape 76, the second connecting fitting 73, the suspension clamp 75 and the sling weight 74 are sequentially connected, the suspension clamp 75 is used for fixing a wire on the second jumper insulator string 7 or the third jumper insulator string 8, and the aluminum wrapping tape 76 is wound on the wire.

As shown in fig. 10 to 15, in some embodiments, the first connection fitting 71 includes a first hanging plate 711 and a first ball-head hanging ring 712, and the first hanging plate 711, the first ball-head hanging ring 712, and the first composite insulator 72 are sequentially connected; the second connection fitting 73 includes a first bowl head hanging plate 731, and the first composite insulator 72, the first bowl head hanging plate 731, and the suspended weight 74 are sequentially connected; the suspension weight 74 includes a parallel plate 741, a weight base 742 and at least one weight piece 743, and the first bowl-head plate 731, the parallel plate 741, the weight base 742 and the weight piece 743 are connected in sequence.

As shown in fig. 12 and 14, in some embodiments, the first hanger 711 of the first and second jumper insulator strings 61 and 7 is a UB hanger and the first hanger 711 of the third jumper insulator string 8 is a right angle hanger.

As shown in fig. 1, in some embodiments, the iron tower 1 has a ground wire cross arm 11 and a side phase cross arm 12, the ground wire cross arm 11 is located above the side phase cross arm 12, a first jumper insulator string 61 is connected to the ground wire cross arm 11, and a second jumper insulator string 7 is connected to the side phase cross arm 12.

As shown in fig. 3 to 9, in some embodiments, the first strain insulator string 2 includes a third connection fitting 21, a first insulator string 22, a first yoke plate 23, and a first strain insulator string 24, which are sequentially connected, and two first insulator strings 22 and 24 are provided; the second tension insulator string 3 and the third tension insulator string 4 respectively comprise a fourth connecting fitting 301, a second insulator string 302, a second linkage 303, a second tension insulator string 304, a conductive piece 305, a third tension insulator string 306, a third linkage 307, a third insulator string 308, a fourth linkage 309 and a fourth tension insulator string 310 which are sequentially connected, and two second insulator strings 302, 304, conductive pieces 305, third tension insulator strings 306, third insulator strings 308 and fourth tension insulator strings 310 are respectively arranged; the third string 4 further includes a T-shaped yoke plate 41, the T-shaped yoke plate 41 being connected to the second yoke plate 303 and/or the third yoke plate 307 of the third string 4.

As shown in fig. 3 to 9, in some embodiments, the third connection fitting 21 and the fourth connection fitting 301 each include a first U-shaped link 211, an extension ring 212, a second U-shaped link 213, and a fifth link 214 connected in sequence; the first insulator string 22, the second insulator string 302 and the third insulator string 308 comprise a second hanging plate 221, a second ball-head hanging ring 222, a second composite insulator 223 and a second bowl-head hanging plate 224 which are sequentially connected, the second hanging plates 221 of the first insulator string 22 and the second insulator string 302 are connected to the fifth connecting plate 214, and the second hanging plate 221 of the third insulator string 308 is connected to the fourth connecting plate 309 of the third insulator string 308; the first tension string 24, the second tension string 304, the third tension string 306 and the fourth tension string 310 each include a third hanging plate 241, an adjusting plate 242, a third U-shaped hanging ring 243 and a tension clamp 244 connected in sequence, the third hanging plate 241 of the first tension string 24 is connected to the first connecting plate 23, the third hanging plate 241 of the second tension string 304 is connected to the second connecting plate 303, the third hanging plate 241 of the third tension string 306 is connected to the third connecting plate 307, and the third hanging plate 241 of the fourth tension string 310 is connected to the fourth connecting plate 309.

As shown in fig. 2, in some embodiments, the transmission line floating transposition device further includes a plurality of T-shaped wire clamps 9, one second jumper 52 is connected to the third strain insulator string 4 through one T-shaped wire clamp 9, and one fourth jumper 54 is connected to the second strain insulator string 3 through the other T-shaped wire clamp 9.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean 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 utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.

Claims (10)

1. The utility model provides a unsettled transposition device of transmission line which characterized in that includes:

iron tower;

the transmission line comprises at least four first tension insulator strings, wherein a small-size side A phase, a large-size side A phase, a small-size side B phase and a large-size side C phase of the transmission line are respectively in one-to-one correspondence with the four first tension insulator strings and are connected to the iron tower through the corresponding first tension insulator strings, and the small-size side B phase and the large-size side C phase are middle phases;

the large-size side B phase of the power transmission line is connected to the iron tower through the second strain insulator string;

the small-size side C phase of the power transmission line is connected to the iron tower through the third strain insulator string;

the two ends of the first jumper are respectively connected with the small-size side A phase and the large-size side A phase, so that the small-size side A phase and the large-size side A phase are communicated through the first jumper;

the two ends of the third jumper are respectively connected with the large-size side B phase and the third strain insulator string, so that the small-size side B phase and the large-size side B phase are communicated through the second jumper and the third jumper;

the two ends of the fifth jumper are respectively connected with the large-size side C phase and the second tension insulator string, so that the small-size side C phase and the large-size side C phase are communicated through the fourth jumper and the fifth jumper.

2. The transmission line floating transposition device according to claim 1, further comprising:

the double-wire fitting string comprises two first jumper insulator strings, the two first jumper insulator strings are connected to the iron tower and located above the small-size side C phase and the large-size side B phase, and the third jumper wires are respectively connected to the lower ends of the two first jumper insulator strings;

the second jumper insulator string is connected to the iron tower and positioned below the large-size side B phase, and the fourth jumper is connected to the second jumper insulator string;

and the third jumper insulator string is connected with the third tension insulator string and is positioned below the third tension insulator string, and the fourth jumper is connected with the third jumper insulator string.

3. The power transmission line suspension transposition device according to claim 2, characterized in that the first jumper insulator string, the second jumper insulator string and the third jumper insulator string all comprise a first connecting fitting, a first composite insulator, a second connecting fitting and a hanging weight hammer which are sequentially connected, and the first composite insulator is connected to the iron tower or the third strain insulator string through the first connecting fitting.

4. The power transmission line suspension transposition device according to claim 3, characterized in that the duplex hardware string further comprises a steel pipe, a hoop, a sealing end cover, a jumper wire support frame and a rubber pad, wherein the steel pipe is connected to the two first jumper wire insulator strings through the hoop, the sealing end covers are two, the sealing end covers are respectively connected to the two ends of the steel pipe to seal the two ends of the steel pipe, the jumper wire support frame is connected to the two first jumper wire insulator strings, the fifth jumper wire is connected to the jumper wire support frame through the steel pipe, and the rubber pad is connected to the jumper wire support frame;

the second jumper insulator string and the third jumper insulator string also comprise suspension clamps and aluminum wrapping bands, the second connecting fitting, the suspension clamps and the suspended weight hammer are sequentially connected, the suspension clamps are used for fixing wires on the second jumper insulator string or the third jumper insulator string, and the aluminum wrapping bands are wound on the wires.

5. The power transmission line suspension transposition device according to claim 3, characterized in that the first connection fitting comprises a first hanging plate and a first ball hanging ring, and the first hanging plate, the first ball hanging ring and the first composite insulator are sequentially connected;

the second connecting fitting comprises a first bowl head hanging plate, and the first composite insulator, the first bowl head hanging plate and the suspended weight hammer are sequentially connected;

the suspended weight hammer comprises a parallel hanging plate, a weight seat and at least one weight plate, wherein the first bowl head hanging plate, the parallel hanging plate, the weight seat and the weight plate are sequentially connected.

6. The power transmission line suspended transposition device of claim 5, wherein the first hanging plate of the first jumper insulator string and the second jumper insulator string is a UB hanging plate, and the first hanging plate of the third jumper insulator string is a right angle hanging plate.

7. The overhead transposition device for a power transmission line according to claim 2, wherein the iron tower is provided with a ground wire cross arm and a side phase cross arm, the ground wire cross arm is located above the side phase cross arm, the first jumper insulator string is connected to the ground wire cross arm, and the second jumper insulator string is connected to the side phase cross arm.

8. The power transmission line suspension transposition device according to claim 1, wherein the first strain insulator string comprises a third connecting fitting, a first insulator string, a first yoke plate and a first strain insulator string which are sequentially connected, and the first insulator string and the first strain insulator string are two;

the second strain insulator string and the third strain insulator string comprise a fourth connecting fitting, a second strain insulator string, a second yoke plate, a second strain insulator string, a conductive piece, a third strain insulator string, a third yoke plate, a third strain insulator string, a fourth yoke plate and a fourth strain insulator string which are sequentially connected, wherein the second strain insulator string, the conductive piece, the third strain insulator string and the fourth strain insulator string are two;

the third strain insulator string further comprises a T-shaped yoke plate, and the T-shaped yoke plate is connected to the second yoke plate and/or the third yoke plate of the third strain insulator string.

9. The power transmission line suspension transposition device according to claim 8, wherein the third connection fitting and the fourth connection fitting comprise a first U-shaped hanging ring, an extension ring, a second U-shaped hanging ring and a fifth yoke plate which are sequentially connected;

the first insulator string, the second insulator string and the third insulator string all comprise a second hanging plate, a second ball-head hanging ring, a second composite insulator and a second bowl-head hanging plate which are sequentially connected, the second hanging plates of the first insulator string and the second insulator string are connected to the fifth yoke plate, and the second hanging plate of the third insulator string is connected to the fourth yoke plate of the third insulator string;

the first tension string, the second tension string, the third tension string and the fourth tension string all comprise a third hanging plate, an adjusting plate, a third U-shaped hanging ring and a tension clamp which are sequentially connected, the third hanging plate of the first tension string is connected with the first connecting plate, the third hanging plate of the second tension string is connected with the second connecting plate, the third hanging plate of the third tension string is connected with the third connecting plate, and the third hanging plate of the fourth tension string is connected with the fourth connecting plate.

10. The overhead transposition device for a power transmission line according to any one of claims 1-9, further comprising a plurality of T-clamps, one of the second jumpers being connected to the third strain insulator string by one of the T-clamps, and one of the fourth jumpers being connected to the second strain insulator string by the other of the T-clamps.