CN215055888U - 500kV line strain iron tower with 180-degree corner - Google Patents

500kV line strain iron tower with 180-degree corner Download PDF

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CN215055888U
CN215055888U CN202120232124.8U CN202120232124U CN215055888U CN 215055888 U CN215055888 U CN 215055888U CN 202120232124 U CN202120232124 U CN 202120232124U CN 215055888 U CN215055888 U CN 215055888U
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hanging point
wire hanging
upper layer
layer wire
cross arm
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李奇峰
刘杰锋
柏丹丹
付金琪
张耀民
黄珣
戴雨剑
吴炜
吴启维
王帅
王睿
郑晓斌
梁立龙
赵思远
史永宏
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State Grid Jibei Electric Power Co ltd Engineering Management Branch
North China Power Engineering Co Ltd of China Power Engineering Consulting Group
North China Power Engineering Beijing Co Ltd
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State Grid Jibei Electric Power Co ltd Engineering Management Branch
North China Power Engineering Co Ltd of China Power Engineering Consulting Group
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Abstract

The utility model provides a 500kV circuit strain insulator type iron tower that corner number of degrees is 180 has the body of the tower, and symmetrical upper wire cross arm and lower floor's wire cross arm about its upper and lower parallel is equipped with. The left end point and the right end point of the upper layer wire cross arm are respectively provided with a first upper layer wire hanging point and a third upper layer wire hanging point, the horizontal heights of the first upper layer wire hanging point and the third upper layer wire hanging point are the same, and a second upper layer wire hanging point is arranged in the middle of the intersection of a straight line where the first upper layer wire hanging point and the third upper layer wire hanging point are connected and the tower body. The left end point and the right end point of the lower layer wire cross arm are respectively provided with a first lower layer wire hanging point and a third upper layer wire hanging point, the horizontal heights of the first lower layer wire hanging point and the third lower layer wire hanging point are the same, and a second lower layer wire hanging point is arranged in the middle of the intersection of a straight line where the first lower layer wire hanging point and the third lower layer wire hanging point are connected and the tower body. The method has the advantages that the erection mode that the direct line turning angle is larger than 90 degrees is realized, the length of the erection path is shortened, the occupied land resources are reduced, and the influence on the environment ecology can be effectively reduced in an environment sensitive zone.

Description

500kV line strain iron tower with 180-degree corner
Technical Field
The utility model relates to a transmission line field especially indicates a 500kV circuit strain insulator type iron tower that corner number of degrees is 180.
Background
At present, the design range of the rotation angle degree of a tension tower of a common power transmission line is only 0-90 degrees, and if a larger-angle turning needs to be realized, the turning can be realized only by using a multi-base iron tower. Specifically, for example, as shown in fig. 1, the outgoing line interval of the substation is O, and the terminal tower is located at a point a, but the line drop point direction needs to be along the direction D → E, and in general, in order to ensure that the angle degree of each corner tower is between 0 ° and 90 °, a corner erecting manner similar to the line erection of the transmission tower O → a → B → C → D → E is usually adopted. However, in the actual power transmission line erection, due to special conditions such as the erection of landforms, environmental protection, land planning and the like, the erection of the corner tower according to the corner line direction is very difficult or even impossible.
In order to solve the technical problem, a 500kV line tension-resistant type iron tower with a corner degree of 180 ° needs to be innovatively provided, the corner tower is arranged at the position a in fig. 1, so that the direct O → A → D → E erecting mode of the line is realized, the actual erecting requirement that the corner degree is greater than 90 ° is effectively met, and the material and labor costs for erecting the power transmission line are greatly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a 500kV circuit strain insulator type iron tower that corner number of degrees is 180 promptly.
The technical means adopted by the utility model are as follows.
The utility model provides a 500kV circuit strain insulator type iron tower that corner number of degrees is 180 has the body of the tower, its characterized in that, the parallel upper wire cross arm and the lower floor wire cross arm that is symmetrical about being equipped with of above-mentioned body of the tower. The left end point and the right end point of the upper layer wire cross arm are respectively provided with a first upper layer wire hanging point and a third upper layer wire hanging point, the horizontal heights of the first upper layer wire hanging point and the third upper layer wire hanging point are the same, and a second upper layer wire hanging point is arranged in the middle of the intersection of a straight line where the first upper layer wire hanging point and the third upper layer wire hanging point are connected and the tower body. The left end point and the right end point of the lower layer wire cross arm are respectively provided with a first lower layer wire hanging point and a third upper layer wire hanging point, the horizontal heights of the first lower layer wire hanging point and the third lower layer wire hanging point are the same, and a second lower layer wire hanging point is arranged in the middle of the intersection of a straight line where the first lower layer wire hanging point and the third lower layer wire hanging point are connected and the tower body. And a first upper-layer ground wire hanging point and a second upper-layer ground wire hanging point are respectively arranged on the left end point and the right end point of the upper-layer ground wire cross arm at the same horizontal height.
Furthermore, a lower-layer ground wire cross arm which is symmetrical left and right is arranged above the lower-layer lead wire cross arm and below the upper-layer lead wire cross arm; the left-right extension length of the lower-layer ground wire cross arm is smaller than that of the upper-layer ground wire cross arm; and a first lower-layer ground wire hanging point and a second lower-layer ground wire hanging point are respectively arranged on the left end point and the right end point of the lower-layer ground wire cross arm at the same horizontal height.
Further, upper layer wire strain strings are respectively arranged at the first upper layer wire hanging point, the second upper layer wire hanging point and the third upper layer wire hanging point; and lower layer wire strain strings are respectively arranged at the first lower layer wire hanging point, the second lower layer wire hanging point and the third lower layer wire hanging point.
Furthermore, the three-phase upper wires led out from the first upper wire hanging point, the second upper wire hanging point and the third upper wire hanging point are respectively conducted with the three-phase lower wires led out from the first lower wire hanging point, the second lower wire hanging point and the third lower wire hanging point through the upper wire tension string and the lower wire tension string which respectively correspond to each other from top to bottom.
Furthermore, the first upper layer ground wire hanging point and the second upper layer ground wire hanging point are respectively led out of an upper layer ground wire.
Further, the lower-layer ground wires respectively led out from the first lower-layer ground wire hanging point and the second lower-layer ground wire hanging point are respectively connected with the framework ground wire column, and then are respectively connected to the first upper-layer ground wire hanging point and the second upper-layer ground wire hanging point upwards along the lower-layer ground wire cross arm and the tower body by utilizing clamps.
Furthermore, the three phases of the upper layer wires are respectively and correspondingly connected to the adjacent line iron towers, and the three phases of the lower layer wires are respectively and correspondingly connected to the framework.
Furthermore, each upper ground wire is correspondingly connected to the adjacent line iron tower.
Furthermore, each of the lower ground lines is correspondingly connected to the frame.
The utility model discloses produced beneficial effect as follows.
The utility model discloses the innovation provides a 500kV circuit strain insulator type iron tower that the corner number of degrees is 180, it is greater than 90 the mode of erectting to have realized the direct corner of circuit, the mode of two-layer horizontal arrangement about the wire adopts, utilize the difference in height to realize at strain insulator iron tower homonymy inlet wire and the demand of being qualified for the next round of competitions, both sides arrangement about the ground wire also adopts simultaneously, the electric intercommunication of ground wire has been compromise in realizing lightning protection, thereby solved transmission line and erect the transfer angle and can only be between 0 to 90 and actually erect the environment and can not satisfy the actual difficulty of erectting the condition, and further effectively shortened and erect path length, reduce and occupy land resource, can also effectively reduce the influence to the environmental ecology in the sensitive area of environment, manpower and material resources cost have been reduced to erect, realized protecting natural environment and the win-win of economic benefits.
Drawings
Fig. 1 is a schematic diagram of an existing erection route for realizing 180 ° steering by using a 0 ° to 90 ° angle tower.
Fig. 2 is the structure and hanging point position schematic diagram of the 500kV line tension-resistant iron tower with 180 degrees of angle degree.
Fig. 3 is a schematic side view of the connection mode of the wire and the ground wire of the 500kV line tension-resistant iron tower with the angle degree of 180 degrees.
Fig. 4 is a schematic view of the wire arrangement of the 500kV line strain iron tower with 180 degree angle degree of the utility model.
Fig. 5 is a schematic diagram of the common ground wire arrangement of the 500kV line tension-resistant iron tower with the angle degree of 180 degrees.
Fig. 6 is the utility model discloses the angle number of degrees is 500kV line strain insulator type iron tower's optical cable ground wire arrangement schematic diagram of 180.
Fig. 7 is an example schematic diagram of the cross arm length and the distance between the 500kV line tension-resistant iron tower with the angle degree of 180 degrees.
Fig. 8 is a schematic diagram of the arrangement of the wire and the ground wire between 90 ° and 180 ° at the corner of the 500kV line strain iron tower with a corner degree of 180 °.
Detailed Description
The following description, with reference to the drawings, is a detailed description of a 500kV line tension-resistant iron tower with a 180 ° rotation angle, according to the present invention, including the following specific embodiments, structures, features and effects:
as shown in fig. 2, the utility model relates to a 500kV line strain iron tower with a corner degree of 180 degrees, which comprises a tower body 100, wherein the tower body 100 is provided with an upper layer wire cross arm 10 and a lower layer wire cross arm 20 which are symmetrical from top to bottom. Wherein, the left and right ends of the upper layer wire cross arm 10 are respectively provided with a first upper layer wire hanging point 11 and a third upper layer wire hanging point 13, the first upper layer wire hanging point 11 and the third upper layer wire hanging point 13 have the same horizontal height, and the middle position of the straight line where the two are connected and the tower body 100 are intersected is provided with a second upper layer wire hanging point 12. The left end and the right end of the lower wire cross arm 20 are respectively provided with a first lower wire hanging point 21 and a third upper wire hanging point 23, the first lower wire hanging point 21 and the third lower wire hanging point 23 have the same horizontal height, and a second lower wire hanging point 22 is arranged in the middle of the intersection of the straight line where the first lower wire hanging point 21 and the third lower wire hanging point 23 are connected and the tower body 100. An upper layer ground wire cross arm 30 is arranged above the upper layer wire cross arm 10 in a left-right symmetrical mode, and a first upper layer ground wire hanging point 31 and a second upper layer ground wire hanging point 32 are respectively arranged on the left end point and the right end point of the upper layer ground wire cross arm 30 at the same horizontal height. Further, according to the power transmission engineering requirement, the ground wire is not only a general ground wire having a lightning protection function but also a communication function, for example, an optical cable ground wire, and therefore, it is necessary to provide a lower ground wire cross arm 40 which is bilaterally symmetrical above the lower lead cross arm 20 and below the upper lead cross arm 10, and has a lateral extension length smaller than that of the upper ground wire cross arm 30, and to provide a first lower ground wire hanging point 41 and a second lower ground wire hanging point 42 at the same horizontal height as the left and right ends of the lower ground wire cross arm 40.
Preferably, as shown in fig. 2 and 3, the wire and ground wire connection method of the present invention has the following features:
(1) the first upper layer wire hanging point 11, the second upper layer wire hanging point 12 and the third upper layer wire hanging point 13 are respectively provided with an upper layer wire tension string 14;
(2) the first lower layer wire hanging point 21, the second lower layer wire hanging point 22 and the third lower layer wire hanging point 23 are respectively provided with a lower layer wire tension string 24;
(3) three-phase upper conductors 15 are led out from the first upper conductor hanging point 11, the second upper conductor hanging point 12 and the third upper conductor hanging point 13 and are respectively conducted with three-phase lower conductors 25 led out from the first lower conductor hanging point 21, the second lower conductor hanging point 22 and the third lower conductor hanging point 23 after being subjected to wire jumping through the upper conductor tension string 14 and the lower conductor tension string 24 which respectively correspond to each other from top to bottom;
(4) an upper ground wire 33 is respectively led out from the first upper ground wire hanging point 31 and the second upper ground wire hanging point 32;
(5) the lower ground wires 43 respectively led out from the first lower ground wire hanging point 41 and the second lower ground wire hanging point 42 are respectively connected to the first upper ground wire hanging point 31 and the second upper ground wire hanging point 32 by using clamps respectively along the lower ground wire cross arm 40 and the tower body 100 upwards after being respectively connected to the framework ground wire column.
Preferably, as shown in fig. 4, the wire arrangement mode of the present invention with a 180 ° corner is that the three-phase upper layer wires 15 are respectively and correspondingly connected to the adjacent line towers, and the three-phase lower layer wires 25 are respectively and correspondingly connected to the framework.
Preferably, as shown in fig. 5, the common ground wire arrangement of the present invention only requires that each upper ground wire 33 is correspondingly connected to the adjacent line towers.
Preferably, as shown in fig. 6, the optical cable ground wire arrangement mode not only requires that each upper ground wire 33 be respectively and correspondingly connected to the adjacent line towers, but also requires that each lower ground wire 43 be respectively and correspondingly connected to the framework.
In addition, as shown in fig. 7, the length and the distance of each cross arm of the present invention may satisfy the following requirements:
(1) the height difference between the upper layer lead and the ground wire needs to meet the requirement of the distance between the next grade, namely the grade within the length of the grade AD, and the central lead and the ground wire, specifically, the distance between the lead and the ground wire at the centre of the grade of the common grade meets the following formula: s is more than or equal to 0.015L +1 (wherein S is the distance between a lead and the ground in a unit of m, L is the span in a unit of m, and the set environmental calculation condition is that the air temperature is more than 15 ℃, no wind exists and no ice exists);
(2) the height difference between the lower layer lead and the ground wire needs to meet the requirement of the distance between the upper grade, namely the OA length inner grade of the span, and the central lead and ground wire, and also needs to meet the formula: s is more than or equal to 0.015L +1 (wherein S is the distance between a lead and the ground in a unit of m, L is the span in a unit of m, and the set environmental calculation condition is that the air temperature is more than 15 ℃, no wind exists and no ice exists);
(3) the length of the upper layer ground wire cross arm needs to meet the requirement of a protection angle of a lead, for example, for a 500kV single loop, the generated angle is not more than 10 degrees;
(4) the wire cross arm length needs to meet air gap requirements, such as the minimum clearance settings for each section under different operating conditions shown in table 1 below:
TABLE-1, 180 ℃ minimum air gap data of strain tower (unit: m)
Figure BDA0002919241410000051
Figure BDA0002919241410000061
As shown in fig. 8, the utility model discloses not only can realize 180 degrees circuit erects of corner, also can realize more than 90 degrees and be less than 180 degrees corner erects the condition simultaneously, but it needs to pay attention to this moment lower floor's ground wire cross arm 40 can not cancel because of need undertake ordinary ground wire lightning protection.
Corner number of degrees be 180 500kV circuit strain insulator type iron tower, realized that the direct corner of circuit is greater than 90 the mode of erectting, solved transmission line and erect the transfer angle and can only be between 0 to 90 and actually erect the environment and can not satisfy the actual difficulty of erectting the condition, and further effectively shortened and erect path length, reduce and occupy the land resource, can also effectively reduce the influence to the environmental ecology in the sensitive area of environment, reduced and erect manpower and material resources cost, realized the win-win of protection natural environment and promotion economic benefits.

Claims (9)

1. A500 kV line tension-resistant iron tower with a 180-degree angle is provided with a tower body (100), and is characterized in that an upper layer wire cross arm (10) and a lower layer wire cross arm (20) which are symmetrical left and right are arranged on the tower body (100) in parallel up and down;
the left end point and the right end point of the upper layer wire cross arm (10) are respectively provided with a first upper layer wire hanging point (11) and a third upper layer wire hanging point (13), the horizontal heights of the first upper layer wire hanging point (11) and the third upper layer wire hanging point (13) are the same, and a second upper layer wire hanging point (12) is arranged in the middle position of the intersection of a straight line where the first upper layer wire hanging point and the third upper layer wire hanging point are connected and the tower body (100);
a first lower-layer wire hanging point (21) and a third lower-layer wire hanging point (23) are respectively arranged at the left end point and the right end point of the lower-layer wire cross arm (20), the horizontal heights of the first lower-layer wire hanging point (21) and the third lower-layer wire hanging point (23) are the same, and a second lower-layer wire hanging point (22) is arranged in the middle of the intersection of a straight line where the first lower-layer wire hanging point and the third lower-layer wire hanging point are connected and the tower body (100);
and a left upper layer ground wire cross arm (30) and a right upper layer ground wire cross arm (30) are symmetrically arranged above the upper layer lead wire cross arm (10), and a first upper layer ground wire hanging point (31) and a second upper layer ground wire hanging point (32) are respectively arranged on the left end point and the right end point of the upper layer ground wire cross arm (30) at the same horizontal height.
2. The 500kV line tension-resistant type iron tower with the rotation angle of 180 degrees according to claim 1, wherein a lower layer ground wire cross arm (40) which is symmetrical left and right is further arranged above the lower layer wire cross arm (20) and below the upper layer wire cross arm (10);
the left-right extension length of the lower layer ground wire cross arm (40) is smaller than that of the upper layer ground wire cross arm (30);
and a first lower-layer ground wire hanging point (41) and a second lower-layer ground wire hanging point (42) are respectively arranged on the left end point and the right end point of the lower-layer ground wire cross arm (40) at the same horizontal height.
3. The 500kV line tension-resistant type iron tower with the rotation angle of 180 degrees according to claim 1, wherein upper layer wire tension-resistant strings (14) are respectively arranged at the first upper layer wire hanging point (11), the second upper layer wire hanging point (12) and the third upper layer wire hanging point (13);
and lower-layer wire strain insulator-strings (24) are respectively arranged at the first lower-layer wire hanging point (21), the second lower-layer wire hanging point (22) and the third lower-layer wire hanging point (23).
4. The 500kV line tension-resistant type iron tower with the rotation angle of 180 degrees according to claim 3, wherein three-phase upper conductors (15) are led out from the first upper conductor hanging point (11), the second upper conductor hanging point (12) and the third upper conductor hanging point (13) and are respectively conducted with three-phase lower conductors (25) led out from the first lower conductor hanging point (21), the second lower conductor hanging point (22) and the third lower conductor hanging point (23) through the upper conductor tension-resistant string (14) and the lower conductor tension-resistant string (24) which respectively correspond to each other from top to bottom.
5. The 500kV line tension-resistant type iron tower with the rotation angle of 180 degrees according to claim 1, wherein upper ground wires (33) are led out from the first upper ground wire hanging point (31) and the second upper ground wire hanging point (32) respectively.
6. The 500kV line tension-resistant type iron tower with the rotation angle of 180 degrees according to claim 2, wherein the lower ground wires (43) respectively led out from the first lower ground wire hanging point (41) and the second lower ground wire hanging point (42) are respectively connected with a framework ground wire column and then respectively connected to the first upper ground wire hanging point (31) and the second upper ground wire hanging point (32) upwards along the lower ground wire cross arm (40) and the tower body (100) by using clamps.
7. The 500kV line tension tower with the rotation angle of 180 degrees according to claim 4, wherein the three phases of the upper layer wires (15) are respectively and correspondingly connected to adjacent line towers, and the three phases of the lower layer wires (25) are respectively and correspondingly connected to the framework.
8. The 500kV line tension-resistant type iron tower with the rotation angle of 180 degrees according to claim 5, wherein each upper layer ground wire (33) is correspondingly connected to the adjacent line iron towers.
9. The 500kV line tension-resistant tower with the rotation angle of 180 degrees according to claim 6, wherein each lower ground wire (43) is correspondingly connected to the framework.
CN202120232124.8U 2021-01-27 2021-01-27 500kV line strain iron tower with 180-degree corner Active CN215055888U (en)

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