CN207813168U - Singly cut-off π sections towers in double loop - Google Patents

Singly cut-off π sections towers in double loop Download PDF

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Publication number
CN207813168U
CN207813168U CN201820037084.XU CN201820037084U CN207813168U CN 207813168 U CN207813168 U CN 207813168U CN 201820037084 U CN201820037084 U CN 201820037084U CN 207813168 U CN207813168 U CN 207813168U
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China
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cross
arm
rectangular
connects
horizontal plane
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CN201820037084.XU
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薛韬
乔黎伟
王波
谢建江
呼喜迎
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JIANGSU KENENG ELECTRIC ENGINEERING CONSULTATION Co Ltd
Economic and Technological Research Institute of State Grid Jiangsu Electric Power Co Ltd
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JIANGSU KENENG ELECTRIC ENGINEERING CONSULTATION Co Ltd
Economic and Technological Research Institute of State Grid Jiangsu Electric Power Co Ltd
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Abstract

The utility model discloses a kind of double loop and singly cut-offs π sections towers;The technical issues of solution:Easily form gore for existing form of cut-offfing, cause floor space larger, shaft tower quantity increase, cost of investment increase the technical issues of.The technical solution of use:π sections towers are singly cut-off in a kind of double loop, including pylon and the cross-arm that is arranged on pylon;Cross-arm is from the downward arranged for interval in pylon top:First cross-arm and the second cross-arm are horizontally disposed with the first π in the free end of the second cross-arm and connect cross-arm;Third cross-arm and the 4th cross-arm are horizontally disposed with the 2nd π in the free end of the 4th cross-arm and connect cross-arm;5th cross-arm and the 6th cross-arm are horizontally disposed with the 3rd π in the free end of the 6th cross-arm and connect cross-arm;7th cross-arm and the 8th cross-arm are horizontally disposed with the 4th π in the free end of the 8th cross-arm and connect cross-arm.Advantage, this steel tower can cut-off circuit, it is only necessary to which a base steel tower, which can be completed, cut-offs circuit by what three base branch towers could be completed.

Description

Singly cut-off π sections towers in double loop
Technical field
π sections towers are singly cut-off in a kind of double loop of the utility model design, belong to field of electrical equipment.
Background technology
With rapid economic development, various regions power demand greatly improves, and high-tension line is also more and more intensive.By electric system The influence of planning demand, substation site selection economize the land resource to reduce line corridor, close to existing line when usual addressing Addressing is to access substation after facilitating existing line to cut-off, and when conventional double back transmission line unilateral side is cut-off, needs double using three bases Circuit is cut-off in the completion of branch of a circuit tower, and this form of cut-offfing easily forms gore, causes floor space larger, shaft tower quantity Increase, cost of investment increases.
Utility model content
Technical problem to be solved in the utility model is:Routine double back transmission line list mentioned in the background art When side is cut-off, need to cut-off circuit using the completion of three base branch towers, this pattern of cut-offfing easily forms gore, causes to take up an area The technical issues of area is larger, and shaft tower quantity increases, and cost of investment increases.
The purpose of this utility model is to propose that π sections towers are singly cut-off in a kind of double loop, and π sections towers are singly cut-off in this double loop Use can make need three base double loop branch towers to complete in the past to cut-off circuit, can be realized by a base steel tower;To reach To the use for reducing branch tower, land seizure, the purpose of cost saving are reduced.
In order to solve the above technical problems, the technical solution adopted in the utility model is:
π sections towers, including pylon are singly cut-off in a kind of double loop, further include the cross-arm being arranged on pylon;Cross-arm is from pylon The downward arranged for interval in top:
The top that first cross-arm and the second cross-arm, the first cross-arm and the second cross-arm may be contained within pylon is positioned at the two of pylon Side, the first cross-arm and the second cross-arm are ground wire cross-arm, and the first cross-arm and the second cross-arm are generally aligned in the same plane interior;First cross-arm Upper surface is flushed with horizontal plane, the rectangular triangle of orthographic projection of the first cross-arm, and the projection of the first cross-arm in the horizontal plane is in ladder Shape, the rectangular cross-section of the first cross-arm;The upper surface of second cross-arm is flushed with horizontal plane, the orthographic projection rectangular three of the second cross-arm Angular, the projection of the second cross-arm in the horizontal plane is trapezoidal, the rectangular cross-section of the second cross-arm;In the free end water of the second cross-arm The first π of flat setting connects cross-arm, and it is vertical with the second cross-arm that the first π connects cross-arm;The orthographic projection that first π connects cross-arm is rectangular, and the first π connects The projection of cross-arm in the horizontal plane is rectangular, and the first π connects the rectangular cross-section of cross-arm;
Third cross-arm and the 4th cross-arm, third cross-arm and the 4th cross-arm are arranged on pylon and positioned at the first cross-arms and the The lower section of two cross-arms, third cross-arm and the 4th cross-arm are located at the both sides of pylon, and third cross-arm and the 4th cross-arm are that upper conducting wire is horizontal In load, third cross-arm and the 4th cross-arm are generally aligned in the same plane;The lower surface of third cross-arm is flushed with horizontal plane, and third cross-arm is just Rectangular triangle is projected, the projection of third cross-arm in the horizontal plane is rectangular, the rectangular cross-section of third cross-arm;4th cross-arm Lower surface flushed with horizontal plane, the rectangular triangle of orthographic projection of the 4th cross-arm, the projection of the 4th cross-arm in the horizontal plane is in Rectangle, the rectangular cross-section of the 4th cross-arm;Be horizontally disposed with the 2nd π in the free end of the 4th cross-arm and connect cross-arm, the 2nd π connect cross-arm with 4th cross-arm is vertical;The orthographic projection that 2nd π connects cross-arm is rectangular, and it is rectangular that the 2nd π connects the projection of cross-arm in the horizontal plane, and second π connects the rectangular cross-section of cross-arm;
5th cross-arm and the 6th cross-arm, the 5th cross-arm and the 6th cross-arm are arranged on pylon and positioned at third cross-arms and the The lower section of four cross-arms, the 5th cross-arm and the 6th cross-arm are located at the both sides of pylon, and the 5th cross-arm and the 6th cross-arm are that middle conducting wire is horizontal In load, the 5th cross-arm and the 6th cross-arm are generally aligned in the same plane;The lower surface of 5th cross-arm is flushed with horizontal plane, and the 5th cross-arm is just Rectangular triangle is projected, the projection of the 5th cross-arm in the horizontal plane is rectangular, the rectangular cross-section of the 5th cross-arm;6th cross-arm Lower surface flushed with horizontal plane, the rectangular triangle of orthographic projection of the 6th cross-arm, the projection of the 6th cross-arm in the horizontal plane is in Rectangle, the rectangular cross-section of the 6th cross-arm;Be horizontally disposed with the 3rd π in the free end of the 6th cross-arm and connect cross-arm, the 3rd π connect cross-arm with 6th cross-arm is vertical;The orthographic projection that 3rd π connects cross-arm is rectangular, and it is rectangular that the 3rd π connects the projection of cross-arm in the horizontal plane, third π connects the rectangular cross-section of cross-arm;
7th cross-arm and the 8th cross-arm, the 7th cross-arm and the 8th cross-arm are arranged on pylon and positioned at the 5th cross-arms and the The lower section of six cross-arms, the 7th cross-arm and the 8th cross-arm are located at the both sides of pylon, and the 7th cross-arm and the 8th cross-arm are lower wire cross In load, the 7th cross-arm and the 8th cross-arm are generally aligned in the same plane;The lower surface of 7th cross-arm is flushed with horizontal plane, and the 7th cross-arm is just Rectangular triangle is projected, the projection of the 7th cross-arm in the horizontal plane is trapezoidal, the rectangular cross-section of the 7th cross-arm;8th cross-arm Lower surface flushed with horizontal plane, the rectangular triangle of orthographic projection of the 8th cross-arm, the projection of the 8th cross-arm in the horizontal plane is in It is trapezoidal, the rectangular cross-section of the 8th cross-arm;Be horizontally disposed with the 4th π in the free end of the 8th cross-arm and connect cross-arm, the 4th π connect cross-arm with 8th cross-arm is vertical;The orthographic projection that 4th π connects cross-arm is rectangular, and it is rectangular that the 4th π connects the projection of cross-arm in the horizontal plane, and the 4th π connects the rectangular cross-section of cross-arm;
The free end of all cross-arms is hanging wire point, passes through insulator chain connecting wire;
First π connects after the point of the hanging wire on cross-arm hangs up conducting wire by insulator chain and then constitutes " π types ";
2nd π connects after the point of the hanging wire on cross-arm hangs up conducting wire by insulator chain and then constitutes " π types ";
3rd π connects after the point of the hanging wire on cross-arm hangs up conducting wire by insulator chain and then constitutes " π types ";
4th π connects after the point of the hanging wire on cross-arm hangs up conducting wire by insulator chain and then constitutes " π types ".
All cross-arms are connected to form complete steel truss frame iron tower, cross arm end by bolt and steel tower tower body in the utility model It for hanging wire point, is connect with conducting wire by insulator chain, above-mentioned first π connects the point of the hanging wire on cross-arm and hangs up conducting wire by insulator chain It then constitutes afterwards " π types ";2nd π connects after the point of the hanging wire on cross-arm hangs up conducting wire by insulator chain and then constitutes " π types ";3rd π connects Hanging wire point on cross-arm is then constituted " π types " after hanging up conducting wire by insulator chain;4th π connects the point of the hanging wire on cross-arm and passes through insulation Substring is then constituted " π types " after hanging up conducting wire.
Improvement to technical solutions of the utility model, cross-arm are truss of angle steel type structure.To improve the structural strength of cross-arm, Cross-arm is designed to that triangular truss structure, triangular structure have higher stability, together by the overall weight for reducing cross-arm simultaneously When lighter weight.Cross-arm and tower body material are all made of galvanizing angle steel material.
Improvement to technical solutions of the utility model, all cross-arms are connected by bolt with the tower body of pylon.
According to national standard《110kV~750kV overhead transmission line design specifications》(GB 50545-2010) is to ensure phase Mutually between safe distance, between 220kV power lines and 220kV power lines crossed crossing distance be 4m, 220kV power lines with Crossed crossing distance is 3m between 110kV power lines.
The length of improvement to technical solutions of the utility model, the first cross-arm and the second cross-arm is 6.5m, the first cross-arm And the second spacing between cross-arm and third cross-arm and the 4th cross-arm is 4.5m.
The length of improvement to technical solutions of the utility model, third cross-arm and the 4th cross-arm is 5.3m, third cross-arm And the 4th spacing between cross-arm and the 5th cross-arm and the 6th cross-arm is 6.7m.
The length of improvement to technical solutions of the utility model, the 5th cross-arm and the 6th cross-arm is 6.5m, the 5th cross-arm And the 6th spacing between cross-arm and the 7th cross-arm and the 8th cross-arm is 6.3m.
The length of improvement to technical solutions of the utility model, the 7th cross-arm and the 8th cross-arm is 6.0m.
Improvement to technical solutions of the utility model, the length that the first π connects cross-arm is 5.6m, and the 2nd π meets cross-arm, the 3rd π Connect cross-arm and the 4th π to connect the equal length of cross-arm be 6.4m.Since the first π length for connecing cross-arm is 5.6m, the 2nd π connects cross Load, the 3rd π connect cross-arm and the 4th π to connect the equal length of cross-arm be 6.4m, arrangement of conductor is in inlet wire shelves by being arranged vertically When becoming horizontally arranged, the phase spacing of conducting wire cannot meet code requirement, therefore the utility model is used not as terminal tower, It is only used as the tower that cut-offs among circuit, phase spacing can meet specification and want when the arrangement mode of conducting wire is vertical arrangement It asks.
Compared with prior art, advantage is the utility model:
The steel tower of the utility model can cut-off circuit by what three base branch towers could be completed, it is only necessary to which a base steel tower is It can complete to cut-off circuit.And steel tower voltage class disclosed by the utility model is 220kV.
The steel tower of the utility model meets the need that engineering construction is singly cut-off in the increasingly frequent double loop of transmission line of electricity system It asks.
Description of the drawings
Fig. 1 is the graphics that π sections towers are singly cut-off in double loop.
Fig. 2 is the front view that π sections towers are singly cut-off in double loop.
Fig. 3 is the installation diagram that the first cross-arm, the second cross-arm and the first π connect cross-arm.
Fig. 4 is the installation diagram that third cross-arm, the 4th cross-arm and the 2nd π connect cross-arm.
Fig. 5 is the installation diagram that the 5th cross-arm, the 6th cross-arm and the 3rd π connect cross-arm.
Fig. 6 is the installation diagram that the 7th cross-arm, the 8th cross-arm and the 4th π connect cross-arm.
Fig. 7 is that double loop does not cut-off conspectus.
Fig. 8 is that π link schematic diagrames are singly cut-off in double loop.
Specific implementation mode
Technical solutions of the utility model are described in detail below, but the scope of protection of the utility model is not limited to The embodiment.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing 1- Fig. 8 and Embodiment, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only solving The utility model is released, is not used to limit the utility model.
Embodiment:
As shown in Figure 1, π sections towers, including pylon 9 are singly cut-off in double loop in the present embodiment, further include being arranged on pylon 9 Cross-arm.
As shown in Figure 1, the pylon 9 in the present embodiment, the tower body of pylon is gradually tapered up from its bottom end to upper end, to become the gradient Design uses the pylon for becoming slope design into routine techniques in the prior art.The tower body bottom end opening of the pylon of the present embodiment Size is 9.2m to 11.8m, and the tower body top end opening size of pylon is 2.2m.The tower body angle truss structure of this pylon.This reality Apply the stability that can ensure pylon structure similar to rectangular pyramid of pylon 9 in example.
As shown in Figure 1, the cross-arm in the present embodiment is truss of angle steel type structure.To improve the structural strength of cross-arm, simultaneously Cross-arm is designed to that triangular truss structure, triangular structure have higher stability, while matter by the overall weight for reducing cross-arm Amount is lighter.Cross-arm and tower body material are all made of galvanizing angle steel material.
As illustrated in fig. 1 and 2, all cross-arms are connected to form complete steel truss iron by bolt and steel tower tower body in the present embodiment Tower, cross arm end are hanging wire point, are connect with conducting wire by insulator chain, above-mentioned first π connects the hanging wire point on cross-arm 10 by exhausted Edge substring is then constituted " π types " after hanging up conducting wire;2nd π connects the hanging wire point on cross-arm 11 and hangs up after conducting wire then structure by insulator chain At " π types ";3rd π connects after the hanging wire point on cross-arm 12 hangs up conducting wire by insulator chain and then constitutes " π types ";4th π connects cross-arm Hanging wire point on 13 is then constituted " π types " after hanging up conducting wire by insulator chain.
Line disconnection is a kind of power engineering mesohigh transmission line of alternation current commonly construction technology form, including single loop Double loop is formed after cut-offfing;Double loop forms three circuits after singly cut-offfing;Double loop pair forms four circuits after cut-offfing, and includes commonly Above-mentioned three kinds of forms.
It is illustrated in figure 7 double loop and does not cut-off conspectus, 14 be cross-arm in figure, and 15 be strain insulator, and 16 be the 1st Circuit, 17 be the 2nd circuit.
It refers to that a circuit in two circuits is connect cross-arm by the π on steel tower to be formed that π sections towers are singly cut-off in double loop One new double loop, totally three circuits share the form of a base steel tower, this shape with the other primary Ioops that are not cut-off on steel tower Formula hence obtains one's name as " π " word.
It is illustrated in figure 8 double loop and singly cut-offs π link schematic diagrames.14 be cross-arm in figure, and 15 be strain insulator, and 16 are 1st circuit, 17 be the 2nd circuit, and 18 connect cross-arm for π, and 19 be the 3rd circuit.
As illustrated in fig. 1 and 2, cross-arm is from the downward arranged for interval in 9 top of pylon:
As shown in Figures 2 and 3, the first cross-arm 1 and the second cross-arm 2, the first cross-arm 1 and the second cross-arm 2 are arranged by bolt It is positioned at the both sides of pylon 9 in the top of pylon 9, the first cross-arm 1 and the second cross-arm 2 are ground wire cross-arm, the first cross-arm 1 and the In two cross-arms 2 are generally aligned in the same plane;The upper surface of first cross-arm 1 is flushed with horizontal plane, the orthographic projection rectangular three of the first cross-arm 1 Angular, the projection of the first cross-arm 1 in the horizontal plane is trapezoidal, the rectangular cross-section of the first cross-arm 1;The upper surface of second cross-arm 2 It being flushed with horizontal plane, the rectangular triangle of orthographic projection of the second cross-arm 2, the projection of the second cross-arm 2 in the horizontal plane is trapezoidal, the The rectangular cross-section of two cross-arms 2;Be horizontally disposed with the first π in the free end of the second cross-arm 2 and connect cross-arm 10, the first π connect cross-arm 10 with Second cross-arm 2 is vertical;The orthographic projection that first π connects cross-arm 10 is rectangular, and it is in square that the first π, which connects the projection of cross-arm 10 in the horizontal plane, Shape, the first π connect the rectangular cross-section of cross-arm 10.
First π connects after the hanging wire point on cross-arm 10 hangs up conducting wire by insulator chain and then constitutes " π types ".
As shown in Figures 2 and 4, third cross-arm 3 and the 4th cross-arm 4, third cross-arm 3 and the 4th cross-arm 4 are arranged by bolt Lower section on pylon 9 and positioned at the first cross-arm 1 and the second cross-arm 2, third cross-arm 3 and the 4th cross-arm 4 are located at the two of pylon 9 Side, third cross-arm 3 and the 4th cross-arm 4 are upper conducting wire cross-arm, and third cross-arm 3 and the 4th cross-arm 4 are generally aligned in the same plane interior;Third The lower surface of cross-arm 3 is flushed with horizontal plane, the rectangular triangle of orthographic projection of third cross-arm 3, and third cross-arm 3 is in the horizontal plane Project rectangular, the rectangular cross-section of third cross-arm 3;The lower surface of 4th cross-arm 4 is flushed with horizontal plane, and the 4th cross-arm 4 is just Rectangular triangle is projected, the projection of the 4th cross-arm 4 in the horizontal plane is rectangular, the rectangular cross-section of the 4th cross-arm 4;The 4th The free end of cross-arm 4 is horizontally disposed with the 2nd π and connects cross-arm 11, and it is vertical with the 4th cross-arm 4 that the 2nd π connects cross-arm 11;2nd π connects cross-arm 11 Orthographic projection it is rectangular, the 2nd π connects that the projection of cross-arm 11 in the horizontal plane is rectangular, and the 2nd π connects the rectangular cross-section of cross-arm 11.
2nd π connects after the hanging wire point on cross-arm 11 hangs up conducting wire by insulator chain and then constitutes " π types ".
As shown in figures 2 and 5, the 5th cross-arm 5 and the 6th cross-arm 6, the 5th cross-arm 5 and the 6th cross-arm 6 are arranged by bolt Lower section on pylon 9 and positioned at third cross-arm 3 and the 4th cross-arm 4, the 5th cross-arm 5 and the 6th cross-arm 6 are located at the two of pylon 9 Side, the 5th cross-arm 5 and the 6th cross-arm 6 are middle conducting wire cross-arm, and the 5th cross-arm 5 and the 6th cross-arm 6 are generally aligned in the same plane interior;5th The lower surface of cross-arm 5 is flushed with horizontal plane, the rectangular triangle of orthographic projection of the 5th cross-arm 5, and the 5th cross-arm 5 is in the horizontal plane Project rectangular, the rectangular cross-section of the 5th cross-arm 5;The lower surface of 6th cross-arm 6 is flushed with horizontal plane, and the 6th cross-arm 6 is just Rectangular triangle is projected, the projection of the 6th cross-arm 6 in the horizontal plane is rectangular, the rectangular cross-section of the 6th cross-arm 6;The 6th The free end of cross-arm 6 is horizontally disposed with the 3rd π and connects cross-arm 12, and it is vertical with the 6th cross-arm 6 that the 3rd π connects cross-arm 12;3rd π connects cross-arm 12 Orthographic projection it is rectangular, the 3rd π connects that the projection of cross-arm 12 in the horizontal plane is rectangular, and the 3rd π connects the rectangular cross-section of cross-arm 12.
3rd π connects after the hanging wire point on cross-arm 12 hangs up conducting wire by insulator chain and then constitutes " π types ".
As seen in figs, the 7th cross-arm 7 and the 8th cross-arm 8, the 7th cross-arm 7 and the 8th cross-arm 8 are arranged by bolt Lower section on pylon 9 and positioned at the 5th cross-arm 5 and the 6th cross-arm 6, the 7th cross-arm 7 and the 8th cross-arm 8 are located at the two of pylon 9 Side, the 7th cross-arm 7 and the 8th cross-arm 8 are lower wire cross-arm, in the 7th cross-arm 7 and the 8th cross-arm 8 are generally aligned in the same plane;7th The lower surface of cross-arm 7 is flushed with horizontal plane, the rectangular triangle of orthographic projection of the 7th cross-arm 7, and the 7th cross-arm 7 is in the horizontal plane Project trapezoidal, the rectangular cross-section of the 7th cross-arm 7;The lower surface of 8th cross-arm 8 is flushed with horizontal plane, and the 8th cross-arm 8 is just Rectangular triangle is projected, the projection of the 8th cross-arm 8 in the horizontal plane is trapezoidal, the rectangular cross-section of the 8th cross-arm 8;The 8th The free end of cross-arm 8 is horizontally disposed with the 4th π and connects cross-arm 13, and it is vertical with the 8th cross-arm 8 that the 4th π connects cross-arm 13;4th π connects cross-arm 13 Orthographic projection it is rectangular, the 4th π connects that the projection of cross-arm 13 in the horizontal plane is rectangular, and the 4th π connects the rectangular cross-section of cross-arm 13.
4th π connects after the hanging wire point on cross-arm 13 hangs up conducting wire by insulator chain and then constitutes " π types ".
According to national standard《110kV~750kV overhead transmission line design specifications》GB 50545-2010 are to ensure mutually Between safe distance, between 220kV power lines and 220kV power lines crossed crossing distance be 4m, 220kV power lines with Crossed crossing distance is 3m between 110kV power lines.
As shown in Fig. 2, the length of the first cross-arm 1 and the second cross-arm 2 is 6.5m, the first cross-arm 1 and the second cross-arm 2 and Spacing between three cross-arms 3 and the 4th cross-arm 4 is 4.5m.The length of third cross-arm 3 and the 4th cross-arm 4 is 5.3m, and third is horizontal Spacing between load 3 and the 4th cross-arm 4 and the 5th cross-arm 5 and the 6th cross-arm 6 is 6.7m.The length of 5th cross-arm 5 and the 6th cross-arm 6 Degree is 6.5m, and the spacing between the 5th cross-arm 5 and the 6th cross-arm 6 and the 7th cross-arm 7 and the 8th cross-arm 8 is 6.3m.7th is horizontal Load 7 and the length of the 8th cross-arm 8 are 6.0m.
As shown in Fig. 2, the length that the first π connects cross-arm 10 is 5.6m, the 2nd π connects cross-arm 11, the 3rd π connects cross-arm 12 and the 4th The equal length that π connects cross-arm 13 is 6.4m.Since the first π length for connecing cross-arm 10 is 5.6m, the 2nd π meets cross-arm 11, the 3rd π Connect cross-arm 12 and the 4th π to connect the equal length of cross-arm 13 be 6.4m, arrangement of conductor is become in inlet wire shelves from being arranged vertically When horizontally arranged, the phase spacing of conducting wire cannot meet code requirement, therefore the utility model is used not as terminal tower, is only made It is used for the tower that cut-offs among circuit, phase spacing can meet code requirement when the arrangement mode of conducting wire is vertical arrangement.
As described above, although the utility model has been indicated and described with reference to specific preferred embodiment, it must not It is construed to the limitation to the utility model itself.In the spirit and scope for not departing from the utility model that appended claims define Under the premise of, it can various changes can be made in the form and details to it.

Claims (8)

1. π sections towers, including pylon (9) are singly cut-off in a kind of double loop, which is characterized in that further include being arranged on pylon (9) Cross-arm;Cross-arm is from the downward arranged for interval in pylon (9) top:
The top that first cross-arm (1) and the second cross-arm (2), the first cross-arm (1) and the second cross-arm (2) may be contained within pylon (9) is Both sides positioned at pylon (9), the first cross-arm (1) and the second cross-arm (2) are ground wire cross-arm, the first cross-arm (1) and the second cross-arm (2) in being generally aligned in the same plane;The upper surface of first cross-arm (1) is flushed with horizontal plane, the orthographic projection rectangular three of the first cross-arm (1) Angular, the projection of the first cross-arm (1) in the horizontal plane is trapezoidal, the rectangular cross-section of the first cross-arm (1);Second cross-arm (2) Upper surface is flushed with horizontal plane, the rectangular triangle of orthographic projection of the second cross-arm (2), the throwing of the second cross-arm (2) in the horizontal plane Shadow is trapezoidal, the rectangular cross-section of the second cross-arm (2);It is horizontally disposed with the first π in the free end of the second cross-arm (2) and connects cross-arm (10), it is vertical with the second cross-arm (2) to connect cross-arm (10) by the first π;The orthographic projection that first π connects cross-arm (10) is rectangular, and the first π connects cross The projection of load (10) in the horizontal plane is rectangular, and the first π connects the rectangular cross-section of cross-arm (10);
Third cross-arm (3) and the 4th cross-arm (4), third cross-arm (3) and the 4th cross-arm (4) are arranged on pylon (9) and are located at The lower section of first cross-arm (1) and the second cross-arm (2), third cross-arm (3) and the 4th cross-arm (4) are located at the both sides of pylon (9), third Cross-arm (3) and the 4th cross-arm (4) are upper conducting wire cross-arm, and third cross-arm (3) and the 4th cross-arm (4) are generally aligned in the same plane interior;The The lower surface of three cross-arms (3) is flushed with horizontal plane, and the rectangular triangle of orthographic projection of third cross-arm (3), third cross-arm (3) is in water Projection in plane is rectangular, the rectangular cross-section of third cross-arm (3);The lower surface of 4th cross-arm (4) is flushed with horizontal plane, the The rectangular triangle of orthographic projection of four cross-arms (4), the projection of the 4th cross-arm (4) in the horizontal plane is rectangular, the 4th cross-arm (4) Rectangular cross-section;It is horizontally disposed with the 2nd π in the free end of the 4th cross-arm (4) and connects cross-arm (11), the 2nd π connects cross-arm (11) and the 4th Cross-arm (4) is vertical;The orthographic projection that 2nd π connects cross-arm (11) is rectangular, and it is in square that the 2nd π, which connects the projection of cross-arm (11) in the horizontal plane, Shape, the 2nd π connect the rectangular cross-section of cross-arm (11);
5th cross-arm (5) and the 6th cross-arm (6), the 5th cross-arm (5) and the 6th cross-arm (6) are arranged on pylon (9) and are located at The lower section of third cross-arm (3) and the 4th cross-arm (4), the 5th cross-arm (5) and the 6th cross-arm (6) are located at the both sides of pylon (9), and the 5th Cross-arm (5) and the 6th cross-arm (6) are middle conducting wire cross-arm, and the 5th cross-arm (5) and the 6th cross-arm (6) are generally aligned in the same plane interior;The The lower surface of five cross-arms (5) is flushed with horizontal plane, and the rectangular triangle of orthographic projection of the 5th cross-arm (5), the 5th cross-arm (5) is in water Projection in plane is rectangular, the rectangular cross-section of the 5th cross-arm (5);The lower surface of 6th cross-arm (6) is flushed with horizontal plane, the The rectangular triangle of orthographic projection of six cross-arms (6), the projection of the 6th cross-arm (6) in the horizontal plane is rectangular, the 6th cross-arm (6) Rectangular cross-section;It is horizontally disposed with the 3rd π in the free end of the 6th cross-arm (6) and connects cross-arm (12), the 3rd π connects cross-arm (12) and the 6th Cross-arm (6) is vertical;The orthographic projection that 3rd π connects cross-arm (12) is rectangular, and it is in square that the 3rd π, which connects the projection of cross-arm (12) in the horizontal plane, Shape, the 3rd π connect the rectangular cross-section of cross-arm (12);
7th cross-arm (7) and the 8th cross-arm (8), the 7th cross-arm (7) and the 8th cross-arm (8) are arranged on pylon (9) and are located at The lower section of 5th cross-arm (5) and the 6th cross-arm (6), the 7th cross-arm (7) and the 8th cross-arm (8) are located at the both sides of pylon (9), and the 7th Cross-arm (7) and the 8th cross-arm (8) are lower wire cross-arm, and the 7th cross-arm (7) and the 8th cross-arm (8) are generally aligned in the same plane interior;The The lower surface of seven cross-arms (7) is flushed with horizontal plane, and the rectangular triangle of orthographic projection of the 7th cross-arm (7), the 7th cross-arm (7) is in water Projection in plane is trapezoidal, the rectangular cross-section of the 7th cross-arm (7);The lower surface of 8th cross-arm (8) is flushed with horizontal plane, the The rectangular triangle of orthographic projection of eight cross-arms (8), the projection of the 8th cross-arm (8) in the horizontal plane is trapezoidal, the 8th cross-arm (8) Rectangular cross-section;It is horizontally disposed with the 4th π in the free end of the 8th cross-arm (8) and connects cross-arm (13), the 4th π connects cross-arm (13) and the 8th Cross-arm (8) is vertical;The orthographic projection that 4th π connects cross-arm (13) is rectangular, and it is in square that the 4th π, which connects the projection of cross-arm (13) in the horizontal plane, Shape, the 4th π connect the rectangular cross-section of cross-arm (13);
The free end of all cross-arms is hanging wire point, passes through insulator chain connecting wire;
First π connects after the hanging wire point on cross-arm (10) hangs up conducting wire by insulator chain and then constitutes " π types ";
2nd π connects after the hanging wire point on cross-arm (11) hangs up conducting wire by insulator chain and then constitutes " π types ";
3rd π connects after the hanging wire point on cross-arm (12) hangs up conducting wire by insulator chain and then constitutes " π types ";
4th π connects after the hanging wire point on cross-arm (13) hangs up conducting wire by insulator chain and then constitutes " π types ".
2. π sections towers are singly cut-off in double loop as described in claim 1, which is characterized in that cross-arm is truss of angle steel type structure.
3. π sections towers are singly cut-off in double loop as described in claim 1, which is characterized in that all cross-arms pass through bolt and tower The tower body of frame (9) is connected.
4. π sections towers are singly cut-off in double loop as described in claim 1, which is characterized in that the first cross-arm (1) and the second cross-arm (2) length is 6.5m, between the first cross-arm (1) and the second cross-arm (2) and third cross-arm (3) and the 4th cross-arm (4) between Away from for 4.5m.
5. π sections towers are singly cut-off in double loop as described in claim 1, which is characterized in that third cross-arm (3) and the 4th cross-arm (4) length is 5.3m, between third cross-arm (3) and the 4th cross-arm (4) and the 5th cross-arm (5) and the 6th cross-arm (6) between Away from for 6.7m.
6. π sections towers are singly cut-off in double loop as described in claim 1, which is characterized in that the 5th cross-arm (5) and the 6th cross-arm (6) length is 6.5m, between the 5th cross-arm (5) and the 6th cross-arm (6) and the 7th cross-arm (7) and the 8th cross-arm (8) between Away from for 6.3m.
7. π sections towers are singly cut-off in double loop as described in claim 1, which is characterized in that the 7th cross-arm (7) and the 8th cross-arm (8) length is 6.0m.
8. π sections towers are singly cut-off in double loop as described in claim 1, which is characterized in that the length that the first π connects cross-arm (10) is 5.6m, the 2nd π connects cross-arm (11), the 3rd π connects cross-arm (12) and the 4th π to connect the equal length of cross-arm (13) be 6.4m.
CN201820037084.XU 2018-01-10 2018-01-10 Singly cut-off π sections towers in double loop Active CN207813168U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108005458A (en) * 2018-01-10 2018-05-08 国网江苏省电力公司经济技术研究院 Singly cut-off π sections towers in double loop
CN110939309A (en) * 2019-11-26 2020-03-31 闽江学院 Transmission tower with liftable truss

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108005458A (en) * 2018-01-10 2018-05-08 国网江苏省电力公司经济技术研究院 Singly cut-off π sections towers in double loop
CN110939309A (en) * 2019-11-26 2020-03-31 闽江学院 Transmission tower with liftable truss
CN110939309B (en) * 2019-11-26 2021-10-26 闽江学院 Transmission tower with liftable truss

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