CN102900260B - Cross arm for transmission towers - Google Patents
Cross arm for transmission towers Download PDFInfo
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- CN102900260B CN102900260B CN201210326527.4A CN201210326527A CN102900260B CN 102900260 B CN102900260 B CN 102900260B CN 201210326527 A CN201210326527 A CN 201210326527A CN 102900260 B CN102900260 B CN 102900260B
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- 230000005540 biological transmission Effects 0.000 title abstract description 11
- 239000000463 material Substances 0.000 claims description 158
- 238000003466 welding Methods 0.000 claims description 25
- 241000405070 Percophidae Species 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention provides a cross arm for transmission towers. At least a middle internode is arranged between a first internode and a last internode of the cross arm, the upper planes of the first internode and the last internode are triangular, and the upper plane of the middle internode is a straight line connecting the vertexes of the two triangles. According to the cross arm for transmission towers disclosed by the invention, the stressing features of each rod piece of the cross arm are fully taken into consideration; and the cross arm for transmission towers is concise and reasonable in structural arrangement, thereby reducing the weight of the cross arm.
Description
Technical field
The present invention relates to Transmission Line Design field, be specifically related to a kind of electric power pylon cross-arm.
Background technology
The main material of iron tower of power transmission line cross-arm lower plane is generally by resistance to compression stability contorting, and the main material of upper plane is generally controlled by tensile strength.For electric power pylon, tensile strength controls to be conducive to the supporting capacity giving full play to component, and stable unstable failure can not occur tension member.
Conventional transmission lines road steel tower cross-arm adopts the form of certain thickness right angle trigonometry plated construction always, its structural representation as shown in Figure 1, the lower plane of cross-arm is the rectangle that the limit at the thickness place of a leg-of-mutton right-angle side and set square is formed, parallel to the ground, upper plane is the quadrangle inclined-plane that the limit at the thickness place of hypotenuse and set square is formed, upper plane mainly bears the vertical load of cross-arm hanging point, and do not bear longitudinal unbalance tension force, therefore on connection cross-arm, between plane two main materials, oblique material needs to disconnect in end or root, namely end or root do not arrange X-braced panels, this kind arranges that cross-arm form causes the waste of the oblique material of plane on cross-arm to a certain extent.
Summary of the invention
Have between at least one middle node between first internode of a kind of described cross-arm provided by the invention and last internode, the upper plane of described first and last internode is triangle, and the upper plane of intermediate node is the straight line connecting described two triangular apex.
In first preferred embodiment provided by the invention: the cross section between any two adjacent described internodes is triangle
In second preferred embodiment provided by the invention: described cross-arm comprises the main material of linear 2 on rear side of the main material of linear on front side of lower plane 1, lower plane, the linear main material 3 of upper flat sided straight, the main material of upper plane upper end triangle 4, the main material of upper plane lower end triangle 5, the main material of lower plane oblique line shape 6, the main material of front oblique line shape 7, the below main material of oblique line shape 8, duckbill hanging wire rod member 9 and the main material 10 of tower body linear;
On front side of described lower plane, on rear side of the main material of linear 1 and described lower plane, the main material of linear 2 carries out bolt connection or welding by the main material 6 of described lower plane oblique line shape, forms cross-arm lower plane;
The linear main material 3 of described upper flat sided straight carries out bolt with the main material of described upper plane upper end triangle 4 and the described upper plane lower end main material 5 of triangle respectively and is connected or welding;
The main material of described front oblique line shape 7 and described oblique line shape main material 8 upper end below meet at a bit carries out bolt with the main material of upper plane and is connected or welding, and lower end is carried out bolt with the main material 2 of linear on rear side of the main material of linear 1 on front side of described lower plane and described lower plane respectively and is connected or welding;
On front side of the main material of described upper plane upper end triangle 4, described lower plane on rear side of the main material of linear 1 and described lower plane the main material of linear 2 respectively material 10 main with described tower body carry out bolt and be connected or welding;
On front side of the main material of described upper plane lower end triangle 5, described lower plane, on rear side of the main material of linear 1 and described lower plane, the main material of linear 2 carries out bolt with described duckbill hanging wire rod member 9 respectively and is connected or welding.
In 3rd preferred embodiment provided by the invention: described cross-arm is sharp nozzle type cross-arm, the upper plane of last internode described is linear, and the lower plane of described cross-arm is triangle.
In 4th preferred embodiment provided by the invention: the cross section between any two adjacent described internodes is triangle.
In 5th preferred embodiment provided by the invention: the internode number of described cross-arm is at least four, on described at least four internodes, the shape of plane comprises quadrangle, triangle and linear.
In 6th preferred embodiment provided by the invention: the internode number of described cross-arm is four, described cross-arm comprises the main material of linear 2 on rear side of the main material of linear on front side of lower plane 1, lower plane, the main material of upper plane upper end quadrangle 14, the linear main material 3 of upper flat sided straight, the main material of upper plane upper end triangle 4, the main material of upper plane lower end triangle 5, the main material of lower plane oblique line shape 6, the main material of front oblique line shape 7, the below main material of oblique line shape 8, duckbill hanging wire rod member 9 and the main material 10 of tower body linear;
Upper plane between described first segment is the main material 14 of described upper plane upper end quadrangle, and the main material of described upper plane upper end quadrangle 14 carries out bolt with the main material 4 of upper plane upper end triangle be positioned between second section and is connected or welding;
The described linear main material 3 of upper flat sided straight being positioned at the 3rd internode carries out bolt with the main material of upper plane upper end triangle 4 be positioned between second section and the main material 5 of upper plane lower end triangle that is positioned at the 4th internode respectively and is connected or welding.
In 7th preferred embodiment provided by the invention: the cross section between two adjacent described internodes is triangle or quadrangle.
The beneficial effect of a kind of electric power pylon cross-arm provided by the invention comprises:
1, a kind of electric power pylon cross-arm provided by the invention, on cross-arm, the linear main material of flat sided straight is connected with the main material of tower body linear and adopts the plane upper end main material of triangle to carry out transition; On cross-arm, the linear main material of flat sided straight is connected with duckbill hanging wire rod member and adopts the plane lower end main material of triangle to carry out transition; Xie Cai upper end, cross-arm positive side meets at and is a bit connected with the main material of plane on cross-arm respectively, takes into full account the loading characteristic of each rod member of cross-arm, and structural configuration is succinctly reasonable, and upper plane avoids layout X-braced panels, reduces cross-arm weight.
2, all rod members with boltsly also can adopt welding; Novel crossarm is applicable to the shaft tower of any materials such as angle steel, steel pipe, the mixing of angle steel steel pipe and composite material; Be applicable to free voltage grade transmission line of electricity.
3, be equally applicable to sharp nozzle type cross-arm, namely duckbill hanging wire rod member 9 length equals zero, and now the upper plane of last internode is linear, and lower plane is triangle.
4, a kind of cross-arm provided by the invention can carry out hybrid-type collocation to the structure of upper plane, considers the situation that quadrangle, triangle, linear all exist, can analyze the concrete condition of electric power pylon, adapts to select different cross-arms.
Accompanying drawing explanation
Fig. 1 is the structural representation of traditional electric power pylon cross-arm provided by the invention;
Fig. 2 is the structural representation of the embodiment one of a kind of electric power pylon cross-arm provided by the invention;
Fig. 3 is the structural representation of the embodiment two of a kind of electric power pylon cross-arm provided by the invention;
Fig. 4 is the structural representation of the embodiment three of a kind of electric power pylon cross-arm provided by the invention;
Fig. 5 is the arrangement figure of the upper plane of traditional electric power pylon cross-arm;
Fig. 6 is the arrangement figure of plane on electric power pylon cross-arm suspension rod interconnection system;
Fig. 7 is the arrangement figure of plane on electric power pylon cross-arm list lattice staggered form;
Fig. 8 is the electric power pylon cross-arm arrangement figure of plane on staggered form end to end;
Fig. 9 is the arrangement figure of plane on electric power pylon cross-arm side double cross V shape;
Figure 10 is the arrangement figure of the upper plane of a kind of electric power pylon cross-arm provided by the invention.
Detailed description of the invention
A kind of electric power pylon cross-arm provided by the invention, for the loading characteristic of iron tower of power transmission line, cross-arm structural configuration is more rationally succinct, can reduce the number of components simultaneously, reduces cross-arm weight.
The main material internode number of cross-arm is greater than 2, namely have between at least one middle node between first internode of cross-arm and last internode, wherein, first is triangle with the upper plane of last internode, the upper plane of intermediate node is the straight line of connection two triangular apex, namely on the junction between two internodes, plane is a point, and lower plane is straight line, and the cross section between any two adjacent segments is a triangle.
Embodiment one:
Be illustrated in figure 2 the structural representation of the embodiment of a kind of electric power pylon cross-arm provided by the invention, the internode number of the cross-arm in embodiment one is 4, and cross-arm comprises the main material of linear 2 on rear side of the main material of linear on front side of lower plane 1, lower plane, the linear main material 3 of upper flat sided straight, the main material of upper plane upper end triangle 4, the main material of upper plane lower end triangle 5, the main material of lower plane oblique line shape 6, the main material of front oblique line shape 7, the below main material of oblique line shape 8, duckbill hanging wire rod member 9 and the main material 10 of tower body linear.
On front side of cross-arm lower plane, on rear side of the main material of linear 1 and lower plane, the main material of linear 2 carries out bolt connection or welding by the main material 6 of lower plane oblique line shape, forms cross-arm lower plane; The linear main material 3 of upper flat sided straight carries out bolt with the main material of upper plane upper end triangle 4 and the main material 5 of upper plane lower end triangle respectively and is connected or welding; The main material of front oblique line shape 7 and below oblique line shape main material 8 upper end meet at a bit carries out bolt with the main material of upper plane and is connected or welding, and lower end is carried out bolt with the main material 2 of linear on rear side of the main material of linear on front side of lower plane 1 and lower plane respectively and is connected or welding; On front side of the main material of upper plane upper end triangle 4, lower plane on rear side of the main material of linear 1 and lower plane the main material of linear 2 respectively material 10 main with tower body carry out bolt and be connected or welding; On front side of the main material of upper plane lower end triangle 5, lower plane, on rear side of the main material of linear 1 and lower plane, the main material 2 of linear carries out bolt with duckbill hanging wire rod member 9 respectively and is connected or welding.
Embodiment two:
A kind of electric power pylon cross-arm provided by the invention is equally applicable to sharp nozzle type cross-arm and duckbill hanging wire rod member 9 length equals zero, the embodiment two of a kind of electric power pylon cross-arm provided by the invention is a kind of sharp nozzle type cross-arm, its structural representation as shown in Figure 3, as shown in Figure 3, on this sharp nozzle type cross-arm, the main material of plane replaces the upper main material of plane lower end triangle to downward-extension, namely going up the linear main material 3 of flat sided straight replaces the upper main material 5 of plane lower end triangle to be connected with lower plane, and lower plane is triangle.
Embodiment three:
The structure of the upper plane of a kind of electric power pylon cross-arm provided by the invention can carry out hybrid-type collocation, consider quadrangle, triangle, the situation that linear all exists, be illustrated in figure 4 the embodiment three of a kind of electric power pylon cross-arm provided by the invention, as shown in Figure 4, the internode number of the cross-arm in embodiment three is 4, cross-arm comprises the main material 1 of linear on front side of lower plane, the main material 2 of linear on rear side of lower plane, the main material 14 of upper plane upper end quadrangle, the linear main material 3 of upper flat sided straight, the main material 4 of upper plane upper end triangle, the main material 5 of upper plane lower end triangle, the main material 6 of lower plane oblique line shape, the main material 7 of front oblique line shape, the main material 8 of oblique line shape below, duckbill hanging wire rod member 9 and the main material 10 of tower body linear.
Upper plane between first segment is the main material 14 of upper plane upper end quadrangle, on this, the main material of plane upper end quadrangle 14 carries out bolt with the main material 4 of upper plane upper end triangle be positioned between second section and is connected or welding, and the linear main material 3 of upper flat sided straight being positioned at the 3rd internode carries out bolt with the main material of upper plane upper end triangle 4 be positioned between second section and the main material 5 of upper plane lower end triangle that is positioned at the 4th internode respectively and is connected or welding.
Internal force analysis is carried out after often needing that in engineering design the pylon of space structures is resolved into plane frame, approximate calculation is carried out to the stressed of different structure cross-arm, but these approximate calculation through practice and the verification experimental verification of many engineerings, can meet the needs of engineering reality substantially.
In the approximate calculation of duckbill cross-arm, general supposition transverse load is born by the main material of cross-arm lower plane, and vertical load is on average shared by front and back two panels truss, and longitudinal tension force can only be born by lower plane, also can be shared by upper and lower plane.
Point nozzle type cross-arm generally supposes that transverse load is born by two main materials of lower plane, and vertical load is born by front and rear panel truss, and longitudinal tension force can have two kinds of hypothesis, and namely longitudinal tension force is born by lower plane completely or shared by rigidity by lower planes.
No matter duckbill cross-arm point or the upper plane of nozzle type cross-arm may not stress or shares longitudinal tension force with lower plane in stressed approximate calculation, considers this mechanical characteristic of cross-arm, reduces the number of components of plane on cross-arm, reduce cross-arm weight.
As Fig. 5 to Figure 10 shows that the different arrangement of cross-arm upper plane structural representation wire cross-arm on the oblique material arrangement of plane.
Figure 5 shows that X-braced panels is arranged into cross-arm root, be connected on the main material of suspension rod of cross-arm, when the hanging point of duckbill hanging wire rod member 9 is by gravity or by longitudinal force effect, load is by the main material of upper plane or tiltedly material transmission.
Fig. 6 and Fig. 7 is respectively suspension rod interconnection system and single lattice staggered form arrangement, in the arrangement of Fig. 6 and Fig. 7, adopts suspension rod interconnection system and single lattice X-braced panels interconnection system, easily causes the integral rigidity of plane on cross-arm to weaken.
Fig. 8 and Fig. 9 is respectively staggered form and side double cross V shape arrangement end to end, and in the arrangement of Fig. 8 and Fig. 9, oblique material does not stress, and utilizes TTA2.0 to carry out computing to Fig. 8 and Fig. 9 two kinds of arrangements, finds the stressed identical of the main material of cross-arm.When the external load that the hanging point of duckbill hanging wire rod member 9 is subject to is larger, reverse sudden change and can occur in the oblique material place not arranging intersection, in the case, oblique material should be arranged in end to end as far as possible; When cross-arm is longer, adopt the arrangement of Fig. 8; Under the effect of longitudinal load, cross-arm lower plane can drive plane to rotate, and in the case, adopts the arrangement of Fig. 9 more suitable.
Figure 10 is layout mode on a kind of crosspiece provided by the invention, considers, in the arrangement of Fig. 6 and Fig. 7, easily to cause the integral rigidity of plane on cross-arm to weaken, the oblique material do not stressed in suitable deletion Fig. 8 Fig. 9, after considering force structure, reduce the number of components, reduce cross-arm weight.The situation that upper plane can also be arranged to consider quadrangle, triangle, linear all exist is to adapt to the electric power pylon of different characteristics.
A kind of electric power pylon cross-arm provided by the invention is applicable to the shaft tower of any materials such as angle steel, steel pipe, the mixing of angle steel steel pipe and composite material; Be applicable to free voltage grade transmission line of electricity.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (4)
1. an electric power pylon cross-arm, have between first internode of described cross-arm and last internode between at least one middle node, it is characterized in that, the upper plane of described first and last internode is triangle, and the upper plane of intermediate node is the straight line connecting described two triangular apex;
Cross section between any two adjacent described internodes is triangle;
Described cross-arm comprises the main material of linear (2) on rear side of the main material of linear on front side of lower plane (1), lower plane, the linear main material of upper flat sided straight (3), the main material of upper plane upper end triangle (4), the main material of upper plane lower end triangle (5), the main material of lower plane oblique line shape (6), the main material of front oblique line shape (7), the below main material of oblique line shape (8), duckbill hanging wire rod member (9) and the main material of tower body linear (10);
On front side of described lower plane, on rear side of the main material of linear (1) and described lower plane, the main material of linear (2) carries out bolt connection or welding by the main material of described lower plane oblique line shape (6), forms cross-arm lower plane;
The linear main material of described upper flat sided straight (3) is carried out bolt with the main material of described upper plane upper end triangle (4) and the main material of described upper plane lower end triangle (5) respectively and is connected or welding;
The main material of described front oblique line shape (7) and the described main material of oblique line shape (8) upper end below meet at a bit carries out bolt with the main material of upper plane and is connected or welding, and lower end is carried out bolt with the main material of linear (2) on rear side of the main material of linear (1) on front side of described lower plane and described lower plane respectively and is connected or welding;
On front side of the main material of described upper plane upper end triangle (4), described lower plane, on rear side of the main material of linear (1) and described lower plane, the main material of linear (2) carries out bolt with the main material of described tower body (10) respectively and is connected or welding;
On front side of the main material of described upper plane lower end triangle (5), described lower plane, on rear side of the main material of linear (1) and described lower plane, the main material of linear (2) carries out bolt with described duckbill hanging wire rod member (9) respectively and is connected or welding.
2. cross-arm as claimed in claim 1, it is characterized in that, the internode number of described cross-arm is at least four, and on described at least four internodes, the shape of plane comprises quadrangle, triangle and linear.
3. cross-arm as claimed in claim 2, it is characterized in that, the internode number of described cross-arm is four, described cross-arm comprises the main material of linear on front side of lower plane (1), the main material of linear (2) on rear side of lower plane, the main material of upper plane upper end quadrangle (14), the linear main material (3) of upper flat sided straight, the main material of upper plane upper end triangle (4), the main material of upper plane lower end triangle (5), the main material of lower plane oblique line shape (6), the main material of front oblique line shape (7), the main material of oblique line shape (8) below, duckbill hanging wire rod member (9) and the main material of tower body linear (10),
Upper plane between described first segment is the main material of described upper plane upper end quadrangle (14), and the main material of described upper plane upper end quadrangle (14) carries out bolt with the main material of the upper plane upper end triangle (4) be positioned between second section and is connected or welding;
The described linear main material of the upper flat sided straight (3) being positioned at the 3rd internode is carried out bolt with the main material of the upper plane upper end triangle (4) be positioned between second section and the main material of the upper plane lower end triangle (5) that is positioned at the 4th internode respectively and is connected or welding.
4. cross-arm as claimed in claim 2, it is characterized in that, the cross section between two adjacent described internodes is triangle or quadrangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326527.4A CN102900260B (en) | 2012-09-05 | 2012-09-05 | Cross arm for transmission towers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326527.4A CN102900260B (en) | 2012-09-05 | 2012-09-05 | Cross arm for transmission towers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102900260A CN102900260A (en) | 2013-01-30 |
| CN102900260B true CN102900260B (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210326527.4A Active CN102900260B (en) | 2012-09-05 | 2012-09-05 | Cross arm for transmission towers |
Country Status (1)
| Country | Link |
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| CN (1) | CN102900260B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111827771A (en) * | 2020-07-24 | 2020-10-27 | 国网河南省电力公司经济技术研究院 | Branch tower for four-loop overhead transmission line |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000184565A (en) * | 1998-12-21 | 2000-06-30 | Chubu Electric Power Co Inc | Triangular steel tower for power transmission |
| CN202249089U (en) * | 2011-10-12 | 2012-05-30 | 河南省电力公司信阳供电公司 | Cross arm for cement pole |
| CN203066582U (en) * | 2012-09-05 | 2013-07-17 | 中国电力科学研究院 | Cross arm for transmission tower |
-
2012
- 2012-09-05 CN CN201210326527.4A patent/CN102900260B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000184565A (en) * | 1998-12-21 | 2000-06-30 | Chubu Electric Power Co Inc | Triangular steel tower for power transmission |
| CN202249089U (en) * | 2011-10-12 | 2012-05-30 | 河南省电力公司信阳供电公司 | Cross arm for cement pole |
| CN203066582U (en) * | 2012-09-05 | 2013-07-17 | 中国电力科学研究院 | Cross arm for transmission tower |
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| Publication number | Publication date |
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| CN102900260A (en) | 2013-01-30 |
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