CN102900260A - Cross arm for transmission towers - Google Patents
Cross arm for transmission towers Download PDFInfo
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- CN102900260A CN102900260A CN2012103265274A CN201210326527A CN102900260A CN 102900260 A CN102900260 A CN 102900260A CN 2012103265274 A CN2012103265274 A CN 2012103265274A CN 201210326527 A CN201210326527 A CN 201210326527A CN 102900260 A CN102900260 A CN 102900260A
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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 the Transmission Line Design field, be specifically related to a kind of electric power pylon cross-arm.
Background technology
Iron tower of power transmission line cross-arm lower plane master material generally by the stable control of resistance to compression, generally controlled by tensile strength by upper plane master's material.For electric power pylon, tensile strength control is conducive to give full play to the supporting capacity of member, and unstable failure can not occur to stablize tension member.
The tradition iron tower of power transmission line adopts the form of certain thickness right angle trigonometry plated construction always with cross-arm, 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 consists of, parallel to the ground, upper plane is the quadrangle inclined-plane that the limit at the thickness place of hypotenuse and set square consists of, the vertical load of cross-arm hanging point is mainly born on upper plane, and do not bear longitudinal unbalance tension force, therefore connect on the cross-arm between the two main materials in plane tiltedly material need to be in the end or root disconnect, be that end or root are not arranged X-braced panels, this kind arranges that the cross-arm form causes the waste of the oblique material in plane on the 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 for connecting the straight line of described two triangular apex.
In the first preferred embodiment provided by the invention: the cross section between any two adjacent described internodes is triangle
In the second preferred embodiment provided by the invention: described cross-arm comprises lower plane front side linear master material (1), lower plane rear side linear master's material (2), the linear main material of upper flat sided straight (3), upper end, upper plane triangle master's material (4), lower end, upper plane triangle master material (5), lower plane oblique line shape master material (6), front oblique line shape master material (7), back oblique line shape master material (8), duckbill hanging wire rod member (9) and body of the tower linear master material (10);
Described lower plane front side linear master material (1) be connected lower plane rear side linear master's material (2) and undertaken by described lower plane oblique line shape master material (6) that bolt connects or welding, form the cross-arm lower plane;
The linear main material of described upper flat sided straight (3) respectively with described upper plane upper end triangle master's material (4) be connected lower end, upper plane triangle master material (5) and carry out bolt and be connected or weld;
Described front oblique line shape master material (7) be connected back oblique line shape master material (8) upper end and meet at a bit and to carry out bolt with upper plane master's material and be connected or weld, the lower end respectively with described lower plane front side linear master material (1) be connected lower plane rear side linear master's material (2) and carry out bolt and be connected or weld;
Upper end, described upper plane triangle master's material (4), described lower plane front side linear master material (1) and the lower plane rear side linear master's material (2) of being connected carry out bolt with described body of the tower master material (10) respectively and are connected or weld;
Described upper plane lower end triangle master material (5), described lower plane front side linear master material (1) and the lower plane rear side linear master's material (2) of being connected carry out bolt with described duckbill hanging wire rod member (9) respectively and are connected or weld.
In the 3rd preferred embodiment provided by the invention: described cross-arm is sharp mouth type cross-arm, and the upper plane of described last internode is linear, and the lower plane of described cross-arm is triangle.
In the 4th preferred embodiment provided by the invention: the cross section between any two adjacent described internodes is triangle.
In the 5th preferred embodiment provided by the invention: the internode number of described cross-arm is at least four, and the shape on plane comprises quadrangle, triangle and linear on described at least four internodes.
In the 6th preferred embodiment provided by the invention: the internode number of described cross-arm is four, and described cross-arm comprises lower plane front side linear master material (1), lower plane rear side linear master's material (2), upper end, upper plane quadrangle master's material (14), the linear main material of upper flat sided straight (3), upper end, upper plane triangle master's material (4), lower end, upper plane triangle master material (5), lower plane oblique line shape master material (6), front oblique line shape master material (7), back oblique line shape master material (8), duckbill hanging wire rod member (9) and body of the tower linear master material (10);
Upper plane between described first segment is upper end, described upper plane quadrangle master's material (14), and triangle master's material (4) carries out bolt and is connected or welds on described upper plane upper end quadrangle master's material (14) and the upper plane that is positioned between second section;
The described linear main material of upper flat sided straight (3) that is positioned at the 3rd internode carries out bolt with lower end, the upper plane triangle master material (5) that is positioned at the upper plane upper end triangle master's material (4) between second section and is positioned at the 4th internode respectively and is connected or welds.
In the 7th preferred embodiment provided by the invention: the cross section between two adjacent described internodes is triangle or quadrangle.
A kind of electric power pylon provided by the invention comprises with the beneficial effect of cross-arm:
1, a kind of electric power pylon cross-arm provided by the invention, triangle master material carried out transition on the linear main material of flat sided straight was connected the upper plane of employing on the cross-arm with body of the tower linear master material; The linear main material of flat sided straight is connected with duckbill hanging wire rod member and adopts lower end, plane triangle master material to carry out transition on the cross-arm; Oblique material upper end, the positive side of cross-arm meets at a bit and is connected with plane master's material on the cross-arm respectively, takes into full account the loading characteristic of each rod member of cross-arm, and structural configuration is succinctly reasonable, and the layout X-braced panels has been avoided on upper plane, reduces cross-arm weight.
2, all rod members can with boltsly also can adopt welding; Novel crossarm is applicable to the arbitrarily shaft tower of material 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 mouth type cross-arm, namely duckbill hanging wire rod member 9 length equal zero, and this moment, the upper plane of last internode was 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 on upper plane, considers the situation that quadrangle, triangle, linear all exist, and can analyze the concrete condition of electric power pylon, adapts to select different cross-arms.
Description of drawings
Fig. 1 is the structural representation that traditional electric power pylon provided by the invention is used cross-arm;
Fig. 2 is the structural representation that a kind of electric power pylon provided by the invention is used the embodiment one of cross-arm;
Fig. 3 is the structural representation that a kind of electric power pylon provided by the invention is used the embodiment two of cross-arm;
Fig. 4 is the structural representation that a kind of electric power pylon provided by the invention is used the embodiment three of cross-arm;
Fig. 5 is the arrangement figure that traditional electric power pylon is used the upper plane of cross-arm;
Fig. 6 is the arrangement figure that electric power pylon is used plane on the cross-arm suspension rod interconnection system;
Fig. 7 is electric power pylon with the arrangement figure on plane on the cross-arm list lattice staggered form;
Fig. 8 is electric power pylon with the cross-arm arrangement figure on plane on the staggered form end to end;
Fig. 9 is the arrangement figure that electric power pylon is used plane on the cross-arm one side double cross V shape;
Figure 10 is the arrangement figure that a kind of electric power pylon provided by the invention is used the upper plane of cross-arm.
The specific embodiment
A kind of electric power pylon cross-arm provided by the invention, for the loading characteristic of iron tower of power transmission line, the 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, be to have between at least one middle node between first internode of cross-arm and last internode, wherein, the upper plane of first and last internode is triangle, the upper plane of intermediate node is for connecting the straight line of two triangular apex, namely the plane is a point on the junction between two internodes, and lower plane is straight line, and the cross section between between any two adjacent segments is a triangle.
Embodiment one:
Be illustrated in figure 2 as a kind of electric power pylon provided by the invention structural representation of the embodiment of cross-arm, the internode number of the cross-arm among the embodiment one is 4, and cross-arm comprises lower plane front side linear master material 1, lower plane rear side linear master material 2, the linear main material 3 of upper flat sided straight, upper end, upper plane triangle master material 4, lower end, upper plane triangle master material 5, lower plane oblique line shape master material 6, front oblique line shape master material 7, back oblique line shape master material 8, duckbill hanging wire rod member 9 and body of the tower linear master material 10.
Cross-arm lower plane front side linear master material 1 is connected with lower plane rear side linear master material and is undertaken by lower plane oblique line shape master material 6 that bolt connects or welding, forms the cross-arm lower plane; The linear main material 3 of upper flat sided straight carries out bolt with upper plane upper end triangle master's material 4 and lower end, upper plane triangle master material 5 respectively and is connected or welds; Front oblique line shape master material 7 is connected the upper end and is met at a bit and to carry out bolt with upper plane master's material and be connected or weld with back oblique line shape master material, are connected with lower plane rear side linear master material with lower plane front side linear master material 1 respectively and carry out bolt and be connected or weld in the lower end; Upper end, upper plane triangle master material 4, lower plane front side linear master material 1 and lower plane rear side linear master material 2 carry out bolt with body of the tower master material 10 respectively and are connected or weld; Lower end, upper plane triangle master material 5, lower plane front side linear master material 1 and lower plane rear side linear master material 2 carry out bolt with duckbill hanging wire rod member 9 respectively and are connected or weld.
Embodiment two:
It is that duckbill hanging wire rod member 9 length equal zero that a kind of electric power pylon provided by the invention is equally applicable to sharp mouth type cross-arm with cross-arm, a kind of electric power pylon provided by the invention is a kind of sharp mouth type cross-arm with the embodiment two of cross-arm, its structural representation as shown in Figure 3, as shown in Figure 3, plane master's material replaces upper lower end, plane triangle master material to downward-extension on this point mouth type cross-arm, namely go up the linear main material 3 of flat sided straight and replace upper lower end, plane triangle master material 5 to be connected with lower plane, lower plane is triangle.
Embodiment three:
A kind of electric power pylon provided by the invention can carry out hybrid-type collocation with the structure on the upper plane of cross-arm, consider quadrangle, triangle, the situation that linear all exists, be illustrated in figure 4 as a kind of electric power pylon provided by the invention embodiment three of cross-arm, as shown in Figure 4, the internode number of the cross-arm among the embodiment three is 4, and cross-arm comprises lower plane front side linear master material 1, lower plane rear side linear master material 2, upper end, upper plane quadrangle master material 14, the linear main material 3 of upper flat sided straight, upper end, upper plane triangle master material 4, lower end, upper plane triangle master material 5, lower plane oblique line shape master material 6, front oblique line shape master material 7, back oblique line shape master material 8, duckbill hanging wire rod member 9 and body of the tower linear master material 10.
Upper plane between first segment is upper end, upper plane quadrangle master material 14, should upper end, upper plane quadrangle master material 14 be positioned at upper end, upper plane triangle master material 4 between second section and carry out bolt and be connected or weld, the linear main material 3 of upper flat sided straight that is positioned at the 3rd internode respectively with the upper plane that is positioned between second section on triangle master material 4 and lower end, the upper plane triangle master material 5 that is positioned at the 4th internode carry out bolt and be connected or weld.
Carry out internal force analysis after in engineering design, often the pylon of space structures need to being resolved into plane frame, different structure cross-arm stressed carried out approximate calculation, but practice and the verification experimental verification of many engineerings have been passed through in these approximate calculation, basically can satisfy the needs of engineering reality.
General supposition transverse load is born by cross-arm lower plane master material in the approximate calculation of duckbill cross-arm, and vertical load is on average shared by two truss in front and back, and longitudinal tension force can only be born by lower plane, also can be shared by upper and lower plane.
Point mouth type cross-arm supposes that generally transverse load is born by two main materials of lower plane, and vertical load is born by front and back sheet truss, and longitudinal tension force can have two kinds of hypothesis, and namely longitudinal tension force is born by lower plane fully or shared by rigidity by upper lower plane.
No matter duckbill cross-arm point or the upper plane of mouth type cross-arm may not stress in stressed approximate calculation or share longitudinal tension force with lower plane, consider this mechanical characteristic of cross-arm, reduce the number of components on plane on the cross-arm, reduce cross-arm weight.
Such as Fig. 5 oblique material arrangement in plane to the structural representation wire cross-arm on the upper plane that Figure 10 shows that the different arrangements of cross-arm.
Figure 5 shows that X-braced panels is arranged into the cross-arm root, be connected on the suspension rod master material of cross-arm that when the hanging point of duckbill hanging wire rod member 9 is subjected to gravity or is subjected to longitudinal force to do the time spent, load is by main material or the tiltedly material transmission on upper plane.
Fig. 6 and Fig. 7 are respectively suspension rod interconnection system and single lattice staggered form arrangement, in the arrangement of Fig. 6 and Fig. 7, adopt suspension rod interconnection system and single lattice X-braced panels interconnection system, cause easily that the integral rigidity on plane weakens on the cross-arm.
Fig. 8 and Fig. 9 are respectively end to end staggered form and a side double cross V shape arrangement, and oblique material does not stress in the arrangement of Fig. 8 and Fig. 9, utilizes TTA2.0 that Fig. 8 and two kinds of arrangements of Fig. 9 are carried out computing, find the stressed identical of cross-arm master material.When the external load that is subject to when the hanging point of duckbill hanging wire rod member 9 is larger, reverses sudden change and can occur in and do not arrange the oblique material place that intersects, in the case, tiltedly material should be arranged in end to end as far as possible; Longer when cross-arm, adopt the arrangement of Fig. 8; Under the effect of longitudinal load, the cross-arm lower plane can drive the plane and 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, causes easily that the integral rigidity on plane weakens on the cross-arm, suitably delete the oblique material that does not stress among Fig. 8 Fig. 9, after considering force structure, reduce the number of components, reduce cross-arm weight.Upper plane can also be arranged to consider that situation that quadrangle, triangle, linear all exist is to adapt to the electric power pylon of different characteristics.
A kind of electric power pylon provided by the invention is applicable to the arbitrarily shaft tower of material such as angle steel, steel pipe, the mixing of angle steel steel pipe and composite material with cross-arm; Be applicable to free voltage grade transmission line of electricity.
Should be noted that at last: 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 the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. electric power pylon cross-arm, have between at least one middle node between first internode of described cross-arm and last internode, it is characterized in that the upper plane of described first and last internode is triangle, the upper plane of intermediate node is for connecting the straight line of described two triangular apex.
2. cross-arm as claimed in claim 1 is characterized in that, the cross section between any two adjacent described internodes is triangle.
3. cross-arm as claimed in claim 1, it is characterized in that described cross-arm comprises lower plane front side linear master material (1), lower plane rear side linear master's material (2), the linear main material of upper flat sided straight (3), upper end, upper plane triangle master's material (4), lower end, upper plane triangle master material (5), lower plane oblique line shape master material (6), front oblique line shape master material (7), back oblique line shape master material (8), duckbill hanging wire rod member (9) and body of the tower linear master material (10);
Described lower plane front side linear master material (1) be connected lower plane rear side linear master's material (2) and undertaken by described lower plane oblique line shape master material (6) that bolt connects or welding, form the cross-arm lower plane;
The linear main material of described upper flat sided straight (3) respectively with described upper plane upper end triangle master's material (4) be connected lower end, upper plane triangle master material (5) and carry out bolt and be connected or weld;
Described front oblique line shape master material (7) be connected back oblique line shape master material (8) upper end and meet at a bit and to carry out bolt with upper plane master's material and be connected or weld, the lower end respectively with described lower plane front side linear master material (1) be connected lower plane rear side linear master's material (2) and carry out bolt and be connected or weld;
Upper end, described upper plane triangle master's material (4), described lower plane front side linear master material (1) and the lower plane rear side linear master's material (2) of being connected carry out bolt with described body of the tower master material (10) respectively and are connected or weld;
Described upper plane lower end triangle master material (5), described lower plane front side linear master material (1) and the lower plane rear side linear master's material (2) of being connected carry out bolt with described duckbill hanging wire rod member (9) respectively and are connected or weld.
4. cross-arm as claimed in claim 1 is characterized in that, described cross-arm is sharp mouth type cross-arm, and the upper plane of described last internode is linear, and the lower plane of described cross-arm is triangle.
5. cross-arm as claimed in claim 4 is characterized in that, the cross section between any two adjacent described internodes is triangle.
6. cross-arm as claimed in claim 1 is characterized in that, the internode number of described cross-arm is at least four, and the shape on plane comprises quadrangle, triangle and linear on described at least four internodes.
7. cross-arm as claimed in claim 6, it is characterized in that, the internode number of described cross-arm is four, and described cross-arm comprises lower plane front side linear master material (1), lower plane rear side linear master's material (2), upper end, upper plane quadrangle master's material (14), the linear main material of upper flat sided straight (3), upper end, upper plane triangle master's material (4), lower end, upper plane triangle master material (5), lower plane oblique line shape master material (6), front oblique line shape master material (7), back oblique line shape master material (8), duckbill hanging wire rod member (9) and body of the tower linear master material (10);
Upper plane between described first segment is upper end, described upper plane quadrangle master's material (14), and triangle master's material (4) carries out bolt and is connected or welds on described upper plane upper end quadrangle master's material (14) and the upper plane that is positioned between second section;
The described linear main material of upper flat sided straight (3) that is positioned at the 3rd internode carries out bolt with lower end, the upper plane triangle master material (5) that is positioned at the upper plane upper end triangle master's material (4) between second section and is positioned at the 4th internode respectively and is connected or welds.
8. cross-arm as claimed in claim 6 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 true CN102900260A (en) | 2013-01-30 |
| CN102900260B 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 |
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| Country | Link |
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| CN (1) | CN102900260B (en) |
Cited By (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 |
Cited By (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 |
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| Publication number | Publication date |
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| CN102900260B (en) | 2015-05-13 |
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