CN201126095Y - Cold bending angle-bar used for power transmission iron tower manufacturing - Google Patents

Cold bending angle-bar used for power transmission iron tower manufacturing Download PDF

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Publication number
CN201126095Y
CN201126095Y CNU2007200886499U CN200720088649U CN201126095Y CN 201126095 Y CN201126095 Y CN 201126095Y CN U2007200886499 U CNU2007200886499 U CN U2007200886499U CN 200720088649 U CN200720088649 U CN 200720088649U CN 201126095 Y CN201126095 Y CN 201126095Y
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CN
China
Prior art keywords
angle
steel
angle steel
electric power
hot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNU2007200886499U
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Chinese (zh)
Inventor
叶掀亮
万国胜
朱少文
盛珍建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Iron and Steel Group Corp
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Wuhan Iron and Steel Group Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan Iron and Steel Group Corp filed Critical Wuhan Iron and Steel Group Corp
Priority to CNU2007200886499U priority Critical patent/CN201126095Y/en
Application granted granted Critical
Publication of CN201126095Y publication Critical patent/CN201126095Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model provides a cold bending angle steel used for manufacturing a transmission tower. The angle steel presents a strip shape with the cross section thereof including two right-angle sides, characterized in that the angle steel is formed of a steel plate or a metal strip by a cold bend forming method, wherein the corner at the joint of the two right-angle sides is camber angle. The utility model is an economical, efficient and energy-saving rolled product, featured with the characteristics of light weigh, high intensity, stable property, flexible specification and reasonable distribution of the section metal, especially for manufacturing the transmission tower.

Description

Be used for the clod wash angle steel that electric power pylon is made
Technical field
The utility model relates to the power transmission tower section bar, relates in particular to be used for the clod wash angle steel that electric power pylon is made.
Background technique
The power transmission tower of China mainly adopts the hot-rolled angle steel splicing to make at present.Tower height from several meters to hundreds of rice, to several kilotons, material has straight carbon steel, low alloy steel etc. to single tower weight from the hundreds of kilogram.Above-mentioned hot-rolled angle steel as shown in Figure 1, specification limit is: 80 * 80 * 6.0~200 * 200 * 24.0; Material is mainly: Q235, Q345, Q390 etc.Adopt hot-rolled angle steel to make power transmission tower and mainly have following problems:
1) the conventional tower of 10 tons of weights, the angle steel that use different size is kind surplus in the of 20 nearly, and so tissue production of small lot, many kinds of steel mill is purchased not then when running into some product rule, and have to be little with big generation, cause about 5%~10% waste of material.
2) the conventional tower of 10 tons of weights is made up of more than 2000 members usually, and the scale of each member is different in size, and hot-rolled steel section all is the sizing product usually, causes the contradiction of producing and using, and can produce 5% materials consumption.
3) power transmission tower is open-air carrying, because the bight of hot-rolled angle steel is a wedge angle, can increase the wind resistance of body of the tower, so also need consider this factor when body of the tower designs, increases the Intensity Design of body of the tower, thereby has increased the deadweight of tower.
4) hot-rolled angle steel intensity is lower, is difficult to satisfy transmission of electricity bar, tower requirement.
5) limited by hot rolling technology, the hot-rolled angle steel of high-strength corrosion-resisting material is produced difficulty.
Therefore, the shaped steel made electric power pylon of seeking new model, new varieties has become inevitable.
The model utility content
The present utility model is made the deficiency of tower at hot-rolled angle steel, be intended to utilize the sectional dimension of Lightweight Steel Shape and cut lengths to change flexibly, Metal Distribution rational characteristics in cross section propose that a kind of substance is light, intensity is high, can satisfy the clod wash angle steel that electric power pylon is made that is used for of power transmission tower requirement.
For achieving the above object, the utility model adopts following technological scheme: be used for the clod wash angle steel that electric power pylon is made, this angle steel is strip, its cross section comprises two right angle sides, it is characterized in that this angle steel adopts cold bending shaping method to make with steel plate or steel band, the bight of described two right angle side intersections is arc round angles.
In such scheme, any outer end on one side can also be provided with aduncate interior flanging in described two right angle sides, and bight of flanging and right angle side intersection is an arc round angle in this.
In such scheme, the outer end of described two right angle sides can also be provided with aduncate interior flanging simultaneously, and bight of flanging and right angle side intersection is an arc round angle in this.
The angle that flanging and right angle side intersect in above-mentioned is preferably 90 °.
The utility model is the energy-conservation steel of a kind of economical and efficient, it has, and substance is light, intensity is high, stable performance, specification flexibly, the rational characteristics of cross section Metal Distribution, be particularly suitable for making electric power pylon and use.Compare with the described hot-rolled angle steel of background technique, have the following advantages:
1) under the situation of same material, because effect of cold work, the strength of materials of the present utility model increases, and can reduce and make the steel that electric power pylon is used, thereby save steel.
2) according to calculating, the utility model is compared the moment of inertia and the turning radius that hot-rolled angle steel has improved the cross section, compares with the hot-rolled angle steel of same length and support, has reduced the maximum slenderness-ratio of member, thereby has increased the monolithic stability bearing capacity of axial compression member.
3) because the bight of two right angle side intersections of the utility model is arc round angles, can lower the wind resistance of the body of the tower of electric power pylon, thereby reduce the deadweight of electric power pylon.
Description of drawings
Fig. 1 is traditional hot-rolled angle steel cross-sectional view.
Fig. 2 is the utility model cross-sectional view.
Fig. 3 is the utility model cold roll forming roller floral diagram.
Embodiment
Referring to Fig. 2, the utility model is strip, its cross section comprises two right angle sides 2,3, the bight of described two right angle side intersections is arc round angles, outer ends on one side any or both sides also are provided with aduncate interior flanging 1,4 in described two right angle sides 2,3, and the bight of interior flanging 1,4 right angle sides corresponding with it 2,3 intersections is arc round angles.
The utility model adopts cold bending shaping method to make with hot-rolled coil or steel band.Hot-rolled coil or winding steel adopt high-strength hot-rolled anti-corrosion roll bending, and its performance index are respectively σ s 〉=345Mpa; σ b 〉=480Mpa;-40 ℃ of ballistic work AKV 〉=21J; Relative corrosion rate 〉=60% (Q235-A relatively).
The utility model adopts progressively forming method moulding of multi-pass, it is first moulding invagination limit 1 and 4, when the angle between interior flanging 1,4 and the right angle side 2,3 is formed into 90 °, increase and cross curved sortie together, order moulding right angle side 2 and 3 increases when the angle between right angle side 2 and 3 is formed into 90 ° and crosses curved sortie together again.By this order moulding, multi-pass is the method for moulding progressively, occurs empty curved phenomenon in the time of can effectively preventing formed product, to guarantee product stable production smoothly.In forming process, taked respectively to cross for twice and curved type to overcome the resilience of product.The forming roll floral diagram is seen Fig. 3.
Table 1: the Dimensions of present embodiment and section factor
Table 2: the Dimensions of hot-rolled angle steel and section factor
Number b d r cm 2 kg/m m 2/m lx cm 4 Ix cm Wx cm 3 l X0 cm 4 i X0 cm W X0 cm 3 l Y0 cm 4 i Y0 cm W Y0 cm 3 l X1 cm 4 cm
16 160 14 16 43.296 33.987 0.629 1048.36 4.92 90.95 1665.02 6.20 147.17 431.70 3.16 68.24 1914.68 4.47
Contrast table 1 and table 2, can find out: hot-rolled angle steel and the utility model have following advantages under the identical situation of specification:
1) substance alleviates 11.1%;
2) under the situation of same material, because effect of cold work, the strength of materials of clod wash invagination corner angle increases;
3) according to calculating, clod wash invagination corner angle is compared the moment of inertia and the turning radius that hot-rolled angle steel has improved the cross section, compares with the hot-rolled angle steel of same length and support, has reduced the maximum slenderness-ratio of member, thereby has increased the monolithic stability bearing capacity of axial compression member.

Claims (4)

1, be used for the clod wash angle steel that electric power pylon is made, this angle steel is strip, and its cross section comprises two right angle sides, it is characterized in that this angle steel adopts cold bending shaping method to make with steel plate or steel band, and the bight of described two right angle side intersections is arc round angles.
2, the clod wash angle steel that is used for the electric power pylon manufacturing according to claim 1 is characterized in that any outer end on one side also is provided with aduncate interior flanging in described two right angle sides, and bight of flanging and right angle side intersection is an arc round angle in this.
3, the clod wash angle steel that is used for the electric power pylon manufacturing according to claim 1 is characterized in that the outer end of described two right angle sides also is provided with aduncate interior flanging simultaneously, and bight of flanging and right angle side intersection is an arc round angle in this.
4, the clod wash angle steel that is used for the electric power pylon manufacturing according to claim 1 and 2 is characterized in that described interior flanging and right angle side intersect 90 °.
CNU2007200886499U 2007-11-30 2007-11-30 Cold bending angle-bar used for power transmission iron tower manufacturing Expired - Fee Related CN201126095Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007200886499U CN201126095Y (en) 2007-11-30 2007-11-30 Cold bending angle-bar used for power transmission iron tower manufacturing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007200886499U CN201126095Y (en) 2007-11-30 2007-11-30 Cold bending angle-bar used for power transmission iron tower manufacturing

Publications (1)

Publication Number Publication Date
CN201126095Y true CN201126095Y (en) 2008-10-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2007200886499U Expired - Fee Related CN201126095Y (en) 2007-11-30 2007-11-30 Cold bending angle-bar used for power transmission iron tower manufacturing

Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104675176A (en) * 2014-11-28 2015-06-03 浙江盛达铁塔有限公司 Support angle steel and steel tower rest platform
CN104676235A (en) * 2014-11-28 2015-06-03 浙江盛达铁塔有限公司 Support angle steel and production method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104675176A (en) * 2014-11-28 2015-06-03 浙江盛达铁塔有限公司 Support angle steel and steel tower rest platform
CN104676235A (en) * 2014-11-28 2015-06-03 浙江盛达铁塔有限公司 Support angle steel and production method thereof

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Assignee: Hankou Steel Rolling Mill, Wuhan Iron & Steel Group

Assignor: Wuhan Iron & Steel (Group) Corp.

Contract record no.: 2012420000097

Denomination of utility model: Cold bending angle-bar used for power transmission iron tower manufacturing

Granted publication date: 20081001

License type: Exclusive License

Record date: 20120813

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20081001

Termination date: 20161130