Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Angle steel

A technology of angle steel and outer arc, applied in towers, joists, girders, etc., can solve the problems of stress concentration of cross-connected plates, great influence of angle steel stiffness, and reduction of angle steel cross-sectional characteristics, so as to improve the strength of rolls and reduce grinding. The effect of reducing the workload and reducing the construction cost

Inactive Publication Date: 2012-12-19
STATE GRID CORP OF CHINA +2
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, iron tower processing manufacturers must invest a lot of manpower to polish the welding seam and the small arc at the corner, which not only wastes manpower and polishing sheets, but also causes serious stress concentration on the cross connecting plate
[0004] Chinese patent CN99209749.5 discloses a kind of angle steel, the intersection of two limbs of described angle steel is circular arc shape, and the radius of outer circular arc is the sum of the radius of inner circular arc and angle steel thickness; Although the angle steel of this kind of structure can solve the above-mentioned problem, but this structure has a great influence on the stiffness of the angle steel, which will reduce the section characteristics of the angle steel, and the influence ratio on the cross-sectional area of ​​the angle steel can reach 3.74%, and the influence ratio on the angle steel inertia radius can reach 4.14%

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Angle steel
  • Angle steel
  • Angle steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This example figure 1 shown. In the present embodiment, the outer arc A is tangent to the outer sides of the two limbs, and the radius R of the outer arc A is 5mm. According to formula 1, the point of intersection between the vertex of the outer arc A and the extension line of the outer sides of the two limbs is The distance h between them is 2mm.

[0025] The L100 angle steel produced by using the above parameters has an influence ratio of 0.42% on the cross-sectional area of ​​the angle steel, and an influence ratio of 0.49% on the radius of inertia.

Embodiment 2

[0027] This example figure 2 shown. In this embodiment, the outer arc B intersects the outer sides of the two limbs, and the radius R of the outer arc B is 12.5 mm. The distance h between them is 5mm.

[0028] The L220 angle steel produced by using the above parameters has an influence ratio of 0.46% on the cross-sectional area of ​​the angle steel, and an influence ratio of 0.57% on the radius of inertia.

Embodiment 3

[0030] This example image 3 shown. In this embodiment, the two ends of the outer arc C and the two limbs are respectively tangent to the outer sides of the two limbs through two sections of arc D1D2 and arc D3D4, and the radius R of the outer arc C is 15mm. According to formula 1, The distance h between the vertex of the outer arc C and the intersection of the extension lines of the lateral sides of the two limbs is 6 mm.

[0031] The L250 angle steel produced by using the above parameters has an influence ratio of 0.51% on the cross-sectional area of ​​the angle steel, and an influence ratio of 0.59% on the radius of inertia.

[0032] Certainly, the outer circular arc of the present invention can be connected with the outer sides of the two limbs in any form of transition, and the distance h between the apex of the outer circular arc and the intersection of the extension lines of the outer sides of the two limbs can also be 2 mm to 6 mm. Any value in between; the angle ste...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to angle steel, which comprises two vertically intersected limbs, wherein the intersected part of the two limbs is in a circular arc shape, the radius of an outer circular arc is R, and the distance h between the top point of the outer circular arc and the crossed point of the outer side edge extension lines of the two limbs meets the formula shown as the accompanying drawing. Through the application of the angle steel, when the angle steel is bundled and packed, the contact part of adjacent upper and lower angle steel is changed from the line contact into the circular arc surface contact, a zinc coating slayer of the angle steel cannot be damaged, a better protection effect is realized on the zinc coating slayer of the angle steel, in addition, the hard friction with a hoisting rope can be avoided during hoisting, and the occurrence of tying marks at the outer side of the angle steel is avoided.

Description

technical field [0001] The invention relates to a building material, in particular to an angle steel. Background technique [0002] Angle steel is a relatively commonly used building material. The cross-sectional shape of angle steel is mainly rectangular, which refers to the long strip of steel that is perpendicular to each other and forms a right angle. It is mainly used in the construction of metal components, factory buildings, and transmission line towers or communication towers. etc. In use, it is required to have better weldability, plastic deformation performance and certain mechanical strength. At present, most of the outer layers of angle steel sold on the market need to be galvanized and anti-corrosion treated; structurally, the two limbs of the angle steel are vertical, the outside of the intersection of the two limbs is a right angle, and the inside is provided with a transition arc. Before transportation, it needs to be bundled and packaged. When the angle ste...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E04C3/06E04H12/08
Inventor 董桂西
Owner STATE GRID CORP OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com