Design, structure design and lighting design of color ball type high pole lights
Abstract: The article focuses on the SLGS-30QC/4m color sphere High pole light has a more comprehensive introduction to the design, the structure of the shaft and the lighting design.
1, Foreword
Lighting needs to solve two problems: lighting, beautification. Lighting is the quality of lighting, such as: color rendering of the light source, light distribution of the luminaire, brightness and illuminance distribution, uniformity and glare
light control level, etc. Beautification is the lighting effect, involving architectural aesthetics, colorimetry, visual psychology, advertising, and so on. People require lighting products to beautify the environment while lighting the environment. When we use various new materials and new techniques to improve the energy-saving effect of lighting products and advocate the world's green lighting, we must also seek new art forms. Express the decorative art of lighting products. China's lighting products have to go global, especially in Europe, where the artistic atmosphere is strong. It is imperative to pay attention to and study the design of lighting products. High pole lights have been widely welcomed by people for their unique advantages of energy saving, convenient maintenance and concentrated lighting, especially in large-area lighting places such as road interchanges, plazas, ports, airports, etc. High pole lighting also shows other lighting methods. Unparalleled advantages.
2 Design
The dimensions of the SLGS-30QC/4m color spherical high pole lamp are as follows: the height of the rod body is 30m, the diameter of the rod top is Υ350mm, the diameter of the rod bottom is Υ710mm, and the wall thickness is three. They are 6mm, 8mm and 10mm respectively. After the whole body of the rod is treated by hot dip galvanizing, it is outsourced with 8K/1.0mm mirror stainless steel. The spherical lamp grid is made of aluminum alloy bar assembly. All bars, mandrels and connecting nuts are made of stainless steel to ensure the overall strength and anti-corrosion requirements of the lamp, and the weight of the lamp is compared with the ordinary high-lamp lamp. There has been a significant decline. The upper hemisphere grid is lined with color translucent special FRP, the light transmittance is 0.364, and the light source is configured as: the upper hemisphere 6 × ZJD250W metal halide lamp, which makes the upper hemisphere bright and has the flooding effect of colored balls. The lower hemisphere adopts 9×NG1000W, 6×NG1000W or 9×NG600W high-pressure sodium lamps, which can meet the lighting needs of the ground 55 × 55m2. The lighting design and light distribution are described later.
The design of this product shows several characteristics:
2.1 The appearance of the grid design is taken from the latitude and longitude of the earth, meaning profound, and the grid structure greatly improved the high pole. The glare of the lamp.
2.2 The effect of the traditional floodlights in the upper hemisphere absorbs the aura of traditional Chinese lantern art, and it is fascinating with the surface of the mirrored stainless steel rod, which is full of splendid celebrations.
Festival The atmosphere and the landscape are very decorative, and are called “Sanle Ming Ball” by the industry peers!
2.3 All the lamps and control appliances are installed in the lower hemisphere, and the lower hemisphere can be lowered to the ground for maintenance, upper and lower hemispheres. The golden yellow "Chinese dragon" base color ring plate cleverly connects the two hemispheres into one.
2.4 Using our patented technology (independent rebound hook and automatic positioning device, GS-1/30m elevator with multiple safety mechanisms), completely eliminates the hooks in ordinary high pole lights. Locking, unsatisfactory phenomenon such as slippery skiing, high pole light operation and maintenance is very convenient and safe.
2.5 The electrical compartment at the bottom of the pole is equipped with a midnight light and an all-night light grouping automatic time switch, which makes the high pole lamp energy-saving and economical; the top of the spherical lamp panel is equipped with a 5m high lightning rod and
Imported solar aviation obstacle lights to meet the requirements of lightning protection grounding and aviation control regulations for high pole lights.
3 Strength design of the rod body
3.1 Calculate the wind load ω0 acting on the pole according to the shape parameters of the previous high pole lamp: ω=βz μs μz μr ω0 (1) where: ω: load load kN/m2 acting on the unit area of the high pole lamp structure; ω0: basic wind pressure, kN/m2; μs: wind load shape coefficient; μz: height variation coefficient at the height of Z ;μr : attach importance to the adjustment coefficient, generally take 1.1; βz : Z wind vibration coefficient; ambient wind speed take V = 42m / s, then ω0 = V2 / 1600 = 1.1025kN / m
Ω0 d2 =1 .1025[ (0 .71 +0 .35)/2]2=0 .31 >0.05 so μs is 0.9; the high-column wind-induced vibration coefficient βz is calculated by the following formula:
< p="">βz =1 +ζ ε1 +ε2 (2) where: ζ: pulsation increase coefficient; ε1: influence coefficient of wind pressure pulsation and wind pressure height change; ε2: vibration mode, structural shape influence coefficient;ζ is related to ω0 T1; T1: self-oscillation period of the lamp post: T1 = 3.63√H/(E I) (m +0 .236ρ A H) (3) where: H: Height of the pole;
A: cross-sectional area of the pole;
I: moment of inertia m4 of the cross-section; m: weight of the pole of height H; kg: lamp Rod density kg/m3; E: modulus of elasticity Pa: for steel E generally takes 2.1 × 104MPa ; ρ take 785kg / m3. I =0 .05(D4 -d4)=0 .001372A =π/4(D2-d2)=0 .02199 is obtained by equation (3): T1=4 .17s according to ω0 T21 =19 .17 , check The table can be obtained: ζ=3 .89.ε1 takes 0.77 (now according to the C type ground), ε2 according to the relative height
h/H=1, the top diameter / the bottom diameter = 0 .35/0 .71 =0 .49 , the table can be seen that ε2 =0.88, so ε1 and ε2 and corresponding β at different heights can be calculated by equation (2); β5 =1.216, β10=1.691, ε15 =2.67 , β20=2.756, β30 =3.533 Height variation coefficient μz According to the B-type soil table, the wind load ω at different heights can be calculated according to formula (1). See Table 1:
Wind F of each segment:
< p="">F30 =ω30 ×(4 .1 +7 .853)=65 .5kNF20 =ω20 ×2 .53 =ω20×2 .53 =9 .5kN
F15 =ω15 ×2 .83 =7 .98kN
F10 =ω10 ×3 .1 =5 .72kN
F5 =ω5 ×3 .4 =3 .6kN
F total=F30+F20 +F15 +F10+F5 =98kN
Bending moment M :
M30 =F30 ×25 =1638kN m
M20 =F20 ×17 .5 =166kN m
M15 =F15 ×12 .5 =100kN m
M10 =F10 ×7 .5 =43kN m
M5 =F5 ×2 .5 =9kN m
M Department=M30 +M20 +M15 +M10 +M5=1956kN m
3.2 Calculate the shear at the bottom of the pole
στ1στ1=2F total/A (4)
In the formula: F total: total wind force on the lamp and light pole;
A: cross-sectional area at the bottom of the pole;
safety factor A
A =π/4(D2 -d2)=0 .02199m2 Calculated by equation (4) στ=2 ×98/0 .02199=8 .91MPa;
Check the table to know A3 The allowable shear stress of steel is 85 MPa, and it is clear that the shear stress is less than the allowable stress.
3.3 Calculating seismic strength
Structural shear force at the bottom of the pole Q0:Q0 =C α1 ω (5)
In the formula: C: Structural influence The coefficient, the steel structure takes 0.35; α1: the value of the seismic influence coefficient α corresponding to the basic natural vibration period T1 of the structure; for the second type of field, α1=0.3 ×0.45/4 when the earthquake is resistant to the magnitude 8. 17 =0. 3237 high pole light load ω includes: lamp, light pole, snow load, wind load, live load parts, generally take 1500kg, 4139kg, 100kg, 2450kg, 200kg. Then ω is 8389kg calculated by equation (5), Q0=0 .35 ×0 .03237 ×8389 =95kg
3.4 Calculating seismic shear stress:
Shear at the bottom of the pole Shear stress στ2στ2 =3Q0/A =0 .1296MPa Comprehensive shear force στ=στ1+στ2 =8 .91 +0 .1296 =9 .04MPa The comprehensive shear force στ is less than the allowable stress of the lamp post of 85MPa, so the pole is safe.
4 Lighting Design
The upper hemisphere uses 6 × ZJD250W metal halide lamps for floodlighting to show the night hemisphere color floodlighting effect; the lower hemisphere's light source configuration is for the ground Lighting, the design provides a 9 × NG1000W light source configuration, the luminaire uses 650 - LRX - TD1000W floodlights.
5 Market application prospects and prospects
Sanle color spherical high pole lamps are the concentrated representatives of China's decorative high pole lamps, because their appearance contains Chinese traditional cultural connotations, the use of functions It also adopts advanced high-bar lighting technology from all over the world. Therefore, once the product is launched, it has been welcomed by highway and municipal engineering owners. This product has been used in Dongfangfang Bailanghe Square, Taizhou Development Zone, Hubei Huangshi Lakeside West Road Plaza, Shaanxi. The use of lighting projects such as Xianyang Railway Station Square and Yingkou Civic Square in Liaoning not only makes the venue bright, but also is a beautiful landscape and a landmark landscape. We believe that the Sanle brand color spherical high pole lamp series will play an increasingly important role in the process of lighting and beautifying Chinese cities.
