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低频段椭圆螺旋风管的隔声量测试

来源:/添加时间:2018-03-13 11:24:29
螺旋风管的空气流动性好,有效通流面积大,系统压降小,日常运行系统耗电量少。同时由于螺旋风管采用螺旋状咬口,因此相比同等规格的铁皮风管,其强度要高。
The air flow of the spiral wind pipe is good, the effective flow area is large, the pressure drop of the system is small, and the power consumption of the daily operation system is less. At the same time, the spiral duct uses a spiral bite, so the strength of the iron pipe is higher than that of the same size.
有研究表明,同样采用D200,厚度为26#钢板制作的对缝管与螺旋管,由于螺旋管的刚度高于对缝管,其低频段比后者低3~10dB,中高频段低12~20 dB。在相近风管截面、风管材料厚度相同的前提下,在低频段椭圆螺旋风管的隔声量优于矩形风管10dB左右。
Studies have shown that using the same D200, thickness of 26# steel butt pipe and spiral tube, the spiral pipe stiffness is higher than that on the tube, the frequency of 3~10dB was lower than that of the latter, in low frequency 12~20 dB. On the premise of the same section of the wind pipe and the same thickness of the pipe material, the sound insulation of the elliptical spiral duct in the low frequency section is better than that of the rectangular duct 10dB.
(1) 手持式电动工具的负荷线必须采用耐磨型橡皮护套铜芯软电缆,并且中间不得有接头。
(1) a hand-held electric tool load line must use wear resistant rubber sheathed copper cable, and no interte joint.
济南厨房排烟管道
(2) 电动工具的外壳、手柄、负荷线、插头、开关等必须完好无损,使用前必须作空载试运转。
(2) the shell, handle, load line, plug and switch of the electric tool must be intact. The test operation must be carried out before use.
(3)施工配合阶段预留孔洞应采用护板堵好,避免失足或坠物伤人。
(3) the guard plate should be used to prevent the loss of foot or the falling objects.
(4)管道井施工前,要检查头上和脚下临时防护措施,避免高出坠落物伤人
(4) before the construction of the pipe well, check the temporary protective measures on the head and foot to avoid the high falling objects.
(5)在孔洞清理过程中,应在孔洞清理部位的下部设置警戒线,并安排专人进行看护,防止坠物伤人。。
(5) in the process of hole cleaning, a warning line should be set at the lower part of the hole cleaning part, and a special person should be arranged to guard against the falling objects.
(6)使用电焊、气焊及明火时,必须按现场管理人员的规定办理动火申请,明火应远离易燃物,并在现场备足灭火器材,且做好必要防护,设专职监护人。
(6) the use of welding, gas welding and flame, must go through fire application according to the provisions of the on-site management, the fire should be far away from flammable materials and fire fighting equipment at the scene and make the necessary protection, Beizu, full-time guardian.
(7)高处作业时,梯子应经常检查是否牢固。梯顶端应固着在建筑物上,底脚应设防滑段,或者下边应有专人扶梯。
(7) when the operation is high, the ladder should always check whether it is firm. Should be fixed on the building top ladder, the foot should be non slip, or under special escalator.
本文的精彩内容来自济南厨房排烟管道详细内容请点击我们的官方网站: /谢谢您的到来!
The wonderful content of this article comes from the detailed content of the Ji'nan kitchen exhaust pipe. Please click on our official website: / thank you for your arrival.

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