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无缝高效传热镀锌钢管特点介绍

来源:http://www.jnxxjm.com

【 发布于:2018-09-10 18:40:55 】


济南镀锌管厂家为您介绍:热镀锌钢管其管内的螺纹表面积偏小,现有的传热管内螺纹为等高齿内螺纹和高低齿内螺纹。加至受结构形状的限制,当在管内进行液、汽两相物态转换时,层流面直接影响到热交换效率及其稳定性。如蒸发传热管的工作是制冷剂液体,由于不断吸收周围的热量而汽化,从而达到制冷之目的计算其制冷量式为Q=K*F*ΔT式中Q为传热量,K为总传热系数,F为总传热面积,ΔT为传热对数温差)从计算公式显示,制冷量主要受制于材质特性、管内结构形式以及内表面积。当传热管的材质特性一定、传热系数不变时,制冷的关键限于内表面积的加大,以及其必须符合流体力学中减少层流,增加紊流,增加蒸发、汽化核心的结构形式,而目前的传热管尚不十分完好。

Jinan galvanized pipe manufacturer for you to introduce: hot-dip galvanized steel pipe, the surface area of the threads in the tube is small, the existing heat transfer pipe threads are contour tooth internal thread and high and low tooth internal thread. Limited by the structure shape, the laminar surface directly affects the heat exchange efficiency and its stability when the liquid-vapor two-phase state transition is carried out in the tube. For example, the work of evaporative heat transfer tube is refrigerant liquid, which vaporizes because of the constant absorption of surrounding heat, so as to achieve the purpose of refrigeration, the refrigeration capacity formula is Q = K * F * T for heat transfer, K for total heat transfer coefficient, F for total heat transfer area, T for logarithmic temperature difference. Quality characteristics, tube structure and inner surface area. When the material characteristics of the heat transfer tube are certain and the heat transfer coefficient is constant, the key of refrigeration is limited to the increase of the inner surface area, and it must accord with the structure of reducing laminar flow, increasing turbulence, increasing evaporation and vaporization core in fluid mechanics.

同时,由于现有无缝内螺纹管的加工方式特性,必然在内螺纹齿根部形成应力集中,致使在后续弯、胀过程中,易释放应力而产生开裂,或出现不当的变形,这一问题在内螺纹管的使用中经常遇到发明内容本实用新型的旨意是采用改变传热管的内螺纹齿的结构形式,设制合理的型面及至流体传导,以获取高效率的热交换。

20171214929786.jpg

At the same time, due to the characteristics of the existing seamless inner thread pipe processing methods, it is inevitable that stress concentration will be formed at the root of the inner thread tooth, which will easily release stress and cause cracking or improper deformation during the subsequent bending and expansion process. The purpose of the utility model is often encountered in the use of the inner thread pipe. By changing the structure of the internal thread tooth of the heat transfer tube, the reasonable profile and the fluid conduction are set up to obtain high efficient heat exchange.

发明的内容是一种瘦形齿内螺纹无缝镀锌钢管高效传热管,其传热管内表面上制有螺纹齿形,其特征在于传热管的内表面上,制有多条带有螺旋角梯形边的齿肋,齿形横截面是由上、下两梯形12构成,即虚拟一上梯形1下底长为下梯形2上底长,两梯形边结合处为棱角,以其两梯形边相连构成瘦齿的形状结构,上梯形1为等腰梯形或不等腰梯形;齿肋的根部是紧密结合于管壁,上梯形1顶角即瘦形齿的齿顶,圆滑转接而成为一整体的瘦形齿内螺纹镀锌钢管;而瘦形齿的上梯形1梯边,也可加工成横截面是契形;管形齿的下梯形2底边内角较小,其底边角Γ=45120°,两底边角Γ可为相等或不等,瘦形齿的螺纹是左旋或右旋,其高度可为相等或不等。齿距可为相等或不等,螺纹管齿的螺旋线与母管轴线夹角,即螺旋角Β=040°,瘦形齿高Hf=0.180.30mm螺旋线条数N=3070其中瘦形齿之下梯形2上顶角度Α2=4090°,

The content of the invention is a thin-tooth seamless galvanized steel pipe with internal thread for high-efficiency heat transfer. The surface of the heat transfer pipe is provided with a thread-tooth shape, which is characterized by a plurality of teeth ribs with spiral angle trapezoidal edges on the inner surface of the heat transfer pipe. The cross-section of the teeth is composed of two trapezoidal shapes, i.e. a virtual trapezoidal shape with an upper trapezoidal shape and a lower bottom length. The lower trapezoidal 2 is long at the top and bottom, and the two trapezoidal edges are angular at the junction. The upper trapezoidal 1 is isosceles trapezoidal or isosceles trapezoidal. The root of the tooth rib is tightly connected to the tube wall, and the top of the upper trapezoidal 1 is the top of the thin tooth, which is a slippery turning to form a whole thin tooth with internal thread galvanized steel. The upper trapezoidal 1 trapezoidal edge of the thin tooth can also be machined into a cross-sectional coincidence; the lower trapezoidal 2 bottom edge of the tube tooth has a smaller inner angle, the bottom edge angle =45120 degrees, the two bottom edge angles can be equal or unequal, the screw thread of the thin tooth can be left-handed or right-handed, and its height can be equal or unequal. The pitch can be equal or unequal. The angle between the helix of the threaded pipe teeth and the axis of the master pipe, i.e. the helix angle_=040 and the number of helix lines with the height of the thin tooth Hf=0.180.30mm N=3070, in which the angle 2=4090 under the thin tooth is trapezoidal.

下梯形2为等腰梯形或不等腰梯形,其梯边长或同一侧边长C=0.030.08mm上梯形1顶角,即为瘦形齿的顶角Α1=1230°。本实用新型的齿形瘦、齿高较大,管齿形的螺旋线与母管轴线夹角Β较大,因此具有比普通内螺纹管更大的扰流作用;而一般齿尖是最佳汽化和凝结核心,本齿的上梯形1下底、与下梯形2上底部分结合处产生的棱角,使汽化和凝结核心的数量,比原普通内螺纹管增加了一倍以上,更有利于汽化和凝结。螺纹管齿的下梯形2底角较小、和传热管的底壁结合面加大,有效地将应力分散,起着增加管子强度作用,从而大大消除了原普通内螺纹镀锌钢管(高齿内螺纹和高低齿内螺纹)以后的弯、胀、扩过程中出现的质量问题及缺陷,提高了管材加工使用性能,减少蒸发器和冷凝器的胀、扩管加工过程中扩口裂的机率,进而减少内漏现象的发生,提高优质成品率。

The lower trapezoidal 2 is isosceles trapezoidal or isosceles trapezoidal, and its side length or the same side length C=0.030.08mm upper trapezoidal 1 apex angle, that is, the apex angle_1=1230 degrees of thin teeth. The utility model has thin tooth shape, large tooth height, and a bigger angle between the helix of the tooth shape of the tube and the axis of the main pipe, so it has a bigger disturbing effect than the common inner thread pipe; and the general tooth tip is the best vaporization and condensation nodule center, and the edge angle produced at the junction of the upper trapezoid 1 bottom of the tooth and the upper and lower trapezoid 2 bottom of the tooth makes vaporization and condensation. The number of core knots is more than doubled than that of the original internal thread tubes, which is more conducive to vaporization and condensation. The lower trapezoidal two bottom angles of the threaded pipe teeth are small, and the bottom wall joint of the heat transfer pipe is enlarged, thus effectively dispersing the stress and increasing the strength of the pipe, thus greatly eliminating the quality problems and defects in bending, expanding and expanding of the original common galvanized steel pipe with internal threads (high-tooth internal threads and high-low-tooth internal threads). The utility model improves the processing performance of the pipe, reduces the expanding crack probability of the evaporator and the condenser in the process of expanding and expanding the pipe, thereby reduces the occurrence of the internal leakage phenomenon and improves the yield of high quality products.

同时,无缝管生产自身技术,消除了焊接管焊缝处热阻大等质量问题,保证了内表面结构形式的完整性。而且对于制造蒸发器和冷凝器的厂家来说,不增加铜管使用量,就可得到比原来传热元件更高换热效果的热交换器。本实用新型从结构上增大了镀锌钢管管内表面积,使扰流效应更加明显,因此提高对流换热系数。以下结合附图对本实用新型作进一步描述。附图说明一种瘦形齿内螺纹无缝高效传热管,管内表面上加工多条有螺旋角Β的齿形,横截面为上、下两个梯形12相连的齿肋结构。

At the same time, the seamless pipe production technology eliminates the welding seam heat resistance and other quality problems, and ensures the integrity of the internal surface structure. And for the manufacturer of evaporator and condenser, the heat exchanger with higher heat transfer efficiency can be obtained without increasing the use of copper tube. The utility model enlarges the inner surface area of the galvanized steel pipe from the structure, and makes the turbulence effect more obvious, thus improving the convective heat transfer coefficient. The following is further described with the accompanying drawings. The drawings illustrate a thin-tooth seamless heat transfer tube with internal thread. The tube surface is machined with a plurality of teeth with helical angle_. The cross-section of the tube is a structure of two trapezoidal 12-connected teeth ribs.

有了济南镀锌管厂家上面的小总结,希望对广大客户有所帮助,如果有什么不理解的或者寻求帮助的请点击我们的官方网站:济南镀锌管http://www.jnxxjm.com  或者来电咨询,我们会尽全力为您解决

With the summary of Jinan galvanized pipe manufacturer, I hope it will be helpful to our customers. If you have any incomprehension or seek help, please click our official website: Jinan galvanized pipe hhttp://www.jnxjm.com or inquiry, we will try our best to solve it for you.



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