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在制造风动冷冻机中,热交换器是主要设备之一。它是由108根ф10×1毫米紫铜管分九层左、右旋交替绕制而成。一般采用整盘铜管绕制,只焊接进、出口接头。面我厂只购进1.5～2米左右短铜管,必须焊接接长。例如第一层铜管为三根同时并排绕制,每根长22米左右。铜管绕制时,弯管外侧受拉应力,弯管内侧受压应力。其绕后工作压力为8公斤/厘米~2。试验压力为12公斤/厘米~2,保证不渗漏。这就给接头的焊
In the manufacture of air-cooled freezers, heat exchangers are one of the major equipment. It is made of 108 ф10 × 1 mm copper tubes divided by nine left and right hand turns. Generally use the whole disk around the system, only welded into the outlet connector. Surface I plant only purchased about 1.5 to 2 meters short copper tube, you must weld long. For example, the first layer of copper for the three parallel winding side by side, each about 22 meters long. When the copper pipe is wound, the outer side of the pipe bears the tensile stress and the inner side of the pipe bears the compressive stress. The pressure around the work of 8 kg / cm ~ 2. Test pressure of 12 kg / cm ~ 2, to ensure that no leakage. This gives the connector of the welding