喷嘴的结构如图 1所示。图 1　喷嘴制作工艺如下 :1.首先根据尺寸Ｒ选择一种合适的钢管 ,然后根据略大于高度Ｈ的尺寸每件下料。如图 2所示。2 .根据图形尺寸计算出锥度α。然后 ,将钢管沿其中心在长度方向锯一长度略小于Ｈ开口 ,再利用热弯的方法使钢管张开成锥度α。如图 3所 The structure of the nozzle shown in Figure 1. Figure 1 nozzle production process is as follows: 1. First, according to the size of R to choose a suitable steel pipe, and then slightly larger than the height of H according to the size of each blanking. as shown in picture 2. 2 according to the calculation of the size of the taper taper α. Then, the length of the pipe along the length of the sawing along its center is slightly smaller than the H opening, and then use the method of hot bending open the pipe taper α. As shown in Figure 3