螺旋筛(图1)由三段结构相同的筛子组成,筛子呈阶梯状,且彼此可以互换,其中一段筛子的结构如图2所示。其结构形式是:筛子由一排带右旋双头螺纹5和左旋双头螺纹6的螺旋轴2组成。螺旋轴安装在前支座7和后支座10中。支座固定在框架9上。在固定档板8和边上的一根螺旋轴之间有一根无螺纹的轴4;筛 Spiral sieve (Figure 1) consists of three sections of the same structure of the sieve, the sieve was stepped, and can be interchangeable with one of the sieve structure shown in Figure 2. Its structure is as follows: The sieve is composed of a row of screw shaft 2 with right-handed double-headed thread 5 and left-handed double-headed thread 6. The screw shaft is mounted in the front seat 7 and the rear seat 10. The support is fixed on the frame 9. Between the fixed baffle 8 and a screw shaft on the edge of a non-threaded shaft 4; sieve