自上料搅拌机在行驶的过程中一边行驶车辆一边搅拌内部的混凝土，作为整个搅拌车中很重要的一种设备，搅拌筒在搅拌混凝土，改变混凝土松软度起到了重要作用，以下是它搅拌筒的构造介绍

As a very important equipment in the whole mixer, the mixing drum plays an important role in mixing concrete and changing the softness of concrete. The following is the structure of its mixing drum

1、：整个搅拌筒的壳体是一个变截面而不对称的双锥体，外形似梨型，底段锥体较短，端面封闭并焊接着法兰，通过连接法兰用螺栓与减速器联结。上段锥体的过度部分有一条环行滚道，它焊接在垂直于搅拌筒轴线的平面圆周上，整个搅拌筒通过连接法兰和环形滚道倾斜卧置在固定与机架上的减速器壳体和一对支承滚轮所组成的三点支承结构上，由减速器带动平稳的绕其轴线转动。在搅拌筒滚道圆周上部，通常设有钢带护绕，以限制搅拌筒在自上料搅拌机颠波行驶时向上跳动。

1. : the shell of the whole mixing drum is a variable cross-section and asymmetric double cone, which looks like a pear shape. The cone at the bottom section is short, the end face is closed and welded with a flange, and is connected with the reducer by bolts through the connecting flange. The transition part of the upper cone has an annular raceway, which is welded on the plane circumference perpendicular to the axis of the mixing drum. The whole mixing drum is obliquely lying on the three-point support structure composed of the reducer shell fixed on the frame and a pair of support rollers through the connecting flange and the annular raceway, and the reducer drives it to rotate smoothly around its axis. At the upper part of the circumference of the mixing drum raceway, a steel belt guard is usually set to limit the upward jumping of the mixing drum when traveling from the loading mixer.

2、内部结构：它与双锥形和梨形搅拌机的内部结构都不同，这是为了适应在单一筒口不倾翻反转卸料和进料搅拌的工艺要求而设计的。搅拌筒从筒口到筒底沿内壁对称焊接着两条连续的带状螺旋叶片，当搅拌筒转动时，两条叶片既被带动作围绕搅拌筒轴线的螺旋运动，这是搅拌筒对混凝土进行搅拌或卸料的根本装置。另外，为了加强搅拌效果，在搅拌筒的中下部两条螺旋叶片间加装有辅助搅拌叶片。

2. Internal structure: it is different from the internal structure of double cone and pear mixer, which is designed to meet the process requirements of reverse unloading and feed mixing without tipping at a single barrel opening. Two continuous ribbon spiral blades are symmetrically welded along the inner wall from the opening to the bottom of the mixing drum. When the mixing drum rotates, the two blades are driven to spiral around the axis of the mixing drum, which is the fundamental device for mixing or unloading concrete by the mixing drum. In addition, in order to strengthen the mixing effect, an auxiliary mixing blade is added between the two spiral blades at the middle and lower part of the mixing cylinder.

内部结构

internal structure

3、搅拌筒的筒口结构：沿两条螺旋叶片的内边缘焊接一段进料导管，其结构如图。进料导管与筒壁以同心圆形式分隔为内外两部份，中心部分的导管为进料口，混凝土由此装入自上料搅拌机搅拌筒，导管与筒壁形成的环形空间为出料口，从出料口的端面看它被两条螺旋叶片分割成两半，卸料时，混凝土在叶片反向螺旋运动的顶推下，从此流出。

3. Barrel mouth structure of mixing drum: a section of feed pipe is welded along the inner edges of two spiral blades, and its structure is shown in the figure. The feed conduit and the cylinder wall are separated into inner and outer parts in the form of concentric circles. The conduit in the central part is the feed inlet, and the concrete is loaded into the mixing cylinder of the charging mixer. The annular space formed by the conduit and the cylinder wall is the discharge outlet. From the end face of the discharge outlet, it is divided into two parts by two spiral blades. During unloading, the concrete flows out from here under the push of the reverse spiral movement of the blades.

筒口结构

Tube mouth structure

通过对自上料搅拌机搅拌筒构造了解之后，可以提高它的使用，并且在以后操作过程中，能够用得上。搅拌筒在整个搅拌车中，起到了很重要的作用。

After understanding the structure of the mixing drum of the charging mixer, its use can be improved and can be used in the later operation. The mixing drum plays a very important role in the whole mixing truck.