Concrete mixer is a machine that mixes cement, sand and gravel as aggregate and water and mixes them into different concrete for mixing. Although the operation equipment is simple and convenient, injury accidents occur due to paralysis or inadequate safety protection.

主要由拌筒、加料和卸料机构、供水系统、原动机、传动机构、机架和支承装置等组成。按工作性质分间歇式（分批式）和连续式；按搅拌原理分自落式和强制式；按安装方式分固定式和移动式；按出料方式分倾翻式和非倾翻式；按拌筒结构形式分立式、鼓筒式、双锥、圆盘立轴式和圆槽卧轴式等。

It is mainly composed of mixing drum, feeding and unloading mechanism, water supply system, prime mover, transmission mechanism, frame and support device. According to the nature of work, it is divided into intermittent type (batch type) and continuous type; According to the mixing principle, it is divided into self falling type and forced type; According to the installation mode, it is divided into fixed type and mobile type; According to the discharging mode, it is divided into tipping type and non tipping type; According to the structural form of mixing drum, it can be divided into vertical type, drum type, double cone, disc vertical shaft type and circular groove horizontal shaft type.

一、搅拌机应安装在坚实的地基上，并由支撑框架牢固地支撑。须注意调整装卸平台、卸货平台及卸土车的高度。不得使用轮胎和支撑架作为支撑，应当设置防砸棚，经有关部门验收合格后方可使用。

1、 The mixer shall be installed on a solid foundation and firmly supported by a support frame. Pay attention to adjusting the height of loading platform, unloading platform and dump truck. Tires and support frames shall not be used as supports. Anti smashing sheds shall be set up and can be used only after passing the acceptance of relevant departments.

混凝土搅拌机经营者必须经过培训、考核，并取得岗位经营许可证，无经营许可证。

The operator of concrete mixer must undergo professional training and assessment, and obtain the post operation license, but there is no operation license.

二、使用前应检查确认离合器、制动器。生产装置等零部件齐全良好，钢丝绳完好，滚筒内不得有异物，并进行选择空车运转需要检查搅拌筒和搅拌叶的转动一个方向，各工作分析装置的操作、制动系统确认企业正常，方可开始使用。

2、 Check and confirm the clutch and brake before use. The safety production device and other parts shall be complete and in good condition, the steel wire rope shall be intact, there shall be no foreign matter in the drum, and the selection shall be made. For empty vehicle operation, it is necessary to check the rotation direction of the mixing drum and mixing blade, and the operation and braking system of each work analysis device can be used only after confirming that the enterprise is normal.

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