Maintenance And Care Of Mixing Station - Twin-shaft Mixer

The double-shaft mixer is a device that uses a pair of spiral shafts with stirring blades to synchronously rotate, spray humidify and stir the powdered materials while conveying them. It can be used to stir and crush clay materials in the ceramsite industry; and evenly stir and mix raw materials such as fly ash and aggregates, additives, etc. This type of equipment has high stirring efficiency, compact structure, stable operation, clean and environmentally friendly. It is used in the chemical, mining, ceramsite and other industries to humidify, stir and transport solid granular materials or powders. The outstanding advantages of the twin-shaft mixer are as follows: 1. The entire mixing and conveying process is carried out in a sealed space, without dust leakage, clean and environmentally friendly; 2. It integrates mixing, humidification and conveying, with good mixing uniformity, high production efficiency and large production capacity; 3. The shaft end adopts a labyrinth and packing combination seal, which plays a double sealing role and has a good sealing effect; 4. The mixing blade is made of wear-resistant material and has a special surface treatment, which has high wear resistance; 5. The whole machine has a compact structure, small space occupation, stable transmission, high reliability and low noise. The main structure of the twin-shaft mixer is shown in the figure below, which mainly includes a drive device, a spiral blade shaft at the feed inlet, a tank body, a discharge port and other parts. The drive device consists of a motor-coupling-reducer-gear pair. The motor drives the reducer through the coupling, and then drives the gear pair to run, so as to realize the opposite movement of the two spiral blade shafts. The spiral blade shaft is equipped with a spiral blade, and the spiral blade is made of a wear-resistant material. The material enters the tank through the feed port, and is stirred and crushed by the spiral blades. The material is discharged from the discharge port after the particle size is uniform.
The twin-shaft mixer uses the synchronous rotation of two symmetrical spiral shafts to add water and stir while conveying dry ash and other powdered materials, and evenly humidifies the dry ash and powdered materials, so that the humidified materials do not emit dry ash or leak water droplets, which is convenient for loading and transporting the humidified ash or transferring it to other conveying equipment.
The twin-shaft mixer is mainly composed of a casing, a spiral shaft assembly, a drive device, piping, a cover plate, a chain cover and other components. The specific structural performance characteristics are as follows:
The shell is mainly composed of plates and steel sections, which are welded and formed in the manufacturing plant and assembled with other components. It is the support of the twin-shaft mixer. The shell is tightly sealed, and there will be no flying ash or ash leakage.
The spiral shaft assembly is the main component of the twin-shaft mixer, and its components mainly include left and right rotating spiral shafts, bearing seats, bearing sleeves, bearing covers, gears, sprockets, oil cups, blades and other parts.
The left and right spiral shafts have high manufacturing precision requirements and good process performance, and have strict matching requirements with the bearing seat, bearing sleeve, and bearing cover. The gear module is 8, the number of teeth is 60, and the tooth angle is 20°; the sprocket pitch is 50.8, the number of teeth is 25, and the tooth shape is GB1224-85. The gears and sprockets are protected by protective covers and can operate safely and effectively. The oil cup is a press-fit pressure-filled oil cup, which is convenient and effective for filling lubricating oil.
The material of the double-shaft mixer blade is a composite ceramic that is wear-resistant and not easy to stick to ash. The blade structure is reasonably and simply designed, easy to replace after wear, and has a long service life.
The water-adding and humidifying piping is mainly composed of a pipe, a joint and a nozzle. The nozzle adopts a stainless steel atomizing cone nozzle, which is arranged above the inside of the mixer casing and arranged axially along the spiral shaft direction to form a water curtain to facilitate the humidification and stirring of the material. The nozzle has a simple structure and is easy to replace. It is made of stainless steel and is corrosion-resistant and durable. The moisture content of the wet ash can be adjusted by operating the manual regulating valve on the water supply pipeline.
The cover plate mainly includes the left cover plate, the middle cover plate, the right cover plate, the hole cover and the inspection hole cover. There are six inspection holes on both sides of the twin-shaft mixer to facilitate the operator's routine inspection and maintenance. The twin-shaft mixer is used for the end of pneumatic conveying.