CN108355783B - Precision cutting cyclone milling unit for crushing grain - Google Patents

Abstract

The invention provides a precision cutting cyclone milling device for crushing grains. The precision cutting cyclone milling device for crushing grains includes an air inlet chamber and a crushing and separating chamber connected to each other. The crushing and separating chamber is provided with a feeding The crushing and separating chamber is equipped with a crushing device and a classifying device; the crushing device includes a crushing rotor and a crushing stator, the crushing rotor is mounted on the first drive shaft for rotation, and the crushing stator is installed in the crushing and separating chamber. On the inner wall, the grading device includes a grading wheel, which is rotatably mounted on the second drive shaft. The precision cutting cyclone milling device for crushing grains has a compact structure, which greatly reduces the equipment space for crushing and separation, reduces the amount of secondary air intake, and optimizes the crushing flow field.

Description

Precision cutting cyclone milling unit for crushing grain

technical field

The invention designs a pulverizing device, in particular relates to a precision cutting cyclone pulverizing device for pulverizing grain.

Background technique

Pulverization includes dry pulverization and wet pulverization, and dry pulverization includes jet pulverization, ball mill pulverization, mechanical impact pulverization and roller pulverization. However, currently used airflow milling has high energy consumption and is only suitable for crushing high value-added drugs; dry ball milling is difficult to cool during crushing, and it is easy to heat up and cause the material to heat up, and there is a problem that it is difficult to separate the material and the grinding ball. Defects: The traditional mechanical impact crushing and grinding roller crushing, after crushing, the particles of the material are large, and there is a problem that it cannot be finely crushed.

Contents of the invention

The object of the present invention is to solve the deficiencies in the prior art, thereby providing a precision cutting cyclone crushing device for crushing grains. The present invention has a compact structure and can optimize the crushing flow field.

According to the technical solution provided by the present invention, a precision cutting cyclone milling device for crushing grains, the precision cutting cyclone milling device for crushing grains includes an air inlet chamber and a crushing and separating chamber communicating with each other, and the crushing and separating chamber There is a feed inlet and a discharge port on the top, and a crushing device and a classification device are installed in the crushing and separating chamber; the crushing device includes a crushing rotor and a crushing stator, and the crushing rotor is installed on the first drive shaft for rotation, and the crushing stator is installed On the inner wall of the pulverization and separation chamber, the classifying device includes a classifying wheel, and the classifying wheel is rotatably mounted on the second drive shaft.

Further, the pulverizing rotor includes: a first pulverizing drum and a fixed plate arranged on the upper end of the first pulverizing drum; a plurality of movable blades are arranged at intervals on the outer wall of the first pulverizing drum, and a plurality of movable blades are arranged between adjacent movable blades. A first flow hole; a plurality of second flow holes are arranged on the fixed plate.

Further, the crushing stator includes a second crushing drum, and a plurality of fixed blades are arranged at intervals on the second crushing drum.

Further, the two ends of the second crushing drum are respectively provided with a first installation ring and a second installation ring, the first installation ring and the second installation ring are correspondingly provided with slotted holes, and the two ends of the fixed blade are correspondingly inserted into the first installation ring. in the slotted hole on the first mounting ring and the slotted hole on the second mounting ring.

Further, a scale is provided on the edge of the slot along the concave direction of the slot.

Further, the pulverization and separation chamber includes a pulverization chamber and a classification chamber respectively communicated with the air inlet chamber, the pulverization device is located in the pulverization chamber, and the classification device is located in the classification chamber.

Further, the crushing chamber is surrounded by the outer circumference of the classifying chamber, and the air inlet chamber is located below the crushing chamber and the classifying chamber.

Further, a vortex platform is also provided in the classifying chamber, and the vortex platform is installed on the first drive shaft.

As can be seen from the above, the precision cutting cyclone milling device for crushing grain provided by the present invention has the following advantages compared with the prior art:

1) The precision cutting cyclone crushing device drives the materials in the crushing and separating chamber to form a swirling flow, with a reasonable structure.

2) The integrated design of the classification chamber and the crushing chamber has a compact structure, which greatly reduces the equipment space for crushing and separation, reduces the secondary air intake, and optimizes the crushing flow field.

3) The crushing rotor is installed outside the circumference of the grading wheel, and the moving blade is installed on the rotor, and there are a number of flow holes on the rotor for the material to enter and exit. After the coarse material is discharged, it can immediately rub against the rotary knife to improve the crushing efficiency and classification efficiency.

4) The fixed blade is separated design, the distance between the fixed blade can be adjusted, so the distance between the fixed blade and the moving blade can be adjusted to adapt to materials of different particle sizes, and the installation and maintenance are convenient.

5) A vortex platform is set under the grading wheel to accelerate the vortex flow of materials to the bottom of the rotor. At the same time, an air inlet channel is set under the vortex platform to promote the rapid discharge of materials from the bottom hole of the rotor for crushing, preventing materials from accumulating at the bottom of the rotor and improving crushing efficiency.

6) The drive shaft of the classification wheel is installed opposite to the drive shaft of the crushing rotor, so that the rotating speed of the rotary knife and the speed of the classification wheel can be adjusted separately, and it is easier to seal.

7) An air cooling device is installed outside the air inlet to circulate the material through the cold air to prevent the high temperature rise of the fibrous material during crushing.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a top view of the crushing rotor in the present invention.

Fig. 3 is a front view of the crushing rotor in the present invention.

Fig. 4 is a structural schematic diagram of the fixing plate in the present invention.

Fig. 5 is a top view of the pulverized stator in the present invention.

1. Air intake chamber, 2. Grinding and separating chamber, 210. Grinding chamber, 220. Grading chamber, 3. Feeding port, 4. Discharging port, 5. Grinding rotor, 510. First crushing drum, 511. Moving blade , 512. the first flow hole, 520. the fixed plate, 521. the second flow hole, 6. the crushing stator, 610. the second crushing drum, 611. the fixed blade, 7. the classification wheel, 8. the first drive shaft, 9 . Second drive shaft, 10. First motor, 11. Second motor, 12. Eddy current platform.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The terms "inner" and "outer" are used to refer to directions toward or away from, respectively, the geometric center of a particular component.

As shown in Figure 1, a precision cutting cyclone milling device for crushing grains, the precision cutting cyclone milling device for crushing grains includes an air inlet chamber 1 and a crushing and separating chamber 2 communicating with each other, the air inlet chamber 1 is used to input low-temperature gas. The pulverization and separation chamber 2 is provided with a feed port 3 and a discharge port 4. The pulverization and separation chamber 2 includes a pulverization chamber 210 and a classification chamber 220 respectively communicated with the air inlet chamber 1. A crushing device is installed in the chamber 210, and a classifying device is installed in the classification chamber 220; the crushing device includes a crushing rotor 5 and a crushing stator 6, and the crushing rotor 5 is installed on a first drive shaft 8, and the first drive shaft 8 is also connected to the first motor 10, the first motor 10 can drive the first drive shaft 8 to rotate, thereby driving the crushing rotor 5 to rotate, the crushing stator 6 is installed on the inner wall of the crushing and separation chamber 2, and the crushing stator 6 is coaxially sleeved It is provided outside the grinding rotor 5 , and a gap is formed between the grinding rotor 5 and the grinding stator 6 . The grading device includes a grading wheel 7, the grading wheel 7 is installed on a second drive shaft 9, and the second drive shaft 9 is also connected to a second motor 11, and the second motor 11 can drive the second drive shaft 9 Rotate, thereby drive classification wheel 7 to rotate. Under the action of the airflow in the air inlet chamber 1, the material enters the crushing device from the feed port 3, and after being crushed by the crushing device, it leaves the crushing device and enters the classifying device with the rise of low-temperature gas, and rotates through the classifying wheel to meet the requirements. The particles are transported to the discharge port 4 along with the low-temperature gas, and the unqualified materials are thrown out of the classifying wheel 7 under the action of centrifugal force.

As shown in Figures 1 to 5, the pulverizing rotor 5 includes: a first pulverizing drum 510 and a fixing plate 520 arranged on the upper end of the first pulverizing drum 510, the first pulverizing drum 510 is cylindrical, and on its outer wall A plurality of moving blades 511 are arranged at intervals, and a plurality of first flow holes 512 are arranged in the interval between adjacent moving blades 511; a plurality of second flow holes 521 are arranged on the fixed plate 520, and the second flow holes 521 are waist-shaped holes, and the second flow holes 521 are arranged along the edge of the fixing plate 520 . The pulverizing stator 6 includes: a second pulverizing drum 610, on which a plurality of fixed blades 611 are arranged at intervals, and a plurality of third flow holes are arranged on the second pulverizing drum 610 between adjacent fixed blades 611 . When the first drive shaft 8 drives the crushing rotor 5 to rotate, the movable blade 511 on the crushing rotor 5 cooperates with the fixed blade 611 on the crushing stator 6, so that the material can be continuously ground into material particles.

In order to make the distance between the fixed blade 611 and the movable blade 511 adjustable to suit materials of different particle sizes, the two ends of the second crushing drum 610 are respectively provided with a first mounting ring and a second mounting ring. The first mounting ring and the second mounting ring are correspondingly provided with slotted holes, and the two ends of the fixed blade 611 are correspondingly inserted into the slotted holes of the first mounting ring and the slotted holes of the second mounting ring.

In order to quantify the adjustment distance of the fixed blade 611 and improve the adjustment accuracy, a scale is provided on the edge of the slot along the concave direction of the slot.

As shown in Figure 1, the pulverization chamber 210 is surrounded by the periphery of the classification chamber 220, and the air intake chamber 1 is located below the pulverization chamber 210 and the classification chamber 220, and low-temperature gas can enter the air intake chamber 1, and the low-temperature gas It can first fill the crushing chamber 210, then flow into the classification chamber 220 from the crushing chamber 210 located on the outer periphery of the classification chamber 220, and bring the material particles formed by grinding in the crushing chamber 210 into the classification wheel 7, and the micro-materials will be crushed under the rotation of the classification wheel 7. The particles are discharged from the discharge port 3 along with the rotating air flow of the classifying wheel 7, and the material particles that do not meet the particle size requirements are thrown to the inner wall of the crushing rotor 5 under the action of centrifugal force, and a small part of coarse particles are discharged from the first stage on the crushing rotor 5. The circulation hole 512 turns out, and most of the material particles descend along the inner wall of the pulverizing rotor 5 .

As shown in Figure 1, in order to prevent the accumulation of materials that slide to the bottom of the classification chamber 220, the bottom of the classification chamber 220 is also provided with a vortex platform 12, and the edge of the vortex platform 12 forms a circle of guide surfaces, and the vortex platform 12 is installed at the bottom of the classification chamber 220. On a drive shaft 8, it can rotate together with the pulverizing rotor 5 and the first drive shaft 8. With the rotation of the vortex platform 12, the larger material particles falling on the vortex platform 12 will follow the guide surface of the edge of the vortex platform 12. Sliding down, and driven by the airflow, larger materials re-enter the crushing chamber 210 from the second flow hole 521 on the crushing rotor 5 to be crushed again.

According to the preferred design scheme of the above-mentioned structure and size, the present invention provides the following preferred embodiments: the inner diameter of the crushing and separating chamber 2 is 500 mm, the diameter of the crushing rotor 5 is 350 mm, the effective cutting length of the fixed blade 611 and the movable blade 511 is 400 mm, and the crushing The rotating speed of rotor 5 is 1300 r/min, the rotating speed of classification wheel 7 is 3000 r/min, the air intake volume after water cooling is 800m ³ /h, and the installed power is 25 kW. For example, when the present invention is used to crush oats, the oats must first be roughly crushed so that the feed particle size is less than 3 mm, the particle size distribution of the crushed product is 100-500 mesh, and the production capacity of oats is 10-100 kg/h.

The working process of the present invention is as follows: the low-temperature gas is sent into from the intake chamber 1, then the second motor 11 drives the second drive shaft 9 to rotate, and the second drive shaft 9 drives the classifying wheel 7 to rotate, and at the same time, the first motor 10 drives the first The drive shaft 8 rotates, and the first drive shaft 8 drives the pulverizing rotor 5 to rotate. When the system is stable, the material enters from the feed port 3 and is sheared and crushed between the fixed blade 611 and the movable blade 511. The crushed material particles rise with the low-temperature gas entering the air inlet chamber 1 and reach the upper fixed plate 520. , enter the interior of the classification chamber 220 from the second flow hole 521 on the fixed plate 520; after the material particles enter the classification chamber 220, under the action of the classification wheel 7, the pulverized fine particles enter the discharge port 4 from the middle of the classification wheel 7, The material particles that do not meet the particle size requirements are thrown onto the inner wall of the crushing rotor 5 under the action of centrifugal force, a small part of coarse particles are transferred out from the first flow hole 512 on the crushing rotor 5, and most of the material particles flow along the crushing rotor 5. The inner wall descends, and under the action of the vortex platform 12, it rotates to the bottom edge of the crushing rotor 5. At this time, the low-temperature gas sent from the air inlet chamber 1 below the vortex platform 12 will drive the coarse material particles from the first crushing rotor 5 bottom. All the particles are discharged from the first flow hole 512, and the discharged coarse material particles enter the crushing chamber 210 again for shearing and crushing. The above process is repeated until the material particles meet the particle size requirements, and finally the fine cutting and particle separation of the material are completed.

Those of ordinary skill in the art should understand that the above descriptions are only specific embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the gist of the present invention, All should be included within the protection scope of the present invention.

Claims (5)

1. A precision cutting cyclone milling device for crushing grains, characterized in that the precision cutting cyclone milling device for crushing grains includes an air inlet chamber (1) and a crushing and separation chamber (2) connected to each other, the The pulverization and separation chamber (2) is provided with a feed port (3) and a discharge port (4), the discharge port (4) is located above the feed port (3), and the crushing and separation chamber (2) is installed There is a crushing device and a classifying device; the crushing device includes a crushing rotor (5) and a crushing stator (6), the crushing rotor (5) is installed on the first drive shaft (8) for rotation, and the crushing stator (6) is installed On the inner wall of the pulverization and separation chamber (2), the classification device includes a classification wheel (7), and the classification wheel (7) is rotatably mounted on the second drive shaft (9); The pulverization and separation chamber (2) includes a pulverization chamber (210) and a classification chamber (220) respectively communicated with the air inlet chamber (1), and the pulverization chamber (210) surrounds the periphery of the classification chamber (220); the The crushing device is located in the crushing chamber (210), and the classification device is located in the classification chamber (220); the air inlet chamber (1) is located below the crushing chamber (210) and the classification chamber (220); The crushing rotor (5) includes: a first crushing drum (510) and a fixed plate (520) arranged on the upper end of the first crushing drum (510); A plurality of first flow holes (512) are arranged between adjacent moving blades (511) and a plurality of second flow holes (521) are arranged on the fixed plate (520). 2. The precision cutting cyclone milling device for crushing grains according to claim 1, characterized in that, the crushing stator (6) includes a second crushing roller (610), and the upper interval of the second crushing roller (610) is Several fixed blades (611) are provided. 3. The precision cutting cyclone milling device for crushing grains according to claim 2, characterized in that, the two ends of the second crushing drum (610) are respectively provided with a first mounting ring and a second mounting ring, and the The first mounting ring and the second mounting ring are correspondingly provided with slotted holes, and both ends of the fixed blade (611) are correspondingly inserted into the slotted holes of the first mounting ring and the slotted holes of the second mounting ring. 4 . The precision cutting cyclone milling device for crushing grains according to claim 3 , wherein a scale is provided on the edge of the slot along the concave direction of the slot. 5. The precision cutting cyclone milling device for crushing grains according to claim 1, characterized in that, the classifying chamber (220) is further provided with a vortex platform (12), and the vortex platform (12) is installed at the on a drive shaft (8).