CN219723080U - Superfine pulverizer - Google Patents

Abstract

The utility model discloses a superfine pulverizer, comprising: the crushing cylinder is provided with two cylindrical crushing cavities which are connected in parallel, and the two crushing cavities are tangential and provided with mutually communicated openings; the inner gear rings are respectively fixed on the inner walls of the lower parts of the two crushing cavities, and crushing teeth are respectively uniformly distributed on the inner walls of the two inner gear rings; the main turntables are respectively positioned in the lower inner cavities of the two inner gear rings, hammer blocks are respectively uniformly distributed on the circumferences of the two main turntables, and the hammer blocks and crushing teeth of the inner gear rings shear materials together; the two main turntables rotate in the same direction, so that the material flow directions at the positions where the two crushing cavities are communicated are opposite. The conical reflux cover downwards extends from the upper part of the crushing cavity to the upper part of the inner cavity of the inner gear ring, and a material flow annular channel is formed between the outer wall of the conical reflux cover and the inner wall of the crushing cylinder; the arc-shaped air guide covers are respectively covered on the upper ports of the crushing cylinder bodies, so that the top of the material flow annular channel is communicated with the top of the conical reflux cover. The superfine pulverizer has high pulverizing efficiency, high yield, compact structure, and low energy consumption and manufacturing cost under the same yield.

Description

Superfine pulverizer

Technical Field

The utility model relates to a pulverizer, in particular to an ultrafine pulverizer, and belongs to the technical field of pulverizing equipment.

Background

Crushing is a very important process in the production of the feed industry. The external force such as hammer sheets, crushing teeth and the like is mainly utilized to strike and shear the materials, and the materials are cut off, so that the materials are subjected to the processes of grain refining and powdering. After the materials are crushed, the specific surface area is increased, which is beneficial to digestion and absorption of animals. The prior crushing system is commonly used for a hammer screen type crusher, a no-screen airflow crusher and the like.

The utility model discloses a rotor of a hammer crusher and a hammer crusher, which are disclosed in Chinese patent publication No. CN212702198U, and comprise a central shaft and a plurality of hammer frame plates which are vertically connected with the central shaft, wherein the hammer frame plates are provided with a plurality of frame plate through holes for penetrating through hammer pin shafts, and further comprise a baffle plate and a plurality of interval bracket components, each interval bracket component comprises at least two groups of bracket side plates, each bracket side plate is provided with a pin shaft through hole matched with the corresponding frame plate through hole, the at least two groups of bracket side plates are arranged between the hammer frame plates in an end-to-end connection manner, the baffle plate is provided with baffle plate notches for placing the hammer, the bracket side plates, the hammer frame plates and the hammer are connected through pin shafts, and the pin shafts penetrate through the frame plate through holes, the pin shaft through holes and the hammer.

According to the hammer mill, a circle of screen is arranged at the position except for a feed inlet in the circumferential direction of the hammer, the hammer is used for beating materials to crush the materials, and the materials meeting the requirements are pumped from the inner side of the screen to the outer side of the screen through the wind power effect to enter the next working procedure. The crushing fineness of the materials depends on the aperture of the screen and the gap between the hammer and the screen, and the arc-shaped installation size of the screen is limited due to the lower manufacturing precision of the hammer, so that the crushing fineness of the materials is very limited; can only be applied to coarse grinding or fine grinding, but not to ultrafine grinding.

The Chinese patent application with publication number of CN114273023A discloses a superfine pulverizer, which comprises a pulverizing mechanism, wherein the pulverizing mechanism comprises: the crushing disc is rotatably arranged on the crushing mechanism; the hammer knife is fixedly connected to the circumferential edge of the crushing disc; the gear ring is fixedly connected to the crushing mechanism, and is matched with the hammer knife and used for crushing materials; and a blocking piece is arranged on the gear ring and used for blocking ascending large-particle materials and rebounding the large-particle materials to the gap area between the gear ring and the hammer knife for secondary crushing.

The superfine pulverizer belongs to no-screen airflow pulverization, the fineness is mainly determined by the linear speed of a pulverizing hammer knife, the centrifugal force generated by materials and the path length of material impact, and under the condition that the linear speed of equipment of the same type is fixed, the path of material impact is lengthened, namely the diameter of a turntable is increased, the rotating speed of the turntable is reduced, and the generated centrifugal force is reduced; the energy consumption is excessive when the rotating speed is increased. Due to the decrease of centrifugal force, the quality of single-particle materials which can flow back into the crushing cavity is decreased, the quality of discharged material particles is increased, and the overall fineness of crushing is also decreased. Therefore, the conventional ultrafine pulverizer is generally applied to fine pulverization, and ultrafine pulverization with a small yield cannot be achieved.

Disclosure of Invention

The utility model aims to overcome the problems in the prior art and provide the superfine pulverizer which has the advantages of high pulverizing efficiency, high yield, compact structure, low energy consumption under the same yield and low manufacturing cost.

In order to solve the above technical problems, the present utility model provides an ultrafine pulverizer, comprising: the crushing cylinder is provided with two cylindrical crushing cavities which are connected in parallel, and the two crushing cavities are tangential and provided with mutually communicated openings; the inner gear rings are respectively fixed on the inner walls of the lower parts of the two crushing cavities, and crushing teeth are respectively uniformly distributed on the inner walls of the two inner gear rings; the main turntables are respectively positioned in the lower inner cavities of the two inner gear rings, hammer blocks are respectively uniformly distributed on the circumferences of the two main turntables, and the hammer blocks and crushing teeth of the inner gear rings shear materials together; the two main turntables rotate in the same direction, so that the material flow directions at the positions where the two crushing cavities are communicated are opposite.

As an improvement of the present utility model, the superfine pulverizer further comprises: the conical reflux covers downwards extend from the upper part of the crushing cavity to the upper part of the inner cavity of the inner gear ring respectively, and a material flow annular channel is formed between the outer wall of the conical reflux cover and the inner wall of the crushing cylinder; the arc-shaped air guide covers are respectively covered on the upper ports of the crushing cylinder bodies, so that the top of the material flow annular channel is communicated with the top of the conical reflux cover.

As a further improvement of the present utility model, the ultra-fine pulverizer further includes: the classifying impellers are respectively positioned in the upper inner cavity of the conical reflux hood; and the discharging volute is positioned above the crushing cylinder body, and the inlet at the lower part of the discharging volute is respectively communicated with the inner cavity of the classifying impeller.

As a further improvement of the utility model, each classifying impeller is respectively fixed at the lower end of the classifying impeller shaft, and the upper end of each classifying impeller shaft is respectively driven by the fineness adjusting motor.

As a further development of the utility model, the flow runs in a figure-8 along the inner walls of the two comminution chambers.

Compared with the prior art, the utility model has the following beneficial effects: 1. the characteristics of material crushing are fully utilized, larger-particle materials are crushed, the situation that finer materials are gathered in a crushing cavity is avoided, the discharge space of qualified materials is increased, excessive crushing of the materials is avoided, the energy consumption of a system is reduced by improving the unit productivity of the materials, and the operation efficiency of equipment is high;

2. the double cavities are smaller in size, higher in machining precision and lower in manufacturing cost;

3. the utilization rate of the cavity is greatly improved, the cavity at the feeding side is used for carrying out primary crushing on materials, the finer materials are discharged from the cavity at the feeding side after primary crushing, and the coarser materials or the reflux materials enter the cavity at the other side through a gap between the two cavities for secondary crushing;

4. the material flow direction at the junction of the two crushing cavities is opposite, the relative speed of the material particles is high, the damage to the circulation layer is facilitated, and the speed difference between the material particles and the hammer blocks or the crushing teeth is improved.

Drawings

The utility model will now be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration only and are not intended to limit the utility model.

FIG. 1 is a front view of an ultra-fine pulverizer of the present utility model;

FIG. 2 is a cross-sectional view of the ultra-fine pulverizer of the present utility model;

FIG. 3 is a cross-sectional view of a pulverizing chamber of the present utility model;

FIG. 4 is a diagram of the drive mechanism of the spindle pulley of the present utility model;

FIG. 5 is a perspective view of the ultra-fine pulverizer of the present utility model;

FIG. 6 is a second perspective view of the pulverizer of the present utility model;

in the figure: 1. a feeding mechanism; 2. crushing a cylinder; 3. an inner gear ring; 4. a main turntable; 5. a hammer block; 6. an arc-shaped air guide sleeve; 7. a conical reflux hood; 8. a classifying impeller; 8a, classifying impeller shafts; 9. discharging spiral case; 9a, a discharge hole; 10. a fineness adjusting motor; 11. a crushing motor; 12. a spindle pulley; 13. a belt; 14. crushing a main shaft; 15. a tensioning wheel; 16. an air duct; 16a, air supplementing port; 17. and (5) a base.

Detailed Description

In the following description of the present utility model, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not mean that the device must have a specific orientation.

The utility model is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the utility model easy to understand.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

As shown in fig. 1 to 6, the ultrafine grinder of the utility model comprises a feeding mechanism 1, a grinding cylinder 2, an inner gear ring 3, a main rotary table 4, a conical reflux cover 7, a classifying impeller 8, a fineness adjusting motor 10, a grinding motor 11, an air cylinder 16 and a base 17, wherein the grinding cylinder 2 is provided with two cylindrical grinding cavities which are mutually arranged side by side and are vertical, and the tangential parts of the two grinding cavities are provided with mutually communicated openings. The side wall of one crushing cavity is connected with a feeding mechanism 1, and the side walls of the two crushing cavities are respectively connected with the feeding mechanism 1, and the two crushing cavities can be used selectively according to the requirement.

The inner walls of the lower parts of the two crushing cavities are respectively fixed with an inner gear ring 3, the two inner gear rings 3 are respectively disconnected at the openings, and crushing teeth are respectively uniformly distributed on the inner walls of the two inner gear rings 3.

The bottoms of the two crushing cavities are respectively provided with a main rotary table 4, the main rotary tables 4 are positioned at the lower parts of the two inner gear rings 3, a plurality of hammer blocks 5 are respectively uniformly distributed on the circumferences of the two main rotary tables 4, and the hammer blocks and crushing teeth of the inner gear rings 3 shear materials together.

The crushing cylinder body 2 is fixed above the air cylinder 16, the air cylinder 16 is fixed on the base 17, an air inlet hole is arranged on the bottom plate of the crushing cylinder body 2, and an air supplementing opening 16a is arranged on the bottom plate of the air cylinder 16. Under the suction effect of the outlet, fresh air enters the inner cavity of the air duct 16 from the air supply port 16a, then enters the crushing cavity from the air inlet hole of the bottom plate, and rotates together with the materials to form a material flow.

The conical reflux hood 7 is positioned in the inner cavity of the crushing cavity, and extends downwards from the upper part of the crushing cavity to the upper part of the inner cavity of the inner gear ring 3 respectively, and a material flow annular channel is formed between the outer wall of the conical reflux hood 7 and the inner wall of the crushing cylinder 2.

The arc-shaped air guide covers 6 are respectively covered on the upper ports of the crushing cylinder bodies 2, so that the top of the material flow annular channel is communicated with the top of the conical reflux cover 7.

The centers of the two main rotary tables 4 are respectively fixed at the upper ends of the crushing main shafts 14, the lower ends of the crushing main shafts 14 penetrate through the air cylinders 16 and extend into the inner cavity of the base 17, the shaft ends are provided with main shaft belt pulleys 12, tension pulleys 15 are arranged between the two main shaft belt pulleys 12, and the two main rotary tables 4 are driven by the same crushing motor 11 through the belt 13, so that the two main rotary tables 4 rotate in the same direction.

During operation, materials enter the crushing cavity, the crushing motor 11 drives the two main turntables 4 to rotate at high speed, the hammer blocks 5 at the periphery of the two main turntables 4 impact the materials at high speed, air flow enters the crushing cavity from below, the materials are crushed under the action of the air flow and physics, and the impacted materials fly to the inner gear ring 3 at high speed and are crushed again by the crushing teeth.

Under the condition of no external force interference, the material hit by the hammer block 5 rotates in the same direction as the hammer block 5 to gradually form a stable annular material layer, so that the relative speed of the material and the hammer block 5 is reduced, and the crushing effect is reduced. The two main turntables 4 rotate in the same direction, so that the directions of the material flows at the through positions of the two crushing cavities are opposite, and the two material flows impact in opposite directions at the opening, thereby being beneficial to destroying respective circulation layers, avoiding forming stable material flows and providing crushing efficiency. After the material flows collide with each other at the junction, part of the material enters the crushing cavity of the other side, so that the material flows along the inner walls of the two crushing cavities in a 8 shape. The material particles entering the other crushing cavity are subjected to the process of reversing the direction of the hammer block 5 until the material particles are in the same direction as the hammer block 5, so that the impact crushing effect is further improved.

The upper inner cavities of the conical reflux hoods 7 are respectively provided with a classifying impeller 8, the inner cavities of the classifying impellers 8 are communicated with a discharge volute 9 positioned above the crushing barrel 2, and a discharge port 9a is arranged on the peripheral wall of the discharge volute 9. The classifying impellers 8 are respectively fixed at the lower ends of the classifying impeller shafts 8a, and the upper ends of the classifying impeller shafts 8a are respectively driven by fineness adjusting motors 10.

The material flow rises to the top of the crushing cavity along the material flow annular channel, is guided into the inner cavity of the conical reflux hood 7 by the arc-shaped air guide hood 6, is then turned to the classifying impeller 8 under the suction effect of negative pressure at the outlet, and the fineness adjusting motor 10 drives the classifying impeller 8 to rotate at a high speed, so that the material generates centrifugal force, and when the particle size of the material particles is larger, the centrifugal force is larger and is thrown back to the bottom of the crushing cavity to crush the material again. Small particles meeting the requirements pass through the classifying impeller 8, upwards enter the discharge volute 9 and are discharged from the discharge hole 9a. The rotation speed of the fineness adjusting motor 10 is adjusted, and the magnitude of centrifugal force can be adjusted, so that the fineness of discharged materials is changed.

The foregoing description of the preferred embodiments of the present utility model illustrates and describes the basic principles, main features and advantages of the present utility model, and is not intended to limit the scope of the present utility model, as it should be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments. In addition to the embodiments described above, other embodiments of the utility model are possible without departing from the spirit and scope of the utility model. The utility model also has various changes and improvements, and all technical schemes formed by adopting equivalent substitution or equivalent transformation fall within the protection scope of the utility model. The scope of the utility model is defined by the appended claims and equivalents thereof. The technical features of the present utility model that are not described may be implemented by or using the prior art, and are not described herein.

Claims (5)

1. A superfine pulverizer, characterized by comprising:

the crushing cylinder is provided with two cylindrical crushing cavities which are connected in parallel, and the two crushing cavities are tangential and provided with mutually communicated openings;

the inner gear rings are respectively fixed on the inner walls of the lower parts of the two crushing cavities, and crushing teeth are respectively uniformly distributed on the inner walls of the two inner gear rings;

the main turntables are respectively positioned in the lower inner cavities of the two inner gear rings, hammer blocks are respectively uniformly distributed on the circumferences of the two main turntables, and the hammer blocks and crushing teeth of the inner gear rings shear materials together;

the two main turntables rotate in the same direction, so that the material flow directions at the positions where the two crushing cavities are communicated are opposite.

2. The ultra-fine pulverizer of claim 1, further comprising:

the conical reflux covers downwards extend from the upper part of the crushing cavity to the upper part of the inner cavity of the inner gear ring respectively, and a material flow annular channel is formed between the outer wall of the conical reflux cover and the inner wall of the crushing cylinder;

the arc-shaped air guide covers are respectively covered on the upper ports of the crushing cylinder bodies, so that the top of the material flow annular channel is communicated with the top of the conical reflux cover.

3. The ultra-fine pulverizer of claim 2, further comprising:

the classifying impellers are respectively positioned in the upper inner cavity of the conical reflux hood;

and the discharging volute is positioned above the crushing cylinder body, and the inlet at the lower part of the discharging volute is respectively communicated with the inner cavity of the classifying impeller.

4. The ultrafine pulverizer of claim 3, wherein each of the classifying impellers is fixed to a lower end of a classifying impeller shaft, and an upper end of each of the classifying impeller shafts is driven by a fineness-adjusting motor.

5. The micronizer according to any one of claims 1 to 4, wherein the stream flows in a figure 8 along the inner walls of the two pulverizing chambers.