Powder screening device for jet mill

Abstract

The utility model belongs to the technical field of jet mills, and particularly relates to a powder screening device for a jet mill, which comprises a bearing mechanism, a screening mechanism and a screening mechanism, the bearing mechanism comprises a bearing box, the upper end face of the bearing box is provided with a feeding port, and the lower end face of the bearing box is provided with a discharging port. A sieving mechanism is arranged in the bearing box, and the sieving mechanism is suitable for sieving powder in the bearing box; the bearing mechanism is arranged, powder to be crushed is poured into the bearing mechanism to be temporarily stored, then the screening mechanism is started, the temporarily stored powder is screened, powder suitable for being crushed by the jet mill is sorted out, large-particle-size powder is intercepted, the working efficiency of the jet mill is improved, and the working life of the jet mill is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of air flow pulverizers, and in particular relates to a powder screening device for air flow pulverizers. Background Art

[0002] The pulverizing mechanism of the airflow pulverizer determines its wide application range and high finished product fineness. Typical materials include: super-hard diamond, silicon carbide, metal powder, etc., high-purity requirements: ceramic colorants, medicine, biochemistry, etc., low-temperature requirements: medicine, PVC. By changing the ordinary air of the air source to inert gases such as nitrogen and carbon dioxide, the machine can become an inert gas protection device, which is suitable for the pulverization and grading of flammable, explosive, and oxidizable materials.

[0003] Before using the existing air flow pulverizer, the operator will directly put the powder into the air flow pulverizer, and then start the air flow pulverizer to crush the powder. However, the particle sizes of the powders to be crushed are not exactly the same. There will be some coarse powders whose particle sizes exceed the normal crushing size of the air flow pulverizer. After this kind of powder enters the air flow pulverizer, it will increase the workload of the machine, thereby reducing the working life of the air flow pulverizer.

[0004] Therefore, a powder screening device for an airflow pulverizer is designed to solve the technical problem in the prior art that large-particle powder is directly put into the airflow pulverizer for pulverization, resulting in a reduction in the service life of the airflow pulverizer. Utility Model Content

[0005] The utility model aims to provide a powder screening device for an air flow pulverizer to solve the above technical problems.

[0006] In order to solve the above technical problems, the utility model provides a powder screening device for an air flow mill, comprising:

[0007] The bearing mechanism is arranged on one side of the air flow pulverizer; wherein

[0008] The bearing mechanism comprises a bearing box, the upper end surface of which is provided with a feed inlet, and the lower end surface of which is provided with a discharge outlet; and

[0009] A screening mechanism is provided inside the carrying box, and the screening mechanism is suitable for screening the powder inside the carrying box.

[0010] Furthermore, the screening mechanism comprises: a plurality of screen plates;

[0011] Each of the sieve plates is vertically arranged, and each sieve plate is provided with sieve holes; and

[0012] The diameter of each sieve hole gradually decreases from top to bottom.

[0013] Furthermore, a driving assembly is provided on one side of each sieve plate;

[0014] The drive assembly comprises:

[0015] A turntable, one end surface of which is connected to a driving rod by a bearing;

[0016] A connecting piece is arranged at one end of the sieve plate; wherein

[0017] The other end of the driving rod is connected to the connecting member bearing.

[0018] Furthermore, the distance between the connection point between each driving rod and each rotating disk and the center of the corresponding rotating disk increases from top to bottom.

[0019] Furthermore, a motor is provided on one side of the end surface of the bottom sieve plate away from the driving rod;

[0020] The output end of the motor is connected to the lowermost sieve plate.

[0021] Furthermore, gear teeth are arranged on the outer wall of each sieve plate;

[0022] The gear teeth on the outer walls of every two adjacent sieve plates mesh with each other.

[0023] Furthermore, a plurality of slide grooves are provided on the inner wall of the carrying box; and

[0024] Each of the sieve plates is provided with a sliding block on its outer side;

[0025] Each of the sliding blocks corresponds to each of the sliding grooves.

[0026] Furthermore, a cyclone separator is provided on one side of the airflow pulverizer;

[0027] The discharge end of the air flow pulverizer is connected to the feed end of the cyclone separator.

[0028] The beneficial effect of the utility model is that the utility model is provided with a carrying mechanism, the powder to be crushed is poured into the carrying mechanism for temporary storage, and then the screening mechanism is started to screen the temporarily stored powder, select the powder suitable for crushing by the air flow mill, intercept the powder with large particle size, improve the working efficiency of the air flow mill, and extend its working life.

[0029] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model.

[0033] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the carrying mechanism of the utility model;

[0034] Figure 3 It is a cross-sectional structural schematic diagram of the bearing mechanism of the utility model;

[0035] Figure 4 The utility model Figure 3 A schematic diagram of the enlarged structure of part A.

[0036] In the figure:

[0037] 1. Carrying mechanism; 10. Carrying box; 11. Slide; 12. Sliding block; 13. Discharging port; 14. Feeding port;

[0038] 2. Screening mechanism; 20. Motor; 21. Turntable; 22. Screen plate; 23. Connecting piece; 24. Driving rod.

[0039] 3. Air flow mill;

[0040] 4. Cyclone separator. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] Before using the existing air flow pulverizer, the operator will directly put the powder into the air flow pulverizer, and then start the air flow pulverizer to crush the powder. However, the particle sizes of the powders to be crushed are not all the same. There may be some powders whose particle sizes exceed the normal crushing size of the air flow pulverizer. After this kind of powder enters the air flow pulverizer, it will increase the workload of the machine, thereby reducing the working life of the air flow pulverizer.

[0043] In order to solve the above technical problems, in at least one embodiment, a powder screening device for an airflow pulverizer is provided, comprising: a carrying mechanism 1, arranged on one side of the airflow pulverizer; wherein the carrying mechanism 1 comprises a carrying box 10, the upper end surface of which is provided with a feed port 14, and the lower end surface of which is provided with a discharge port 13; and a screening mechanism 2 is arranged inside the carrying box 10, and the screening mechanism 2 is suitable for screening the powder inside the carrying box 10;

[0044] By providing a carrying mechanism, the powder to be crushed is poured into the carrying mechanism for temporary storage, and then the screening mechanism is started to screen the temporarily stored powder, select the powder suitable for crushing by the airflow pulverizer, intercept the powder with large particle size, improve the working efficiency of the airflow pulverizer, and extend its working life.

[0045] In some embodiments, the powder to be crushed is introduced into the supporting box 10 through the feed port 14 and falls on the top sieve plate 22. The number of sieve plates 22 is preferably 3, and the three sieve plates 22 are vertically arranged. The sieve hole diameter on the top sieve plate 22 is the largest, and the sieve hole diameter on the bottom sieve plate 22 is the smallest. The powder to be crushed passes through the three layers of sieve plates 22, and the powder that completely meets the crushing particle size of the air flow mill 3 passes through the third layer of sieve plate 22 and is discharged from the discharge port 13 and enters the air flow mill 3 for crushing. The powders of different particle sizes are classified through the three layers of sieve plates 22, and the powders are pre-crushed by the corresponding powder crushing device and then re-introduced into the air flow mill 3 for crushing to avoid increasing the workload of the air flow mill 3.

[0046] In some embodiments, in order to improve the screening efficiency of the sieve plate 22, a motor 20 is arranged on one side of the lowest sieve plate 22, and a turntable 21 is connected to the output end of the motor 20. The turntable and the connecting piece 23 arranged on the side of the lowest sieve plate 22 are connected by a driving rod 24. When the motor 20 is started, the turntable 21 rotates, and the lowest sieve plate 22 is driven to perform horizontal reciprocating motion in the carrying box 10 through the driving rod 24. Slide blocks 12 are arranged on both sides of the sieve plate 22, and corresponding slide grooves 11 are opened on both sides of the inner wall of the carrying box 10 for the slide blocks 12 to slide therein.

[0047] In some embodiments, a turntable 21 is provided on one side of each layer of sieve plate 22, and gear teeth are provided on the outer wall of each turntable 21. The two adjacent turntables 21 are meshed with each other. When the motor 20 is started, all the turntables are driven to rotate through the lowest turntable, and then the sieve plates 22 are driven to perform horizontal reciprocating motion, so as to sieve the powder on the corresponding sieve plate 22 to avoid accumulation of powder, resulting in blockage of the sieve holes and affecting the falling of the powder.

[0048] In some embodiments, the sieve holes of each layer of sieve plates 22 are of different sizes, and the distance between the center of the top turntable 21 and the connection between the driving rod 24 and the turntable 21 is the largest, and the distance decreases from top to bottom, that is, when the output power of the motor 20 remains unchanged, the horizontal reciprocating motion distance of the top sieve plate 22 is the largest. For the powder on the top sieve plate 22, the shaking frequency is relatively small, which is sufficient to shake the large-particle powder and avoid the large-particle powder clogging the sieve holes. As the distance decreases, the shaking frequency received by the bottom sieve plate 22 is the largest. By quickly shaking the bottom sieve plate 22, the small-particle powder falling on it will be quickly shaken, thereby accelerating the falling of the powder with a particle size that meets the crushing requirements of the airflow mill, thereby improving work efficiency.

[0049] In some embodiments, the powder crushed by the air flow pulverizer is discharged through the discharge end of the air flow pulverizer. A conveying pipeline can be connected between the discharge end of the air flow pulverizer and the feed end of the cyclone separator arranged on one side thereof to introduce the powder crushed by the air flow pulverizer into the cyclone separator. At this time, the cyclone separator is started to sort the crushed powder, and the particles with larger particle size after crushing are screened out. The remaining small particle size powder that meets the recycling standard is discharged from the discharge end of the cyclone separator, and finally a small particle size powder with a relatively concentrated particle size ratio is obtained.

[0050] In summary, by providing a carrying mechanism, the powder to be crushed is poured into the carrying mechanism for temporary storage, and then the screening mechanism is started to screen the temporarily stored powder, select the powder suitable for crushing by the airflow pulverizer, intercept the powder with large particle size, improve the working efficiency of the airflow pulverizer, and extend its working life.

[0051] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0054] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0055] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0056] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A powder screening device for a jet mill, characterized in that: include: The bearing mechanism is arranged on one side of the airflow pulverizer; in The bearing mechanism comprises a bearing box, the upper end surface of which is provided with a feed inlet, and the lower end surface of which is provided with a discharge outlet; and A screening mechanism is provided inside the carrying box, and the screening mechanism is suitable for screening the powder inside the carrying box.

2. The powder screening device for a jet mill according to claim 1, characterized in that: The screening mechanism comprises: a plurality of screen plates; Each of the sieve plates is vertically arranged, and each sieve plate is provided with sieve holes; and The diameter of each sieve hole gradually decreases from top to bottom.

3. The powder screening device for a jet mill according to claim 2, characterized in that: A driving assembly is provided on one side of each sieve plate; The drive assembly comprises: A turntable, one end surface of which is connected to a driving rod by a bearing; A connecting piece is arranged at one end of the sieve plate; wherein The other end of the driving rod is connected to the connecting member bearing.

4. The powder screening device for a jet mill according to claim 3, characterized in that: The distance between the connection point between each driving rod and each rotating disk and the center of the corresponding rotating disk increases from top to bottom.

5. The powder screening device for a jet mill according to claim 4, characterized in that: A motor is arranged on one side of the end surface of the bottom sieve plate away from the driving rod; The output end of the motor is connected to the lowermost sieve plate.

6. The powder screening device for a jet mill according to claim 5, characterized in that: The outer wall of each sieve plate is provided with gear teeth; The gear teeth on the outer walls of every two adjacent sieve plates mesh with each other.

7. The powder screening device for a jet mill according to claim 6, characterized in that: A plurality of slide grooves are provided on the inner wall of the carrying box; and Each of the sieve plates is provided with a sliding block on its outer side; Each of the sliding blocks corresponds to each of the sliding grooves.

8. The powder screening device for a jet mill according to claim 7, characterized in that: A cyclone separator is provided on one side of the airflow pulverizer; The discharge end of the air flow pulverizer is connected to the feed end of the cyclone separator.

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