Powder crushing device for jet mill

Abstract

The utility model belongs to the technical field of jet mill, and particularly relates to a powder crushing device for a jet mill, which comprises a feeding mechanism arranged above the jet mill and connected with a feeding piece arranged at the top end of the jet mill; the feeding mechanism comprises a screening barrel and a feeding port, the screening barrel is located above the feeding piece, and the feeding port is formed in the upper portion of the screening barrel. A plurality of screening holes are formed in the outer wall of the screening barrel; the driving assembly is connected with the screening barrel and is suitable for grinding powder which penetrates through the feeding opening, enters the screening barrel and cannot penetrate through the screening holes; the air blowing assembly is connected with the driving assembly and is suitable for blowing air into the sieving barrel in the process that the driving assembly grinds the powder so as to prevent the powder from caking; and by arranging the blowing assembly, in the pre-crushing process of the powder, the blowing assembly is adopted to blow air into the screening barrel, and the pre-crushed powder is prevented from being accumulated in the screening barrel.

Description

Technical Field

[0001] The utility model belongs to the technical field of airflow pulverization, and in particular relates to a powder material crushing device for an airflow pulverizer. 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] In order to extend the service life of the air flow pulverizer, in the prior art, the powder to be pulverized is generally pre-crushed before the air flow pulverizer is used to crush the powder, so as to reduce the working pressure of the air flow pulverizer during the powder crushing process. However, the existing powder crushing device, after pre-crushing the powder, mostly relies on the powder's own weight to make it fall into the air flow pulverizer. As the working time increases, powder will accumulate inside.

[0004] Therefore, a powder crushing device for a jet mill is designed to solve the technical problem of powder accumulation in the powder crushing process in the prior art. Utility Model Content

[0005] The utility model aims to provide a powder crushing 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 crushing device for an air flow mill, comprising:

[0007] The feeding mechanism is arranged above the airflow pulverizer and connected to the feeding member arranged at the top of the airflow pulverizer;

[0008] The feeding mechanism comprises a screening cylinder, the screening cylinder is located above the feeding member, and a feeding port is opened above the screening cylinder; wherein

[0009] A plurality of sieve holes are provided on the outer wall of the sieve cylinder; and

[0010] A driving assembly is connected to the screening cylinder and is suitable for grinding the powder that enters the screening cylinder through the feed inlet and cannot pass through the sieve holes;

[0011] The air blowing assembly is connected to the driving assembly and is suitable for blowing air toward the screening cylinder during the process of the driving assembly grinding the powder material to prevent the powder material from agglomerating.

[0012] Further, the driving assembly comprises:

[0013] The motor is arranged on one side of the screening cylinder; wherein

[0014] The output end of the motor is connected to a rotating disk; and

[0015] The interior of the screening cylinder is slidably connected with a grinding element;

[0016] The grinding element is connected to the rotating disk via a connecting unit.

[0017] Further, the connecting unit comprises:

[0018] A screw rod, one end of which is connected to the grinding element, and the other end of which passes through the screen cylinder and is connected to the slider; and

[0019] A connecting rod has one end connected to the slider and the other end connected to one side of the turntable.

[0020] Furthermore, the screw rod is connected to the screening cylinder via threads.

[0021] Further, the blowing assembly comprises:

[0022] An air cylinder disposed on one side of the screening cylinder; and

[0023] A push plate, located inside the gas cylinder and slidably connected to the gas cylinder;

[0024] An air outlet pipe, one end of which is connected to the air cylinder and the other end of which is connected to the screening cylinder; and

[0025] A push rod has one end connected to the slider and the other end passes through the air cylinder and is connected to the push plate.

[0026] Furthermore, an air inlet pipe is provided on the outer wall of the air cylinder;

[0027] A one-way valve is arranged inside the air intake pipe.

[0028] The beneficial effect of the utility model is that the utility model is provided with a driving component to pre-crush the powder entering the screening cylinder to reduce the working pressure of the subsequent air flow pulverizer, and in the process of pre-crushing the powder, a blowing component is used to blow air into the screening cylinder to avoid the accumulation of pre-crushed powder in the screening cylinder.

[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 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0033] Figure 2 It is a three-dimensional structural schematic diagram of the driving mechanism of the utility model;

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

[0035] Figure 4 It is a three-dimensional structural schematic diagram of the blowing mechanism of the utility model;

[0036] Figure 5 It is a schematic cross-sectional structural diagram of the blowing mechanism of the utility model.

[0037] In the figure:

[0038] 1. Driving assembly; 10. Motor; 11. Turntable; 12. Connecting rod; 13. Sliding block; 14. Screw rod; 15. Screen cylinder; 16. Feed inlet; 17. Screen hole; 18. Grinding part;

[0039] 2. Airflow pulverizer; 20. Feeding parts;

[0040] 3. Blowing assembly; 30. Push rod; 31. Air cylinder; 32. Push plate; 33. Air outlet pipe; 34. Air inlet pipe. 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] In order to extend the service life of the air flow pulverizer, in the prior art, the powder to be pulverized is generally pre-crushed before the air flow pulverizer is used to crush the powder, so as to reduce the working pressure of the air flow pulverizer during the powder crushing process. However, the existing powder crushing device, after pre-crushing the powder, mostly relies on the powder's own weight to make it fall into the air flow pulverizer. As the working time increases, powder will accumulate inside.

[0043] To solve the above technical problems, in at least one embodiment, a powder crushing device for an air flow pulverizer is provided, comprising: a feeding mechanism, which is arranged above the air flow pulverizer 2 and connected to a feeding piece 21 arranged at the top of the air flow pulverizer 2; the feeding mechanism comprises a screening cylinder 15, the screening cylinder 15 is located above the feeding piece 21, and a feeding port 16 opened above the screening cylinder 15; wherein a plurality of sieve holes 17 are opened on the outer wall of the screening cylinder 15; and a driving component 1, which is connected to the screening cylinder 15 and is suitable for grinding powder that passes through the feeding port 16 and enters the screening cylinder 15 and cannot pass through the sieve holes 17; a blowing component 3, which is connected to the driving component and is suitable for blowing air toward the screening cylinder 15 during the process of grinding the powder by the driving component to avoid agglomeration of the powder.

[0044] By providing a driving component, the powder entering the screening cylinder is pre-crushed to reduce the working pressure of the subsequent air flow pulverizer, and during the pre-crushing of the powder, the blowing component is used to blow air into the screening cylinder to avoid the accumulation of the pre-crushed powder in the screening cylinder.

[0045] In some embodiments, the powder to be crushed is fed from the feed port 16 and enters the screening cylinder 15. Figures 2 to 3 As shown, a plurality of sieve holes 17 are provided on the outer wall of the screening cylinder 15, and the sieve holes 17 face the direction of the feed piece 20 of the air flow mill 2, and the powder entering the screening cylinder 15 falls on the sieve holes 17, and some powders that meet the normal crushing diameter of the air flow mill 2 directly pass through the sieve holes 17 and enter the air flow mill 2, while some powders with larger diameters will be intercepted in the screening cylinder 15 for pre-crushing to relieve the working pressure of the air flow mill 2.

[0046] In some embodiments, the motor 10 is started, and its output end drives the turntable 11 to rotate. One end of the connecting rod 12 is connected to the surface bearing of the turntable 11, and the other end is connected to the surface bearing of the slider 13. Therefore, during the rotation of the turntable 11, the slider 13 and the screw rod 14 connected to the bearing of the slider 13 are driven to reciprocate by the connecting rod 12, and the other end of the screw rod 14 passes through the screening cylinder 15 and is threadedly connected to the screening cylinder 15. Therefore, the screw rod 14 drives the grinding member 18 to rotate and reciprocate in the screening cylinder 15. When the grinding member 18 rotates in the screening cylinder 15 and moves to the other end of the screening cylinder 15, the powder is located between one end of the inner wall of the screening cylinder 15 and the grinding member 18. The large-size powder particles remaining in the screening cylinder 15 are ground by the grinding member 18, that is, pre-crushed. The crushed powder can pass through the sieve hole 17 and enter the air flow mill 2.

[0047] In some embodiments, Figure 3 to Figure 4 As shown, during the sliding process, the slider 13 drives the push rod 30 connected thereto to move, and one end of the push rod 30 passes through the air cylinder 31 and is connected to the push plate 32, thereby driving the push plate 32 to slide in the air cylinder 31, and the air in the air cylinder 31 is discharged into the sieve cylinder 15 through the air outlet pipe 33. The air outlet end of the air outlet pipe 33 is in contact with the inner wall of the sieve cylinder 15 to avoid affecting the movement of the grinding member 18. The gas discharged from the air outlet end of the air outlet pipe 33 blows away the powder ground by the grinding member 18 to avoid the ground powder remaining in the dead corner that the grinding member 18 cannot reach, resulting in powder accumulation.

[0048] In summary, by providing a driving component, the powder entering the screening cylinder is pre-crushed to reduce the working pressure of the subsequent air flow pulverizer, and in the process of pre-crushing the powder, the blowing component is used to blow air into the screening cylinder to avoid the accumulation of pre-crushed powder in the screening cylinder.

[0049] 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.

[0050] 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.

[0051] 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 crushing device for a jet mill, characterized in that: include: The feeding mechanism is arranged above the airflow pulverizer and connected to the feeding member arranged at the top of the airflow pulverizer; The feeding mechanism comprises a screening cylinder, the screening cylinder is located above the feeding member, and a feeding port is opened above the screening cylinder; in A plurality of sieve holes are provided on the outer wall of the sieve cylinder; and A driving assembly is connected to the screening cylinder and is suitable for grinding the powder that enters the screening cylinder through the feed inlet and cannot pass through the sieve holes; The air blowing assembly is connected to the driving assembly and is suitable for blowing air toward the screening cylinder during the process of the driving assembly grinding the powder material to prevent the powder material from agglomerating.

2. The powder crushing device for air flow mill according to claim 1, characterized in that: The drive assembly comprises: The motor is arranged on one side of the screening cylinder; wherein The output end of the motor is connected to a rotating disk; and The interior of the screening cylinder is slidably connected with a grinding element; The grinding element is connected to the rotating disk via a connecting unit.

3. The powder crushing device for air flow mill according to claim 2, characterized in that: The connecting unit comprises: A screw rod, one end of which is connected to the grinding element, and the other end of which passes through the screen cylinder and is connected to the slider; and A connecting rod has one end connected to the slider and the other end connected to one side of the turntable.

4. The powder crushing device for air flow mill according to claim 3, characterized in that: The screw rod is connected to the screening cylinder via threads.

5. The powder crushing device for air flow mill according to claim 4, characterized in that: The blowing assembly comprises: An air cylinder disposed on one side of the screening cylinder; and A push plate, located inside the gas cylinder and slidably connected to the gas cylinder; An air outlet pipe, one end of which is connected to the air cylinder and the other end of which is connected to the screening cylinder; and A push rod has one end connected to the slider and the other end passes through the air cylinder and is connected to the push plate.

6. The powder crushing device for air flow mill according to claim 5, characterized in that: An air inlet pipe is arranged on the outer wall of the air cylinder; A one-way valve is arranged inside the air intake pipe.

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