Chemical powder agent jet mill

Abstract

The utility model discloses a chemical powder medicament airflow pulverizer relates to airflow pulverizing technical field, this chemical powder medicament airflow pulverizer, including jar body, the one side of jar body is provided with venturi nozzle, and the lower end of jar body is surrounded annular array with a plurality of lavall nozzle, the utility model, the core structure of venturi nozzle is the pipeline design of "contraction - throat - expansion", and airflow and material are fully mixed in expansion section, and form gas -solid two -phase flow, and with airflow is stably transported to jar body, can realize the continuous, even supply of material, avoid the material pollution or jam of mechanical contact, especially suitable for fine powder, light powder and small chemical medicament of viscosity, the supersonic airflow of lavall nozzle can improve the crushing efficiency significantly, makes chemical powder particle to take place violent collision, impact, shearing in the crushing jar, thereby realizes superfine crushing, shortens the crushing time, especially suitable for high hardness chemical medicament, has better crushing effect.

Description

Technical Field

[0001] This utility model specifically relates to the field of airflow pulverization technology, and more specifically to an airflow pulverizer for chemical powders and pharmaceuticals. Background Technology

[0002] A chemical powder pulverizer is a device that uses the kinetic energy of a high-speed airflow (usually compressed air, inert gas, etc.) to pulverize chemical powders into ultrafine particles. It is widely used in pharmaceuticals, chemicals and other fields, and is especially suitable for the ultrafine processing of heat-sensitive, low-melting-point, high-hardness, flammable, explosive or toxic chemical powders.

[0003] Chemical powders are carried into the pulverizing chamber by a high-speed airflow, where they gain extremely high kinetic energy.

[0004] Existing air jet mills feed material directly from the top, and the added material falls into the grinding tank in a concentrated manner, resulting in powder accumulation at the bottom. Furthermore, manual addition of material is required to achieve a continuous and uniform supply of material. Utility Model Content

[0005] The purpose of this invention is to provide a chemical powder pulverizer, in which the airflow and material are fully mixed to form a gas-solid two-phase flow, which is then stably transported into the pulverizing tank by the airflow, thereby solving the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A chemical powder pharmaceutical air jet mill, comprising

[0008] The container body, used for crushing chemical powders, has a Venturi nozzle installed in the middle of one side. The Venturi nozzle is designed with a 30-35 degree angle and the opening of the Venturi nozzle faces the bottom inside the container body.

[0009] The lower end of the tank has a ring array of multiple Laval nozzles, which are embedded in the tank and are set at an angle of 30-45 degrees; the openings of the Laval nozzles face upward.

[0010] Multiple Laval nozzles are connected to the intake ring, which is also connected to an airflow pipe; the airflow pipe is connected to the air source and is connected in series with a second solenoid valve.

[0011] A filter screen is fixed to the upper side of the inside of the tank;

[0012] A material extraction pipe is also connected to one side of the upper end of the tank via a flange.

[0013] As a further technical solution of this utility model, the bottom of the tank is connected to a bottom air pipe via a flange, and the bottom air pipe is connected to an air source.

[0014] As a further technical solution of this utility model, the end of the Venturi nozzle away from the tank is connected to the feeding air pipe; the feeding air pipe is connected to the compressed air source, and a first solenoid valve is also connected in series on the feeding air pipe.

[0015] The Venturi nozzle has another port connected to a feed valve.

[0016] As a further technical solution of this utility model, the feeding valve is connected to the end of the screw feeder; the screw feeder is installed below the storage tank; and the screw feeder is fixed to the top of the frame by a support.

[0017] The storage tank is fixed to the top of the machine frame by a mounting bracket.

[0018] As a further technical solution of this utility model, the extraction pipe is connected in conjunction with the feeding fan, and a feeding pipe is connected to the discharge end of the feeding fan; the feeding pipe is connected to the powder tank.

[0019] As a further technical solution of this utility model, an industrial control computer is also fixed on the frame; the screw feeder, the first solenoid valve and the second solenoid valve are electrically connected to the industrial control computer.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. In this utility model, chemical powder that needs to be pulverized by airflow is stored in a storage tank. When in use, the discharge valve is opened and the chemical powder is conveyed to the Venturi nozzle by a screw feeder. At the same time, the first solenoid valve is opened and compressed air will drive the chemical powder to be sprayed into the tank.

[0022] 2. The core structure of the Venturi nozzle of this utility model is a "contraction-throat-expansion" pipe design. In the expansion section, the airflow and material are fully mixed to form a gas-solid two-phase flow, which is stably transported into the tank by the airflow. It can realize the continuous and uniform supply of materials and avoid material contamination or blockage caused by mechanical contact. It is especially suitable for fine powder, light powder and chemical agents with low viscosity.

[0023] 3. In this invention, the supersonic airflow of the Laval nozzle can significantly improve the pulverization efficiency, causing chemical powder particles to undergo violent collisions, impacts, and shearing within the pulverizing chamber, thereby achieving ultrafine pulverization. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0025] Figure 2 This utility model Figure 1 The main view.

[0026] Figure 3 This utility model Figure 1 A schematic diagram of the rear structure.

[0027] Figure 4 This utility model Figure 1 The left view.

[0028] Figure 5 This utility model Figure 4 AA sectional view.

[0029] In the diagram: 1-Tank body, 2-Venturi nozzle, 3-Feeding air pipe, 4-First solenoid valve, 5-Discharge valve, 6-Screw feeder, 7-Support, 8-Filter screen, 9-Laval nozzle, 10-Inlet ring, 11-Air flow pipe, 12-Second solenoid valve, 13-Bottom air pipe, 14-Extraction pipe, 15-Feeding fan, 16-Feeding pipe, 17-Frame, 18-Storage tank, 19-Industrial control computer, 20-Mounting bracket. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-5 In this embodiment of the present invention, a chemical powder medicine airflow pulverizer includes a tank body 1. A Venturi nozzle 2 is installed at the middle position on one side of the tank body 1 for pulverizing chemical powder medicine. The Venturi nozzle 2 is designed with a 30-35 degree included angle, and the opening of the Venturi nozzle 2 faces the bottom inside the tank body 1.

[0032] Multiple Laval nozzles 9 are arranged in a ring around the lower end of the tank body 1, and the multiple Laval nozzles 9 are embedded in the tank body 1. The Laval nozzles 9 are inclined at 30-45 degrees and the openings of the Laval nozzles 9 face upward.

[0033] Multiple Laval nozzles 9 are connected to an air intake ring 10, and the air intake ring 10 is also connected to an airflow pipe 11; the airflow pipe 11 is connected to an air source and is connected in series with a second solenoid valve 12; a filter screen 8 is fixed on the upper side inside the tank body 1; a material extraction pipe 14 is also connected to one side of the upper end of the tank body 1 through a flange.

[0034] More specifically, the discharge valve 5 is connected to the end of the screw feeder 6; the screw feeder 6 is installed below the storage tank 18; and the screw feeder 6 is fixed to the top of the frame 17 by the support 7.

[0035] The storage tank 18 is fixed to the top of the frame 17 by the mounting bracket 20.

[0036] By adopting the above technical solution, the chemical powder that needs to be air-jet pulverized is stored in the storage tank 18. When in use, the discharge valve 5 is opened and the chemical powder is transported to the Venturi nozzle 2 by the screw feeder 6. At the same time, the first solenoid valve 4 is opened and the compressed air will drive the chemical powder to be sprayed into the tank 1.

[0037] The end of the Venturi nozzle 2 away from the tank body 1 is connected to the feeding air pipe 3; the feeding air pipe 3 is connected to a compressed air source, and a first solenoid valve 4 is also connected in series on the feeding air pipe 3; the other interface of the Venturi nozzle 2 is connected to a discharge valve 5.

[0038] The core structure of a Venturi nozzle is a "contraction-throat-expansion" pipe design. When a high-speed airflow passes through the nozzle, the constriction section increases the airflow speed, and the throat forms a low-pressure area (Bernoulli effect), which generates a strong suction effect and can automatically draw chemical powders and agents from the hopper into the nozzle.

[0039] In the expansion section, the airflow and material are fully mixed to form a gas-solid two-phase flow, which is stably transported into tank 1 by the airflow; this can achieve continuous and uniform supply of materials, avoiding material contamination or blockage caused by mechanical contact, and is especially suitable for fine powder, light powder and chemical agents with low viscosity.

[0040] After the second solenoid valve 12 is opened, the compressed air, after being dried, enters the intake ring 10 through the airflow pipe 11, and then disperses into each Laval nozzle 9. The unique "contraction-throat-expansion" structure of the Laval nozzle can convert the pressure energy of the compressed gas (such as compressed air, nitrogen, etc.) into kinetic energy. The gas accelerates to the speed of sound in the contraction section and continues to expand and accelerate in the expansion section, eventually forming a supersonic airflow (the flow velocity can reach 300-1200m / s, far exceeding the subsonic speed of ordinary nozzles). When this high-speed airflow carries powder particles, it can give the particles a great deal of kinetic energy (kinetic energy is proportional to the square of the velocity), causing the chemical powder particles to undergo violent collisions, impacts, and shearing (between particles, between particles and between particles and the can wall / filter screen) in the pulverizing tank, thereby achieving ultrafine pulverization (the powder can be refined to the micron or even nanometer level).

[0041] Compared to ordinary nozzles, the supersonic airflow of Laval nozzles can significantly improve pulverization efficiency and shorten pulverization time, making them especially suitable for high-hardness chemical agents.

[0042] In this embodiment, the bottom of the tank 1 is connected to a bottom air pipe 13 via a flange, and the bottom air pipe 13 is connected to an air source.

[0043] After gas is introduced into the bottom air pipe 13, it has an upward blowing force on the chemical powder, preventing the powder from agglomerating downwards.

[0044] In this embodiment, the extraction pipe 14 is connected to the feeding fan 15, and a feeding pipe 16 is connected to the discharge end of the feeding fan 15; the feeding pipe 16 is connected to the powder tank.

[0045] The properly pulverized powder will pass through the filter screen 8 and be drawn out by the negative pressure of the feeding fan 15. The powder will then be transported to the collection tank through the extraction pipe 14, the feeding fan 15 and the feeding pipe 16 in sequence, thus realizing the storage of the properly pulverized powder.

[0046] In this embodiment, an industrial control computer 19 is also fixed on the frame 17; the screw feeder 6, the first solenoid valve 4, and the second solenoid valve 12 are electrically connected to the industrial control computer 19.

[0047] The working principle of this utility model is as follows: the chemical powder that needs to be air-jet pulverized is stored in the storage tank 18. When in use, the feeding valve 5 is opened and the chemical powder is transported to the Venturi nozzle 2 by the screw feeder 6. At the same time, the first solenoid valve 4 is opened and the compressed air will drive the chemical powder to be sprayed into the tank 1.

[0048] After the second solenoid valve 12 is opened, the compressed air, after being dried, enters the intake ring 10 through the airflow pipe 11, and then disperses into each Laval nozzle 9. The unique "contraction-throat-expansion" structure of the Laval nozzle can convert the pressure energy of compressed gas (such as compressed air, nitrogen, etc.) into kinetic energy. The gas accelerates to the speed of sound in the contraction section and continues to expand and accelerate in the expansion section, eventually forming a supersonic airflow. When this high-speed airflow carries powder particles, it can give the particles great kinetic energy, causing the chemical powder particles to undergo violent collisions, impacts, and shearing in the pulverizing tank, thereby achieving ultrafine pulverization.

[0049] The properly pulverized powder will pass through the filter screen 8 and be drawn out by the negative pressure of the feeding fan 15. The powder will then be transported to the collection tank through the extraction pipe 14, the feeding fan 15 and the feeding pipe 16 in sequence, thus realizing the storage of the properly pulverized powder.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A chemical powder pulverizer, characterized in that: include The can body (1) is used for crushing chemical powders. A Venturi nozzle (2) is installed in the middle of one side of the can body (1). The Venturi nozzle (2) is designed with a 30-35 degree angle and the opening of the Venturi nozzle (2) faces the bottom inside the can body (1). The lower end of the tank (1) has a ring array of multiple Laval nozzles (9), and the multiple Laval nozzles (9) are embedded in the tank (1). The Laval nozzles (9) are set at an angle of 30-45 degrees; the opening of the Laval nozzles (9) faces upward. Multiple Laval nozzles (9) are connected to an intake ring (10), and the intake ring (10) is also connected to an airflow pipe (11); the airflow pipe (11) is connected to an air source and is connected in series with a second solenoid valve (12); A filter screen (8) is fixed on the upper side inside the tank (1); The upper side of the tank (1) is also connected to a material extraction pipe (14) via a flange.

2. The chemical powder pulverizer according to claim 1, characterized in that: The bottom of the tank (1) is connected to a bottom air pipe (13) via a flange, and the bottom air pipe (13) is connected to an air source.

3. The chemical powder pulverizer according to claim 1, characterized in that: The end of the Venturi nozzle (2) away from the tank body (1) is connected to the feeding air pipe (3); the feeding air pipe (3) is connected to the compressed air source, and a first solenoid valve (4) is also connected in series on the feeding air pipe (3); The Venturi nozzle (2) has another port connected to a feed valve (5).

4. The chemical powder pulverizer according to claim 3, characterized in that: The discharge valve (5) is connected to the end of the screw feeder (6); the screw feeder (6) is installed below the storage tank (18); the screw feeder (6) is fixed to the top of the frame body (17) by the support (7); The storage tank (18) is fixed to the top of the frame body (17) by the mounting bracket (20).

5. The chemical powder pulverizer according to claim 1, characterized in that: The extraction pipe (14) is connected to the feeding fan (15), and a feeding pipe (16) is connected to the discharge end of the feeding fan (15); the feeding pipe (16) is connected to the powder tank.

6. The chemical powder pulverizer according to claim 4, characterized in that: An industrial control computer (19) is also fixed on the frame body (17); the screw feeder (6), the first solenoid valve (4) and the second solenoid valve (12) are electrically connected to the industrial control computer (19).

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