CN219631537U

CN219631537U - Novel jet mill

Info

Publication number: CN219631537U
Application number: CN202320696826.0U
Authority: CN
Inventors: 曲永战; 张惠; 孙雪梅; 魏佳; 李文博; 申云凤; 张烨
Original assignee: Shijiazhuang Kairuide Pharmaceutical Technology Development Co ltd
Current assignee: Shijiazhuang Kairuide Pharmaceutical Technology Development Co ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-09-05
Anticipated expiration: 2033-03-31

Abstract

The utility model provides a novel jet mill, which comprises a mill tank, a mill assembly, a material guide pipe, a main screening device and a standby screening device, wherein the mill tank is respectively provided with a feed inlet and a discharge outlet, and the feed inlet is communicated with a storage box; the crushing assembly is arranged in the crushing tank and is used for introducing a plurality of strands of compressed gas into the crushing tank; the material guiding pipe is connected to the discharge port and comprises a main pipe, a first branch pipe and a second branch pipe which are connected in parallel with the main pipe, the main pipe is connected to the discharge port, and the first branch pipe and the second branch pipe are respectively provided with a switch valve; the main screening device is connected with the first branch pipe; the standby screening device is connected with the second branch pipe; the main pipe, the first branch pipe and the main screen form a first screening line. The utility model provides a novel jet mill device, which aims to solve the problems that a screen in a classifier in the prior art is easy to adhere to materials in the long-term use process, so that the screen is taken out for replacement or cleaning after the classifier is stopped, and the normal efficiency is low.

Description

Novel jet mill

Technical Field

The utility model belongs to the technical field of material crushing, and particularly relates to a novel jet mill.

Background

The jet mill is characterized in that compressed air is filtered and dried, then is sprayed into a crushing cavity at a high speed through a Laval nozzle, materials are repeatedly collided, rubbed and sheared at the junction of a plurality of high-pressure air flows to be crushed, the crushed materials move to a classification area along with ascending air flows under the pumping action of a fan, coarse and fine materials are separated under the action of strong centrifugal force generated by a classification turbine rotating at a high speed, fine particles meeting the granularity requirement enter a cyclone separator and a dust remover through a classification wheel to be collected, and coarse particles descend to the crushing area to be crushed continuously. A plurality of screens with different mesh numbers are generally arranged in the classifying area, so that materials with different particle sizes are separated. However, when the medicine is crushed, on one hand, the required crushed particle size of the medicine is smaller, and on the other hand, part of the medicine has certain humidity and strong adhesion, and after long-term use, a certain amount of medicine particles or powder are easily adhered on the screen, so that the screening effect is influenced. At this time, the screen in the equipment needs to be taken out for replacement or cleaning, but the operation of the jet mill is stopped when the screen is taken out, so that the normal production operation is affected.

Disclosure of Invention

The utility model aims to provide a novel jet mill, which aims to solve the problems that a screen in a classifier in the prior art is easy to adhere to materials in a long-term use process, so that the screen is taken out for replacement or cleaning after the classifier is stopped, and the normal efficiency is low.

In order to achieve the above purpose, the utility model adopts the following technical scheme: provided is a novel jet mill comprising:

the crushing tank is provided with a feed inlet and a discharge outlet respectively, and the feed inlet is communicated with the storage box;

the crushing assembly is arranged in the crushing tank and is used for introducing a plurality of compressed gases into the crushing tank;

the material guiding pipe is connected to the discharge port and comprises a main pipe, a first branch pipe and a second branch pipe which are connected in parallel with the main pipe, the main pipe is connected to the discharge port, and switching valves are respectively arranged on the first branch pipe and the second branch pipe;

a main screener connected to the first branch pipe; and

a backup screen connected to the second branch pipe;

the main pipe, the first branch pipe and the main screening device form a first screening line; the main pipe, the second branch pipe and the standby screen form a second screening line; during normal operation, material flows along the first screening line, and during maintenance of the primary screen, material flows along the second screening line.

In one possible implementation, the primary and backup screens each include:

the screening box body is communicated with the first branch pipe or the second branch pipe, a plurality of installation openings are formed in the screening box body, the installation openings are sequentially arranged at intervals along the conveying direction of materials, and the installation openings are used for communicating the inside of the screening box body with the outside; and

the screening assembly is inserted into the installation opening, the inserting direction of the screening assembly is perpendicular to the conveying direction, the joint of the screening assembly and the installation opening is sealed, screening holes are formed in the screening assembly, and the screening holes in the screening assembly are gradually reduced along the conveying direction.

In one possible implementation, the screen assembly includes:

the mounting frame is spliced with the mounting opening, and a through mounting hole is formed in the middle of the mounting frame; and

and the screening net is laid in the mounting hole and is connected with the mounting frame.

In one possible implementation, the main and stand-by screens further include a plurality of discharge hoppers in communication with the screen boxes, respectively, the discharge hoppers being disposed in one-to-one correspondence with the screen assemblies and the discharge hoppers being located upstream of the screen assemblies.

In one possible implementation manner, the screening box is provided with a slot adapted to the screening assembly, the slot is arranged corresponding to the mounting opening, and the slot is used for limiting the screening assembly in the conveying direction.

In one possible implementation, the pulverizing assembly includes:

the conveying pipes are annularly distributed in the crushing tank around the axis of the crushing tank and are connected with an air source; and

the nozzles are respectively connected to the inner peripheral surface of the conveying pipe, the nozzles are arranged at an included angle with the normal line of the conveying pipe, and the included angles of the nozzles and the normal line of the conveying pipe are the same.

In one possible implementation manner, the crushing assembly further comprises a crushing cylinder arranged in the crushing tank, the crushing cylinder and the conveying pipe are coaxially arranged, and a plurality of conical teeth are uniformly arranged on the outer peripheral surface of the crushing cylinder.

In a possible implementation manner, the novel jet mill device further comprises a cutting assembly arranged in the mill tank, the cutting assembly is located at the upstream of the mill assembly along the feeding direction, the cutting assembly is used for primarily crushing and cutting materials, a separation plate is arranged between the cutting assembly and the mill assembly, and a material penetrating hole is formed in the separation plate.

In one possible implementation, the cutting assembly includes:

the driving shaft is arranged in the crushing tank, and the axis of the driving shaft is parallel to the axis of the crushing tank;

a cutter connected to the drive shaft;

the driver is arranged on the outer wall of the crushing tank;

one end of the transmission shaft is connected with the driver, the other end of the transmission shaft is inserted into the crushing tank, and the axis of the transmission shaft is perpendicular to the axis of the crushing tank;

the first transmission gear is coaxially connected with the insertion end of the transmission shaft; and

and the second transmission gear is meshed with the first transmission gear and is connected with the end part of the driving shaft.

In one possible implementation manner, the cutting assembly further comprises a limiting cylinder arranged outside the cutting knife, the limiting cylinder is connected with the crushing tank and is arranged corresponding to the feeding port, and a protrusion is arranged on the inner wall of the limiting cylinder.

The novel jet mill provided by the utility model has the beneficial effects that: compared with the prior art, when the novel jet mill device is in normal operation, materials enter the mill tank from the feed inlet, compressed air flow is introduced into the mill tank by the mill assembly, the materials are crushed under the action of the compressed air flow and then conveyed along the first screening line, and the main screening device screens the crushed materials according to the particle size of the crushed materials. After a period of use, the screening piece in the main screening ware adheres to certain material, influences screening efficiency, and the first screening circuit of stopping at this moment, the second screening circuit of starting. According to the scheme, when the main screening device is cleaned and maintained, the standby screening device can be started, so that normal grinding work is ensured, and the production efficiency is not affected.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural diagram of a novel jet mill according to an embodiment of the present utility model;

FIG. 2 is a top view of a primary screen and a backup screen employed in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a primary screen according to a second embodiment of the present utility model;

FIG. 4 is a side cross-sectional view of a primary screen and screen assembly employed in accordance with a third embodiment of the present utility model;

FIG. 5 is a side cross-sectional view of a primary screen employed in accordance with a third embodiment of the present utility model;

FIG. 6 is a front cross-sectional view of a pulverizing tank employed in accordance with a fourth embodiment of the present utility model;

FIG. 7 is a top view of a fifth embodiment of the present utility model;

fig. 8 is a cross-sectional view of a cutting assembly employed in accordance with a sixth embodiment of the present utility model.

In the figure:

1. a pulverizing tank; 101. a feed inlet; 102. a discharge port;

2. a main sifter; 201. a slot; 202. screening the box body;

3. a material guiding pipe; 301. a main pipe; 302. a first branch pipe; 303. a second branch pipe;

4. a spare sifter;

5. a screen assembly; 501. a mounting frame; 502. screening net;

6. a discharge hopper;

7. a cutting assembly; 701. a limiting cylinder; 7011. a protrusion; 702. a driver; 703. a transmission shaft; 704. a first transmission gear; 705. a second transmission gear; 706. a drive shaft; 707. a cutting knife;

8. a partition plate;

9. a crushing assembly; 901. a delivery tube; 902. a crushing cylinder; 9021. conical teeth; 903. and (3) a nozzle.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order. Unless otherwise indicated, the terms of orientation or position such as "vertical," "clockwise," "counterclockwise," and the like refer to an orientation or positional relationship based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the specific scope of protection of the present utility model. In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements. In the claims, specification and drawings of the present utility model, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

Referring to fig. 1 and 2 together, the novel jet mill provided by the present utility model will now be described. The novel jet mill comprises a mill tank 1, a mill assembly 9, a material guide pipe 3, a main screening device 2 and a standby screening device 4, wherein the mill tank 1 is provided with a feed inlet 101 and a discharge outlet 102 respectively, and the feed inlet 101 is communicated with a storage box; the crushing assembly 9 is arranged in the crushing tank 1, and the crushing assembly 9 is used for introducing a plurality of strands of compressed gas into the crushing tank 1; the material guiding pipe 3 is connected to the material outlet 102, the material guiding pipe 3 comprises a main pipe 301, a first branch pipe 302 and a second branch pipe 303 which are connected in parallel with the main pipe 301, the main pipe 301 is connected to the material outlet 102, and the first branch pipe 302 and the second branch pipe 303 are respectively provided with a switch valve; the main screen 2 is connected to a first branch pipe 302; the spare screen 4 is connected to the second branch 303; the main pipe 301, the first branch pipe 302 and the main screen 2 form a first screening line; the main pipe 301, the second branch pipe 303 and the spare screen 4 form a second screening line; during normal operation, material flows along the first screening line and during maintenance of the main screen 2, material flows along the second screening line.

Compared with the prior art, the novel jet milling device provided by the utility model has the advantages that during normal operation, materials enter the milling tank 1 from the feed inlet 101, compressed air flow is introduced into the milling tank 1 through the milling assembly 9, the materials are milled under the action of the compressed air flow, then the materials are conveyed along the first screening line, and the main screening device 2 screens the materials according to the particle size after milling. After a period of use, the screening elements in the main screening device 2 are attached with a certain amount of material, which affects the screening efficiency, and at this time the first screening circuit is deactivated and the second screening circuit is activated. According to the scheme, when the main screening device 2 is cleaned and maintained, the standby screening device 4 can be started, so that normal grinding work is ensured, and the production efficiency is not affected.

Specifically, the first branch pipe 302 and the second branch pipe 303 are provided with a switching valve and a transfer pump, respectively.

In some embodiments, referring to fig. 3 to 5, the main screening device 2 and the spare screening device 4 each include a screening box 202 and a plurality of screening assemblies 5, the screening box 202 is communicated with a first branch pipe 302 or a second branch pipe 303, a plurality of mounting openings are formed in the screening box 202, the plurality of mounting openings are sequentially arranged at intervals along the conveying direction of the materials, and the interior of the screening box 202 is communicated with the exterior by the mounting openings; the plurality of screening assemblies 5 are inserted in the installation opening, the inserting direction of the screening assemblies 5 is perpendicular to the conveying direction, the connection position of the screening assemblies 5 and the installation opening is sealed, screening holes are formed in the screening assemblies 5, and the screening holes in the plurality of screening assemblies 5 are gradually reduced along the conveying direction.

In this embodiment, screen assemblies 5 are plugged into screen housing 202, and screen assemblies 5 are conveniently taken and placed when the screen assemblies 5 need to be replaced or cleaned. In addition, the plugging direction of the screen assemblies 5 is perpendicular to the conveying direction, so that the screen assemblies 5 are prevented from being separated from the screening box 202 in the conveying process of materials. The multiple screening assemblies 5 arranged in sequence can screen materials with different particle sizes, so that the materials can be screened step by step according to the particle sizes.

In some embodiments, referring to fig. 4-5, screen assembly 5 includes a mounting frame 501 and a screen 502, where mounting frame 501 is plugged into a mounting opening, and a middle portion of mounting frame 501 has a mounting hole therethrough; the screen 502 is laid in the mounting holes and connected to the mounting frame 501.

After long-term use, if screen 502 is damaged, screen 502 may be replaced without the need to replace screen assembly 5 entirely, reducing costs. The mounting frame 501 is inserted into the mounting opening, so that the mounting frame is convenient to assemble and disassemble, and sealing strips can be arranged on the periphery of the mounting frame 501, so that the tightness between the mounting frame and the screening box 202 is improved.

In some embodiments, referring to FIG. 3, primary screen 2 and backup screen 4 each further include a plurality of discharge hoppers 6 in communication with screen housing 202, with discharge hoppers 6 being positioned in one-to-one correspondence with screen assemblies 5, and discharge hoppers 6 being positioned upstream of screen assemblies 5.

The material can be discharged from the screening box 202 by discharging, so that the material is prevented from accumulating in the screening box 202. The material is blocked upstream of the screen assemblies 5 and thus the discharge is arranged upstream of the screen assemblies 5 due to the discharge of the screened material.

Alternatively, the discharge hopper 6 may be located at the bottom of the screening box 202, at which time no external conveying equipment is required, and the material enters the discharge hopper 6 under the action of gravity. The discharge hopper 6 may also be arranged on the side wall of the screening box, and a pump is arranged at the discharge end of the discharge hopper 6, and the suction force of the pump sucks the material in the screening box into the discharge hopper 6.

Optionally, the discharging hopper 6 is connected with a storage tank, and a transport pump is arranged between the discharging hopper 6 and the storage tank for conveying.

In some embodiments, referring to fig. 4 to 5, a slot 201 adapted to the screening assembly 5 is formed in the screening box 202, the slot 201 is disposed corresponding to the mounting opening, and the slot 201 is used to limit the screening assembly 5 in the conveying direction.

Screen assemblies 5 are in mating engagement with slots 201 and limit screen assemblies 5 in the direction of conveyance, further increasing the stability of screen assemblies 5 and avoiding separation of screen assemblies 5 from screen housing 202 due to impact forces applied by screen assemblies 5 during conveyance of the material.

In some embodiments, referring to fig. 6-7, the pulverizing assembly 9 includes a delivery tube 901 and a plurality of nozzles 903, the delivery tube 901 being annularly distributed within the pulverizing tank 1 about an axis of the pulverizing tank 1, the delivery tube 901 being connected to a gas source; the nozzles 903 are connected to the inner peripheral surface of the duct 901, respectively, the nozzles 903 are disposed at an angle to the normal line of the duct 901, and the angles between the nozzles 903 and the normal line of the duct 901 are the same.

Compressed gas is sprayed outwards along the conveying pipe 901 through the nozzles 903, the nozzles 903 form included angles with the normal line of the conveying pipe 901, the included angles between the plurality of nozzles 903 and the normal line of the conveying pipe 901 are the same, and air flows sprayed by the plurality of nozzles 903 form rotational flows, so that materials are repeatedly collided, rubbed and sheared at the intersection of the air flows to be crushed.

In some embodiments, referring to fig. 6, the pulverizing assembly 9 further includes a pulverizing cylinder 902 disposed in the pulverizing tank 1, the pulverizing cylinder 902 is disposed coaxially with the conveying pipe 901, and the outer circumferential surface of the pulverizing cylinder 902 is uniformly provided with a plurality of tapered teeth 9021.

The air flow from the nozzle 903 causes the material to collide with each other and collide with the tapered teeth 9021 of the pulverizing cylinder 902 after the material is impacted on the pulverizing cylinder 902, thereby further increasing the pulverizing efficiency of the material. The pulverizing cylinder 902 is disposed at the center of the delivery pipe 901, and the center of the air flow ejected from the nozzles 903 is not weakened by the air flow force or the air flow force after the air flow is swirled, so that the impact on the pulverizing cylinder 902 is avoided, and the service life of the pulverizing cylinder 902 is ensured while pulverizing the material.

In some embodiments, referring to fig. 6, the novel jet mill device further includes a cutting assembly 7 disposed in the mill tank 1, the cutting assembly 7 is located upstream of the mill assembly 9 along the feeding direction, the cutting assembly 7 is used for primarily pulverizing and cutting materials, a separation plate 8 is disposed between the cutting assembly 7 and the mill assembly 9, and a material penetration hole is formed in the separation plate 8.

The material is firstly cut and cracked by the cutting assembly 7 after entering the crushing cylinder 902, and is crushed by the crushing assembly 9 after preliminary cracking, so that the crushing efficiency is improved, and the problem that the large-sized material is not thoroughly crushed by air flow is solved. In addition, the division plate 8 not only reduces the cutting resistance caused by the upward surge of air flow, but also can thoroughly cut the massive materials because the division plate 8 cannot be used for the material.

In some embodiments, referring to fig. 6, the cutting assembly 7 includes a drive shaft 706, a cutting blade 707, a driver 702, a drive shaft 703, a first drive gear 704, and a second drive gear 705, the drive shaft 706 being disposed within the milling drum 1, the axis of the drive shaft 706 being parallel to the axis of the milling drum 1; a cutter 707 is connected to the drive shaft 706; the driver 702 is arranged on the outer wall of the crushing tank 1; one end of a transmission shaft 703 is connected with the driver 702, the other end of the transmission shaft 703 is inserted into the crushing tank 1, and the axis of the transmission shaft 703 is perpendicular to the axis of the crushing tank 1; the first transmission gear 704 is coaxially connected to the insertion end of the transmission shaft 703; the second transfer gear 705 is meshed with the first transfer gear 704 and is connected to an end of the drive shaft 706.

The driver 702 controls the transmission shaft 703 to rotate, and the second gear meshed with the first gear drives the driving shaft 706 to rotate through rotation, so that the cutting knife 707 separates materials through rotary cutting.

Alternatively, the driver 702 is a motor.

In some embodiments, referring to fig. 8, the cutting assembly 7 further includes a limiting cylinder 701 disposed outside the cutting blade 707, where the limiting cylinder 701 is connected to the crushing tank 1 and disposed corresponding to the feeding port 101, and a protrusion 7011 is disposed on an inner wall of the limiting cylinder 701.

After the material enters the crushing tank 1 from the feed inlet 101, the material directly enters the limiting cylinder 701, the cutting knife 707 rotates to cut and crush the material, and meanwhile, the material contacts with the inner wall of the limiting cylinder 701 under the action of the rotating cutting force and rubs and shears with the protrusion 7011, so that the cutting efficiency is further improved. The limiting cylinder 701 not only can splash the materials in the crushing tank 1, but also increases the friction force with the materials, and is convenient for the materials to be stressed and cut.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. Novel jet milling device, its characterized in that includes:

a main screener connected to the first branch pipe; and

a backup screen connected to the second branch pipe;

2. The novel jet mill of claim 1 wherein said primary screen and said backup screen each comprise:

3. The novel jet milling device of claim 2, wherein the screen assembly comprises:

4. The novel jet mill of claim 2 wherein said primary and backup screens each further comprise a plurality of discharge hoppers in communication with said screen housing, said discharge hoppers being disposed in one-to-one correspondence with said screen assemblies and said discharge hoppers being located upstream of said screen assemblies.

5. The novel jet milling device of claim 2, wherein the screening housing is provided with a slot adapted to the screen assembly, the slot being disposed in correspondence to the mounting opening, the slot being configured to limit the screen assembly in the direction of conveyance.

6. The novel jet milling apparatus of claim 1, wherein the milling assembly comprises:

7. The novel jet milling device of claim 6, wherein the milling assembly further comprises a milling drum disposed in the milling tank, wherein the milling drum is coaxially disposed with the conveying pipe, and wherein the outer circumferential surface of the milling drum is uniformly provided with a plurality of conical teeth.

8. The novel jet milling device of claim 1, further comprising a cutting assembly disposed in the milling tank, the cutting assembly being located upstream of the milling assembly in the feed direction, the cutting assembly being configured to primarily mill and cut the material, a separator being disposed between the cutting assembly and the milling assembly, the separator having a material-permeable aperture disposed therein.

9. The novel jet milling device of claim 8, wherein the cutting assembly comprises:

a cutter connected to the drive shaft;

the driver is arranged on the outer wall of the crushing tank;

10. The novel jet milling device of claim 9, wherein the cutting assembly further comprises a limiting cylinder arranged outside the cutting knife, the limiting cylinder is connected with the milling tank and is arranged corresponding to the feeding port, and the inner wall of the limiting cylinder is provided with a protrusion.