Internal circulation cooling type jet mill

Abstract

The utility model relates to the technical field of neodymium iron boron permanent magnet production equipment, and discloses an internal circulation cooling type jet mill which comprises a grinding chamber, a feeding pipe fixedly communicates with the upper portion of the grinding chamber, and an anti-blocking shaft is rotationally connected into the right end of the feeding pipe. According to the internal circulation cooling type jet mill, through the arranged anti-blocking shaft, auger blades can be driven to rotate in the feeding pipe, materials can be conveyed into the grinding chamber, the feeding pipe is dredged, blocking of the feeding pipe is relieved, through the arranged cam, a piston rod can be linked to reciprocate in an air cylinder, and the feeding pipe is driven to rotate. And meanwhile, an arranged gear drives a curved surface block to continuously extrude a knocking ball, so that a knocking plate knocks the feeding pipe under the reset of a torsional spring after being turned over, materials in the feeding pipe are subjected to uniform high-frequency vibration, and the anti-blocking effect is further improved. And the problem of material blockage is effectively solved.

Description

Technical Field

[0001] This application relates to the technical field of neodymium iron boron permanent magnet production equipment, specifically to an internal circulation cooling airflow mill. Background Technology

[0002] Air jet mills are among the most commonly used ultrafine grinding equipment, widely used for ultrafine grinding of non-metallic minerals and chemical raw materials. Accelerated particles collide and crush each other at the intersection of various nozzles. The crushed material is transported to the classification zone by the rising airflow, where horizontally arranged classification wheels screen out fine powder that meets the particle size requirements, while coarse powder that does not meet the particle size requirements is returned to the grinding zone for further grinding.

[0003] An existing patent (publication number: CN218423252U) discloses an internal circulation cooling airflow mill, including a grinding chamber and a cyclone separator. The upper end of the grinding chamber is connected to a feed pipe, and the lower end is connected to a nitrogen compressor for air intake. The cyclone separator is connected to the side of the grinding chamber, and the outlet of the cyclone separator is connected to the inlet of the nitrogen compressor to form an internal circulation nitrogen circuit. A cooling jacket is provided at the outer end of the grinding chamber, and the inlet of the cooling jacket is connected to a liquid nitrogen storage tank. This utility model relates to the technical field of neodymium iron boron permanent magnet production equipment. This internal circulation cooling airflow mill, through the setting of a vibration anti-blocking mechanism, facilitates impact on the feed pipe, thereby causing the feed pipe to vibrate and effectively reducing the possibility of feed pipe blockage. Through the setting of an intermittent air blowing unblocking mechanism, it facilitates intermittent air blowing into the feed pipe, thereby generating an unstable airflow in the feed pipe, further improving the anti-blocking effect. Moreover, it only requires a single servo motor drive, effectively achieving the purpose of saving energy.

[0004] The aforementioned airflow mill drives the turntable to rotate via a drive shaft, which in turn pulls the hollow column back and forth on the vertical plate via a connecting strip, allowing the impact block to continuously impact the feed pipe. However, during the impact process, the impact block can only contact a part of the feed pipe, resulting in uneven vibration. At the same time, the deformation spring can absorb energy from the impact block during the impact process, which reduces the impact force and results in poor vibration effect. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides an internal circulation cooling airflow mill, which has advantages such as high-frequency uniform vibration. It solves the problems that during the impact process, the impact block can only contact a part of the feed pipe, resulting in uneven vibration. At the same time, during the impact process, the deformation spring can absorb energy from the impact block, resulting in reduced impact force and poor vibration effect.

[0006] To achieve the above objectives, this application provides the following technical solution: an internal circulation cooling airflow mill, comprising a grinding chamber, a feed pipe fixedly connected to the upper part of the grinding chamber, an anti-blocking shaft rotatably connected to the right end of the feed pipe, an auger blade fixedly connected to the bottom end of the anti-blocking shaft, a conveying pipe fixedly installed below the feed pipe, and a plurality of nozzles fixedly connected to the outer surface of the conveying pipe, the output end of each nozzle being fixedly embedded in the feed pipe;

[0007] A reset ring is fixedly connected to the bottom end of the feed tube. The upper surface of the reset ring is provided with a plurality of circumferentially arranged mounting grooves. A striking plate is provided between the two inner sidewalls of each mounting groove. A striking ball is fixedly connected to the side of each striking plate near the feed tube.

[0008] The above solution utilizes an anti-clogging shaft to rotate the auger blades inside the feed pipe, allowing material to enter the grinding chamber and clear blockages. A cam, linked to a piston rod, reciprocates inside the air cylinder, delivering external gas through a nozzle into the feed pipe, creating an unstable airflow and further enhancing the anti-clogging effect. Simultaneously, gears drive curved blocks to continuously press and strike the impact ball, causing the impact plate to flip and, after being reset by a torsion spring, strike the feed pipe, providing uniform high-frequency vibration to the material inside, effectively solving the problem of material blockage.

[0009] Furthermore, a cam is fixedly connected to the top of the anti-clogging shaft, an air cylinder is fixedly connected to the outer surface of the left end of the feed pipe, a piston rod is slidably inserted inside the air cylinder, a contact ball is fixedly connected to the right end of the piston rod, the contact ball contacts the cam, a spring is fixedly installed between the contact ball and the air cylinder, an air inlet pipe and an air outlet pipe are fixedly connected to the outer surface of the air cylinder respectively, and a one-way valve is installed inside both the air inlet pipe and the air outlet pipe.

[0010] The above scheme, through the arrangement of cams and springs, enables the reciprocating motion of the piston rod.

[0011] Furthermore, a flexible tube is fixedly connected to the other end of the air outlet pipe, and the other end of the flexible tube is fixedly connected to the left end of the delivery pipe.

[0012] The above method, through the installation of hoses, can achieve the purpose of gas delivery.

[0013] Furthermore, a reset shaft is rotatably connected between the two inner sidewalls of each mounting slot, and each striking plate is fixedly connected to its adjacent reset shaft.

[0014] The above solution, through the setting of the reset axis, can achieve the purpose of flipping the striking plate.

[0015] Furthermore, each of the striking plates has a torsion spring fixedly connected to both sides, and the other end of each torsion spring is fixedly connected to the inner wall of the mounting groove adjacent to it.

[0016] The above solution, through the setting of torsion springs, can achieve the purpose of resetting the striking plate.

[0017] Furthermore, a first gear is rotatably connected to the bottom end of the feed tube, and a plurality of circumferentially arranged curved surface blocks are fixedly connected to the upper surface of the first gear.

[0018] The above scheme, through the setting of curved blocks, can achieve the purpose of squeezing and repositioning the striking ball.

[0019] Furthermore, a power shaft is rotatably connected to the upper surface of the grinding chamber, and a second gear is fixedly connected to the outer surface of the power shaft, the second gear meshing with the first gear.

[0020] The above scheme, through the arrangement of the second gear and the first gear, can drive the curved block to move in a circular motion.

[0021] Furthermore, the top end of the anti-blocking shaft and the top end of the power shaft are respectively fixedly connected to the external motor output end.

[0022] The above solution, through the installation of an external motor, can provide power for the rotation of the anti-blocking shaft and the power shaft.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] This internal circulation cooling airflow mill, through its anti-clogging shaft, drives the auger blades inside the feed pipe to rotate, conveying material into the grinding chamber and clearing the feed pipe, thus reducing blockage. A cam, linked to a piston rod, reciprocates inside the air cylinder, delivering external gas through a nozzle into the feed pipe, creating an unstable airflow and further enhancing the anti-clogging effect. Simultaneously, gears drive curved blocks to continuously squeeze and strike the impact balls, causing the impact plate to flip and, after being reset by a torsion spring, strike the feed pipe, providing uniform high-frequency vibration to the material inside, effectively solving the problem of material blockage. Attached Figure Description

[0025] Figure 1 This is a front view of the overall structure of this application;

[0026] Figure 2 This is a partial perspective view of the overall structure of this application;

[0027] Figure 3 This is a sectional view of the overall structure of this application from the front.

[0028] Figure 4 For this application Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0029] In the picture:

[0030] 1. Grinding chamber; 2. Feed pipe; 3. Anti-clogging shaft; 4. Screwdriver blade; 5. Conveying pipe; 6. Nozzle; 7. Reset ring; 8. Mounting groove; 9. Striking plate; 10. Striking ball; 11. Cam; 12. Air cylinder; 13. Piston rod; 14. Contact ball; 15. Spring; 16. Air inlet pipe; 17. Air outlet pipe; 18. One-way valve; 19. Hose; 20. Reset shaft; 21. Torsion spring; 22. First gear; 23. Curved block; 24. Power shaft; 25. Second gear. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 1 , Figure 2 and Figure 3 This embodiment of an internal circulation cooling airflow mill includes a grinding chamber 1. A feed pipe 2 is fixedly connected to the upper part of the grinding chamber 1. An anti-blocking shaft 3 is rotatably connected to the right end of the feed pipe 2. A cam 11 is fixedly connected to the top of the anti-blocking shaft 3. An air cylinder 12 is fixedly connected to the outer surface of the left end of the feed pipe 2. A piston rod 13 is slidably inserted into the air cylinder 12. A contact ball 14 is fixedly connected to the right end of the piston rod 13. The contact ball 14 contacts the cam 11. A spring 15 is fixedly installed between the contact ball 14 and the air cylinder 12. An air inlet pipe 16 and an air outlet pipe 17 are fixedly connected to the outer surface of the air cylinder 12. A one-way valve 18 is installed inside both the air inlet pipe 16 and the air outlet pipe 17. The reciprocating motion of the piston rod 13 can be achieved through the setting of the cam 11 and the spring 15.

[0033] Please see Figure 1 , Figure 3 and Figure 4 The other end of the air outlet pipe 17 is fixedly connected to a hose 19, and the other end of the hose 19 is fixedly connected to the left end of the conveying pipe 5. Through the setting of the hose 19, the purpose of conveying gas can be achieved. The bottom end of the anti-blocking shaft 3 is fixedly connected to an auger blade 4. The conveying pipe 5 is fixedly installed below the feed pipe 2. Multiple nozzles 6 are fixedly connected to the outer surface of the conveying pipe 5. The output end of each nozzle 6 is fixedly embedded in the feed pipe 2.

[0034] Please see Figure 1 , Figure 2 and Figure 3 A reset ring 7 is fixedly connected to the bottom end of the feed pipe 2. The upper surface of the reset ring 7 is provided with multiple circumferentially arranged mounting grooves 8. A striking plate 9 is provided between the two inner side walls of each mounting groove 8. A striking ball 10 is fixedly connected to the side of each striking plate 9 near the feed pipe 2. A reset shaft 20 is rotatably connected between the two inner side walls of each mounting groove 8. Each striking plate 9 is fixedly connected to its adjacent reset shaft 20. The setting of the reset shaft 20 can achieve the purpose of flipping the striking plate 9. A torsion spring 21 is fixedly connected to both sides of each striking plate 9. The other end of each torsion spring 21 is fixedly connected to the inner wall of its adjacent mounting groove 8. The setting of the torsion spring 21 can achieve the purpose of resetting the striking plate 9.

[0035] Please see Figure 1 , Figure 2 and Figure 3 The bottom end of the feed pipe 2 is rotatably connected to a first gear 22. The upper surface of the first gear 22 is fixedly connected to a plurality of circumferentially arranged curved blocks 23. The curved blocks 23 are arranged to squeeze and displace the striking ball 10. The upper surface of the grinding chamber 1 is rotatably connected to a power shaft 24. The outer surface of the power shaft 24 is fixedly connected to a second gear 25. The second gear 25 meshes with the first gear 22. The arrangement of the second gear 25 and the first gear 22 can drive the curved blocks 23 to move in a circular motion. The top end of the anti-blocking shaft 3 and the top end of the power shaft 24 are fixedly connected to the output end of an external motor. The external motor can provide power for the rotation of the anti-blocking shaft 3 and the power shaft 24.

[0036] In this embodiment, an internal circulation cooling airflow mill, through the anti-clogging shaft 3, can drive the auger blades 4 to rotate inside the feed pipe 2, thus conveying material into the grinding chamber 1 and clearing the feed pipe 2, reducing blockage. Through the cam 11, the piston rod 13 can be linked to reciprocate inside the air cylinder 12, thereby conveying external gas into the feed pipe 2 through the air nozzle, causing unstable airflow in the feed pipe 2, further improving the anti-clogging effect. At the same time, through the gear, the curved block 23 continuously squeezes and strikes the ball 10, causing the striking plate 9 to flip and then strike the feed pipe 2 under the reset of the torsion spring 21, giving the material inside the feed pipe 2 uniform high-frequency vibration, effectively solving the problem of material blockage.

[0037] It should be noted that each striking ball 10 is in contact with the grinding chamber 1, and each torsion spring 21 is in the reset state.

[0038] The working principle of the above embodiment is as follows: During operation, when feeding through the feed pipe 2, an external motor is started, driving the anti-blocking shaft 3 to rotate. The anti-blocking shaft 3 drives the cam 11 to rotate. During the rotation of the cam 11, the pressure piston rod 13 reciprocates inside the air cylinder 12, thereby continuously drawing in external gas, which is then ejected from the nozzle 6 through the conveying pipe 5 and enters the air inlet pipe 16. This causes an unstable airflow in the feed pipe 2, further improving the anti-blocking effect. During the rotation of the anti-blocking shaft 3, the bottom auger blades 4 are driven to rotate, which can... The feed pipe 2 continuously conveys materials to avoid blockage. At the same time, the drive shaft 24 rotates, which drives the first gear 22 and the second gear 25 to mesh and drive the curved block 23 to rotate. When the curved block 23 contacts the striking ball 10, it causes the striking ball 10 and the striking plate 9 to flip. At the same time, the torsion spring 21 is compressed. When there is no contact, the torsion spring 21 resets and drives the striking ball 10 to reset. Through the rapid rotation of the curved block 23, the purpose of high-frequency striking can be achieved, so that the internal materials vibrate rapidly and avoid material blockage and accumulation.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An internal circulation cooling airflow mill, comprising a grinding chamber (1), characterized in that: The upper part of the grinding chamber (1) is fixedly connected to the feed pipe (2), the right end of the feed pipe (2) is rotatably connected to the anti-blocking shaft (3), the bottom end of the anti-blocking shaft (3) is fixedly connected to the auger blade (4), the lower part of the feed pipe (2) is fixedly installed to the conveying pipe (5), the outer surface of the conveying pipe (5) is fixedly connected to multiple nozzles (6), and the output end of each nozzle (6) is fixedly embedded in the feed pipe (2); The bottom end of the feed pipe (2) is fixedly connected to a reset ring (7). The upper surface of the reset ring (7) is provided with multiple circumferentially arranged mounting grooves (8). A striking plate (9) is provided between the two inner sidewalls of each mounting groove (8). A striking ball (10) is fixedly connected to the side of each striking plate (9) near the feed pipe (2).

2. The internal circulation cooling airflow mill according to claim 1, characterized in that: A cam (11) is fixedly connected to the top of the anti-blocking shaft (3). An air cylinder (12) is fixedly connected to the outer surface of the left end of the feed pipe (2). A piston rod (13) is slidably inserted inside the air cylinder (12). A contact ball (14) is fixedly connected to the right end of the piston rod (13). The contact ball (14) contacts the cam (11). A spring (15) is fixedly installed between the contact ball (14) and the air cylinder (12). An air inlet pipe (16) and an air outlet pipe (17) are fixedly connected to the outer surface of the air cylinder (12). A one-way valve (18) is installed inside both the air inlet pipe (16) and the air outlet pipe (17).

3. The internal circulation cooling airflow mill according to claim 2, characterized in that: The other end of the air outlet pipe (17) is fixedly connected to a hose (19), and the other end of the hose (19) is fixedly connected to the left end of the delivery pipe (5).

4. The internal circulation cooling airflow mill according to claim 1, characterized in that: Each of the mounting slots (8) is rotatably connected to a reset shaft (20) between its two inner sidewalls, and each of the striking plates (9) is fixedly connected to its adjacent reset shaft (20).

5. The internal circulation cooling airflow mill according to claim 1, characterized in that: Each of the striking plates (9) has a torsion spring (21) fixedly connected to both sides, and the other end of each torsion spring (21) is fixedly connected to the inner wall of the mounting groove (8) adjacent to it.

6. The internal circulation cooling airflow mill according to claim 1, characterized in that: The bottom end of the feed pipe (2) is rotatably connected to a first gear (22), and a plurality of circumferentially arranged curved blocks (23) are fixedly connected to the upper surface of the first gear (22).

7. The internal circulation cooling airflow mill according to claim 1, characterized in that: The upper surface of the grinding chamber (1) is rotatably connected to a power shaft (24), and the outer surface of the power shaft (24) is fixedly connected to a second gear (25), which meshes with the first gear (22).

8. The internal circulation cooling airflow mill according to claim 1, characterized in that: The top end of the anti-blocking shaft (3) and the top end of the power shaft (24) are respectively fixedly connected to the motor output end of the outside.

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