Spray granulation device for preparing metal oxide resistor disc

Abstract

The invention provides a spray granulation device for preparing a metal oxide resistor disc. The spray granulation device comprises a drying tower, a discharge conical hopper arranged at the bottom of the drying tower, an air inlet pipe sleeved with the drying tower and communicated with a heating air supply device, and a feed liquid pipe sleeved with the drying tower. According to the spray granulation device for preparing the metal oxide resistor disc, finished product particles can be guided to the position above a fourth conical guide plate through a third conical guide plate; under the driving of a servo motor, a fourth conical flow guide plate is driven to rotate, and meanwhile finished product particles falling on the outer surface of the fourth conical flow guide plate can be driven to be thrown to the outer side of the fourth conical flow guide plate; and the finished product particles with large particles preferentially fall into the discharging conical hopper to be collected under the action of the gravity of the finished product particles, the finished product particles with small particles can be discharged to the outer side of the drying tower through the air outlet pipe along with flowing of air, and the finished product particles are sorted through the structure, so that the obtained finished product particles are uniform in size.

Description

Technical Field

[0001] The present invention relates to the technical field of spray granulation, and specifically discloses a spray granulation device for preparing metal oxide varistors. Background Art

[0002] The spray granulation method is to form liquid materials into droplets by spraying, and then use hot air for drying to form granular products.

[0003] Chinese Patent Application No. CN201810609980.3 discloses a spray drying and granulation method and its device; including a drying tower, the upper end of the drying tower is respectively connected with an atomizing nozzle and a heating and air supply device, the atomizing nozzle is connected with a liquid material pipe, and the lower end of the drying tower is connected with a discharge hopper; a driving mechanism is installed on the drying tower, the output shaft of the driving mechanism is connected with a rotating shaft, the rotating shaft is connected to the side wall of the drying tower through a bearing, the other end of the rotating shaft is fixed with a turntable, the edge of the turntable is fixed with a support rod, the other end of the support rod is connected with a connecting rod through a bearing, the other end of the connecting rod is hinged with a lifting rod, and the other end of the lifting rod is fixed with a push plate, and the push plate is arranged inside the drying tower. The present invention provides a spray drying and granulation method and its device that can uniformly and quickly heat the atomized material, and solves the problem that the atomized material in the existing spray granulator is unevenly heated, resulting in unevenly formed particles.

[0004] The above-mentioned feeding plate cannot effectively sort the finished particles, resulting in the uneven size of the obtained finished particles. Moreover, both the atomized material and the hot air sprayed by the atomizing nozzle flow downward, making the falling speed of the atomized material relatively fast, which easily leads to uneven heating of the atomized material. Therefore, the size of the formed particles is also not uniform enough. Summary of the Invention

[0005] In view of the above defects or deficiencies in the prior art, the present application aims to provide a spray granulation device for preparing metal oxide varistors, including a drying tower, a discharge hopper arranged at the bottom of the drying tower, an air inlet pipe sleeved inside the drying tower and communicating with a heating and air supply device, a liquid pipe sleeved inside the drying tower, and an air outlet pipe sleeved inside the drying tower and communicating with a cyclone separator. A top cover is fixedly installed at the top of the drying tower. Inside the drying tower, a hot air distributor communicating with the air inlet pipe is fixedly installed through a first fixing rod. Inside the hot air distributor, an atomizing nozzle communicating with the liquid pipe is fixedly sleeved. The air discharge port of the hot air distributor and the liquid discharge port of the atomizing nozzle are both located at the top. A diversion pipe is sleeved on the top of the hot air distributor and located below the top cover. Guide mechanisms fixedly sleeved inside the drying tower are fixedly installed on the outer sides of the top and bottom ends of the diversion pipe. A second conical diversion plate is fixedly sleeved in the middle of the diversion pipe. A third conical diversion plate is fixedly sleeved inside the bottom end of the drying tower and located below the atomizing nozzle. A driving mechanism is fixedly installed inside the bottom end of the drying tower and located inside the top end of the discharge hopper. A fourth conical diversion plate is fixedly sleeved on the outer side of the top end of the driving mechanism and located below the third conical diversion plate.

[0006] Preferably, a hemispherical protrusion located inside the top end of the diversion pipe is arranged in the middle of the inner side of the top cover.

[0007] Preferably, a diversion ring is arranged on the outer side of the fourth conical diversion plate, and the inclination directions of the fourth conical diversion plate and the third conical diversion plate are opposite.

[0008] Preferably, the driving mechanism includes a mounting sleeve fixedly installed inside the drying tower through a third fixing rod. A servo motor is fixedly installed inside the mounting sleeve. A connecting sleeve arranged in the middle of the inner side surface of the fourth conical diversion plate is fixedly sleeved on the outer side of the output shaft of the servo motor.

[0009] Preferably, the guide mechanism includes a fixing sleeve fixedly sleeved on the outer side of the diversion pipe. A first conical diversion plate fixedly sleeved inside the drying tower is fixedly connected to the outer side of the fixing sleeve through a second fixing rod.

[0010] Preferably, the inclination directions of the fixing sleeve and the second conical diversion plate are opposite.

[0011] Preferably, connecting plates vertically distributed and located on the inner side surface of the fourth conical diversion plate are arranged on the outer side of the connecting sleeve.

[0012] The present invention has the following effects: 1. The spray granulation device for preparing metal oxide varistor chips can divert the finished particles to the upper part of the fourth conical deflector through the third conical deflector. Then, driven by the servo motor, while driving the fourth conical deflector to rotate, it can drive the finished particles falling on the outer surface of the fourth conical deflector to be thrown to the outside of the fourth conical deflector. And the larger finished particles will preferentially fall into the inner part of the discharge hopper under the action of their own gravity for collection, while the smaller finished particles can follow the air flow and be discharged to the outside of the drying tower through the air outlet pipe. Using this structure to sort the finished particles makes the obtained finished particles relatively uniform in size.

[0013] 2. The spray granulation device for preparing metal oxide varistor chips can divert the atomized material and hot air transported between the drying tower and the diversion pipe through the cooperation of the first conical deflector and the second conical deflector, and at the same time can reduce the falling speed of the atomized material, so that the atomized material can be uniformly heated, and the drying time of the dried finished particles is longer, and the particle size formed is also relatively uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects and advantages of the present application will become more obvious: Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a front sectional view of the structure of the present invention; Figure 3 It is a schematic diagram of the diversion mechanism of the present invention; Figure 4 It is a schematic diagram of the hot air distributor of the present invention; Figure 5 It is a schematic diagram of the fourth conical deflector of the present invention.

[0015] In the figure: 1, drying tower; 2, discharge hopper; 3, air inlet pipe; 4, liquid pipe; 5, air outlet pipe; 6, top cover; 7, first fixing rod; 8, hot air distributor; 9, atomizing nozzle; 10, diversion pipe; 11, diversion mechanism; 111, fixed sleeve; 112, second fixing rod; 113, first conical deflector; 12, second conical deflector; 13, third conical deflector; 14, driving mechanism; 141, third fixing rod; 142, mounting sleeve; 143, servo motor; 144, connecting sleeve; 15, fourth conical deflector; 16, hemispherical protrusion; 17, diversion ring; 18, connecting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. In addition, it should be noted that for the sake of description, only the parts related to the invention are shown in the drawings.

[0017] In the accompanying drawings of the embodiments of the present invention: Different types of hatching lines in the drawings are not marked according to the national standard, nor are the materials of the components required. It is to distinguish the cross-sectional views of the components in the drawings.

[0018] Please refer to Figures 1-5 , a spray granulation device for preparing metal oxide resistor chips, including a drying tower 1, a discharge hopper 2 provided at the bottom of the drying tower 1, an air inlet pipe 3 sleeved inside the drying tower 1 and communicating with a heating and air supply device, a liquid pipe 4 sleeved inside the drying tower 1, and an air outlet pipe 5 sleeved inside the drying tower 1 and communicating with a cyclone separator. A top cover 6 is fixedly installed at the top of the drying tower 1. A hot air distributor 8 communicating with the air inlet pipe 3 is fixedly installed inside the drying tower 1 through a first fixing rod 7. An atomizing nozzle 9 communicating with the liquid pipe 4 is fixedly sleeved inside the hot air distributor 8. The air outlet of the hot air distributor 8 and the liquid outlet of the atomizing nozzle 9 are both located at the top. With this distribution method, the atomized material and the hot air both flow upward, and the two can fully contact during the transportation process inside the diversion pipe 10. The atomized material can follow the flow of the hot air for transportation, which can effectively increase the drying time of the atomized material. A diversion pipe 10 located below the top cover 6 is sleeved on the top of the hot air distributor 8. Diversion mechanisms 11 fixedly sleeved inside the drying tower 1 are fixedly sleeved on the outer sides of the top and bottom ends of the diversion pipe 10. A second conical diversion plate 12 is fixedly sleeved in the middle of the diversion pipe 10. A third conical diversion plate 13 is fixedly sleeved inside the bottom end of the drying tower 1 below the atomizing nozzle 9. A driving mechanism 14 is fixedly installed inside the bottom end of the drying tower 1 at the inner side of the top end of the discharge hopper 2. A fourth conical diversion plate 15 is fixedly sleeved on the outer side of the top end of the driving mechanism 14 below the third conical diversion plate 13.

[0019] Among them, a hemispherical protrusion 16 located inside the top end of the diversion pipe 10 is provided in the middle of the inner side of the top cover 6. Through the hemispherical protrusion 16, the atomized material and the hot air discharged from the inside of the top end of the diversion pipe 10 can be evenly diverted to the outside of the diversion pipe 10, ensuring that the atomized material follows the flow of the hot air and is transported between the drying tower 1 and the diversion pipe 10.

[0020] Among them, a flow guide ring 17 is arranged on the outer side of the fourth conical flow guide plate 15, and the inclination directions of the fourth conical flow guide plate 15 and the third conical flow guide plate 13 are opposite. With this structure, the finished particles discharged from the inner side of the third conical flow guide plate 13 can fall centered on the surface of the fourth conical flow guide plate 15. At the same time, the rotating fourth conical flow guide plate 15 can drive the falling finished particles to gradually be thrown off. Moreover, the flow guide ring 17 can guide the air flow, enabling the air discharged from the inner side of the third conical flow guide plate 13 to flow upward, thereby facilitating the smaller finished particles to follow the air flow and be conveyed into the air outlet pipe 5.

[0021] Among them, the driving mechanism 14 includes a mounting sleeve 142 fixedly installed inside the drying tower 1 through a third fixing rod 141. A servo motor 143 is fixedly installed inside the mounting sleeve 142. A connecting sleeve 144 is fixedly sleeved on the outer side of the output shaft of the servo motor 143 and is arranged in the middle of the inner side surface of the fourth conical flow guide plate 15. The driving of the servo motor 143 can drive the fourth conical flow guide plate 15 to rotate around the axis of the connecting sleeve 144, thereby enabling the finished particles falling on the surface of the fourth conical flow guide plate 15 to gradually separate from its surface.

[0022] Among them, the flow guiding mechanism 11 includes a fixing sleeve 111 fixedly sleeved on the outer side of the flow guiding pipe 10. The outer side of the fixing sleeve 111 is fixedly connected through a second fixing rod 112 to a first conical flow guide plate 113 fixedly installed inside the drying tower 1. Through the cooperation of the fixing sleeve 111 and the second fixing rod 112, the flow guiding pipe 10 can be supported and fixed by the first conical flow guide plate 113 to ensure that air can flow between the flow guiding pipe 10 and the first conical flow guide plate 113.

[0023] Among them, the inclination directions of the fixing sleeve 111 and the second conical flow guide plate 12 are opposite. With this mechanism, the falling speed of the atomized material can be reduced, enabling it to fully contact with the hot air.

[0024] Among them, a connecting plate 18 is arranged on the outer side of the connecting sleeve 144 and is vertically distributed on the inner side surface of the fourth conical flow guide plate 15. The connecting plate 18 can increase the structural strength of the connecting sleeve 144, enabling the fourth conical flow guide plate 15 to rotate stably around the axis of the connecting sleeve 144.

[0025] When the device is working, the servo motor 143 is started. Driven by the servo motor 143, the fourth conical deflector 15 rotates around the axis of the connecting sleeve 144. Hot air is discharged from the air outlet at the top of the hot air distributor 8 through the air inlet pipe 3. The slurry is discharged from the liquid outlet at the top of the atomizing nozzle 9 through the liquid pipe 4 to form atomized material. At this time, the atomized material is conveyed upward inside the diversion pipe 10 along with the hot air. During this process, the atomized material is gradually dried by the hot air. When the atomized material and the hot air are conveyed to the inner side of the top end of the diversion pipe 10, they are deflected by the hemispherical protrusion 16, and then, through the top cover 6, the atomized material and the hot air are conveyed between the diversion pipe 10 and the drying tower 1. The first conical deflector 113 at the top end of the diversion pipe 10 deflects the atomized material and the hot air for the first time. The second conical deflector 12 deflects the atomized material and the hot air for the second time. The first conical deflector 113 at the bottom end of the diversion pipe 10 deflects the atomized material and the hot air for the third time. During this process, the atomized material is dried to form finished particles. The finished particles fall to the inner side of the third conical deflector 13 along with the flow of air for the fourth deflection. The deflected finished particles fall to the surface of the fourth conical deflector 15. The rotation of the fourth conical deflector 15 drives the finished particles to be thrown to the outside of the fourth conical deflector 15. The larger finished particles gradually fall into the inner part of the discharge cone hopper 2 under the action of their own gravity for collection. At the same time, the air discharged from the inner side of the third conical deflector 13 is deflected by the fourth conical deflector 15 and then redirected to flow above the fourth conical deflector 15 through the deflector ring 17. The smaller finished particles are conveyed into the cyclone separator through the air outlet pipe 5. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0026] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe this application in detail with reference to the drawings and in combination with the embodiments.

[0027] The above description is only the preferred embodiment of this application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A spray granulation device for preparing a metal oxide resistor, comprising a drying tower (1), a discharge cone hopper (2) arranged at the bottom of the drying tower (1), an air inlet pipe (3) sleeved inside the drying tower (1) and connected to a heating air supply device, a liquid feed pipe (4) sleeved inside the drying tower (1), and an air outlet pipe (5) sleeved inside the drying tower (1) and connected to a cyclone separator, characterized in that: A top cover (6) is fixedly mounted on the top of the drying tower (1); a hot air distributor (8) in communication with the air inlet pipe (3) is fixedly mounted on the inner side of the drying tower (1) via a first fixing rod (7); an atomizing nozzle (9) in communication with the liquid feed pipe (4) is fixedly mounted inside the hot air distributor (8); an air outlet of the hot air distributor (8) and a liquid outlet of the atomizing nozzle (9) are both located at the top; a guide pipe (10) located below the top cover (6) is mounted on the top of the hot air distributor (8); a top end of the guide pipe (10) and a The outer side of the bottom end is fixedly sleeved with a guide mechanism (11) fixedly sleeved inside the drying tower (1), and the middle part of the guide pipe (10) is fixedly sleeved with a second conical guide plate (12), the inner side of the bottom end of the drying tower (1) is fixedly sleeved with a third conical guide plate (13) located below the atomizing nozzle (9), and the inner side of the bottom end of the drying tower (1) is fixedly installed with a driving mechanism (14) located inside the top end of the discharge cone hopper (2), and the outer side of the top end of the driving mechanism (14) is fixedly sleeved with a fourth conical guide plate (15) located below the third conical guide plate (13).

2. The spray granulation device for preparing a metal oxide resistor according to claim 1, characterized in that: A hemispherical protrusion (16) located inside the top end of the flow guide tube (10) is provided in the middle of the inner side of the top cover (6).

3. The spray granulation device for preparing a metal oxide resistor according to claim 1, characterized in that: A guide ring (17) is provided on the outer side of the fourth conical guide plate (15), and the fourth conical guide plate (15) and the third conical guide plate (13) have opposite inclination directions.

4. The spray granulation device for preparing a metal oxide resistor according to claim 1, characterized in that: The driving mechanism (14) comprises a mounting sleeve (142) fixedly mounted on the inner side of the drying tower (1) via a third fixing rod (141); a servo motor (143) is fixedly mounted inside the mounting sleeve (142); and a connecting sleeve (144) arranged at the middle part of the inner side surface of the fourth conical guide plate (15) is fixedly mounted outside the output shaft of the servo motor (143).

5. The spray granulation device for preparing a metal oxide resistor according to claim 1, characterized in that: The flow guide mechanism (11) comprises a fixed sleeve (111) fixedly sleeved on the outside of the flow guide pipe (10), and the outside of the fixed sleeve (111) is fixedly connected to a first conical flow guide plate (113) fixedly sleeved inside the drying tower (1) via a second fixed rod (112).

6. The spray granulation device for preparing a metal oxide resistor according to claim 5, characterized in that: The fixing sleeve (111) and the second conical guide plate (12) are inclined in opposite directions.

7. The spray granulation device for preparing a metal oxide resistor according to claim 4, characterized in that: A connecting plate (18) is arranged on the outside of the connecting sleeve (144) and is vertically distributed and located on the inner side of the fourth conical guide plate (15).

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