Granulator

Abstract

The utility model relates to the technical field of powder coating granulation, in particular to a granulator which comprises a mounting frame, a driving device, a granulation pot, a screening device and a conveying device, the driving device is arranged on the mounting frame, and the driving device can drive the granulation pot to rotate around a horizontal shaft; a cavity with openings in the two ends is formed in the granulation pot, a spiral groove which is spirally formed in the direction of the rotating shaft is formed in the inner wall of the cavity, and the first end of the granulation pot communicates with the screening device; the screening device is used for screening the beads with unqualified particle sizes and conveying the qualified beads to the collecting box; and the conveying device is communicated between the screening device and the second end of the granulation pot. According to the granulation device, the pellets are subjected to powder coating in the spiral groove in the granulation pot, the pelletizing rate is high, the pelletizing granularity is uniform, and after the pellets are screened by the screening device, the unqualified pellets can be conveyed back into the granulation pot through the conveying device to be continuously subjected to powder coating, so that the pellets with the same diameter are produced in a continuous assembly line operation mode, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of powder coating and granulation technology, and in particular to a granulator. Background Technology

[0002] Granulation and coating are among the most dangerous processes in fireworks production. The spherical particles that produce sound, light, color, and noise in fireworks products are called "bright beads" in the industry. Currently, the production method for bright beads involves adding a core of explosive to a rotating container. The core is moistened, coated with powder, and repeatedly rolled to form bright beads. When some bright beads in the container reach the required diameter, they are manually removed and screened. Those smaller than the required diameter are returned to the container to be moistened and coated with powder again to increase their size. Due to the extremely uneven particle size, oversized beads must be crushed and remade, resulting in low production efficiency. The entire granulation and screening process requires manual intervention. Each fireworks manufacturer has a huge demand for bright beads, and because it is all manual work, the labor intensity is extremely high. Cases of dust toxicity harming the physical and mental health of operators are numerous. Explosions sometimes occur, constantly threatening the lives of operators.

[0003] Therefore, it is necessary to provide a new granulator to solve the above-mentioned technical problems. Utility Model Content

[0004] The main purpose of this utility model is to provide a granulator that aims to solve the problems of low production efficiency and low operational safety of existing granulators.

[0005] To achieve the above objectives, this utility model proposes a granulator for coating bead cores with powder to form granules. The granulator includes a mounting frame, a drive device, a granulation pot, a screening device, and a conveying device. The drive device is mounted on the mounting frame and can drive the granulation pot to rotate around a horizontal axis. A cavity with openings at both ends is formed inside the granulation pot. The inner wall of the cavity forms spiral grooves arranged in a spiral shape along the direction of rotation. The first end of the granulation pot is connected to the screening device. The screening device is used to screen out granules with unqualified particle size and convey qualified granules to a collection box. The conveying device is connected between the screening device and the second end of the granulation pot and is used to convey unqualified granules back into the cavity.

[0006] Optionally, the driving device includes a driving component, a driving roller, a driven roller, and a roller retaining ring. The driving component is mounted on the mounting frame, and its output shaft is connected to the driving roller. The driving roller and the driven roller are rotatably mounted on the mounting frame, and they cooperate to support the granulation pot. The roller retaining ring is located on the outer periphery of the granulation pot and contacts the driving roller and the driven roller respectively. The driving component can drive the driving roller to rotate, and the driving roller drives the granulation pot to rotate through the roller retaining ring.

[0007] Optionally, the number of driven rollers is two or more, and the driving roller and each of the driven rollers are evenly arranged on the outer periphery of the granulation pot.

[0008] Optionally, the number of the roller retaining rings is two or more, and each roller retaining ring is spaced apart on the granulation pot along the direction of the horizontal axis.

[0009] Optionally, the conveying device includes a recycling hopper, a conveying pipe, and a pneumatic conveyor. The recycling hopper is located below the screening device and is used to collect defective particles. The conveying pipe connects the recycling hopper and the cavity. The pneumatic conveyor is located on the conveying pipe and enables the defective particles in the recycling hopper to be conveyed along the conveying pipe into the cavity.

[0010] Optionally, the conveying device is a bucket elevator.

[0011] Optionally, the screening device includes a screen cylinder and a pusher plate. The screen cylinder is coaxially arranged with the granulation pot and communicates with the cavity. The screen cylinder is provided with a screening area, and the screening area has a plurality of screening holes evenly arranged. The inlet of the recovery hopper is positioned directly opposite the screening area, and the screen cylinder and the inlet of the recovery hopper are fitted with a clearance. The pusher plate is spirally arranged inside the screen cylinder along the central axis.

[0012] Optionally, the screen cylinder is connected to the granulation pot by fasteners.

[0013] Optionally, the screening device further includes a guide hopper and a drive assembly. The guide hopper is mounted on the mounting frame and is inclined downwards along the direction from the granulation pot to the screening device. The first end of the guide hopper extends into the screen cylinder, and the second end is clearance-fitted with the outer periphery of the first end of the granulation pot. The guide hopper is used to guide the granules in the granulation pot into the screen cylinder. The drive assembly can drive the screen cylinder to rotate along a horizontal axis, and the drive assembly has the same structure as the drive device.

[0014] Optionally, the granulator further includes an atomizing nozzle, which is configured to correspond to the discharge port of the conveying pipe and is used to humidify unqualified granules.

[0015] In this invention, the spiral groove in the granulation pot, driven by a driving device, increases the rolling path length of the beads during pelleting, as well as the coating time and contact area, resulting in a rapid increase in bead diameter and improved pelleting yield. The beads, rotating with the granulation pot, sequentially enter the screening device along the spiral groove. Unqualified beads are sieved and fall into the conveying device, which then transports them back to the granulation pot. The beads are coated with powder in the spiral groove within the granulation pot, resulting in a high pelleting rate and uniform particle size. Furthermore, unqualified beads, after being screened, can be transported back to the granulation pot for further coating, enabling continuous production of beads of the same diameter and improving production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the granulator in Embodiment 1 of this utility model;

[0018] Figure 2 This is a partial side view of the granulator in Embodiment 1 of this utility model;

[0019] Figure 3 This is a schematic diagram of the granulator in Embodiment 3 of this utility model.

[0020] Explanation of icon numbers:

[0021] 1. Mounting frame; 2. Drive unit; 2.1. Driving roller; 2.2. Driven roller; 2.3. Roller retaining ring; 3. Granulation pot; 3.1. Cavity; 3.2. Spiral groove; 4. Screening device; 4.1. Screen cylinder; 4.1.1. Screening zone; 4.2. Pusher plate; 4.3. Guide hopper; 4.4. Drive assembly; 5. Conveying device; 5.1. Recovery hopper; 5.2. Conveying pipe; 5.3. Pneumatic conveyor; 6. Atomizing nozzle.

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] 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.

[0024] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] This utility model proposes a granulator, which aims to solve the problems of low production efficiency and low operational safety of existing granulators.

[0029] Example 1

[0030] See Figure 1 and Figure 2A granulator is used to coat bead cores with powder to form granules. The granulator includes a mounting frame 1, a drive device 2, a granulation pot 3, a screening device 4, and a conveying device 5. The drive device 2 is mounted on the mounting frame 1 and can drive the granulation pot 3 to rotate around a horizontal axis. A cavity 3.1 with openings at both ends is formed inside the granulation pot 3. The inner wall of the cavity 3.1 forms a spiral groove 3.2 arranged spirally along the direction of rotation. The first end of the granulation pot 3 is connected to the screening device 4. The screening device 4 is used to screen out granules with unqualified particle size and convey qualified granules to a collection box. The conveying device 5 is connected between the screening device 4 and the second end of the granulation pot 3 and is used to convey unqualified granules back into the cavity 3.1. Under the action of the drive device 2, the spiral groove 3.2 set in the granulation pot 3 increases the rolling path length of the beads during the pelleting process and increases the coating time and contact area of ​​the coating, thereby rapidly increasing the diameter of the beads and improving the pelleting qualification rate. As the granulation pot 3 rotates, the beads sequentially enter the screening device 4 along the spiral groove 3.2. The screening device 4 filters out unqualified beads, which then fall into the conveying device 5 and are transported back to the granulation pot 3. The beads are coated with powder in the spiral groove 3.2 within the granulation pot 3, resulting in a high pelleting rate and uniform particle size. Furthermore, after being screened by the screening device 4, unqualified beads can be transported back to the granulation pot 3 by the conveying device 5 to continue coating, achieving continuous production of beads of the same diameter in a streamlined production line, thus improving production efficiency.

[0031] The driving device 2 includes a driving component, a driving roller 2.1, a driven roller 2.2, and a roller fixing ring 2.3. The driving component is mounted on the mounting frame 1, and its output shaft is connected to the driving roller 2.1. The driving roller 2.1 and the driven roller 2.2 are rotatably mounted on the mounting frame 1 and cooperate to support the granulation pot 3. The roller fixing ring 2.3 is located on the outer periphery of the granulation pot 3 and contacts the driving roller 2.1 and the driven roller 2.2 respectively. The driving component can drive the driving roller 2.1 to rotate, and the driving roller 2.1 drives the granulation pot 3 to rotate through the roller fixing ring 2.3. The driving roller 2.1 and the driven roller 2.2 cooperate to support the granulation pot 3, and the driving component drives the driving roller 2.1 to rotate, so that under the action of friction, the roller fixing ring 2.3 drives the granulation pot 3 to rotate, thereby causing the granules to roll and coat with powder inside the granulation pot 3.

[0032] Furthermore, there are two or more driven rollers 2.2, and the driving rollers 2.1 and each driven roller 2.2 are evenly arranged on the outer periphery of the granulation pot 3. The working combination of the driving rollers 2.1 and each driven roller 2.2 can both realize the rotation of the granulation pot 3 and limit the movement of the granulation pot 3, thereby improving the stability of the rotation process.

[0033] Furthermore, the number of roller retaining rings 2.3 is two or more, and each roller retaining ring 2.3 is spaced apart on the granulation pot 3 along the horizontal axis. All the roller retaining rings 2.3 are in contact with the driving roller 2.1, effectively improving the transmission efficiency of the drive device 2.

[0034] Specifically, the conveying device 5 includes a recycling hopper 5.1, a conveying pipe 5.2, and a pneumatic conveyor 5.3. The recycling hopper 5.1 is located below the screening device 4 and is used to collect defective particles. The conveying pipe 5.2 connects the recycling hopper 5.1 and the cavity 3.1. The pneumatic conveyor 5.3 is located on the conveying pipe 5.2 and enables the defective particles in the recycling hopper 5.1 to be conveyed along the conveying pipe 5.2 into the cavity 3.1. The pneumatic conveyor 5.3 can also input compressed air into the conveying pipe 5.2 to transport the particles back into the cavity along the conveying pipe 5.2, thereby realizing the recycling and reprocessing of defective particles.

[0035] The screening device 4 includes a screen cylinder 4.1 and a pusher plate 4.2. The screen cylinder 4.1 is coaxially arranged with the granulation pot 3 and communicates with the cavity 3.1. The screen cylinder 4.1 is provided with a screening area 4.1.1, and the screening area 4.1.1 is provided with a plurality of screening holes evenly arranged. The feed inlet of the recovery hopper 5.1 is positioned directly opposite the screening area 4.1.1, and the screen cylinder 4.1 and the feed inlet of the recovery hopper 5.1 are fitted with a clearance. The pusher plate 4.2 is spirally arranged inside the screen cylinder 4.1 along the central axis. After the granules enter the screen cylinder 4.1, the qualified granules move away from the granulation pot 3 along the pusher plate 4.2 as the granulation pot 3 and the screen cylinder 4.1 rotate, and finally fall into the collection box. The unqualified granules and a small amount of powder pass through the screen cylinder 4.1 and fall into the recovery hopper 5.1, and return to the cavity 3.1 through the conveying pipe 5.2. This completes the screening and collection of qualified granules and the recovery of unqualified granules, realizes assembly line production, and effectively improves production efficiency.

[0036] The screen cylinder 4.1 is connected to the granulation pot 3 by fasteners. The screen cylinder 4.1 rotates together with the granulation pot 3, and while screening qualified particles, it causes qualified particles to be collected in the collection box along the push plate 4.2, while unqualified particles return to the granulation pot 3 along the conveying pipe 5.2 for powder coating.

[0037] The granulator also includes an atomizing nozzle 6, which is correspondingly set to the discharge port of the conveying pipe 5.2, and is used to humidify unqualified granules. The mounting frame 1 is provided with a mounting rod with one end extending into the cavity 3.1. The atomizing nozzle 6 is set on the mounting rod to humidify the unqualified granules falling from the discharge port of the conveying pipe 5.2, so as to ensure the humidity of the granule surface and facilitate the granules to continue to be coated with powder in the granulation pot 3.

[0038] Example 2

[0039] The difference from Embodiment 1 is that the conveying device 5 is a bucket elevator. The feed end of the bucket elevator is set to correspond to the screen cylinder 4.1, and the discharge end of the bucket elevator is set to correspond to the opening of the granulation pot 3 away from the screen cylinder 4.1, which is used to transport the screened unqualified particles back into the cavity 3.1.

[0040] Example 3

[0041] The difference from Example 1 is as follows: See Figure 3 The screening device 4 also includes a guide hopper 4.3 and a drive assembly 4.4. The guide hopper 4.3 is mounted on the mounting frame 1 and is inclined downwards along the direction from the granulation pot 3 towards the screening device 4. The first end of the guide hopper 4.3 extends into the screen cylinder 4.1, and the second end is clearance-fitted with the outer periphery of the first end of the granulation pot 3. The guide hopper 4.3 is used to guide the granules in the granulation pot 3 into the screen cylinder 4.1. The drive assembly 4.4 can drive the screen cylinder 4.1 to rotate along a horizontal axis. The drive assembly 4.4 has the same structure as the drive device 2. The screening device 4 is independently set up from the granulation pot 3 and rotates through the drive assembly 4.4 and the drive device 2 respectively, and is connected through the guide hopper 4.3 to adapt to different working environments.

[0042] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A granulator for coating bead cores with powder to form granules, characterized in that, The granulator includes a mounting frame (1), a driving device (2), and a granulation pot (3). The driving device (2) is mounted on the mounting frame (1) and can drive the granulation pot (3) to rotate around a horizontal axis. A cavity (3.1) with openings at both ends is formed inside the granulation pot (3). The inner wall of the cavity (3.1) forms a spiral groove (3.2) arranged in a spiral shape along the direction of rotation axis.

2. The granulator as described in claim 1, characterized in that, The driving device (2) includes a driving component, a driving roller (2.1), a driven roller (2.2), and a roller fixing ring (2.3). The driving component is mounted on the mounting frame (1), and the output shaft of the driving component is connected to the driving roller (2.1). The driving roller (2.1) and the driven roller (2.2) are rotatably mounted on the mounting frame (1), and the driving roller (2.1) and the driven roller (2.2) cooperate to support the granulation pot (3). The roller fixing ring (2.3) is located on the outer periphery of the granulation pot (3) and contacts the driving roller (2.1) and the driven roller (2.2) respectively. The driving component can drive the driving roller (2.1) to rotate, and the driving roller (2.1) drives the granulation pot (3) to rotate through the roller fixing ring (2.3).

3. The granulator as described in claim 2, characterized in that, The number of driven rollers (2.2) is two or more, and the driving rollers (2.1) and each of the driven rollers (2.2) are evenly arranged on the outer periphery of the granulation pot (3).

4. The granulator as described in claim 3, characterized in that, The number of the roller fixing rings (2.3) is two or more, and each roller fixing ring (2.3) is spaced apart on the granulation pot (3) along the direction of the horizontal axis.

5. The granulator according to any one of claims 1 to 4, characterized in that, The granulator also includes a screening device (4) and a conveying device (5). The first end of the granulation pot (3) is connected to the screening device (4). The screening device (4) is used to screen out unqualified particles and convey qualified particles to the collection box. The conveying device (5) is connected between the screening device (4) and the second end of the granulation pot (3) and is used to convey unqualified particles back into the cavity (3.1).

6. The granulator as described in claim 5, characterized in that, The conveying device (5) includes a recycling hopper (5.1), a conveying pipe (5.2), and a pneumatic conveyor (5.3). The recycling hopper (5.1) is located below the screening device (4) and is used to collect unqualified particles. The conveying pipe (5.2) connects the recycling hopper (5.1) and the cavity (3.1). The pneumatic conveyor (5.3) is located on the conveying pipe (5.2) and enables the unqualified particles in the recycling hopper (5.1) to be conveyed along the conveying pipe (5.2) into the cavity (3.1).

7. The granulator as described in claim 5, characterized in that, The conveying device (5) is a bucket elevator.

8. The granulator as described in claim 6, characterized in that, The screening device (4) includes a screen cylinder (4.1) and a pusher plate (4.2). The screen cylinder (4.1) is coaxially arranged with the granulation pot (3) and communicates with the cavity (3.1). The screen cylinder (4.1) is provided with a screening area (4.1.1). The screening area (4.1.1) is provided with a plurality of uniformly arranged screening holes. The inlet of the recovery hopper (5.1) is set directly opposite to the screening area (4.1.1), and the screen cylinder (4.1) and the inlet of the recovery hopper (5.1) are fitted with a clearance. The pusher plate (4.2) is spirally arranged inside the screen cylinder (4.1) along the central axis.

9. The granulator as described in claim 8, characterized in that, The screen cylinder (4.1) is connected to the granulation pot (3) by fasteners.

10. The granulator as described in claim 8, characterized in that, The screening device (4) further includes a guide hopper (4.3) and a drive assembly (4.4). The guide hopper (4.3) is mounted on the mounting frame (1). The guide hopper (4.3) is inclined downward along the direction from the granulation pot (3) toward the screening device (4). The first end of the guide hopper (4.3) extends into the screen cylinder (4.1), and the second end is clearance-fitted with the outer periphery of the first end of the granulation pot (3). The guide hopper (4.3) is used to guide the granules in the granulation pot (3) into the screen cylinder (4.1). The drive assembly (4.4) can drive the screen cylinder (4.1) to rotate along the horizontal axis. The drive assembly (4.4) has the same structure as the drive device (2). And / or, the granulator further includes an atomizing nozzle (6). The atomizing nozzle (6) is arranged corresponding to the outlet of the conveying pipe (5.2) and is used to humidify the unqualified granules.

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