Powder coating production cooling device

Abstract

The utility model relates to powder coating processing equipment technical field discloses a kind of powder coating preparation cooling device.The device includes frame, fixed in the frame upper portion's stirring box and is located at the stirring box top's stirring mechanism;The stirring mechanism includes rotating rod driven by motor and rotating blade fixed on rotating rod, device further includes compressor, condenser, expansion valve and evaporator, and the pipeline of the evaporator is tightly wound in the outer wall of the stirring box.The utility model combines the forced turning action of stirring mechanism with the depth cooling action of evaporator wound in the outer wall of stirring box, forcibly makes all powder particles and the box wall being cooled to carry out sufficient heat exchange, effectively solve the problem that the cooling speed is slow, cooling is uneven and easy to cake in prior art due to poor powder thermal conductivity, significantly improve cooling efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of powder coating processing equipment, and in particular to a powder coating preparation cooling device. Background Technology

[0002] As an environmentally friendly coating, powder coatings typically require rapid cooling of the molten, extruded material during production to render it brittle before subsequent mechanical pulverization. Therefore, the cooling process is one of the key steps determining the final powder particle size and production efficiency.

[0003] In current production practices, a common cooling method is to spread hot, blocky or sheet-like materials flat on a conveyor belt and allow them to cool naturally or through forced air cooling using a fan. While this method is simple in structure, its inherent limitations are also quite prominent.

[0004] The key issue is that powder coating materials are poor conductors of heat, with low thermal conductivity. When using the aforementioned static or semi-static surface cooling methods, heat transfer relies primarily on the material's own slow thermal conduction. This results in heat being rapidly dissipated only from the surface layer of the material, while the temperature in the core internal region remains high for an extended period, creating a significant temperature difference between the inside and outside.

[0005] This uneven cooling not only significantly prolongs the overall cooling cycle and reduces production efficiency, but more seriously, it causes uneven hardness between the inside and outside of the material. Areas that haven't fully cooled are prone to sticking together, forming difficult-to-handle clumps. These clumps not only affect the uniformity of the final product's quality but also create significant difficulties for subsequent crushing processes.

[0006] Therefore, this utility model proposes a powder coating preparation cooling device to overcome the shortcomings of the prior art. Utility Model Content

[0007] To overcome the above shortcomings, this utility model provides a powder coating preparation cooling device, which aims to improve the problems of slow cooling speed, uneven cooling and easy material agglomeration in existing powder coating preparation cooling devices. This utility model aims to provide a powder coating preparation cooling device with an improved structure that can effectively solve the above problems.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a powder coating preparation cooling device, comprising a frame and a stirring box fixed above the frame, wherein a stirring mechanism is detachably connected to the top of the stirring box; the stirring mechanism includes a fixed column, a motor is fixedly connected to the top of the fixed column, the bottom of the fixed column is fixed to the top of the stirring box, a rotating rod is rotatably inserted inside the fixed column, the upper end of the rotating rod is drively connected to the output shaft of the motor, a sleeve is fixedly sleeved on the outside of the rotating rod, and a first rotating blade and a second rotating blade are fixedly welded to the outer wall of the sleeve; the device further includes a compressor, a condenser, an expansion valve, and an evaporator, wherein the pipes of the evaporator are fixed to the outer wall of the stirring box in a tightly wound manner, thereby forming a structure in which internal stirring and external cooling work together.

[0009] Preferably, the powder coating preparation cooling device further includes a fan, which is fixed on the frame, and the air outlet of the fan is connected to the upper side wall of the mixing box through a pipe.

[0010] Preferably, a quick-release mechanism is provided between the stirring mechanism and the stirring box to enable quick fixing and separation between the two.

[0011] Preferably, as a further limitation of the aforementioned solution, the quick-release mechanism includes an adjusting rod, a limiting post, and a spring; the adjusting rod is rotatably connected to the sleeve rod, the limiting post is driven to move by the adjusting rod, and the spring is fixed between the two limiting posts and is squeezed or released by the limiting posts.

[0012] Preferably, a feed inlet is provided at the top of one side of the frame and is connected to one side of the mixing box via a pipe, and a discharge outlet is provided at the bottom of the other side of the frame and is connected to the other side of the mixing box via a pipe.

[0013] Preferably, casters are fixedly connected to the four bottom corners of the frame to facilitate the movement of the device.

[0014] Preferably, the compressor, the condenser, the expansion valve, and the evaporator are connected in series via pipes to form a closed loop.

[0015] Preferably, in order to achieve better heat dissipation and structural balance, the condenser is fixed to the frame symmetrically from left to right.

[0016] Preferably, in order to improve the uniformity of stirring, the first rotating blade and the second rotating blade are staggered vertically and spaced apart along the axial direction of the sleeve.

[0017] This utility model has the following beneficial effects:

[0018] 1. In this utility model, the structure of the evaporator set on the outer wall of the mixing box and the stirring mechanism set inside the mixing box working together solves the problem of uneven cooling and easy agglomeration caused by the poor thermal conductivity of powder in the prior art. It achieves the technical effect of rapid, deep and uniform cooling of powder coatings, and significantly improves product quality.

[0019] 2. In this utility model, by adding a quick-release mechanism between the stirring mechanism and the stirring box, the problems of difficult internal cleaning, time-consuming maintenance, and low production change efficiency of existing cooling equipment are solved. The core components can be quickly disassembled for cleaning without tools, which greatly improves the maintainability of the equipment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a powder coating preparation cooling device proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the inlet structure of a powder coating preparation cooling device proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the stirring mechanism of a powder coating preparation cooling device proposed in this utility model;

[0023] Figure 4 This is a schematic diagram of the quick-release mechanism of a powder coating preparation cooling device proposed in this utility model.

[0024] Legend:

[0025] 1. Frame; 2. Casters; 3. Feed inlet; 4. Discharge outlet; 5. Stirring mechanism; 501. Motor; 502. Fixed column; 503. Rotating rod; 504. Sleeve rod; 505. First rotating blade; 506. Second rotating blade; 6. Quick release mechanism; 601. Adjusting rod; 602. Limiting column; 603. Spring; 7. Fan; 8. Evaporator; 9. Stirring box; 10. Compressor; 11. Expansion valve; 12. Condenser. Detailed Implementation

[0026] 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.

[0027] Please refer to Figures 1 to 4This utility model provides a powder coating preparation cooling device, which aims to solve the problems of slow cooling speed, uneven cooling and easy agglomeration caused by the poor thermal conductivity of powder coatings in the prior art.

[0028] like Figure 1 and Figure 2 As shown, the powder coating preparation and cooling device includes a frame 1 and a mixing box 9 fixed on top of the frame 1. The frame 1 serves as the base for moving and installing the entire device. Casters 2 are fixedly connected to the four corners of the bottom of the frame 1 to facilitate the movement of the device. A feed inlet 3 is opened on the top of one side of the frame 1 and is connected to one side of the mixing box 9 through a pipe. A discharge outlet 4 is opened on the bottom of the other side of the frame 1 and is connected to the other side of the mixing box 9 through a pipe. The mixing box 9 is used to contain and cool the high-temperature powder coating.

[0029] The mixing box 9 is equipped with a stirring mechanism 5 inside, and a cooling component is integrated into the outer wall of the mixing box 9 to form a synergistic structure. Specifically, the stirring mechanism 5 is installed on the top of the mixing box 9 as a whole. The stirring mechanism 5 includes a fixed column 502. The bottom of the fixed column 502 is detachably fixed to the top of the mixing box 9 through a quick-release mechanism 6. A motor 501 is fixedly connected to the top of the fixed column 502. A rotating rod 503 is rotatably inserted inside the fixed column 502. The upper end of the rotating rod 503 is connected to the output shaft of the motor 501, so that the motor 501 drives the rotating rod 503 to rotate. A sleeve rod 504 is fixedly sleeved on the outside of the rotating rod 503. A first rotating blade 505 and a second rotating blade 506 are fixedly welded to the outer wall of the sleeve rod 504. The first rotating blade 505 and the second rotating blade 506 are staggered vertically along the axial direction of the sleeve rod 504. This structure can continuously and fully stir and agitate the powder inside the mixing box 9 under the drive of the motor 501.

[0030] To achieve deep cooling of the powder, the device is equipped with a compressor 10, a condenser 12, an expansion valve 11, and an evaporator 8. The pipes of the evaporator 8 are tightly wound around the outer wall of the mixing box 9 to form a cooling jacket structure, which can efficiently exchange heat with the wall of the mixing box 9. The compressor 10, condenser 12, expansion valve 11, and evaporator 8 are connected in series through pipes to form a closed loop. The condenser 12 is symmetrically fixed to the frame 1, and the compressor 10 and expansion valve 11 are also firmly installed on the frame 1. In addition, the device also includes a fan 7 for pre-cooling. The fan 7 is fixed to the frame 1, and the air outlet of the fan 7 is connected to the upper side wall of the mixing box 9 through a pipe.

[0031] To facilitate the easy assembly and disassembly of the mixing mechanism 5 and the mixing box 9, a quick-release mechanism 6 is provided between them in this embodiment. Through structural cooperation, the quick-release mechanism 6 enables the mixing mechanism 5 to be quickly fixed or separated without tools.

[0032] The quick-release mechanism 6 includes an adjusting rod 601, a limiting post 602, and a spring 603. The adjusting rod 601 is rotatably connected to the sleeve rod 504, and the adjusting rod 601 is linked with the limiting post 602. The spring 603 is fixed between the two limiting posts 602. When installing the stirring mechanism 5, the stirring mechanism 5 is placed on top of the stirring box 9. The adjusting rod 601 is rotated, which drives the limiting post 602 to rotate circumferentially along the fixed post 502. During the rotation, the protrusion of the limiting post 602 cooperates with the inclined guide rail set on the top of the stirring box 9, so that the limiting post 602 is guided downward while rotating, thereby compressing the spring 603. When the limiting post 602 rotates to the end of the guide rail and falls into the preset slot, the compressed spring 603 provides a continuous axial force, so that the limiting post 602 is firmly locked in the slot, thereby completing the quick locking of the stirring mechanism 5.

[0033] When the stirring mechanism 5 needs to be disassembled for cleaning or maintenance, simply rotate the adjusting rod 601 in the opposite direction. The limiting post 602 will then disengage from the preset slot and move in the opposite direction along the inclined guide rail. During this process, the elastic force of the spring 603 is released, ultimately allowing the entire stirring mechanism 5 to be lifted and separated directly from the stirring box 9. This quick-release structure, which uses the adjusting rod 601 to drive the limiting post 602 and combines the elastic force of the spring 603 to achieve locking and releasing, is not only stable and reliable, but also extremely simple and quick to operate, greatly improving the maintenance efficiency of the equipment.

[0034] In a preferred embodiment, in order to achieve initial rapid cooling of high-temperature powder, the device also includes a fan 7; the fan 7 is securely fixed to one side of the frame 1 by a bracket, and the air outlet of the fan 7 is connected to the upper side wall of the mixing box 9 through a metal pipe. The connection between the pipe and the mixing box 9 is well sealed to ensure that cold air can be effectively blown into the mixing box 9 and directly act on the powder surface.

[0035] As another preferred embodiment, in order to construct a stable and efficient deep cooling loop, the compressor 10, condenser 12, expansion valve 11 and evaporator 8 are connected in series through multiple refrigeration pipes to form a complete closed loop; more specifically, in order to achieve balanced heat dissipation and structural stability, there are two condensers 12, and these two condensers 12 are fixed symmetrically on both sides of the frame 1.

[0036] As another preferred embodiment, in order to improve the stirring efficiency and the uniformity of powder agitation, the first rotating blade 505 and the second rotating blade 506 are staggered vertically along the axial direction of the sleeve 504; and the blades of the first rotating blade 505 and the second rotating blade 506 are also staggered at a certain angle in the circumferential direction. This three-dimensional staggered layout enables the powder to generate a complex composite motion of up-and-down tumbling and circumferential flow in the stirring box 9.

[0037] In addition, in a preferred embodiment, in order to facilitate the movement of the device and the flexible layout of the production line, casters 2 that can rotate in all directions are fixedly connected to the four corners of the bottom of the frame 1; at the same time, in order to realize the continuous processing of materials, a feed port 3 is opened on the top of one side of the frame 1 and is connected to one side of the mixing box 9 through a pipe for receiving high-temperature powder, and a discharge port 4 is opened on the bottom of the other side of the frame 1 and is connected to the other side of the mixing box 9 through a pipe for discharging cooled powder.

[0038] Working principle: When the high-temperature powder coating enters the mixing box 9 through the top feed inlet 3, the fan 7 installed on one side of the frame 1 starts and blows cold air from outside into the mixing box 9 through the pipe. The cold air comes into direct contact with the high-temperature powder coating, thus performing preliminary surface cooling treatment on the powder coating. At the same time, the deep cooling circuit consisting of the compressor 10, condenser 12, expansion valve 11, and evaporator 8 starts to work. The compressor 10 compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, which then enters the mixing box 9. The refrigerant is cooled and liquefied into a medium-temperature, high-pressure liquid refrigerant by condensers 12 fixed on both sides of frame 1. After passing through expansion valve 11, the medium-temperature, high-pressure liquid refrigerant rapidly depressurizes and cools down, transforming into a low-temperature, low-pressure gas-liquid mixture. The low-temperature, low-pressure gas-liquid mixture eventually enters the evaporator 8 tightly wrapped around the outer wall of the stirring box 9. Inside the evaporator 8, the refrigerant absorbs a large amount of heat from the wall of the stirring box 9 and vaporizes itself, thereby significantly reducing the wall temperature of the stirring box 9. The vaporized refrigerant is then drawn into the compressor 10 through pipes to begin the next cycle.

[0039] While cooling is in progress, the motor 501 installed on top of the mixing box 9 is started. The motor 501 drives the rotating rod 503 inside the fixed column 502, which in turn drives the sleeve rod 504 and the first rotating blade 505 and the second rotating blade 506 fixed on the sleeve rod 504 to rotate synchronously. The rotating first rotating blade 505 and the second rotating blade 506 continuously and three-dimensionally tumble the powder inside the mixing box 9. This tumbling action forcibly pushes the hot powder in the center of the mixing box 9 towards the inner wall of the mixing box 9, which is deeply cooled by the evaporator 8, while bringing the cooled powder back to the central area. Through this synergistic effect of internal stirring and external cooling, the entire batch of powder coating is rapidly and uniformly cooled, effectively avoiding the agglomeration of powder caused by local overheating or uneven cooling.

Claims

1. A powder coating preparation cooling device, comprising a frame (1) and a stirring box (9) fixed above the frame (1), wherein a stirring mechanism (5) is detachably connected to the top of the stirring box (9). The stirring mechanism (5) includes a fixed column (502), a motor (501) is fixedly connected to the top of the fixed column (502), the bottom of the fixed column (502) is fixed to the top of the stirring box (9), a rotating rod (503) is rotatably inserted inside the fixed column (502), the upper end of the rotating rod (503) is connected to the output shaft of the motor (501), a sleeve rod (504) is fixedly sleeved on the outside of the rotating rod (503), and a first rotating blade (505) and a second rotating blade (506) are fixedly welded to the outer wall of the sleeve rod (504). The mechanism is characterized in that... The device also includes a compressor (10), a condenser (12), an expansion valve (11), and an evaporator (8), the pipes of which are tightly wound around the outer wall of the mixing box (9).

2. The powder coating preparation cooling device according to claim 1, characterized in that, The device also includes a fan (7), which is fixed on the frame (1), and the air outlet of the fan (7) is connected to the side wall of the mixing box (9) through a pipe.

3. The powder coating preparation cooling device according to claim 1, characterized in that, A quick-release mechanism (6) is provided between the stirring mechanism (5) and the stirring box (9).

4. The powder coating preparation cooling device according to claim 3, characterized in that, The quick-release mechanism (6) includes an adjusting rod (601), a limiting post (602), and a spring (603). The adjusting rod (601) is rotatably connected to the sleeve rod (504). The limiting post (602) is driven to move by the adjusting rod (601). The spring (603) is fixed between the two limiting posts (602) and is squeezed or released by the limiting posts (602).

5. The powder coating preparation cooling device according to claim 1, characterized in that, The frame (1) has a feed inlet (3) at the top of one side and is connected to the mixing box (9) via a pipe. The frame (1) has a discharge outlet (4) at the bottom of the other side and is connected to the mixing box (9) via a pipe.

6. The powder coating preparation cooling apparatus according to claim 1, characterized in that, Casters (2) are fixedly connected to the four bottom corners of the frame (1).

7. The powder coating preparation cooling device according to claim 1, characterized in that, The compressor (10), the condenser (12), the expansion valve (11) and the evaporator (8) are connected in series through pipes to form a closed loop.

8. The powder coating preparation cooling apparatus according to claim 1, characterized in that, The condenser (12) is fixed symmetrically to the frame (1) from left to right.

9. The powder coating preparation cooling apparatus according to claim 1, characterized in that, The first rotating blade (505) and the second rotating blade (506) are staggered vertically along the axial direction of the sleeve (504).

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