Cooling device for powder coating preparation

By using rectangular feed pipe, rotary shaft and S-shaped stirring copper pipe in the powder coating cooling device, uniform stirring and heat absorption and cooling of the powder are achieved, and the problem of poor cooling effect of the inner powder in the prior art is solved. , improves cooling uniformity.

CN222210883UActive Publication Date: 2024-12-20TAISHAN HUALICAI HARDWARE DECORATION NEW MATERIAL CO LTD
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Patent Information

Application Number
CN202420103059.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-01-16
Publication Date
2024-12-20
Estimated Expiration
2034-01-16

AI Technical Summary

Technical Problem

During the cooling process of existing powder coating cooling devices, the outer powder can effectively absorb heat and cool down, while the inner powder has poor cooling effect, resulting in unsatisfactory cooling uniformity.

Method used

A cooling device for powder coating preparation is designed, using a rectangular feed pipe, rotary shaft, wall breaker, reflow cooling and stirring assembly and S-shaped stirring copper tube. The rotary shaft and wall breaker are driven by the driving motor to rotate, combining the rotating S-shaped Stir the copper tube and reflux cooling water to achieve uniform stirring of the powder and heat absorption and cooling.

Benefits of technology

It effectively avoids the temperatures of the outer and inner sides of the powder, improves the overall uniform cooling effect of the powder, and ensures the rapid and stable cooling of the powder.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a cooling device for powder coating preparation, which comprises a cooling box body, the bottom of the cooling box body is communicated and fixed with a discharge valve, the right side of the cooling box body is fixedly connected with a water tank, and the right side of the bottom of the water tank and the two sides of the bottom of the cooling box body are fixedly connected with two supporting legs. A rectangular feeding pipe is fixedly communicated with the left side of the top of the cooling box body, and the top of the rectangular feeding pipe is arranged to be of a bowl-cover-shaped structure. By arranging a series of structures, caked powder can be conveniently crushed during feeding, the powder can be conveniently stirred by means of rotating force during crushing, cooling water can be conveniently controlled to circularly flow in the S-shaped stirring copper pipe during stirring, and the effects that powder coating is directly stirred inside and heat is synchronously absorbed and cooled are achieved; the powder can be integrally and uniformly cooled through movement heat absorption and cooling, the phenomenon that the temperature of the powder on the outer side and the temperature of the powder on the inner side are different is effectively avoided, and the heat absorption and cooling uniformity is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of powder cooling equipment, in particular to a cooling device for preparing powder coatings. Background Art

[0002] With the sustained and stable growth of my country's economy and the continuous improvement of people's living standards, the powder coating business of metal components has also been increasing, especially in industries such as household appliances, instruments and meters, transportation facilities, aluminum profiles, various vehicles, and daily hardware. Powder coating can provide excellent anti-corrosion protection and decorative properties for metals; during the cooling process of polyethylene powder coating, some powder coating often accumulates into blocks, which brings great trouble to the cooling of powder coating.

[0003] In this regard, after searching, publication number CN212673636U discloses a cooling device for preparing powder coating from polyethylene, which includes a box body, a feeding pipe is opened on the top inner wall of the box body, a crushing groove is fixedly installed on the inner wall of the box body, a through hole is opened on the inner wall of the top of the box body, a motor is fixedly installed on the top of the box body, and a rotating rod is fixedly installed on the output shaft of the motor, the bottom end of the rotating rod passes through the through hole and extends into the crushing groove, and a cooling pipe is fixedly installed in an annular shape on the inner wall of the box body; it solves the shortcoming of the prior art that powder coating accumulates into blocks and cannot be well cooled, so that the powder coating can not only be completely crushed but also fully cooled, reducing the number of cooling times of the powder coating, greatly reducing the work tasks, and meeting people's needs.

[0004] The above patent is provided with a motor, a rotating rod and a crushing and stirring blade, which can crush the agglomerated powder when the agglomerated coating enters, and the cooling pipe provided on the inner wall of the box can absorb heat and cool the powder when the water flows, but there are still the following shortcomings:

[0005] 1. By fixing the cooling pipe on the inner wall of the box, the powder on the outside can absorb heat and cool down, but the heat absorption and cooling effect on the powder on the inside is poor, and the powder cannot be cooled down quickly and stably as a whole, and the cooling uniformity is not ideal. In view of its shortcomings, we redesigned it, so we proposed a cooling device for powder coating preparation to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a cooling device for preparing powder coatings to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cooling device for preparing powder coating, comprising a cooling box, the bottom of the cooling box is connected and fixed with a discharge valve, the right side of the cooling box is fixedly connected with a water tank, the right side of the bottom of the water tank and both sides of the bottom of the cooling box are fixedly connected with two legs, the top left side of the cooling box is connected and fixed with a rectangular feed pipe, the top of the rectangular feed pipe is set as a bowl-shaped structure, and the powder coating to be cooled is added into the cooling box by using the rectangular feed pipe;

[0008] The top of the cooling box is fixedly connected to a fixed box with an opening at the bottom, a return pipe is fixedly connected between the right inner wall of the fixed box and the top inner wall of the water tank, a rotating pipe is sealably and rotatably mounted on the top inner wall of the fixed box, a U-shaped seat is fixedly connected to the top of the fixed box, a water supply assembly is fixedly mounted on the top inner wall of the U-shaped seat, the rotating pipe seals and rotatably sleeves on the water supply assembly, the bottom end of the water supply assembly extends into the water tank, and the water supply assembly is used to supply water to the rotating pipe;

[0009] The rotating tube is provided with a fixed sleeve with a reflux cooling and stirring assembly, which is sealed and rotatably mounted on the top inner wall of the cooling box, and is connected to the interior of the fixed box. The reflux cooling and stirring assembly is used to supply water reflux and stir the powder coating when the rotating tube rotates, so as to achieve direct and uniform stirring and heat absorption and cooling inside.

[0010] The rotating tube is fixedly sleeved with a rotating drive assembly located in the U-shaped seat, the right inner wall of the rectangular feed tube is rotatably connected with a rotating shaft, the outer side of the rotating shaft is fixedly connected with a plurality of wall-breaking knives, the right end of the rotating shaft extends into the U-shaped seat and is fixedly connected to the rotating drive assembly, and the left side of the rectangular feed tube is fixedly installed with a driving motor with an output shaft fixedly connected to the left end of the rotating shaft, the driving motor is used to drive the rotating shaft to rotate, and the rotating shaft is used to drive the wall-breaking knives to rotate to break up the added agglomerated powder coating, and the rotating drive assembly is used to drive the rotating tube to rotate when the rotating shaft rotates.

[0011] Preferably, the water supply assembly includes a water pump fixedly mounted on the top inner wall of the U-shaped seat, the rotating tube seal rotating sleeve is arranged on the water outlet of the water pump, the water inlet of the water pump extends to the outside of the U-shaped seat and is connected and fixed with an L-shaped tube, and the bottom end of the L-shaped tube extends into the water tank; the arranged water pump and the L-shaped tube cooperate, and the water pump is used to draw water in the water tank through the L-shaped tube and pump it into the rotating tube.

[0012] Preferably, the reflux cooling and stirring assembly includes a T-tube and a cross tube fixedly mounted on the rotating tube, both ends of the cross tube and the two ends of the T-tube are arranged as blocking structures, the T-tube is sealingly and rotatably mounted on the top inner wall of the cooling box, the top end of the T-tube is connected to the inside of the fixed box, and a plurality of S-shaped stirring copper tubes are connected and fixed between the bottom inner wall of the T-tube and the top inner wall of the cross tube; the arranged T-tube, S-shaped stirring copper tube and cross tube cooperate to synchronously drive the T-tube, S-shaped stirring copper tube and cross tube to rotate when the rotating tube rotates, the water in the rotating tube enters the cross tube, and then flows back to the T-tube upwards through a plurality of S-shaped stirring copper tubes, and then flows upwards into the fixed box, and then flows back to the water tank through the reflux pipe for recycling, and the rotation of the S-shaped stirring copper tube is coordinated with the internal circulating water to realize the direct and uniform stirring of the powder coating inside and the synchronous heat absorption and cooling.

[0013] Preferably, the rotary drive assembly includes a first bevel gear fixedly mounted on the rotating tube, a second bevel gear is meshed on the left side of the first bevel gear, the left side of the second bevel gear is fixedly connected to the right end of the rotating shaft, and the second bevel gear and the first bevel gear are both located in a U-shaped seat; the first bevel gear and the second bevel gear cooperate to drive the rotating tube to rotate when the rotating shaft rotates.

[0014] Preferably, a rotation hole is opened on the top inner wall of the fixed box, and a first sealing bearing is fixedly sleeved in the rotation hole, and the inner ring of the first sealing bearing is fixedly sleeved with the outer side of the rotating tube.

[0015] Preferably, a circular hole is opened on the top inner wall of the cooling box body, and a second sealed bearing is fixedly sleeved in the circular hole, and the inner ring of the second sealed bearing is fixedly sleeved with the outer side of the T-shaped tube.

[0016] Preferably, a water filling pipe is connected and fixed to the right side of the top of the water tank, the water tank is filled with cooling water, and a drain valve is connected and fixed to the bottom of the rear side of the water tank.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. This cooling device for preparing powder coatings can drive the rotating shaft and the crushing knife to rotate when the driving motor is started, so as to achieve the effect of crushing the agglomerated powder when feeding, by cooperating with the driving motor, the rotating shaft, the crushing knife and the rectangular feeding pipe;

[0019] 2. The cooling device for preparing powder coating can drive the S-shaped stirring copper tube to rotate and stir the powder by means of the rotating shaft, rotating tube, water tank, fixed box, reflux pipe, water supply assembly, reflux cooling stirring assembly and rotary drive assembly, and can control the circulation of cooling water in the S-shaped stirring copper tube. By the rotation and stirring of the S-shaped stirring copper tube and the circulation of cooling water inside the tube, the powder coating can be directly stirred internally and heat absorbed and cooled simultaneously. The powder can be evenly cooled as a whole by heat absorption and cooling through motion, which effectively avoids the phenomenon of different temperatures between the outer and inner powders and improves the uniformity of heat absorption and cooling.

[0020] The utility model is provided with a series of structures, which is convenient for breaking up agglomerated powder during feeding, for stirring the powder by utilizing the rotational force during breaking up, and for controlling the circulation of cooling water in the S-shaped stirring copper tube during stirring, thereby achieving the effect of directly stirring the powder coating internally and absorbing heat and cooling simultaneously. The powder can be evenly cooled as a whole through absorbing heat and cooling by absorbing heat through movement, thereby effectively avoiding the phenomenon of different temperatures of the powder on the outside and the powder on the inside, and improving the uniformity of absorbing heat and cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0022] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0023] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of part A in the figure.

[0024] In the figure: 1. cooling box; 2. T-shaped tube; 3. rotating tube; 4. horizontal tube; 5. S-shaped stirring copper tube; 6. fixing box; 7. U-shaped seat; 8. water pump; 9. L-shaped tube; 10. reflux pipe; 11. water tank; 12. rectangular feed pipe; 13. driving motor; 14. rotating shaft; 15. wall-breaking knife; 16. second bevel gear; 17. first bevel gear. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figures 1 to 3As shown, a cooling device for preparing powder coating proposed in this embodiment includes a cooling box body 1, a discharge valve is fixedly connected to the bottom of the cooling box body 1, a water tank 11 is fixedly connected to the right side of the cooling box body 1, two legs are fixedly connected to the right side of the bottom of the water tank 11 and both sides of the bottom of the cooling box body 1, a water filling pipe is fixedly connected to the right side of the top of the water tank 11, the water tank 11 is filled with cooling water, a drain valve is fixedly connected to the bottom of the rear side of the water tank 11, the water filling pipe is used to add water to the water tank 11, and the drain valve is used to discharge the water in the water tank 11 when the water is changed later, and a rectangular feed pipe 12 is fixedly connected to the left side of the top of the cooling box body 1, and the top of the rectangular feed pipe 12 is set as a bowl-shaped structure, and the rectangular feed pipe 12 is used to feed water to the cooling box 1 Powder coating to be cooled is added therein; a fixing box 6 with an opening at the bottom is fixedly connected to the top of the cooling box body 1, a return pipe 10 is fixedly connected between the right inner wall of the fixing box 6 and the top inner wall of the water tank 11, a rotating tube 3 is sealed and rotatably installed on the top inner wall of the fixing box 6, wherein a rotating hole is opened on the top inner wall of the fixing box 6, and a first sealing bearing is fixedly sleeved in the rotating hole, the inner ring of the first sealing bearing is fixedly sleeved on the outer side of the rotating tube 3, which plays the effect of sealing and rotatably installing the rotating tube 3, a U-shaped seat 7 is fixedly connected to the top of the fixing box 6, a water supply component is fixedly installed on the top inner wall of the U-shaped seat 7, the rotating tube 3 is sealed and rotatably sleeved on the water supply component, the bottom end of the water supply component extends into the water tank 11, and the water supply component is used to supply water to the rotating tube 3;

[0027] A reflux cooling and stirring assembly is provided on the fixed sleeve of the rotating tube 3. The reflux cooling and stirring assembly is sealed and rotatably installed on the top inner wall of the cooling box body 1. The reflux cooling and stirring assembly is connected to the interior of the fixed box 6. The reflux cooling and stirring assembly is used to supply water for reflux and stir the powder coating when the rotating tube 3 rotates, so as to realize direct and uniform stirring, heat absorption and cooling inside; a rotating drive assembly is provided on the fixed sleeve of the rotating tube 3, and a rotating shaft 14 is rotatably connected to the inner wall of the right side of the rectangular feed pipe 12. A plurality of wall-breaking knives 15 are fixedly connected to the outer side of the rotating shaft 14. The right end of the rotating shaft 14 extends into the U-shaped seat 7 and is fixedly connected to the rotating drive assembly. The left side of the rectangular feed pipe 12 A driving motor 13 is fixedly installed with an output shaft fixedly connected to the left end of the rotating shaft 14, wherein circular through holes are opened on the inner walls on both sides of the rectangular feed tube 12 and the inner wall on the left side of the U-shaped seat 7, and support bearings are fixedly sleeved in the circular through holes. The inner rings of the two support bearings on the right side are fixedly fitted with the outer side of the rotating shaft 14, and the inner ring of the support bearing on the left side is fixedly fitted with the outer side of the output shaft of the driving motor 13, which has the effect of rotatably installing the rotating shaft 14. The driving motor 13 is used to drive the rotating shaft 14 to rotate, and the rotating shaft 14 is used to drive the wall breaking knife 15 to rotate to crush the added agglomerated powder coating. The rotating drive component is used to drive the rotating tube 3 to rotate when the rotating shaft 14 rotates.

[0028] Specifically, the water supply component includes a water pump 8 fixedly mounted on the inner wall of the top of the U-shaped seat 7, and the rotating tube 3 is sealed and rotated on the water outlet of the water pump 8, wherein a third sealing bearing is fixedly mounted inside the rotating tube 3, and the inner ring of the third sealing bearing is fixedly mounted on the outer side of the water outlet of the water pump 8, and the rotating tube 3 is sealed and rotated on the water outlet of the water pump 8 through the third sealing bearing, which has the effect of sealing and rotating the rotating tube 3. The water inlet of the water pump 8 extends to the outside of the U-shaped seat 7 and is connected and fixed with an L-shaped tube 9, and the bottom end of the L-shaped tube 9 extends into the water tank 11; the arranged water pump 8 and the L-shaped tube 9 cooperate, and the water pump 8 is used to draw water in the water tank 11 through the L-shaped tube 9 and pump it into the rotating tube 3.

[0029] Furthermore, the reflux cooling and stirring assembly includes a T-tube 2 and a transverse tube 4 fixedly sleeved on the rotating tube 3, both ends of the transverse tube 4 and the two ends of the T-tube 2 are arranged as blocking structures, the T-tube 2 is sealed and rotatably mounted on the top inner wall of the cooling box body 1, wherein a circular hole is opened on the top inner wall of the cooling box body 1, and a second sealing bearing is fixedly sleeved in the circular hole, and the inner ring of the second sealing bearing is fixedly sleeved on the outer side of the T-tube 2, so as to achieve the effect of sealing and rotatably mounting the T-tube 2, the top end of the T-tube 2 is connected to the inside of the fixed box 6, and a plurality of S-shaped bearings are connected and fixed between the bottom inner wall of the T-tube 2 and the top inner wall of the transverse tube 4 shaped stirring copper tube 5; the T-tube 2, S-shaped stirring copper tube 5 and the horizontal tube 4 are coordinated, and when the rotating tube 3 rotates, the T-tube 2, S-shaped stirring copper tube 5 and the horizontal tube 4 can be synchronously driven to rotate, and the water in the rotating tube 3 enters the horizontal tube 4, and then flows back to the T-tube 2 through multiple S-shaped stirring copper tubes 5, and then flows upward into the fixed box 6, and then flows back to the water tank 11 through the reflux pipe 10 for recycling. The rotation of the S-shaped stirring copper tube 5 is coordinated with the internal circulating water to achieve uniform stirring of the powder coating directly inside and simultaneous heat absorption and cooling, and the heat absorption and cooling uniformity is improved by the integrated movement during stirring.

[0030] Furthermore, the rotation drive assembly includes a first bevel gear 17 fixedly mounted on the rotating tube 3, a second bevel gear 16 meshing on the left side of the first bevel gear 17, and a left side of the second bevel gear 16 is fixedly connected to the right end of the rotating shaft 14, and the second bevel gear 16 and the first bevel gear 17 are both located in the U-shaped seat 7; the first bevel gear 17 and the second bevel gear 16 cooperate with each other, and when the rotating shaft 14 rotates, the second bevel gear 16 can be driven to rotate, and the second bevel gear 16 drives the first bevel gear 17 to rotate, and the rotating tube 3 is driven to rotate by utilizing the rotating first bevel gear 17, and the rotating shaft 14 drives the wall breaking knife 15 to rotate, so as to achieve the effect of single drive for crushing and controlling the synchronous rotation of the rotating tube 3.

[0031] The method of using the present embodiment is as follows: when in use, the driving motor 13 and the water pump 8 are started, and when the driving motor 13 is started, the rotating shaft 14 is driven to rotate, and the rotating shaft 14 drives the wall-breaking knife 15 to rotate, and the powder coating to be cooled is added into the rectangular feeding tube 12, and at this time, the rotating multiple wall-breaking knives 15 break the agglomerated powder, and the broken powder flows downward into the cooling box 1, so as to achieve the effect of breaking the agglomerated powder when adding the material;

[0032] When the rotating shaft 14 rotates, it also drives the second bevel gear 16 to rotate. The second bevel gear 16 drives the rotating tube 3 to rotate through the first bevel gear 17. The rotating tube 3 drives the horizontal tube 4 and the T-shaped tube 2 to rotate. The T-shaped tube 2 and the horizontal tube 4 simultaneously drive the multiple S-shaped stirring copper tubes 5 to rotate, so as to achieve the effect of single-drive integrated crushing and stirring. When the water pump 8 is started, the cooling water in the water tank 11 is extracted through the L-shaped tube 9 and pumped into the rotating tube 3. The cooling water then enters the horizontal tube 4, and then flows back upward to the T-shaped tube 2 through the multiple S-shaped stirring copper tubes 5, and then enters the fixed box upward. 6, and then refluxes to the water tank 11 through the reflux pipe 10 for recycling. The S-shaped stirring copper tube 5 is rotated and stirred to cooperate with the cooling water circulating inside it to achieve the effect of directly stirring the powder coating inside and absorbing heat and cooling it synchronously. The synchronous heat absorption during stirring is used to achieve the motion heat absorption and cooling effect. The motion heat absorption and cooling achieved by stirring heat absorption can evenly cool the powder as a whole, effectively avoid the phenomenon of different temperatures of the powder on the outside and the powder on the inside, and improve the uniformity of heat absorption and cooling. After cooling, the discharge valve can be opened to discharge the powder coating.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cooling device for preparing powder coatings, comprising a cooling box (1), wherein a discharge valve is fixedly connected to the bottom of the cooling box (1), characterized in that: The right side of the cooling box (1) is fixedly connected to a water tank (11); the right side of the bottom of the water tank (11) and both sides of the bottom of the cooling box (1) are fixedly connected to two legs; the left side of the top of the cooling box (1) is connected and fixedly connected to a rectangular feed pipe (12); the top of the rectangular feed pipe (12) is arranged as a bowl-shaped structure; The top of the cooling box (1) is fixedly connected to a fixed box (6) with an opening at the bottom, a return pipe (10) is fixedly connected between the right inner wall of the fixed box (6) and the top inner wall of the water tank (11), a rotating pipe (3) is sealingly rotatably mounted on the top inner wall of the fixed box (6), a U-shaped seat (7) is fixedly connected to the top of the fixed box (6), a water supply component is fixedly mounted on the top inner wall of the U-shaped seat (7), the rotating pipe (3) is sealingly rotatably sleeved on the water supply component, and the bottom end of the water supply component extends into the water tank (11); A reflux cooling and stirring assembly is fixedly sleeved on the rotating tube (3), and the reflux cooling and stirring assembly is sealed and rotatably mounted on the top inner wall of the cooling box (1), and the reflux cooling and stirring assembly is connected to the interior of the fixed box (6); A rotating drive assembly located in the U-shaped seat (7) is fixedly sleeved on the rotating tube (3); a rotating shaft (14) is rotatably connected to the right inner wall of the rectangular feeding tube (12); a plurality of wall-breaking knives (15) are fixedly connected to the outer side of the rotating shaft (14); the right end of the rotating shaft (14) extends into the U-shaped seat (7) and is fixedly connected to the rotating drive assembly; a driving motor (13) whose output shaft is fixedly connected to the left end of the rotating shaft (14) is fixedly installed on the left side of the rectangular feeding tube (12).

2. A cooling device for preparing powder coating according to claim 1, characterized in that: The water supply assembly comprises a water pump (8) fixedly mounted on the inner wall of the top of the U-shaped seat (7); the rotating pipe (3) is sealingly and rotatably sleeved on the water outlet of the water pump (8); the water inlet of the water pump (8) extends outside the U-shaped seat (7) and is connected and fixedly connected to an L-shaped pipe (9); the bottom end of the L-shaped pipe (9) extends into the water tank (11).

3. A cooling device for preparing powder coating according to claim 2, characterized in that: The reflux cooling stirring assembly comprises a T-shaped tube (2) and a transverse tube (4) fixedly mounted on a rotating tube (3); both ends of the transverse tube (4) and both ends of the T-shaped tube (2) are provided with blocking structures; the T-shaped tube (2) is sealed and rotatably mounted on the top inner wall of the cooling box (1); the top end of the T-shaped tube (2) is connected to the inside of a fixed box (6); and a plurality of S-shaped stirring copper tubes (5) are connected and fixed between the bottom inner wall of the T-shaped tube (2) and the top inner wall of the transverse tube (4).

4. A cooling device for preparing powder coating according to claim 3, characterized in that: The rotary drive assembly comprises a first bevel gear (17) fixedly sleeved on the rotating tube (3); a second bevel gear (16) is meshed on the left side of the first bevel gear (17); the left side of the second bevel gear (16) is fixedly connected to the right end of the rotating shaft (14); and the second bevel gear (16) and the first bevel gear (17) are both located in the U-shaped seat (7).

5. A cooling device for preparing powder coating according to claim 1, characterized in that: A rotation hole is provided on the inner wall of the top of the fixed box (6), and a first sealing bearing is fixedly sleeved in the rotation hole. The inner ring of the first sealing bearing is fixedly sleeved on the outer side of the rotating tube (3).

6. A cooling device for preparing powder coating according to claim 3, characterized in that: A circular hole is provided on the inner wall of the top of the cooling box body (1), and a second sealing bearing is fixedly sleeved in the circular hole, and the inner ring of the second sealing bearing is fixedly sleeved on the outer side of the T-shaped tube (2).

7. A cooling device for preparing powder coating according to claim 1, characterized in that: A water supply pipe is connected and fixed to the right side of the top of the water tank (11), the water tank (11) is filled with cooling water, and a drain valve is connected and fixed to the bottom of the rear side of the water tank (11).