阅读说明：本技术 一种聚酯亚胺类绝缘漆制备方法 (Preparation method of polyesterimide insulating paint ) 是由 刘俊华 何艺荣 于 2021-09-13 设计创作，主要内容包括：本发明涉及漆料制备技术领域,具体提出了一种聚酯亚胺类绝缘漆制备方法,且在方法中涉及到一种上述的快速冷却稀释釜,包括稀释釜本体、搅拌驱动组件、水冷搅拌桨和水路循环机构；所述水冷搅拌桨包括主轴、分液转子和管组组件；本发明提供的稀释釜对传统结构的稀释釜进行改进设计,将搅拌结构与冷却结构进行了整合设计,解决了传统的稀释釜单纯地依赖釜壁作为传热介质进行热交换冷却时存在的冷却效果不佳、冷却效率低的问题。(The invention relates to the technical field of paint preparation, and particularly provides a preparation method of a polyester imide insulating paint, and in the method, the rapid cooling dilution kettle comprises a dilution kettle body, a stirring driving assembly, a water-cooling stirring paddle and a waterway circulation mechanism; the water-cooling stirring paddle comprises a main shaft, a liquid separation rotor and a pipe group assembly; the diluting kettle provided by the invention is improved and designed for a diluting kettle with a traditional structure, and an agitating structure and a cooling structure are integrated and designed, so that the problems of poor cooling effect and low cooling efficiency when the traditional diluting kettle is simply used for heat exchange cooling by taking the kettle wall as a heat transfer medium are solved.)

1. A preparation method of polyester-imide insulating paint is characterized by comprising the following steps: the preparation method specifically comprises the following steps:

s1, preparing various reaction preparation materials required by preparing the polyester-imide insulating paint according to the proportion of the reaction formula;

s2, putting the reaction preparation materials, namely ethylene glycol, dimethyltryptamine and mosaic, into a reaction kettle according to a ratio, uniformly heating to 200 ℃, and carrying out an ester exchange reaction;

s3, after the ester exchange reaction is finished, cooling the reaction kettle to 160 ℃, equally dividing the materials trimellitic anhydride and dimethylamine prepared by the reaction into a plurality of parts, continuously adding the first part of the material into the reaction kettle, uniformly heating to 230 ℃, and carrying out imidization reaction;

s4, cooling to 160 ℃ after the first part of material finishes imidization, continuing to input the second part of material in the step S3, and repeating the operation of the step S3 until the plurality of parts of material are completely input;

s5, after the imidization reaction is completed through step-by-step feeding in the step S4, sampling and testing are carried out from the reaction kettle, heating is stopped after the imidization reaction is qualified, cresol and xylene are added for dissolving, and the dissolved reaction product is discharged to a quick cooling dilution kettle;

s6, continuously adding cresol, xylene, resin and additives into the rapid cooling dilution kettle, stirring and mixing for dilution, and then discharging the paint to a storage tank for storage after sampling and detecting viscosity and solid content are qualified;

the rapid cooling dilution kettle comprises a dilution kettle body (1), a stirring driving assembly (2), a water-cooling stirring paddle (3) and a waterway circulation mechanism (4); wherein:

the dilution kettle body (1) comprises an inner kettle body (11), an outer sleeve (12) sleeved and fixed outside the inner kettle body (11) and a top cover (13) arranged at the top end of the inner kettle body (11); a water cooling space for injecting cooling water is formed between the inner kettle body (11) and the outer sleeve (12); the stirring driving assembly (2) is assembled on the top cover (13) and the output end of the stirring driving assembly extends into the inner kettle body (11), and the water-cooling stirring paddle (3) comprises a main shaft (31), a liquid separation rotor (32) and a pipe assembly (33); the main shaft (31) is positioned in the inner kettle body (11) and is vertically and fixedly connected to the output end of the stirring driving assembly (2), the liquid separating rotor (32) is coaxially and fixedly connected to the bottom end of the main shaft (31), the liquid separating rotor (32) is vertically and rotatably installed between the bottom of the inner kettle body (11) and the bottom of the outer sleeve (12), the top end of the liquid separating rotor (32) upwards penetrates into the inner kettle body (11), and the bottom end of the liquid separating rotor (32) downwards penetrates out of the outer sleeve (12); the pipe group component (33) comprises two U-shaped main pipes (331) which are oppositely arranged, one end of each U-shaped main pipe (331) is fixedly connected with the liquid separating rotor (32), and the other end of each U-shaped main pipe (331) is fixed on the main shaft (31); a plurality of annular branch pipes (332) are connected between the two U-shaped main pipes (331) in a conduction manner, the annular branch pipes (332) are vertically distributed, and a plurality of pattern fins (333) which are uniformly distributed along the annular shape are uniformly sleeved outside the annular branch pipes (332); the inner cavity of the inner kettle body (11) is communicated with the outside of the outer sleeve (12) through the liquid separating rotor (32), and the U-shaped main pipe (331) is communicated with the water cooling space through the liquid separating rotor (32);

the waterway circulation mechanism (4) is positioned in the water-cooling space and is driven by the liquid-separating rotor (32).

2. The method for preparing the polyester imide insulating varnish as claimed in claim 1, wherein the method comprises the following steps: the liquid separating rotor (32) comprises a disc bin (321) with a cavity structure, a rotating drum (322) and a plurality of tubular columns (323); the disc bin (321) is positioned in an inner cavity of the inner kettle body (11) and is fixedly connected with the bottom end of the main shaft (31), the rotary drum (322) vertically rotates between the bottom of the inner kettle body (11) and the bottom of the outer sleeve (12), a plurality of tubular columns (323) are uniformly distributed around the disc bin (321) and are fixedly connected between the disc bin (321) and the rotary drum (322), the tubular columns (323) are communicated with the disc bin (321), and a plurality of liquid through ports (3221) which are communicated with the tubular columns (323) in a one-to-one correspondence manner are formed in the side wall part of the rotary drum (322) positioned in the cooling space; the U-shaped main pipe (331) is communicated with the disc bin (321).

3. The method for preparing the polyester imide insulating varnish as claimed in claim 2, wherein: the waterway circulating mechanism (4) comprises a driving fluted disc (41) and two circulating paddles (42), the driving fluted disc (41) is coaxially fixed on the rotary drum (322), and the liquid through port (3221) is positioned above the driving fluted disc (41); the side wall of the outer sleeve (12) is relatively provided with a liquid inlet port (121) and a liquid outlet port (122), the two circulating paddles (42) are vertically and rotatably mounted on the inner end surface of the outer sleeve (12), and the two circulating paddles (42) are respectively adjacently arranged at the position of the liquid inlet port (121) and the position of the liquid outlet port (122); and a driven gear (421) meshed with the driving fluted disc (41) is arranged on the circulating paddle (42).

4. The method for preparing the polyester imide insulating varnish as claimed in claim 1, wherein the method comprises the following steps: the stirring driving assembly (2) comprises a stirring motor (21) fixed to the top end of the top cover (13) and a connecting shaft (22) fixedly connected with an output shaft of the stirring motor (21), and the connecting shaft (22) is fixedly connected with the top end of the main shaft (31).

5. The method for preparing the polyester imide insulating varnish as claimed in claim 3, wherein the method comprises the following steps: a plurality of blades (422) are uniformly distributed on the circulating paddle (42) around the axial direction.

6. The method for preparing the polyester imide insulating varnish as claimed in claim 1, wherein the method comprises the following steps: the inner kettle body (11) is provided with a plurality of annular fins (111) on the outer side wall in the water cooling space, and the annular fins (111) are vertically distributed along the vertical direction.

7. The method for preparing the polyester imide insulating varnish as claimed in claim 2, wherein: and the rotary connection part of the rotary drum (322) and the inner kettle body (11) and the rotary connection part of the rotary drum and the outer sleeve (12) are subjected to waterproof sealing treatment.

8. The method for preparing the polyester imide insulating varnish as claimed in claim 1, wherein the method comprises the following steps: the top end of the top cover (13) is provided with a feeding port (131).

Technical Field

The invention relates to the technical field of paint preparation, and particularly provides a preparation method of a polyester-imide insulating paint.

Background

The insulating paint, also called insulating paint, is a paint with outstanding electrical insulation property and has good electrochemical property, thermal property, mechanical property and chemical property. The insulating paint is a special paint in a plurality of paints, and is an important insulating material which is based on high molecular polymers and can be cured into an insulating film or an insulating whole under certain conditions.

The insulating paint generally consists of a paint base, a solvent or a diluent and an auxiliary material, and can be divided into five types, namely impregnating varnish, wire enamel, covering varnish, silicon steel sheet varnish, anticorona varnish and the like according to the application range; the paint base material can be divided into polyester insulating paint, polyester-imide insulating paint, vertical insulating paint and the like, wherein the polyester-imide insulating paint is the insulating paint with the polyester-imide paint as the paint base.

In the production and preparation process of the polyester-imide insulating paint, the processing processes of raw material preparation, ester exchange reaction, imidization reaction and paint dilution are roughly carried out, the paint generated after imidization reaction in a reaction kettle is discharged into a dilution kettle for further dilution treatment, so that the diluted paint meets the viscosity requirement of the finished insulating paint; and carry out imidization in the reation kettle and go on under the heating environment, consequently drop into the paint vehicle temperature in the dilution cauldron higher, need cool off the processing in the dilution process to subsequent storage tank is stored to be convenient for. Under the prior art, be provided with the cooling jacket in diluting the cauldron to let in the cooling water and cool off through the heat exchange, but only carry out the heat exchange through interior cauldron wall as heat transfer medium in the diluting the cauldron of traditional structure, consequently the heat transfer effect is not good, and cooling efficiency is relatively poor.

Disclosure of Invention

In order to solve the above problems, the present invention provides a method for preparing a polyesterimide based insulating varnish, which is used to solve the above problems mentioned in the background art.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: a preparation method of polyester-imide insulating paint specifically comprises the following steps:

s1, preparing various reaction preparation materials required by preparing the polyester-imide insulating paint according to the proportion of the reaction formula;

s2, putting the reaction preparation materials, namely ethylene glycol, dimethyltryptamine and mosaic, into a reaction kettle according to a ratio, uniformly heating to 200 ℃, and carrying out an ester exchange reaction;

s3, after the ester exchange reaction is finished, cooling the reaction kettle to 160 ℃, equally dividing the materials trimellitic anhydride and dimethylamine prepared by the reaction into a plurality of parts, continuously adding the first part of the material into the reaction kettle, uniformly heating to 230 ℃, and carrying out imidization reaction;

s4, cooling to 160 ℃ after the first part of material finishes imidization, continuing to input the second part of material in the step S3, and repeating the operation of the step S3 until the plurality of parts of material are completely input;

s5, after the imidization reaction is completed through step-by-step feeding in the step S4, sampling and testing are carried out from the reaction kettle, heating is stopped after the imidization reaction is qualified, cresol and xylene are added for dissolving, and the dissolved reaction product is discharged to a quick cooling dilution kettle;

s6, continuously adding cresol, xylene, resin and additives into the rapid cooling dilution kettle, stirring and mixing for dilution, and then discharging the paint to a storage tank for storage after sampling and detecting viscosity and solid content are qualified;

the rapid cooling dilution kettle comprises a dilution kettle body, a stirring driving assembly, a water-cooling stirring paddle and a water path circulating mechanism, wherein the dilution kettle body is provided with a water inlet and a water outlet; wherein:

the dilution kettle body comprises an inner kettle body, an outer sleeve sleeved and fixed outside the inner kettle body and a top cover arranged at the top end of the inner kettle body; a water cooling space for injecting cooling water is formed between the inner kettle body and the outer sleeve; the stirring driving assembly is assembled on the top cover, the output end of the stirring driving assembly extends into the inner kettle body, and the water-cooling stirring paddle comprises a main shaft, a liquid separation rotor and a pipe assembly; the main shaft is positioned in the inner kettle body and is vertically and fixedly connected to the output end of the stirring driving assembly, the liquid separating rotor is coaxially and fixedly connected to the bottom end of the main shaft, the liquid separating rotor is vertically and rotatably installed between the bottom of the inner kettle body and the bottom of the outer sleeve, the top end of the liquid separating rotor upwards penetrates into the inner kettle body, and the bottom end of the liquid separating rotor downwards penetrates out of the outer sleeve; the pipe group assembly comprises two U-shaped main pipes which are oppositely arranged, one end of each U-shaped main pipe is fixedly connected with the liquid separating rotor, and the other end of each U-shaped main pipe is fixed on the main shaft; a plurality of annular branch pipes are connected between the two U-shaped main pipes in a conduction manner, the annular branch pipes are vertically distributed, and a plurality of pattern fins which are uniformly distributed along the annular shape are uniformly sleeved outside the annular branch pipes; the inner cavity of the inner kettle body is communicated with the outside of the outer sleeve through the liquid separating rotor, and the U-shaped main pipe is communicated with the water cooling space through the liquid separating rotor; the waterway circulation mechanism is positioned in the water-cooling space and is driven by the liquid-separating rotor.

Preferably, the liquid separating rotor comprises a disc bin with a cavity structure, a rotating drum and a plurality of tubular columns; the disc bin is positioned in the inner cavity of the inner kettle body and is fixedly connected with the bottom end of the main shaft, the rotary drum vertically rotates between the bottom of the inner kettle body and the bottom of the outer sleeve, a plurality of pipe columns are uniformly distributed around the disc bin and are fixedly connected between the disc bin and the rotary drum, the pipe columns are communicated with the disc bin, and a plurality of liquid through ports communicated with the pipe columns in a one-to-one correspondence manner are formed in the side wall part of the rotary drum positioned in the cooling space; the U-shaped main pipe is communicated with the disc bin.

Preferably, the waterway circulation mechanism comprises a driving fluted disc and two circulation paddles, the driving fluted disc is coaxially fixed on the rotary drum, and the liquid through port is positioned above the driving fluted disc; the side wall of the outer sleeve is relatively provided with a liquid inlet port and a liquid outlet port, the two circulating paddles are vertically and rotatably arranged on the inner end face of the outer sleeve, and the two circulating paddles are respectively adjacently arranged at the position of the liquid inlet port and the position of the liquid outlet port; and the circulating paddle is provided with a driven gear meshed with the driving fluted disc.

Preferably, the stirring driving assembly comprises a stirring motor fixed at the top end of the top cover and a connecting shaft fixedly connected with an output shaft of the stirring motor, and the connecting shaft is fixedly connected with the top end of the main shaft.

Preferably, a plurality of blades are uniformly distributed on the circulating paddle around the axial direction.

Preferably, the outer side wall of the inner kettle body in the water cooling space is provided with a plurality of annular fins, and the annular fins are vertically distributed along the vertical direction.

Preferably, the rotating connection part of the rotating drum and the inner kettle body and the rotating connection part of the outer sleeve are subjected to waterproof sealing treatment.

Preferably, the top end of the top cover is provided with a feeding port.

The technical scheme has the following advantages or beneficial effects: 1. the invention provides a preparation method of polyesterimide insulating paint, and particularly relates to a rapid cooling dilution kettle.

2. The invention provides a preparation method of polyesterimide insulating paint, and particularly relates to a rapid cooling dilution kettle.

3. The invention provides a preparation method of polyesterimide insulating paint, and particularly relates to a rapid cooling dilution kettle.

Drawings

The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The drawings, in which like numerals refer to like parts throughout the several views and which are not necessarily drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a flow chart of a method for preparing a polyesterimide type insulating varnish provided by the invention.

FIG. 2 is a schematic perspective view of a rapid cooling dilution kettle according to the present invention.

FIG. 3 is a schematic perspective structural view of a cross-sectional structure of a rapid cooling dilution kettle provided by the invention.

FIG. 4 is a plan view of a cross-sectional structure of a rapid cooling dilution kettle provided by the invention.

Fig. 5 is a schematic perspective view of a water-cooled stirring paddle.

FIG. 6 is a cross-sectional view of a water-cooled stirring paddle.

In the figure: 1. a dilution kettle body; 11. an inner kettle body; 111. an annular fin; 12. an outer sleeve; 121. a liquid inlet port; 122. a liquid outlet port; 13. a top cover; 131. a feeding port; 2. a stirring drive assembly; 21. a stirring motor; 22. a connecting shaft; 3. water-cooling stirring paddles; 31. a main shaft; 32. a liquid separating rotor; 321. a disc bin; 322. a rotating drum; 3221. a liquid through port; 323. a pipe string; 33. a tube set assembly; 331. a U-shaped main pipe; 332. an annular branch pipe; 333. pattern fins; 4. a waterway circulation mechanism; 41. a driving fluted disc; 42. a circulating paddle; 421. a driven gear; 422. a blade.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for the purpose of providing those skilled in the art with a more complete, accurate and thorough understanding of the concept and technical solution of the present invention, and to facilitate the implementation thereof, but not to limit the present invention.

As shown in figure 1, the preparation method of the polyester-imide insulating paint specifically comprises the following steps:

s1, preparing various reaction preparation materials required by preparing the polyester-imide insulating paint according to the proportion of the reaction formula;

s2, putting the reaction preparation materials, namely ethylene glycol, dimethyltryptamine and mosaic, into a reaction kettle according to a ratio, uniformly heating to 200 ℃, and carrying out an ester exchange reaction; the reaction kettle can directly use the reaction kettle structure used in the insulating paint preparation process in the prior art.

S3, after the ester exchange reaction is finished, cooling the reaction kettle to 160 ℃, equally dividing the materials trimellitic anhydride and dimethylamine prepared by the reaction into a plurality of parts, continuously adding the first part of the material into the reaction kettle, uniformly heating to 230 ℃, and carrying out imidization reaction;

s4, cooling to 160 ℃ after the first part of material finishes imidization, continuing to input the second part of material in the step S3, and repeating the operation of the step S3 until the plurality of parts of material are completely input;

s5, after the imidization reaction is completed through step-by-step feeding in the step S4, sampling and testing are carried out from the reaction kettle, heating is stopped after the imidization reaction is qualified, cresol and xylene are added for dissolving, and the dissolved reaction product is discharged to a quick cooling dilution kettle;

s6, continuously adding cresol, xylene, resin and additives into the rapid cooling dilution kettle, stirring and mixing for dilution, and then discharging the paint to a storage tank for storage after sampling and detecting viscosity and solid content are qualified;

as shown in fig. 2, fig. 3 and fig. 4, the rapid cooling dilution kettle comprises a dilution kettle body 1, a stirring driving assembly 2, a water-cooling stirring paddle 3 and a water path circulation mechanism 4, wherein the rapid cooling dilution kettle is used for rapidly cooling the polyester imine insulating paint in the steps S1-S6; wherein:

as shown in fig. 2 and 3, the dilution kettle body 1 comprises an inner kettle body 11, an outer sleeve 12 sleeved and welded outside the inner kettle body 11, and a top cover 13 arranged at the top end of the inner kettle body 11; a water cooling space for injecting cooling water is formed between the inner kettle body 11 and the outer sleeve 12; the outer side wall of the inner kettle body 11, which is positioned in the water cooling space, is provided with a plurality of annular fins 111, the plurality of annular fins 111 are vertically distributed along the vertical direction, and the plurality of annular fins 111 increase the thermal contact area between the wall of the inner kettle body 11 and the cooling space, so that the cooling effect is improved; the top end of the top cover 13 is provided with a feeding port 131, and the paint to be diluted and cresol, xylene, resin, additive and other materials for dilution can be fed from the feeding port 131.

As shown in fig. 3, the stirring driving assembly 2 is assembled on the top cover 13 and the output end extends into the inner kettle 11, and the stirring driving assembly 2 comprises a stirring motor 21 fixed on the top end of the top cover 13 by bolts and a connecting shaft 22 fixedly connected with the output shaft of the stirring motor 21. The stirring motor 21 is started to drive the connecting shaft 22 to rotate, so that the whole water-cooling stirring paddle 3 can be driven to stir to dilute, stir and mix the paint vehicle.

As shown in fig. 3, 5 and 6, the water-cooled stirring paddle 3 includes a main shaft 31, a liquid separation rotor 32 and a tube group assembly 33; the main shaft 31 is positioned in the inner kettle body 11, the top end of the main shaft is vertically and fixedly connected to the connecting shaft 22 through a bolt, the liquid separating rotor 32 is coaxially welded at the bottom end of the main shaft 31, the liquid separating rotor 32 is vertically and rotatably installed between the bottom of the inner kettle body 11 and the bottom of the outer sleeve 12, the top end of the liquid separating rotor 32 upwards penetrates into the inner kettle body 11, the bottom end of the liquid separating rotor 32 downwards penetrates out of the outer sleeve 12, and the liquid separating rotor 32 comprises a disc bin 321, a rotary drum 322 and a plurality of tubular columns 323 with a cavity structure; the disc bin 321 is positioned in the inner cavity of the inner kettle body 11 and welded with the bottom end of the main shaft 31, the rotating drum 322 vertically rotates between the bottom of the inner kettle body 11 and the bottom of the outer sleeve 12, the rotating connection part of the rotating drum 322 and the inner kettle body 11 and the rotating connection part of the outer sleeve 12 are subjected to waterproof sealing treatment, four pipe columns 323 are uniformly distributed around the disc bin 321 and welded between the disc bin 321 and the rotating drum 322, the pipe columns 323 are communicated with the disc bin 321, and the side wall part of the rotating drum 322 positioned in the cooling space is provided with four liquid through ports 3221 which are communicated with the four pipe columns 323 in a one-to-one correspondence manner; the tube group component 33 comprises two U-shaped main tubes 331 which are oppositely arranged, one end of each U-shaped main tube 331 is fixedly communicated with the disc bin 321, and the other end of each U-shaped main tube 331 is welded on the main shaft 31; three annular branch pipes 332 are connected between the two U-shaped main pipes 331 in a conduction manner, the three annular branch pipes 332 are vertically distributed, and a plurality of flower-shaped fins 333 which are uniformly distributed along the annular shape are uniformly sleeved outside the annular branch pipes 332; the inner cavity of the inner kettle body 11 is communicated with the outside of the outer sleeve 12 through the liquid separating rotor 32, and the U-shaped main pipe 331 is communicated with the water cooling space through the liquid separating rotor 32; the waterway circulation mechanism 4 is positioned in the water-cooling space and is driven by the liquid-separating rotor 32.

The separation of the paint flow path and the cooling water path is realized in the water-cooling stirring paddle 3 through the liquid separating rotor 32, specifically, the conduction between the inner kettle body 11 and the outer sleeve 12 is realized through the inner circular pipeline of the rotary drum 322, so that the diluted paint can be discharged, a control valve can be assembled in the inner circular pipeline of the rotary drum 322 for controlling the on-off of the paint path, and the conduction between the pipe group assembly 33 and the water-cooling space is realized through the communication between the liquid through port 3221 of the rotary drum 322 and the pipe column 323.

As shown in fig. 3 and 4, the waterway circulation mechanism 4 includes a driving fluted disc 41 and two circulation paddles 42, the driving fluted disc 41 is coaxially fixed on the drum 322, and the liquid through port 3221 is located above the driving fluted disc 41; the side wall of the outer sleeve 12 is relatively provided with a liquid inlet port 121 and a liquid outlet port 122, cooling water is introduced from the position of the liquid inlet port 121, the cooling water after heat exchange is discharged from the position of the liquid outlet port 122, the positions of the liquid inlet port 121 and the liquid outlet port 122 are communicated with an external existing water-cooled heat exchanger through pipelines to form a circulating water path, the two circulating paddles 42 are vertically and rotatably installed on the inner end surface of the outer sleeve 12, and the two circulating paddles 42 are respectively adjacently arranged at the position of the liquid inlet port 121 and the position of the liquid outlet port 122; the circulating paddle 42 is provided with a driven gear 421 meshed with the driving fluted disc 41; a plurality of blades 422 are uniformly distributed on the circulating propeller 42 around the axial direction.

The cooling water is filled in the entire water-cooled space and the entire pipe block 33 in the entire circulation water passage. When the paint to be diluted and the material for dilution are diluted and stirred in the dilution kettle, the stirring motor 21 is started to drive the connecting shaft 22 to rotate, so as to drive the whole water-cooling stirring paddle 3 to rotate, in the rotating process, the three annular branch pipes 332 are uniformly distributed in the vertical direction, and each annular branch pipe 332 is uniformly provided with a plurality of flower-shaped fins 333, so that on one hand, the pipe group assembly 33, especially the flower-shaped fins 333, uniformly stir the paint in the inner cavity of the whole inner kettle body 11 to promote the homogenization, dilution and mixing of each component in the paint, on the other hand, the pipe group assembly 33 is fully contacted with the paint while stirring in the paint, and the arrangement of the plurality of flower-shaped fins 333 further increases the contact area between the annular branch pipes 332 and the paint, and along with the flow of cooling water in the pipe group assembly 33, the pipe wall of the pipe group 33 as a thin-wall medium actively realizes heat exchange between the paint and the cooling water, and the heat exchange between the kettle wall of the inner kettle body 11 and the water cooling space is combined, so that the cooling effect and the cooling efficiency of the dilution kettle are greatly improved. When the water-cooling stirring paddle 3 performs rotary stirring, the driving fluted disc 41 is synchronously driven to rotate by the liquid-separating rotor 32, the driving fluted disc 41 drives the two circulating paddles 42 to rotate along with the driving fluted disc through the driven gear 421 meshed with the driving fluted disc, and the two circulating paddles 42 are respectively close to the liquid inlet port 121 and the liquid outlet port 122, so that the suction and discharge of cooling water can be enhanced, and the rapid flow of the cooling water in the pipe group assembly 33 is promoted, thereby achieving the purpose of rapid circulation of a water channel.

Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described in detail herein. Such variations do not affect the essence of the present invention and are not described herein.

The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; it will be understood by those skilled in the art that various changes and modifications may be made, or equivalents may be modified, without departing from the spirit of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.