A reaction kettle for producing waterborne polyurethane coating

Abstract

The utility model relates to the field of paint production discloses a kind of reaction kettle of waterborne polyurethane paint production, including mounting bracket, the top of mounting bracket is fixedly installed with kettle body, the top of kettle body is fixedly installed with kettle cover, the outer wall of kettle cover is provided with stirring assembly, the outer wall of kettle cover is provided with anti-blocking component, the lower surface of kettle body is penetrated and fixedly connected with discharge pipe, the outer wall of discharge pipe is provided with valve;The stirring assembly includes motor, and the motor is arranged on the upper surface of kettle cover.In the utility model, by the cooperation design of guiding ball in stirring assembly and front low rear high annular closed guide groove, the reciprocating sliding of stirring rod is realized while being driven to rotate, so that the raw materials in different height regions in kettle body can be fully stirred by stirring blade, effectively eliminate stirring dead angle, improve raw material mixing uniformity, and then guarantee the performance stability of reaction efficiency and final waterborne polyurethane paint product.

Description

Technical Field

[0001] This utility model relates to the field of coating production, and in particular to a reaction vessel for the production of waterborne polyurethane coatings. Background Technology

[0002] Waterborne polyurethane coatings have been widely used in various fields such as construction, automobiles, and furniture due to their many advantages, including being environmentally friendly and pollution-free, having excellent film-forming properties, and strong adhesion. Market demand continues to rise.

[0003] As a key piece of equipment in the production process of waterborne polyurethane coatings, the performance of the reactor directly determines the quality of the final product. It mainly undertakes processes such as mixing raw materials and chemical reactions, providing a stable and suitable reaction environment for coating production.

[0004] However, conventional reaction vessels used for the production of waterborne polyurethane coatings still have shortcomings in practical applications.

[0005] First, the stirring mechanism of traditional reactors is mostly a single rotary stirring mode, with a fixed movement trajectory of the stirring blades. This makes it difficult to cover raw materials at different heights and in different areas within the reactor, easily leading to dead zones in the stirring. This results in uneven mixing of raw materials, which not only reduces reaction efficiency but also affects the performance stability of the final coating product. At the same time, the feeding structure of conventional reactors lacks an effective anti-adhesion design. During the feeding process, coating raw materials are prone to sticking to the inner wall of the feeding channel, resulting in insufficient feeding and waste of raw materials. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a reaction vessel for the production of waterborne polyurethane coatings, which aims to improve the problems of uneven mixing caused by dead zones in the existing traditional reaction vessels, as well as insufficient feeding and waste of raw materials due to the adhesion of raw materials during feeding.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a reaction vessel for producing waterborne polyurethane coatings, comprising a mounting frame, a vessel body fixedly mounted on the top of the mounting frame, a vessel cover fixedly mounted on the top of the vessel body, a stirring assembly provided on the outer wall of the vessel cover, an anti-clogging assembly provided on the outer wall of the vessel cover, a discharge pipe penetrating and fixedly connected to the lower surface of the vessel body, and a valve provided on the outer wall of the discharge pipe; The stirring assembly includes a motor, which is disposed on the upper surface of the vessel lid. The output shaft of the motor is fixedly connected to a rotating shaft, and a stirring rod is slidably connected through the lower surface of the rotating shaft. A stirring blade is fixedly connected to the outer wall of the stirring rod.

[0008] As a further description of the above technical solution: The stirring assembly also includes a connecting rod, which is fixedly connected to the upper part of the outer wall of the stirring rod. A rotating rod is fixedly connected to the end of the connecting rod away from the stirring rod. A guide ball is rotatably connected to the outer wall of the rotating rod. A guide ring is provided on the upper part of the inner wall of the vessel, and a guide groove is provided on the lower surface of the guide ring.

[0009] As a further description of the above technical solution: The anti-clogging component includes a funnel that penetrates and is fixedly connected to the inner wall of the vessel lid. A dust cover is rotatably mounted on the upper surface of the funnel. A sleeve is fixedly connected to the left surface of the rotating shaft. An impact element is elastically connected to the right end of the inner wall of the sleeve via a compression spring.

[0010] As a further description of the above technical solution: The bottom of the inner wall of the vessel is designed to be concave, with a lower center and higher edges.

[0011] As a further description of the above technical solution: The rotating shaft passes through and is rotatably connected to the inner wall of the kettle lid. Multiple sets of stirring blades are provided, and the multiple sets of stirring blades are distributed at equal intervals on the outer wall of the stirring rod.

[0012] As a further description of the above technical solution: The top of the outer wall of the stirring rod is provided with a protruding sliding key, and the inner wall of the rotating shaft is provided with a sliding groove, and the sliding key is slidably connected to the inner wall of the sliding groove.

[0013] As a further description of the above technical solution: Both the guide ring and the guide groove are configured as a closed annular shape with a lower front and a higher back. The guide ball is spherical and slides on the inner wall of the guide groove, with the center of the guide ball always located inside the guide groove.

[0014] As a further description of the above technical solution: The striking element is slidably connected to the left surface of the sleeve, and the left half of the rear surface of the striking element is set as an inclined surface that gradually slopes backward from left to right.

[0015] This utility model has the following beneficial effects: 1. In this utility model, the guide ball in the stirring assembly is designed to cooperate with the annular closed guide groove that is lower in the front and higher in the back, so that the stirring rod can slide up and down while rotating. This allows the stirring blade to fully stir the raw materials in different height areas of the reactor, effectively eliminating dead corners in the stirring, improving the uniformity of the raw material mixing, and thus ensuring the reaction efficiency and the performance stability of the final waterborne polyurethane coating product.

[0016] 2. In this utility model, by means of the linkage structure of the sleeve, compression spring and striking component in the anti-blocking component, the outer wall of the funnel is cyclically struck. The vibration causes the material adhering to the funnel to loosen and fall, avoiding the phenomenon of material adhesion during the feeding process, ensuring sufficient feeding and reducing raw material waste. Attached Figure Description

[0017] Figure 1 This is a front view of the three-dimensional structure of the overall device in this utility model; Figure 2 This is a three-dimensional cross-sectional view of the vessel body and vessel lid in this utility model; Figure 3 This is a three-dimensional cross-sectional diagram of the rotating shaft, funnel, and sleeve in this utility model. Figure 4 This is a three-dimensional cross-sectional diagram of the guide ring and guide ball in this utility model.

[0018] Legend: 1. Mounting bracket; 2. Kettle body; 3. Kettle cover; 4. Stirring assembly; 41. Motor; 42. Rotating shaft; 43. Stirring rod; 44. Stirring blade; 45. Connecting rod; 46. Rotating rod; 47. Guide ball; 48. Guide ring; 49. Guide groove; 5. Anti-clogging assembly; 51. Funnel; 52. Dust cover; 53. Sleeve; 54. Compression spring; 55. Impacting component; 6. Discharge pipe. Detailed Implementation

[0019] 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.

[0020] Reference Figures 1-2This utility model provides an embodiment of a reaction vessel for producing waterborne polyurethane coatings, including a mounting frame 1. The mounting frame 1 provides a stable mounting support foundation for the entire reaction vessel. The mounting frame 1 is directly installed on the ground to support the overall device. A vessel body 2 is fixedly installed at the top of the mounting frame 1. The vessel body 2 serves as the core reaction container for the production of waterborne polyurethane coatings, providing a closed and suitable space for the mixing and reaction of coating raw materials. The bottom of the inner wall of the vessel body 2 is designed to be concave, with a lower center and higher edges. This concavity allows the reactants to naturally converge at the bottom of the vessel body 2, facilitating subsequent discharge operations. A vessel body is fixedly installed at the top of the vessel body 2. The lid 3 is used to seal the vessel body 2, preventing material splashing or harmful gas leakage during the reaction. The lid 3 is fixed to the vessel body 2 with bolts and can be disassembled. The outer wall of the lid 3 is equipped with a stirring component 4, which can also stir the raw materials during stirring, so that different raw materials are evenly mixed, improving the reaction efficiency and the uniformity of the reaction products. The outer wall of the lid 3 is equipped with an anti-blocking component 5, which is used to prevent materials from sticking in the feeding channel during the feeding process, resulting in insufficient feeding. The lower surface of the vessel body 2 is penetrated and fixedly connected to a discharge pipe 6. The outer wall of the discharge pipe 6 is equipped with a valve to control the opening and closing of the discharge pipe 6.

[0021] Reference Figures 1-3 The stirring assembly 4 includes a motor 41, which serves as the power source for the stirring assembly 4, providing driving force for the entire stirring action. The motor 41 is mounted on the upper surface of the vessel lid 3. The output shaft of the motor 41 is fixedly connected to a rotating shaft 42, which passes through and is rotatably connected to the inner wall of the vessel lid 3. A stirring rod 43 is slidably connected through the lower surface of the rotating shaft 42. The rotating shaft 42 is used to transmit the power of the motor 41 to the stirring rod 43, causing the stirring rod 43 to rotate synchronously. A protruding sliding key is provided at the top of the outer wall of the stirring rod 43. The inner wall of the rotating shaft 42... A sliding groove is provided, and a sliding key is slidably connected to the inner wall of the sliding groove. The cooperation design of the sliding key and the sliding groove can ensure that the rotating shaft 42 drives the stirring rod 43 to rotate synchronously, and also allow the stirring rod 43 to slide up and down relative to the rotating shaft 42. The outer wall of the stirring rod 43 is fixedly connected to the stirring blades 44, which are in direct contact with the raw materials. There are multiple sets of stirring blades 44, which are distributed at equal intervals on the outer wall of the stirring rod 43. The multiple sets of equally distributed stirring blades 44 can cover material areas at different heights inside the vessel 2, avoiding the formation of dead zones in the stirring.

[0022] Reference Figures 2-4The stirring assembly 4 also includes a connecting rod 45, which is fixedly connected to the upper part of the outer wall of the stirring rod 43. A rotating rod 46 is fixedly connected to the end of the connecting rod 45 away from the stirring rod 43. The connecting rod 45 is used to connect the stirring rod 43 and the rotating rod 46. A guide ball 47 is rotatably connected to the outer wall of the rotating rod 46. The guide ball 47 is used to drive the rotating rod 46 to move up and down. A guide ring 48 is provided on the upper part of the inner wall of the vessel body 2. A guide groove 49 is opened on the lower surface of the guide ring 48 to provide a fixed trajectory for the sliding of the guide ball 47. Both the guide ring 48 and the guide groove 49 are set to a closed annular shape with a lower front and a higher back. This can guide the guide ball 47 to move up and down along the height of the groove while rotating with the rotating rod 46. The guide ball 47 is spherical and slides on the inner wall of the guide groove 49. The center of the guide ball 47 is always located in the guide groove 49, ensuring that the guide ball 47 always slides in contact with the inner wall of the guide groove 49, avoiding deviating from the trajectory and ensuring the stability of the up and down movement of the stirring rod 43.

[0023] Reference Figures 1-3 The anti-clogging component 5 includes a funnel 51, which is connected to the inner wall of the vessel lid 3. The funnel 51 guides the feed, and its conical structure allows the material to enter the vessel body 2 quickly and in a concentrated manner. A dust cover 52 is rotatably mounted on the upper surface of the funnel 51. The dust cover 52 is used to close the feed port of the funnel 51 when no material is being fed, preventing external dust and impurities from entering the vessel body 2 and contaminating the reaction material. A sleeve 53 is fixedly connected to the left surface of the rotating shaft 42, and the right end of the inner wall of the sleeve 53 passes through... The compression spring 54 is elastically connected to the striking element 55. The compression spring 54 provides elastic restoring force to the striking element 55, ensuring that the striking element 55 can quickly return to its original position after striking. The striking element 55 is used to cyclically strike the outer wall of the funnel 51. The vibration loosens and drops the material accumulated in the funnel 51, preventing residue. The striking element 55 is slidably connected to the left surface of the sleeve 53. The left half of the rear surface of the striking element 55 is set as a slope that gradually slopes backward from left to right. The slope is used to provide guidance.

[0024] Working principle: First, when feeding, open the dust cover 52 of the anti-blocking component 5 and put the paint raw material into the vessel 2 through the funnel 51. The conical structure of the funnel 51 guides the material to quickly concentrate into the vessel 2. After feeding, close the dust cover 52 to prevent impurities from entering. Start the motor 41 of the stirring component 4. The output shaft of the motor 41 drives the rotating shaft 42 to rotate. The rotating shaft 42 drives the stirring rod 43 to rotate. The multiple sets of stirring blades 44 on the outer wall of the stirring rod 43 rotate accordingly, stirring and mixing the raw materials at different heights in the vessel 2 to avoid the formation of stirring dead zones.

[0025] Furthermore, when the stirring rod 43 rotates, it will also drive the connecting rod 45 and the rotating rod 46 to rotate synchronously. The guide ball 47 on the outer wall of the rotating rod 46 slides in the guide groove 49 of the guide ring 48. Since the guide ring 48 and the guide groove 49 are closed rings with the front lower and the back higher, the guide ball 47 moves up and down with the height of the groove as it slides along the guide groove 49. In turn, the rotating rod 46 and the connecting rod 45 drive the stirring rod 43 to slide up and down relative to the rotating shaft 42, so that the stirring blade 44 can tumble up and down while rotating and stirring, further improving the uniformity of the raw material mixing and ensuring the reaction efficiency and product uniformity.

[0026] During this process, the rotating shaft 42 rotates synchronously, driving the sleeve 53 to rotate. As the sleeve 53 rotates, the striking element 55 repeatedly strikes the outer wall of the funnel 51, causing the material adhering to the funnel 51 to loosen and fall through the vibration, thus avoiding residue.

[0027] After the reaction is complete, open the valve on the outer wall of the discharge pipe 6, and the finished product is discharged through the discharge pipe 6.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reaction vessel for producing waterborne polyurethane coatings, comprising a mounting frame (1), characterized in that: The top of the mounting bracket (1) is fixedly mounted with a vessel body (2), the top of the vessel body (2) is fixedly mounted with a vessel lid (3), the outer wall of the vessel lid (3) is provided with a stirring assembly (4), the outer wall of the vessel lid (3) is provided with an anti-blocking assembly (5), the lower surface of the vessel body (2) is penetrated and fixedly connected with a discharge pipe (6), and the outer wall of the discharge pipe (6) is provided with a valve; The stirring assembly (4) includes a motor (41), which is located on the upper surface of the lid (3). The output shaft of the motor (41) is fixedly connected to a rotating shaft (42). The lower surface of the rotating shaft (42) is slidably connected to a stirring rod (43), and the outer wall of the stirring rod (43) is fixedly connected to a stirring blade (44).

2. The reaction vessel for producing waterborne polyurethane coatings according to claim 1, characterized in that: The stirring assembly (4) also includes a connecting rod (45), which is fixedly connected to the upper part of the outer wall of the stirring rod (43). A rotating rod (46) is fixedly connected to the end of the connecting rod (45) away from the stirring rod (43). A guide ball (47) is rotatably connected to the outer wall of the rotating rod (46). A guide ring (48) is provided on the upper part of the inner wall of the vessel body (2). A guide groove (49) is provided on the lower surface of the guide ring (48).

3. The reaction vessel for producing waterborne polyurethane coatings according to claim 1, characterized in that: The anti-clogging component (5) includes a funnel (51) that is connected to the inner wall of the lid (3) through the funnel (51). A dust cover (52) is rotatably installed on the upper surface of the funnel (51). A sleeve (53) is fixedly connected to the left surface of the rotating shaft (42). An impacting element (55) is elastically connected to the right end of the inner wall of the sleeve (53) through a compression spring (54).

4. The reaction vessel for producing waterborne polyurethane coatings according to claim 1, characterized in that: The bottom of the inner wall of the vessel body (2) is set to be concave, with a low center and a high perimeter.

5. The reaction vessel for producing waterborne polyurethane coatings according to claim 1, characterized in that: The rotating shaft (42) passes through and is rotatably connected to the inner wall of the lid (3). Multiple sets of stirring blades (44) are provided, and the multiple sets of stirring blades (44) are distributed at equal intervals on the outer wall of the stirring rod (43).

6. The reaction vessel for producing waterborne polyurethane coatings according to claim 1, characterized in that: The top of the outer wall of the stirring rod (43) is provided with a protruding sliding key, and the inner wall of the rotating shaft (42) is provided with a sliding groove, and the sliding key is slidably connected to the inner wall of the sliding groove.

7. The reaction vessel for producing waterborne polyurethane coatings according to claim 2, characterized in that: The guide ring (48) and guide groove (49) are both configured as a closed annular shape with a lower front and a higher back. The guide ball (47) is configured as a sphere. The guide ball (47) slides on the inner wall of the guide groove (49), and the center of the guide ball (47) is always located in the guide groove (49).

8. The reaction vessel for producing waterborne polyurethane coatings according to claim 3, characterized in that: The striking element (55) is slidably connected to the left surface of the sleeve (53), and the left half of the rear surface of the striking element (55) is configured as an inclined surface that gradually slopes backward from left to right.

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