A nano passivation coating for FW500 galvanized sheet surface

Abstract

The invention discloses a nano passivation coating for the surface of a FW500 galvanized sheet. The coating is prepared by coating a nano passivation coating on the surface of the FW500 galvanized sheet and then drying the coating. The nano passivation coating is mainly prepared from a water-based polyester resin, a water-based amino resin, an aliphatic dibasic acid ester, a nano filler, a colored pigment, a silane coupling agent, a processing aid and water. The nano filler is mixed with a nano graphene powder and a nano silicon dioxide powder in a mass ratio of 1:(4-5), and the nano filler accounts for 3-8wt.% of the total mass of the coating. The graphene powder used in the coating for the nano passivation coating in the invention has a layered structure and can be laid flat on the surface of a material; the nano silicon dioxide powder used has a spherical structure and can be filled in the gaps between the graphene lamellar structures, so that the lamellar structure and the spherical structure fill the surface of the protected material, and the corrosion resistance of the galvanized sheet can be enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of galvanized sheet coatings, and in particular to a nano passivation coating used on the surface of a FW500 galvanized sheet. Background Art

[0002] FW500 galvanized metal sheets are widely used in automobiles, building materials, home appliances, containers, etc. due to their good corrosion resistance and low price. However, galvanized metal sheets are prone to corrosion in a humid environment, forming white corrosion products on their surface or turning gray, which affects the appearance quality of the galvanized metal sheets and the corrosion resistance of the coating.

[0003] In order to solve the above technical problems, the existing technology currently adopts the method of color coating on the surface of FW500 galvanized sheet for corrosion protection, but there is still the problem of poor corrosion resistance, especially poor acid and alkali resistance.

[0004] Therefore, how to provide a nano passivation coating for the surface of FW500 galvanized sheet to solve the problems existing in the prior art is of great significance to its application. Summary of the invention

[0005] In view of this, the purpose of this application is to provide a nano passivation coating for the surface of FW500 galvanized sheet to solve the problem that the existing technology adopts the method of color coating on the surface of FW500 galvanized sheet for corrosion protection, but still has poor corrosion resistance, especially poor acid and alkali resistance.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A nano passivation coating for the surface of a FW500 galvanized sheet. The coating is prepared by coating a nano passivation coating on the surface of the FW500 galvanized sheet and then drying the coating. The nano passivation coating is mainly prepared from a water-based polyester resin, a water-based amino resin, an aliphatic dibasic acid ester, a nano filler, a colored pigment, a silane coupling agent, a processing aid and water. The nano filler is prepared by mixing nano graphene powder and nano silicon dioxide powder in a mass ratio of 1:(4-5), and the nano filler accounts for 3-8wt.% of the total mass of the coating.

[0008] Preferably, the particle size of the nano-graphene powder is 80-150 nm, and the particle size of the nano-silicon dioxide powder is 50-80 nm.

[0009] Preferably, the nano passivation coating is composed of the following components in total mass percentage: 35-45wt.% of water-based polyester resin, 5-10wt.% of water-based amino resin, 3-8wt.% of aliphatic dibasic acid ester, 3-8wt.% of nano filler, 5-8wt.% of colored pigment, 2-3wt.% of silane coupling agent, 1-3wt.% of processing aid and balance water.

[0010] Preferably, the water-based polyester resin has a solid hydroxyl value of 50-150 mgKOH / g, a weight average molecular weight of 2000-8000, a Tg of 50-80°C, and the water-based polyester resin is at least one of an acrylic acid-modified polyester resin and an unsaturated acid anhydride-modified polyester resin; and the water-based amino resin is at least one of a melamine formaldehyde water-based resin, a methylated amino water-based resin, and a butylated amino water-based resin.

[0011] Preferably, the aliphatic dibasic acid ester is at least two of dimethyl glutarate, dimethyl succinate and dimethyl adipate.

[0012] Preferably, the processing aids include defoamers, leveling agents and wax slurry.

[0013] Preferably, the coating is stirred and mixed by a mixing device, and the mixed coating is coated on the surface of the FW500 galvanized sheet by roller coating, and the coating thickness is 8-20 μm.

[0014] Preferably, the mixing device comprises a base plate, a mixing barrel is placed on one side of the top of the base plate, and a lifting column is installed on the other side of the top of the base plate, the telescopic end of the lifting column is fixedly connected to the support plate, and a motor is installed at the bottom end of one side of the support plate, and the output end of the motor is transmission connected with a transmission shaft, and the other side of the support plate is rotatably connected with a rotating seat 1 and a rotating seat 2, and the rotating seat 1 and the rotating seat 2 are slidably connected with a stirring rod 1 and a stirring shaft 2, and the bottom ends of the stirring rod 1 and the stirring shaft 2 are respectively fixedly connected with a dispersion disk 1 and a dispersion disk 2, and the top ends of the stirring rod 1 and the stirring shaft 2 are respectively fixedly connected with a synchronous gear 2 and a synchronous gear 1, and the synchronous gear 2 is meshed with the synchronous gear 1, and the top end of the rotating seat 2 is fixedly connected with a transmission sprocket, and a driving sprocket is installed in the middle of the transmission shaft, and the driving sprocket and the transmission sprocket are transmission-connected by a transmission chain.

[0015] Preferably, the middle parts of the rotating seat 1 and the rotating seat 2 are hollow, and the middle parts of the rotating seat 1 and the rotating seat 2 are both provided with protrusions, and the surfaces of the stirring rod 1 and the stirring shaft 2 are both provided with vertical sliding grooves, and the protrusions are slidably connected to the sliding grooves.

[0016] Preferably, the back side of the top end of the support plate is fixedly connected with a vertical rod and a vertical plate, the back side of the vertical plate is rotatably connected with a driving pulley, the driving pulley is coaxially connected with a transmission gear, the top end of the transmission shaft is equipped with a driving gear, the driving gear is meshed with the transmission gear, the back side of the top end of the vertical rod is rotatably connected with a transmission pulley, the driving pulley and the transmission pulley are connected via a transmission belt, the transmission pulley is coaxially connected with an articulated rod 1, and the middle part of the vertical rod is rotatably connected with an articulated rod 2 One end of the hinged rod 2 is hinged to the hinged rod 1 through a connecting rod 3, and a slide rail 1 and a slide rail 2 are installed on the front of the vertical rod. The slide rail 1 and the slide rail 2 are respectively slidably connected with a slider 1 and a slider 1, and the slider 1 and the slider 2 are respectively fixedly connected with a connecting block 1 and a connecting block 2. The connecting block 1 is rotatably connected to the top end of the stirring rod 1, and the connecting block 2 is rotatably connected to the top end of the stirring shaft 2. The connecting block 1 is rotatably connected to the hinged rod 2 through a connecting rod 1, and the connecting block 2 is rotatably connected to the hinged rod 2 through a connecting rod 2.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The graphene powder used in the nano passivation coating of the present invention has a layered structure and can be spread on the surface of the material; the nano silicon dioxide powder used has a spherical structure and can be filled in the gaps between the graphene lamellar structures, so that the lamellar structure and the spherical structure fill the surface of the protected material, which can enhance the corrosion resistance of the galvanized sheet.

[0019] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings as follows.

[0020] Based on the detailed description of the specific embodiments of the present application in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0022] Figure 1 is the total mass percentage table of the coating in the present invention;

[0023] Figure 2 is a structural diagram of the coating in the present invention;

[0024] Figure 3 is a structural diagram of the mixing device in the present invention;

[0025] Figure 4 It is a partial structural diagram of the mixing device in the present invention.

[0026] In the figure: 1. bottom plate; 2. lifting column; 3. motor; 4. transmission shaft; 5. driving sprocket; 6. driving gear; 7. driving pulley; 8. transmission gear; 9. transmission chain; 10. transmission belt; 11. vertical rod; 12. transmission sprocket; 13. synchronous gear one; 14. synchronous gear two; 15. support plate; 16. stirring rod one; 17. mixing barrel; 18. dispersion disk one; 19. dispersion disk two; 20. stirring shaft two; 21. rotating seat one; 22. slide rail two; 23. slider two; 24. connecting block two; 25. connecting rod two; 26. connecting rod three; 27. hinged rod one; 28. driving pulley; 29. ​​vertical plate; 30. hinged rod two; 31. slide rail one; 32. slider one; 33. connecting rod one; 34. connecting block one; 35. rotating seat two. DETAILED DESCRIPTION

[0027] To make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all of the embodiments. In the following description, specific details such as specific configuration and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures is omitted in the embodiment.

[0028] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0029] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0030] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusions.

[0031] See also Figure 1-4 The present invention provides a technical solution for a nano passivation coating on the surface of a FW500 galvanized sheet: the coating is mainly prepared from a water-based polyester resin, a water-based amino resin, an aliphatic dibasic acid ester, a nano filler, a colored pigment, a silane coupling agent, a processing aid and water, and the nano filler is mixed with nano graphene powder and nano silicon dioxide powder in a mass ratio of 1: (4-5), and the nano filler accounts for 3-8wt.% of the total mass of the coating.

[0032] The particle size of the nano-graphene powder is 80-150nm, and the particle size of the nano-silicon dioxide powder is 50-80nm.

[0033] The coating is composed of the following components in total weight percentage: 35-45wt.% of water-based polyester resin, 5-10wt.% of water-based amino resin, 3-8wt.% of aliphatic dibasic acid ester, 3-8wt.% of nanofiller, 5-8wt.% of colored pigment, 2-3wt.% of silane coupling agent, 1-3wt.% of processing aid and balance water.

[0034] The waterborne polyester resin has a solid hydroxyl value of 50-150 mgKOH / g, a weight average molecular weight of 2000-8000, and a Tg of 50-80°C, and the waterborne polyester resin is at least one of an acrylic acid-modified polyester resin and an unsaturated acid anhydride-modified polyester resin; and the waterborne amino resin is at least one of a melamine formaldehyde waterborne resin, a methyl etherified amino waterborne resin, and a butyl etherified amino waterborne resin.

[0035] The aliphatic dibasic acid ester is at least two of dimethyl glutarate, dimethyl succinate and dimethyl adipate.

[0036] Processing aids include defoamers, leveling agents and wax slurries.

[0037] The coating is stirred and mixed by a mixing device, and the mixed coating is coated on the surface of the FW500 galvanized sheet by roller coating, and the coating thickness is 8-20 μm.

[0038] The mixing device comprises a bottom plate 1, a mixing barrel 17 is placed on one side of the top of the bottom plate 1, a lifting column 2 is installed on the other side of the top of the bottom plate 1, a telescopic end of the lifting column 2 is fixedly connected to a support plate 15, a motor 3 is installed at the bottom end of one side of the support plate 15, and a transmission shaft 4 is transmission-connected to the output end of the motor 3, a rotating seat 21 and a rotating seat 2 35 are rotationally connected to the other side of the support plate 15, a stirring rod 16 and a stirring shaft 2 20 are slidingly connected to the rotating seat 1 21 and the rotating seat 2 35, a stirring rod 16 and a stirring shaft 2 20 are respectively fixedly connected to a dispersion disk 18 and a dispersion disk 2 19 at the bottom ends of the stirring rod 16 and the stirring shaft 2 20, a synchronous gear 2 14 and a synchronous gear 13 are respectively fixedly connected to the top ends of the stirring rod 16 and the stirring shaft 2 20, the synchronous gear 2 14 is meshed with the synchronous gear 13, a transmission sprocket 12 is fixedly connected to the top end of the rotating seat 2 35, a driving sprocket 5 is installed in the middle of the transmission shaft 4, and the driving sprocket 5 and the transmission sprocket 12 are transmission-connected through a transmission chain 9.

[0039] The middle parts of the rotating seat 1 21 and the rotating seat 2 35 are hollow, and the rotating seat 1 21 and the rotating seat 2 35 are both provided with protrusions in the middle parts. The surfaces of the stirring rod 1 16 and the stirring shaft 2 20 are both provided with vertical slide grooves, and the protrusions are slidably connected with the slide grooves.

[0040] In this embodiment, the raw materials are then put into the mixing barrel 17, and then the motor 3 is started. At this time, the motor 3 drives the driving sprocket 5 and the driving gear 6 to rotate through the transmission shaft 4. At this time, the driving sprocket 5 drives the driving sprocket 12 to rotate through the transmission chain 9, and the transmission sprocket 12 drives the rotating seat 2 35 to rotate. The rotating seat 2 35 drives the rotating seat 1 21 to rotate through the synchronous gear 2 14 and the synchronous gear 1 13, thereby driving the stirring rod 1 16 and the stirring shaft 2 20 to rotate. The stirring rod 16 and the stirring shaft 2 20 respectively drive the dispersion disk 1 18 and the dispersion disk 2 19 to evenly stir, mix and disperse the raw materials.

[0041] The top back of the support plate 15 is fixedly connected with the vertical rod 11 and the vertical plate 29, the back of the vertical plate 29 is rotatably connected with the driving pulley 7, the driving pulley 7 is coaxially connected with the driving gear 8, the top of the transmission shaft 4 is equipped with a driving gear 6, the driving gear 6 is meshed with the driving gear 8, the top back of the vertical rod 11 is rotatably connected with the driving pulley 28, the driving pulley 28 is connected to the driving pulley 7 through the driving belt 10, the driving pulley 28 is coaxially connected with the hinged rod 1 27, the middle part of the vertical rod 11 is rotatably connected with the hinged rod 2 30, and one end of the hinged rod 2 30 is connected to the hinged rod 1 The connecting rod 3 26 is hinged with the hinge rod 1 27, and the front of the vertical rod 11 is installed with a slide rail 1 31 and a slide rail 22. The slide rail 1 31 and the slide rail 2 22 are respectively slidably connected with a slider 1 32 and a slider 1 32. The slider 1 32 and the slider 2 23 are respectively fixedly connected with a connecting block 1 34 and a connecting block 2 24. The connecting block 1 34 is rotatably connected to the top end of the stirring rod 1 16, and the connecting block 2 24 is rotatably connected to the top end of the stirring shaft 2 20. The connecting block 1 34 and the hinged rod 2 30 are rotatably connected through the connecting rod 1 33, and the connecting block 2 24 and the hinged rod 2 30 are rotatably connected through the connecting rod 2 25.

[0042] In this embodiment, the driving gear 6 drives the transmission gear 8 to rotate, the transmission gear 8 drives the driving pulley 7 to rotate, the driving pulley 7 drives the transmission pulley 28 to rotate through the transmission belt 10, the transmission pulley 28 drives the articulated rod 1 27 to rotate, the articulated rod 1 27 drives the articulated rod 2 30 to swing continuously through the connecting rod 3 26, and the two ends of the articulated rod 2 30 drive the connecting block 1 34 and the connecting block 2 24 to slide up and down through the connecting rod 1 33 and the connecting rod 2 25 respectively. At this time, the stirring rod 1 16 and the stirring shaft 2 20 slide up and down, so that the dispersion disk 1 18 and the dispersion disk 2 19 move up and down, thereby stirring the raw materials more evenly.

[0043] When used specifically, the raw materials of the coating are first weighed according to the ratio of 35-45wt.% of water-based polyester resin, 5-10wt.% of water-based amino resin, 3-8wt.% of aliphatic dibasic acid ester, 3-8wt.% of nano filler, 5-8wt.% of colored pigment, 2-3wt.% of silane coupling agent, 1-3wt.% of processing aid and the balance of water, and then the raw materials are put into the mixing barrel 17, and then the motor 3 is started, at which time the motor 3 drives the driving sprocket 5 and the driving gear 6 to rotate through the transmission shaft 4, at which time the driving sprocket 5 drives the driving sprocket 12 to rotate through the transmission chain 9, and the driving sprocket 12 drives the rotating seat 2 35 to rotate, and the rotating seat 2 35 drives the rotating seat 1 21 to rotate through the synchronous gear 2 14 and the synchronous gear 1 13, thereby driving the stirring rod 16 and the stirring shaft 2 20 to rotate, and the stirring The mixing rod 16 and the stirring shaft 20 drive the dispersion plate 18 and the dispersion plate 2 19 to uniformly stir, mix and disperse the raw materials. At the same time, the driving gear 6 drives the transmission gear 8 to rotate, the transmission gear 8 drives the driving pulley 7 to rotate, the driving pulley 7 drives the transmission pulley 28 to rotate through the transmission belt 10, the transmission pulley 28 drives the hinged rod 1 27 to rotate, the hinged rod 1 27 drives the hinged rod 2 30 to swing continuously through the connecting rod 3 26, and the two ends of the hinged rod 2 30 drive the connecting block 1 34 and the connecting block 2 24 to slide up and down through the connecting rod 1 33 and the connecting rod 2 25 respectively. At this time, the stirring rod 16 and the stirring shaft 20 slide up and down, so that the dispersion plate 18 and the dispersion plate 2 19 move up and down, thereby stirring the raw materials more evenly. The finished coating product after stirring is applied to the surface of the FW500 galvanized sheet.

[0044] The above description is only the preferred embodiment of the present invention, which does not limit the protection scope of the present invention. For those skilled in the art, the present invention can be modified and varied in various ways. Within the spirit and principle of the present invention, any change, modification, replacement, integration and parameter change of these embodiments by conventional substitution or capable of achieving the same function without departing from the principle and spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A nano passivation coating for the surface of FW500 galvanized sheet, characterized by: The coating is prepared by coating a nano-passivation coating on the surface of a FW500 galvanized sheet and then drying it. The nano-passivation coating is mainly prepared from a water-based polyester resin, a water-based amino resin, an aliphatic dibasic acid ester, a nano-filler, a colored pigment, a silane coupling agent, a processing aid and water. The nano-filler is mixed with nano-graphene powder and nano-silicon dioxide powder in a mass ratio of 1:(4-5), and the nano-filler accounts for 3-8wt.% of the total mass of the coating.

2. A nano passivation coating for the surface of FW500 galvanized sheet as claimed in claim 1, characterized in that: The particle size of the nano-graphene powder is 80-150nm, and the particle size of the nano-silicon dioxide powder is 50-80nm.

3. A nano passivation coating for the surface of FW500 galvanized sheet as claimed in claim 2, characterized in that: The nano passivation coating is composed of the following components in terms of total mass percentage: 35-45wt.% of waterborne polyester resin, 5-10wt.% of waterborne amino resin, 3-8wt.% of aliphatic dibasic acid ester, 3-8wt.% of nano filler, 5-8wt.% of colored pigment, 2-3wt.% of silane coupling agent, 1-3wt.% of processing aid and the balance of water.

4. A nano passivation coating for the surface of FW500 galvanized sheet as claimed in claim 3, characterized in that: The water-based polyester resin has a solid hydroxyl value of 50-150 mgKOH / g, a weight average molecular weight of 2000-8000, and a Tg of 50-80°C, and the water-based polyester resin is at least one of an acrylic acid-modified polyester resin and an unsaturated acid anhydride-modified polyester resin; and the water-based amino resin is at least one of a melamine formaldehyde water-based resin, a methyl etherified amino water-based resin, and a butyl etherified amino water-based resin.

5. A nano passivation coating for the surface of FW500 galvanized sheet as claimed in claim 4, characterized in that: The aliphatic dibasic acid ester is at least two of dimethyl glutarate, dimethyl succinate and dimethyl adipate.

6. A nano passivation coating for the surface of FW500 galvanized sheet as claimed in claim 5, characterized in that: The processing aids include defoamers, leveling agents and wax slurries.

7. A nano passivation coating for the surface of FW500 galvanized sheet as claimed in claim 6, characterized in that: The coating is stirred and mixed by a mixing device, and the mixed coating is coated on the surface of the FW500 galvanized sheet by roller coating, and dried at 150-250° C. to obtain a nano passivation coating, and the coating thickness is 8-20 μm.

8. The nano passivation coating for the surface of FW500 galvanized sheet according to claim 7, characterized in that: The mixing device comprises a bottom plate (1), a mixing barrel (17) is placed on one side of the top of the bottom plate (1), a lifting column (2) is installed on the other side of the top of the bottom plate (1), the telescopic end of the lifting column (2) is fixedly connected to a support plate (15), a motor (3) is installed at the bottom end of one side of the support plate (15), the output end of the motor (3) is transmission-connected to a transmission shaft (4), the other side of the support plate (15) is rotationally connected to a rotating seat 1 (21) and a rotating seat 2 (35), the rotating seat 1 (21) and the rotating seat 2 (35) are slidably connected to a stirring rod 1 (16) and a stirring shaft 2 (20 ), the bottom ends of the stirring rod 1 (16) and the stirring shaft 2 (20) are fixedly connected to the dispersion disk 1 (18) and the dispersion disk 2 (19) respectively, the top ends of the stirring rod 1 (16) and the stirring shaft 2 (20) are fixedly connected to the synchronous gear 2 (14) and the synchronous gear 1 (13) respectively, the synchronous gear 2 (14) is meshingly connected with the synchronous gear 1 (13), the top end of the rotating seat 2 (35) is fixedly connected to the transmission sprocket (12), the middle part of the transmission shaft (4) is installed with a driving sprocket (5), and the driving sprocket (5) and the transmission sprocket (12) are connected by a transmission chain (9).

9. A nano passivation coating for the surface of FW500 galvanized sheet as claimed in claim 8, characterized in that: The middle parts of the rotating seat 1 (21) and the rotating seat 2 (35) are hollow, and the middle parts of the rotating seat 1 (21) and the rotating seat 2 (35) are both provided with protruding blocks, and the surfaces of the stirring rod 1 (16) and the stirring shaft 2 (20) are both provided with vertical sliding grooves, and the protruding blocks are slidably connected to the sliding grooves.

10. A nano passivation coating for the surface of FW500 galvanized sheet as claimed in claim 9, characterized in that: The top back of the support plate (15) is fixedly connected to a vertical rod (11) and a vertical plate (29); the back of the vertical plate (29) is rotatably connected to a driving pulley (7); the driving pulley (7) is coaxially connected to a transmission gear (8); the top of the transmission shaft (4) is provided with a driving gear (6); the driving gear (6) is meshedly connected to the transmission gear (8); the top back of the vertical rod (11) is rotatably connected to a driving pulley (28); the driving pulley (28) and the driving pulley (7) are connected to each other via a transmission belt (10); the driving pulley (28) is coaxially connected to a hinged rod 1 (27); the middle of the vertical rod (11) is rotatably connected to a hinged rod 2 (30); one end of the hinged rod 2 (30) is The vertical rod (11) is hinged to the hinge rod (27) through the connecting rod (3) (26), and the front of the vertical rod (11) is equipped with a slide rail (31) and a slide rail (22). The slide rail (31) and the slide rail (22) are respectively slidably connected to the slider (32) and the slider (32). The slider (32) and the slider (23) are respectively fixedly connected to the connecting block (34) and the connecting block (24). The connecting block (34) is rotatably connected to the top end of the stirring rod (16), and the connecting block (24) is rotatably connected to the top end of the stirring shaft (20). The connecting block (34) and the hinge rod (30) are rotatably connected through the connecting rod (33), and the connecting block (24) and the hinge rod (30) are rotatably connected through the connecting rod (25).

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