Mixing device for preparing waterborne polyurethane coating

Abstract

The utility model belongs to the technical field of coating mixing equipment, in particular to a mixing device for preparing a waterborne polyurethane coating, which is characterized in that a discharge pipeline is arranged at the bottom of a mixing cylinder, a transition hole is formed in the top end of the mixing cylinder, and a moving plate is connected in the mixing cylinder in a sliding manner and is driven by a first power device; a feeding pipeline is arranged on the movable plate, and a feeding cylinder is arranged on the feeding pipeline; a stirring shaft is rotationally connected to the moving plate and is driven by a second power device; a connecting plate is arranged on the stirring shaft, stirring blades are arranged at the bottom of the connecting plate, a mounting groove is formed in the connecting plate, a scraping plate matched with the inner side wall of the mixing barrel is connected in the mounting groove in a sliding manner, and a reset spring is arranged between the scraping plate and the mounting groove.

Description

Technical Field

[0001] The utility model belongs to the technical field of coating mixing equipment, and particularly relates to a mixing device for preparing waterborne polyurethane coatings. Background Technique

[0002] Polyurethane waterproof coating is a prepolymer containing isocyanate groups formed by the addition polymerization reaction of isocyanates, polyethers, etc., and is formulated with catalysts, anhydrous auxiliaries, anhydrous fillers, solvents, etc. through processes such as mixing to produce one-component polyurethane waterproof coatings. This type of coating is a reaction-curing type coating with characteristics such as high strength, large elongation, and good water resistance, and has strong adaptability to the deformation of the base layer. Polyurethane waterproof coating is a one-component environmentally friendly waterproof coating for liquid construction, with imported polyurethane prepolymer as the basic component and no additives such as tar and asphalt. It cures after contacting the moisture in the air and forms a firm, tough, seamless and integral waterproof film on the surface of the base layer. A stirring and mixing device is required when preparing the waterproof coating.

[0003] Due to the relatively large viscosity of polyurethane waterproof coating, it will adhere to the inner wall of the mixing tank during mixing, and it is easy to have the situation of coating hanging on the wall when discharging. In order to solve this problem, the traditional stirring and mixing device scrapes the sticky coating hanging on the wall by adding a scraper. However, due to the wear of the scraper during long-term use, the scraper cannot contact the inner side wall of the mixing tank.

[0004] At present, the stirring shaft is fixedly arranged, and the stirring range is also fixed. This method will cause the phenomenon of uneven stirring. Content of the Utility Model

[0005] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a mixing device for preparing waterborne polyurethane coatings, which solves the above technical problems.

[0006] The solution adopted by the utility model is: a mixing device for preparing waterborne polyurethane coatings, including a mixing cylinder and a moving plate, characterized in that:

[0007] A discharge pipeline is provided at the bottom of the mixing cylinder, and a transition hole is opened at the top. A moving plate is slidably connected inside the mixing cylinder, and the moving plate is driven by a first power device;

[0008] The moving plate is provided with a feed pipeline, and a feed cylinder is provided on the feed pipeline;

[0009] A stirring shaft is rotatably connected to the moving plate, and the stirring shaft is driven by a second power device;

[0010] A connecting plate is provided on the stirring shaft. Stirring blades are provided at the bottom of the connecting plate. An installation groove is formed in the connecting plate. A scraping plate that cooperates with the inner side wall of the mixing cylinder is slidably connected in the installation groove. A return spring is provided between the scraping plate and the installation groove.

[0011] Preferably, the first power device includes a sliding groove formed in the inner side wall of the mixing cylinder. An auxiliary frame that cooperates with the sliding groove is provided on the moving plate. A telescopic plate is provided between the sliding groove and the auxiliary frame.

[0012] A connecting frame is provided on the mixing cylinder. A screw rod is rotatably connected between the connecting frame and the top of the mixing cylinder. The screw rod is threadedly connected to the auxiliary frame. A first motor is provided on the connecting frame. The screw rod is driven by the first motor. The first motor is electrically connected to the controller.

[0013] Preferably, two groups of connecting frames are provided on the mixing cylinder. A screw rod is rotatably connected between one group of the connecting frames and the mixing cylinder. A guide rod is fixedly connected between the other group of the connecting frames and the mixing cylinder.

[0014] Two groups of auxiliary frames are provided on the moving plate. One group of the auxiliary frames is threadedly connected to the screw rod. The other group of the auxiliary frames is slidably connected to the guide rod.

[0015] Preferably, the second power device includes a second motor provided on the moving plate. The stirring shaft is driven by the second motor. The second motor is electrically connected to the controller.

[0016] Preferably, the connecting plate is arranged in a cross shape, and four groups of installation grooves are formed in the connecting plate.

[0017] Preferably, a shock-absorbing base is provided at the bottom of the mixing cylinder.

[0018] Preferably, a plurality of paint chambers are provided in the feed cylinder. Feed pipes corresponding to the paint chambers are provided between the feed cylinder and the moving plate.

[0019] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. Description of the Drawings

[0020] Figure 1 is one of the perspective views of the three-dimensional diagram of the present utility model.

[0021] Figure 2 is one of the perspective views of the three-dimensional sectional view of the present utility model.

[0022] Figure 3 is Figure 2Partial enlarged view of A.

[0023] Reference numerals: 1, mixing cylinder; 2, moving plate; 3, discharge pipeline; 4, transition hole; 5, feed pipeline; 6, feed cylinder; 7, stirring shaft; 8, connecting plate; 9, stirring blade; 10, installation groove; 11, scraping plate; 12, return spring; 13, sliding groove; 14, auxiliary support; 15, telescopic plate; 16, connecting frame; 17, screw; 18, first motor; 19, guide rod; 20, second motor; 21, shock-absorbing base; 22, coating chamber. Detailed implementation manners

[0024] Regarding the foregoing and other technical contents, features and effects of the present utility model, they will be clearly presented in the following detailed description in conjunction with the attached Figures 1-3 In the detailed description of the embodiments, it will be clearly shown. The structural contents mentioned in the following embodiments are all with reference to the accompanying drawings of the specification.

[0025] The following will describe the exemplary embodiments of the present utility model with reference to the drawings.

[0026] Embodiment 1, A mixing device for preparing waterborne polyurethane coatings, comprising a mixing cylinder 1 and a moving plate 2, characterized in that:

[0027] The bottom of the mixing cylinder 1 is provided with a discharge pipeline 3, and a transition hole 4 is opened at the top. A moving plate 2 is slidably connected in the mixing cylinder 1, and the moving plate 2 is driven by a first power device;

[0028] The moving plate 2 is provided with a feed pipeline 5, and a feed cylinder 6 is provided on the feed pipeline 5;

[0029] The moving plate 2 is rotatably connected with a stirring shaft 7, and the stirring shaft 7 is driven by a second power device;

[0030] The stirring shaft 7 is provided with a connecting plate 8, the bottom of the connecting plate 8 is provided with a stirring blade 9, an installation groove 10 is opened on the connecting plate 8, a scraping plate 11 that cooperates with the inner side wall of the mixing cylinder 1 is slidably connected in the installation groove 10, and a return spring 12 is provided between the scraping plate 11 and the installation groove 10;

[0031] The first power device includes a sliding groove 13 opened on the inner side wall of the mixing cylinder 1, the moving plate 2 is provided with an auxiliary support 14 that cooperates with the sliding groove 13, and a telescopic plate 15 is provided between the sliding groove 13 and the auxiliary support 14;

[0032] A connecting frame 16 is provided on the mixing cylinder 1. A screw rod 17 is rotatably connected between the connecting frame 16 and the top of the mixing cylinder 1. The screw rod 17 is threadedly connected to the auxiliary frame 14. A first motor 18 is provided on the connecting frame 16. The screw rod 17 is driven by the first motor 18. The first motor 18 is electrically connected to the controller;

[0033] The second power device includes a second motor 20 provided on the moving plate 2. The stirring shaft 7 is driven by the second motor 20. The second motor 20 is electrically connected to the controller;

[0034] The connecting plate 8 is arranged in a cross shape, and four groups of mounting grooves 10 are formed on the connecting plate 8;

[0035] Two groups of connecting frames 16 are provided on the mixing cylinder 1. A screw rod 17 is rotatably connected between one group of the connecting frames 16 and the mixing cylinder 1, and a guide rod 19 is fixedly connected between the other group of the connecting frames 16 and the mixing cylinder 1;

[0036] Two groups of auxiliary frames 14 are provided on the moving plate 2. One group of the auxiliary frames 14 is threadedly connected to the screw rod 17, and the other group of the auxiliary frames 14 is slidably connected to the guide rod 19;

[0037] A shock-absorbing base 21 is provided at the bottom of the mixing cylinder 1.

[0038] During use, the paint is placed into the feed cylinder 6. An electromagnetic valve is provided on the feed pipeline 5. The electromagnetic valve is started to control the amount entering the mixing cylinder 1. After placing is completed, the first motor 18 and the second motor 20 are driven simultaneously;

[0039] Driving the first motor 18 can drive the lead screw to rotate. Under the action of the auxiliary frame 14, the moving plate 2 moves vertically along the mixing cylinder 1. By the forward and reverse rotation of the first motor 18, the reciprocating movement of the moving plate 2 is realized, achieving the change of the stirring range. Under the action of the telescopic plate 15, paint leakage is avoided. Under the action of the guide rod 19, the stability of the movement of the moving plate 2 in the mixing cylinder 1 is further improved;

[0040] Driving the second motor 20 drives the stirring shaft 7 to rotate, causing the connecting plate 8, the stirring blades 9 and the scraping plate 11 to make a circumferential movement. The rotation of the stirring blades 9 can make the paint mix evenly. The scraping plate 11 makes a circumferential movement along the inner side wall of the mixing cylinder 1. Under the action of the return spring 12, the scraping plate 11 always fits with the inner side wall of the mixing cylinder 1, scraping off the paint remaining on the mixing cylinder 1;

[0041] Through the cooperation of the first motor 18 and the second motor 20, the stirring range can be changed and the paint remaining on the inner wall of the mixing cylinder 1 can be scraped off, solving the technical problem that the traditional stirring and mixing device scrapes the sticky paint on the wall by adding a scraper 11. However, since the scraper 11 will be worn after long-term use, the scraper 11 cannot contact the inner wall of the stirring tank, the stirring shaft 7 is fixedly arranged, and the stirring range is also fixed, which will lead to uneven stirring.

[0042] Embodiment 2, on the basis of Embodiment 1, a plurality of paint chambers 22 are provided in the feed cylinder 6, and a feed pipe 5 corresponding to the paint chamber 22 is provided between the feed cylinder 6 and the moving plate 2.

[0043] The above description is only for the purpose of illustrating the present invention, and it should be understood that the present invention is not limited to the above embodiments, and various equivalent forms conforming to the idea of the present invention are within the protection scope of the present invention.

Claims

1. A mixing device for preparing aqueous polyurethane coatings, comprising a mixing cylinder (1) and a moving plate (2), characterized in that: A discharge pipe (3) is provided at the bottom of the mixing cylinder (1), and a transition hole (4) is provided at the top. A moving plate (2) is slidably connected in the mixing cylinder (1), and the moving plate (2) is driven by a first power device; A feed pipe (5) is provided on the moving plate (2), and a feed cylinder (6) is provided on the feed pipe (5); A stirring shaft (7) is rotatably connected to the moving plate (2), and the stirring shaft (7) is driven by a second power device; A connecting plate (8) is provided on the stirring shaft (7), a stirring blade (9) is provided at the bottom of the connecting plate (8), an installation groove (10) is provided on the connecting plate (8), and a scraping plate (11) that cooperates with the inner side wall of the mixing cylinder (1) is slidably connected in the installation groove (10). A return spring (12) is provided between the scraping plate (11) and the installation groove (10).

2. The mixing device for preparing the aqueous polyurethane coating according to claim 1, wherein, The first power device includes a sliding groove (13) provided on the inner side wall of the mixing cylinder (1), an auxiliary frame (14) is provided on the moving plate (2) and cooperates with the sliding groove (13), and a telescopic plate (15) is provided between the sliding groove (13) and the auxiliary frame (14); A connecting frame (16) is provided on the mixing cylinder (1), a screw rod (17) is rotatably connected between the connecting frame (16) and the top of the mixing cylinder (1), the screw rod (17) is threadedly connected to the auxiliary frame (14), a first motor (18) is provided on the connecting frame (16), the screw rod (17) is driven by the first motor (18), and the first motor (18) is electrically connected to the controller.

3. The mixing device for preparing the waterborne polyurethane coating according to claim 2, characterized in that, Two groups of connecting frames (16) are provided on the mixing cylinder (1). A screw rod (17) is rotatably connected between one group of the connecting frames (16) and the mixing cylinder (1), and a guide rod (19) is fixedly connected between the other group of the connecting frames (16) and the mixing cylinder (1); Two groups of auxiliary frames (14) are provided on the moving plate (2). One group of the auxiliary frames (14) is threadedly connected to the screw rod (17), and the other group of the auxiliary frames (14) is slidably connected to the guide rod (19).

4. A mixing device for preparing an aqueous polyurethane coating according to claim 1, characterized in that, The second power device includes a second motor (20) provided on the moving plate (2), the stirring shaft (7) is driven by the second motor (20), and the second motor (20) is electrically connected to the controller.

5. A mixing device for preparing waterborne polyurethane coatings according to any one of claims 1-4, characterized in that, The connecting plate (8) is arranged in a cross shape, and four groups of installation grooves (10) are provided on the connecting plate (8).

6. A mixing device for preparing waterborne polyurethane coatings according to any one of claims 1-4, characterized in that, A shock-absorbing base (21) is provided at the bottom of the mixing cylinder (1).

7. According to the mixing device for preparing aqueous polyurethane coatings according to any one of claims 1-4, a plurality of coating chambers (22) are provided in the feed cylinder (6), and a feed pipe (5) corresponding to the coating chambers (22) is provided between the feed cylinder (6) and the moving plate (2).

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