A mixing device for producing a polyurethane foam sealant

Abstract

The utility model relates to production mixing technology field discloses a kind of polyurethane foam caulking compound production is with mixing device, including supporting leg, the supporting leg side wall is fixedly connected with stirring tank, the stirring tank top is fixedly connected with top cover, the top cover inside is fixedly connected with inlet pipe, the stirring tank outer wall is fixedly connected with first connecting pipe, the first connecting pipe inside is provided with bearing assembly, the top cover top is fixedly connected with first motor, the first motor output end is fixedly connected with transmission shaft, the transmission shaft outer wall is provided with stirring assembly. In the utility model, by the rotation of propeller blade in the inner wall of stirring tank, the liquid adhered to the inner wall of stirring tank is scraped off, the liquid is stirred evenly by the rotation of shearing blade, the liquid is prevented from sinking to the bottom by anchor blade, the problem that high-viscosity material is easy to form flow dead zone when single blade is stirred, leading to incomplete local reaction is solved, and the practicability of polyurethane foam caulking compound production mixing device is improved.

Description

Technical Field

[0001] This utility model relates to the field of production mixing technology, and in particular to a mixing device for producing polyurethane foam sealant. Background Technology

[0002] Polyurethane foam sealant, a widely used sealing material in construction, automotive, and home appliance industries, directly depends on the uniformity of mixing during the production process to ensure its stability. Because polyurethane raw materials typically have high viscosity, and the reaction involves the precise proportioning of multiple components such as foaming agents and catalysts, traditional mixing equipment often struggles to achieve sufficient micro-dispersion and macro-flow, leading to problems such as uneven cell structure and decreased mechanical properties in the final product.

[0003] Currently, most mixing devices used in the production of polyurethane foam sealant employ a single-shaft mixing structure, such as paddle mixers, turbine mixers, or ribbon mixers. These mixing devices typically rely on a single type of mixing blade, with a motor driving the mixing shaft to rotate, causing the material to circulate within the tank. Some improved equipment adds a static mixer or uses a multi-speed motor to adjust the mixing intensity, thereby enhancing the mixing effect. Furthermore, some high-end mixing devices employ a staged feeding method, mixing the main raw materials first and then gradually adding additives to reduce the problem of uneven concentration in certain areas.

[0004] However, the aforementioned mixing device still has significant drawbacks in practical applications. Due to the high viscosity and poor flowability of polyurethane raw materials, a single stirring blade cannot simultaneously meet the requirements of scraping material from the tank wall, shearing at the center, and preventing sedimentation at the bottom. This leads to the formation of dead zones within the mixing tank, resulting in some materials failing to mix adequately. This not only reduces reaction efficiency but also affects the uniformity of cell structure and mechanical properties of the final product due to incomplete local reactions. Therefore, a mixing device for polyurethane foam sealant production is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a mixing device for the production of polyurethane foam sealant, which aims to improve the problem that high-viscosity materials are prone to forming flow dead zones when a single blade is used for stirring in the prior art, resulting in incomplete local reactions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A mixing device for producing polyurethane foam sealant includes a support leg, a mixing tank fixedly connected to the side wall of the support leg, a top cover fixedly connected to the top of the mixing tank, an inlet pipe fixedly connected inside the top cover, a first connecting pipe fixedly connected to the outer wall of the mixing tank, a bearing component disposed inside the first connecting pipe, a first motor fixedly connected to the top of the top cover, a drive shaft fixedly connected to the output end of the first motor, and a mixing component disposed on the outer wall of the drive shaft.

[0008] The stirring assembly includes a propeller blade, the sidewall of which is fixedly connected to the outer wall of the drive shaft. A shear blade is fixedly connected to the outer wall of the drive shaft. An anchor blade is fixedly connected to the bottom of the drive shaft. The outer wall of the anchor blade is rotatably connected to the bottom of the stirring tank. The outer wall of the shear blade is rotatably connected to the inside of the stirring tank. The sidewall of the propeller blade is rotatably connected to the inner wall of the stirring tank.

[0009] As a further description of the above technical solution:

[0010] The supporting component includes a material carrier tube, the outer wall of which is fixedly connected to the inner wall of a first connecting tube, a second motor fixedly connected to the top of the material carrier tube, a scraper blade fixedly connected to the output end of the second motor, and the side wall of the scraper blade rotatably connected to the inner wall of the material carrier tube.

[0011] As a further description of the above technical solution:

[0012] The material carrier tube is fixedly connected to a second connecting tube inside, and the outer wall of the second connecting tube is fixedly connected to the inside of the first connecting tube.

[0013] As a further description of the above technical solution:

[0014] A spiral column is fixedly connected to the outer wall of the scraper blade, and the outer wall of the spiral column is rotatably connected to the inside of the material carrying tube.

[0015] As a further description of the above technical solution:

[0016] A first connecting block is fixedly connected to the outer wall of the material loading tube, and a first rotating plate is rotatably connected to the side wall of the first connecting block.

[0017] As a further description of the above technical solution:

[0018] A hydraulic cylinder is fixedly connected to the bottom of the first rotating plate, and a second connecting block is fixedly connected to the output end of the hydraulic cylinder.

[0019] As a further description of the above technical solution:

[0020] The second connecting block is rotatably connected to a second rotating block on its side wall, and a rotating door is fixedly connected to the side wall of the second rotating block. A first support block is fixedly connected to the top of the rotating door.

[0021] As a further description of the above technical solution:

[0022] The first support block has a rotatable limit post inside, and one end of the limit post is fixedly connected to the outer wall of the material loading tube.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the propeller blades rotate on the inner wall of the mixing tank to scrape off the liquid adhering to the inner wall of the mixing tank. Then, the shear blades rotate to stir the liquid evenly. Finally, the anchor blades prevent the liquid from settling to the bottom, achieving a stable and efficient stirring effect. This solves the problem that when a single blade is used for stirring, high-viscosity materials are prone to forming flow dead zones, resulting in incomplete local reactions. This improves the practicality of the mixing device for polyurethane foam sealant production.

[0025] 2. In this utility model, the rotation of the spiral column drives the liquid to rotate, and then the output end of the hydraulic cylinder drives the second connecting block to move. Then the second connecting block drives the second rotating block and the rotating door on the side wall to rotate. The rotating door is limited by the limiting column, which achieves the effect of quantitatively dispensing additives. This solves the problem of inaccurate dispensing of foam additives, which affects the fluctuation of foam density and leads to unstable product quality. It also improves the stability of the mixing device for polyurethane foam sealant production. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a mixing device for producing polyurethane foam sealant according to the present invention.

[0027] Figure 2 This is a schematic diagram of the outer wall structure of the mixing tank of a mixing device for producing polyurethane foam sealant according to this utility model.

[0028] Figure 3 This is a schematic cross-sectional view of the mixing tank of a mixing device for producing polyurethane foam sealant, as proposed in this utility model.

[0029] Figure 4 This is a schematic cross-sectional view of the first connecting pipe of a mixing device for producing polyurethane foam sealant according to the present invention.

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0031] Legend:

[0032] 1. Support leg; 2. Top cover; 3. Feed pipe; 4. First motor; 5. First connecting pipe; 6. Mixing tank; 7. Drive shaft; 8. Propeller blade; 9. Shear blade; 10. Anchor blade; 11. Second motor; 12. Loading pipe; 13. Second connecting pipe; 14. Scraper blade; 15. Spiral column; 16. First connecting block; 17. First rotating plate; 18. Hydraulic cylinder; 19. Second connecting block; 20. Second rotating block; 21. First support block; 22. Limiting post; 23. Rotating door. Detailed Implementation

[0033] 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.

[0034] Reference Figures 1-3 This utility model provides an embodiment of a mixing device for producing polyurethane foam sealant, comprising a support leg 1, a mixing tank 6 fixedly connected to the side wall of the support leg 1, the mixing tank 6 being composed of a 304 stainless steel cylinder, a polyurethane insulation layer, and a carbon steel support frame, with a working pressure of 0.4 MPa and a volume selectable from 500 to 2000 L, its multi-layer structure design conforming to the GB150-2011 pressure vessel standard, a top cover 2 fixedly connected to the top of the mixing tank 6, and a feed pipe 3 fixedly connected inside the top cover 2, the outer wall of the mixing tank 6 being fixedly connected to the top cover 2. A first connecting pipe 5 is fixedly connected, and a bearing component is installed inside the first connecting pipe 5. A first motor 4 is fixedly connected to the top of the top cover 2. The first motor 4 is a Siemens 1LE0003 series three-phase asynchronous motor with a power range of 7.5-15kW, which is used to drive the stirring system. Its frequency conversion control characteristics can achieve stepless speed regulation of 50-1450rpm. It is a conventional configuration for chemical equipment and is existing technology, so it will not be described in detail here. A drive shaft 7 is fixedly connected to the output end of the first motor 4, and a stirring component is installed on the outer wall of the drive shaft 7.

[0035] The mixing assembly includes a propeller blade 8, which, in conjunction with a shear blade 9 and an anchor blade 10, performs a compound three-dimensional motion, achieving a dual mixing effect of macroscopic circulation and microscopic dispersion. The propeller blade 8 rotates along the tank wall to eliminate flow dead zones, the shear blade 9 breaks up particles, and the anchor blade 10 prevents bottom sedimentation. The synergistic effect of these three components improves the uniformity of material mixing. The sidewall of the propeller blade 8 is fixedly connected to the outer wall of the drive shaft 7, the shear blade 9 is fixedly connected to the outer wall of the drive shaft 7, and the bottom of the drive shaft 7 is fixedly connected to the anchor blade 10. The outer wall of the anchor blade 10 is rotatably connected to the bottom of the mixing tank 6, the outer wall of the shear blade 9 is rotatably connected to the inside of the mixing tank 6, and the sidewall of the propeller blade 8 is rotatably connected to the inner wall of the mixing tank 6.

[0036] Reference Figure 1 , Figure 4 and Figure 5 The supporting component includes a material carrier tube 12, the outer wall of which is fixedly connected to the inner wall of a first connecting tube 5. A second motor 11 is fixedly connected to the top of the material carrier tube 12, and a scraper blade 14 is fixedly connected to the output end of the second motor 11. The side wall of the scraper blade 14 is rotatably connected to the inner wall of the material carrier tube 12. A second connecting tube 13 is fixedly connected inside the material carrier tube 12, and the outer wall of the second connecting tube 13 is fixedly connected to the inside of the first connecting tube 5. A spiral column 15 is fixedly connected to the outer wall of the scraper blade 14, and the outer wall of the spiral column 15 is rotatably connected to the inside of the material carrier tube 12. A first connecting block 16 is fixedly connected to the outer wall of the material loading tube 12. A first rotating plate 17 is rotatably connected to the side wall of the first connecting block 16. A hydraulic cylinder 18 is fixedly connected to the bottom of the first rotating plate 17. A second connecting block 19 is fixedly connected to the output end of the hydraulic cylinder 18. A second rotating block 20 is rotatably connected to the side wall of the second connecting block 19. A rotating door 23 is fixedly connected to the side wall of the second rotating block 20. A first support block 21 is fixedly connected to the top of the rotating door 23. A limit post 22 is rotatably connected inside the first support block 21. One end of the limit post 22 is fixedly connected to the outer wall of the material loading tube 12.

[0037] Working Principle: When this mixing device for polyurethane foam sealant production is in operation, the main raw material enters the mixing tank 6 through the feed pipe 3. The first motor 4 drives the transmission shaft 7 to drive the propeller blade 8, shear blade 9, and anchor blade 10 for compound mixing. The propeller blade 8 rotates along the inner wall of the mixing tank 6, scraping off the material adhering to the tank wall and promoting the overall circulation; the shear blade 9 rotates at high speed to generate strong shearing force, breaking up the foaming agent agglomerates and ensuring uniform dispersion of trace additives; the anchor blade 10 rotates close to the bottom of the tank to prevent the deposition of high-viscosity materials. The three sets of blades work together to achieve all-round mixing from macro-mixing to micro-dispersion, effectively eliminating the flow dead zone problem existing in traditional single mixing.

[0038] When the additive is quantitatively added, the second motor 11 first drives the scraper blade 14 and the spiral column 15 to rotate, so as to evenly transport the additive in the loading pipe 12 to the second connecting pipe 13. The hydraulic cylinder 18 drives the rotating door 23 to rotate around the limiting column 22 by pushing the second connecting block 19, so as to accurately control the opening of the additive outlet and realize quantitative addition as needed. This linkage mechanism can ensure that the addition accuracy of key components such as foaming agent and catalyst is small, and ensure the stability of foam density and curing quality from the source.

[0039] 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 mixing device for producing polyurethane foam sealant, comprising support legs (1), characterized in that: The side wall of the support leg (1) is fixedly connected to a mixing tank (6), the top of the mixing tank (6) is fixedly connected to a top cover (2), the inside of the top cover (2) is fixedly connected to a feed pipe (3), the outer wall of the mixing tank (6) is fixedly connected to a first connecting pipe (5), the inside of the first connecting pipe (5) is provided with a bearing component, the top of the top cover (2) is fixedly connected to a first motor (4), the output end of the first motor (4) is fixedly connected to a drive shaft (7), and the outer wall of the drive shaft (7) is provided with a stirring component; The stirring assembly includes a propeller blade (8), the side wall of which is fixedly connected to the outer wall of the drive shaft (7), a shear blade (9) is fixedly connected to the outer wall of the drive shaft (7), an anchor blade (10) is fixedly connected to the bottom of the drive shaft (7), the outer wall of the anchor blade (10) is rotatably connected to the bottom of the stirring tank (6), the outer wall of the shear blade (9) is rotatably connected to the inside of the stirring tank (6), and the side wall of the propeller blade (8) is rotatably connected to the inner wall of the stirring tank (6).

2. The mixing device for producing polyurethane foam sealant according to claim 1, characterized in that: The supporting component includes a material carrier tube (12), the outer wall of which is fixedly connected to the inner wall of the first connecting tube (5), a second motor (11) is fixedly connected to the top of the material carrier tube (12), a scraper blade (14) is fixedly connected to the output end of the second motor (11), and the side wall of the scraper blade (14) is rotatably connected to the inner wall of the material carrier tube (12).

3. The mixing device for producing polyurethane foam sealant according to claim 2, characterized in that: The material carrier tube (12) is fixedly connected to a second connecting tube (13), and the outer wall of the second connecting tube (13) is fixedly connected to the inside of the first connecting tube (5).

4. The mixing device for producing polyurethane foam sealant according to claim 3, characterized in that: The outer wall of the scraper blade (14) is fixedly connected to a spiral column (15), and the outer wall of the spiral column (15) is rotatably connected to the inside of the material carrier tube (12).

5. A mixing device for producing polyurethane foam sealant according to claim 4, characterized in that: The outer wall of the material carrier tube (12) is fixedly connected to a first connecting block (16), and the side wall of the first connecting block (16) is rotatably connected to a first rotating plate (17).

6. A mixing device for producing polyurethane foam sealant according to claim 5, characterized in that: A hydraulic cylinder (18) is fixedly connected to the bottom of the first rotating plate (17), and a second connecting block (19) is fixedly connected to the output end of the hydraulic cylinder (18).

7. A mixing device for producing polyurethane foam sealant according to claim 6, characterized in that: The second connecting block (19) is rotatably connected to the side wall of the second rotating block (20), and the side wall of the second rotating block (20) is fixedly connected to the rotating door (23). The top of the rotating door (23) is fixedly connected to the first support block (21).

8. A mixing device for producing polyurethane foam sealant according to claim 7, characterized in that: The first support block (21) is rotatably connected to a limiting post (22), one end of which is fixedly connected to the outer wall of the material loading tube (12).

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